Code Yellow: MODERATE Air Quality levels across the East

 

Friday, May 9 ⬠Saturday, May 10: In the East, southerly winds ahead of an approaching low pressure system will transport moisture and pollutants northward into the Northeast, enhancing particle production. In the Midwest an approaching low pressure system will transport moisture and pollutants into the area, causing Air Quality levels to be Code Yellow: MODERATE on Saturday. In addition, sunny skies and warm temperatures in the Southeast will enhance ozone formation, leading to Code Yellow: MODERATE Air Quality levels in Tennessee and North Carolina.

In the South-Central states, sunny skies and warm temperatures will enhance ozone formation, resulting in Code Yellow: MODERATE Air Quality levels.

In the West, mostly sunny skies and warm daytime temperatures will aid ozone production. In addition, gusty winds in the Southwest will cause blowing dust. These conditions will lead to Code Yellow: MODERATE Air Quality levels throughout portions of California, Arizona, and southern Nevada.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in North Carolina, Tennessee

 

Thursday, May 8 ⬠Friday, May 9: : In the East, southerly winds ahead of an approaching low pressure system will transport moisture and pollutants northward into the Midwest and the Northeast, enhancing particle production. In addition, sunny skies and warm temperatures in the Southeast will enhance ozone formation. As a result of these conditions, Air Quality levels will be Code Yellow: MODERATE across much of the east, with sites in the Great Smoky Mountains National Park expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Thursday. In the South-Central states, sunny skies and warm temperatures will enhance ozone formation, resulting in Code Yellow: MODERATE Air Quality levels in Texas, Florida, Louisiana, and Oklahoma.

In the South-Central states, sunny skies and warm temperatures will enhance ozone formation, resulting in Code Yellow: MODERATE Air Quality levels in Texas, Florida, Louisiana, and Oklahoma.

In the West, mostly sunny skies and warm daytime temperatures will aid ozone production. In addition, gusty winds in the Southwest on Friday will cause blowing dust. These conditions will lead to Code Yellow: MODERATE Air Quality levels throughout portions of California, Arizona, and southern Nevada.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in North Carolina and Florida

 

Wednesday, May 7 ⬠Thursday, May 8: In the East, an upper-level ridge of high pressure will limit vertical mixing, trapping pollutants near the surface. In addition, sunny skies and warm temperatures in the southeastern U.S. will enhance ozone formation, and generally light surface winds in that region will limit pollutant dispersion. As a result of these conditions, Air Quality levels will be Code Yellow: MODERATE for ozone across much of the South, with sites in North Carolina and northern Florida expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Wednesday. Father north, southerly winds ahead of a low pressure system approaching the western Great Lakes will transport pollutants and moisture northward, enhancing particle production and causing Air Quality levels to be Code Yellow: MODERATE in the Midwest and Mid-Atlantic states.

In the West, generally light overnight winds and patchy fog in some low-lying areas will enhance particle formation. Furthermore, mostly sunny skies and warm daytime temperatures will aid ozone production. These conditions will lead to Code Yellow: MODERATE Air Quality levels throughout portions of California, Arizona, and southern Nevada.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels California, Arizona, and the South

 

Tuesday, May 6 ⬠Wednesday, May 7: In the West, generally light winds will limit dispersion, allowing pollutants to build up near the surface. In addition, mostly sunny skies and warm temperatures will enhance ground-level ozone formation. These conditions will lead to Code Yellow: MODERATE Air Quality levels throughout much of the Southwest, with sites in the Phoenix, AZ, region and California's San Joaquin Valley expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels for ozone.

In the East, an upper-level ridge of high pressure building over the eastern Great Lakes will reduce vertical mixing, trapping pollutants near the surface. Furthermore, warm temperatures and mostly sunny skies will aid ozone production throughout the East. These conditions will lead to widespread Code Yellow: MODERATE Air Quality levels across much of the South, the Midwest, and parts of the Northeast, with some sites in Georgia, Tennessee, and North Carolina forecasted to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Louisiana

 

Monday, May 5 ⬠Tuesday, May 6: Surface High pressure will build into much of the Eastern U.S., leading to sunny skies and seasonably warm temperatures. These conditions will allow ground-level ozone levels to increase. In addition, light winds will limit pollutant dispersion. As a result, Air Quality levels will be Code Yellow: MODERATE in parts of the Northeast, Ohio Valley, Southeast, and South Central U.S. Some areas in Louisiana will experience Code Orange: UNHEALTHY for Sensitive Groups ozone levels.

In the West, gusty will lead to blowing dust across the desert Southwest. In addition, warm temperatures and sunny skies and warm temperatures will enhance ozone formation. These conditions will cause Air Quality levels to be Code Yellow: MODERATE in parts of Arizona and California.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Louisiana on Monday

 

Sunday, May 4 ⬠Monday, May 5: Rain showers and high humidity along a cold front moving through the East Coast will enhance particle formation, leading to Code Yellow: MODERATE Air Quality levels across portions of the Mid-Atlantic States. Behind the front, high pressure will build into much of the Eastern U.S., leading to sunny skies, light winds, and seasonably warm temperatures. These conditions will allow ground-level ozone levels to increase. As a result, Air Quality levels will be Code Yellow: MODERATE in parts of the Northeast and Southeast. Some areas in Louisiana will experience Code Orange: UNHEALTHY for Sensitive Groups ozone levels by Monday.

In the West, gusty will lead to blowing dust in the West. In addition, warm temperatures and sunny skies and warm temperatures will enhance ozone formation. These conditions will cause Air Quality levels to be Code Yellow: MODERATE in parts of California and Arizona.

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Code Yellow: MODERATE Air Quality levels in the East

 

Saturday, May 3 ⬠Sunday, May 4: In the East, generally southerly winds ahead of a low pressure system will transport moisture and pollutants into the Midwest and Mid-Atlantic states, enhancing particle production. Therefore, Air Quality levels will be Code Yellow: MODERATE throughout much of the Midwest and parts of the Mid-Atlantic region. In the South, mostly sunny skies and warm temperatures will aid ozone formation. As a result, Code Yellow: MODERATE Air Quality levels are forecast across the South.

In the West, gusty winds around a low pressure system will lead to blowing dust in the West. In addition, warm temperatures and sunny skies will enhance ozone formation. These conditions will cause Air Quality levels to be Code Yellow: MODERATE in parts of California, Nevada, and Arizona.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality Levels in the West and South

 

Thursday, May 1 ⬠Friday, May 2: In the West, gusty southwesterly winds ahead of a weak cold front will lead to blowing dust in Arizona, New Mexico, and western Texas. These conditions will cause Air Quality levels to be Code Yellow: MODERATE across the region, with sites in Albuquerque, NM, El Paso, TX, and Lubbock, TX expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Thursday.

In the South, mostly sunny skies and warm temperatures will aid ozone formation. As a result, Code Yellow: MODERATE Air Quality levels are forecast across the South, with sites in the Great Smoky Mountains National Park, NC and Columbia, SC reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Thursday. Farther north, generally southerly winds ahead of a low pressure system approaching the Midwest will transport moisture and pollutants into the Midwest and Mid-Atlantic states, enhancing particle production. Furthermore, an upper-level ridge of high pressure building over the eastern U.S. will reduce vertical mixing, trapping pollutants near the surface. Therefore, Air Quality levels will be Code Yellow: MODERATE throughout much of the Midwest and parts of the Mid-Atlantic region.

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healthy for Sensitive Groups Air Quality Levels in Texas

 

Wednesday, April 30 ⬠Thursday, May 1: In the West, gusty southwesterly winds and blowing dust in western Texas will lead to Code Yellow: MODERATE Air Quality levels across the region, with sites in the El Paso area expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Wednesday. In the Southwest, generally light winds will limit pollutant dispersion, and sunny skies and warm temperature will enhance ozone formation. As a result, Air Quality levels will be Code Yellow: MODERATE in central and southern California as well as the Las Vegas, NV and Phoenix, AZ regions.

In the East, surface high pressure over the East Coast, combined with a low pressure system approaching the southern Plains from the West, will cause southerly winds to develop across most of the East. These winds will transport moisture and pollutants into the Midwest and Mid-Atlantic states, enhancing particle production. Furthermore, an upper-level ridge of high pressure building over the eastern U.S. will reduce vertical mixing, trapping pollutants near the surface. In the South, mostly sunny skies and warm temperatures will aid ozone formation. These conditions will lead to widespread Code Yellow: MODERATE Air Quality levels in the South, the Midwest, and parts of the Northeast.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality Levels in Southern California and Texas

 

Tuesday, April 29 ⬠Wednesday, April 30: In the West, sunny skies and warm temperatures across the Southwest will enhance ozone formation. In addition, gusty winds will cause some blowing dust. These conditions will lead to Code Yellow: MODERATE Air Quality levels in parts of Arizona, Nevada, west Texas, and in southern and central California, with the Bakersfield, CA and El Paso, TX areas reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels.

Farther east, sunny skies will enhance ozone formation in the South-Central states. These conditions will result in Code Yellow: MODERATE Air Quality levels in isolated areas of the Midwest and South, with Houston, TX reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Tuesday.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality Levels in Southern California and Texas

 

Monday, April 28 ⬠Tuesday, April 29: In the West, an upper-level ridge of high pressure over the West Coast will limit vertical mixing and lead to sunny skies and warm temperatures across the Southwest, enhancing ozone formation. In addition, gusty winds will cause some blowing dust. These conditions will lead to Code Yellow: MODERATE Air Quality levels in parts of Arizona, Nevada and in southern and central California, with the Bakersfield, CA area reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels.

Farther east, sunny skies will enhance ozone formation in the South-Central states. In addition, gusty winds ahead of a cold front moving through the southern Plains will cause some blowing dust. These conditions will result in Code Yellow: MODERATE Air Quality levels in isolated areas of Tennessee, Oklahoma, Louisiana, and Texas, with the Houston area reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Tuesday.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality Levels in Southern California and Texas

 

Sunday, April 27 ⬠Monday, April 28: In the West, an upper-level ridge of high pressure over the West Coast will limit vertical mixing and lead to sunny skies and warm temperatures across the Southwest. These conditions will enhance ozone formation, causing Air Quality levels to be Code Yellow: MODERATE in parts of Arizona, Nevada and in southern and central California, with parts of southern California reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Sunday.

In the South, surface high pressure will build in behind a cold front moving through Texas, resulting in light winds and allowing pollutants to build up near the surface. In addition, sunny skies will enhance ozone formation on Monday. These conditions will result in Code Yellow: MODERATE Air Quality levels in Texas and Louisiana, with the Houston area reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Monday.

In the East, southeasterly winds ahead of a low pressure system approaching the East Coast will transport pollutants into the Northeast. Furthermore, rain showers and high humidity ahead of the front will enhance particle production. These conditions, along with pollutant carryover from previous days, will lead to Code Yellow: MODERATE Air Quality levels in portions of Ohio and the Mid-Atlantic states on Monday.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality Levels in Southern California

 

Saturday, April 26 ⬠Sunday, April 27: In the West, an upper-level ridge of high pressure building over the West Coast will limit vertical mixing and lead to sunny skies and warm temperatures across the Southwest. These conditions will enhance ozone formation, causing Air Quality levels to be Code Yellow: MODERATE in parts of west Texas, Arizona, Nevada, and southern California, with sites in the Imperial Valley and San Diego regions of California expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels.

In the East, southerly winds ahead of a cold front approaching the East Coast will transport pollutants into the Northeast. Furthermore, rain showers and high humidity ahead of the front will enhance particle production. These conditions, along with pollutant carryover from previous days, will lead to Code Yellow: MODERATE Air Quality levels in portions of Ohio and the Mid-Atlantic states.

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Code Yellow: MODERATE Air Quality levels in the Midwest, South, and West

 

Friday, April 25 ⬠Saturday, April 26: In the East, a low pressure system approaching the western Great Lakes will bring thundershowers and high humidity to the Midwest, enhancing particle production. Furthermore, southerly winds ahead of the low pressure system will transport additional moisture and pollutants into the area. These conditions will lead to widespread Code Yellow: MODERATE Air Quality levels in the eastern Midwest and Mid-Atlantic regions. As the low pressure system moves east on Saturday, enhanced mixing and gusty winds will improve Air Quality levels to Good across much of the Midwest. Farther south, mostly sunny skies and warm temperatures will aid ozone production, causing Air Quality levels to be Code Yellow: MODERATE in parts of Louisiana, North Carolina, and Florida.

In the West, an upper-level ridge of high pressure building over the West Coast will reduce vertical mixing, trapping pollutants near the surface. In addition, generally light winds across the Southwest will limit pollutant dispersion. These conditions, along with warm temperatures and sunny skies enhancing ozone formation, will lead to Code Yellow: MODERATE Air Quality levels in portions of central and southern California, as well as the Phoenix, AZ area.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Phoenix, AZ

 

Thursday, April 24 ⬠Friday, April 25: In the Southwest, warm temperatures and abundant sunshine will aid ozone formation and moderate winds will cause some blowing dust. These conditions will lead to Code Yellow: MODERATE Air Quality levels in Las Vegas, NV and portions of southern California and Arizona, with the Phoenix area reaching Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Thursday.

In the Midwest, southerly winds ahead of a cold front approaching the region will transport moisture and pollutants northward, enhancing particle production. Furthermore, an upper-level ridge of high pressure over the region will limit vertical mixing, trapping pollutants near the surface. As a result of these conditions, Air Quality levels are expected to be Code Yellow: MODERATE throughout most of the Midwest and Mid-Atlantic states. In the South, sunny skies and warm temperatures will enhance ozone formation. In addition, gusty winds will result in some blowing dust in Texas. These conditions will result in Code Yellow: MODERATE Air Quality levels in the Southeast and South-Central states.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Massachusetts and Alabama

 

Wednesday, April 23 ⬠Thursday, April 24: Surface high pressure over the eastern U.S. will produce light winds throughout the East, limiting pollutant dispersion. In addition, mostly sunny skies and warm temperatures throughout the region will enhance ozone production. These conditions, combined with high ozone carryover from previous days, will lead to Code Yellow: MODERATE Air Quality levels throughout much of the Northeast and Mid-Atlantic States, with sites in the Springfield, MA area expected to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Wednesday. Similar conditions in the South will cause ozone levels to be Code Yellow: MODERATE in parts of Louisiana, Alabama, and Florida, with sites in the Mobile, AL area reaching Code Orange: UNHEALTHY for Sensitive Groups.

In the Midwest, generally southerly winds ahead of a cold front approaching the region will transport moisture and pollutants northward, enhancing particle production. Furthermore, an upper-level ridge of high pressure over the region will limit vertical mixing, trapping pollutants near the surface. As a result of these conditions, Air Quality levels are expected to be Code Yellow: MODERATE throughout most of the Midwest.

In the Southwest, warm temperatures and abundant sunshine will aid ozone formation and lead to Code Yellow: MODERATE Air Quality levels in Phoenix, AZ, Las Vegas, NV, and portions of central California.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Louisiana

 

Tuesday, April 22 - Wednesday, April 23: High pressure over the South-Central states will produce sunny skies and warm temperatures, enhancing ozone formation. In addition, generally light winds will limit pollutant dispersion. Therefore, Air Quality levels will be Code Yellow: MODERATE in much of the region, with parts of Louisiana reaching Code Orange: UNHEALTHY for Sensitive Groups for ozone. Farther north, moderate southerly winds ahead of a cold front moving through the Midwest will transport moisture and pollutants into the Midwest and Northeast, enhancing particle formation. In addition, high pressure building into the Midwest behind the cold front will lead to light winds throughout the region, limiting pollutant dispersion and allowing pollutants to build up near the surface. These conditions will lead to Code Yellow: MODERATE Air Quality levels in much of the eastern U.S.

In the Southwest, warm temperatures and sunny skies will aid ozone production. In addition, moderate to strong winds will cause blowing dust in many locations. As a result, Air Quality levels will be Code Yellow: MODERATE in parts of Arizona and southern California.

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Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels in Louisiana

 

Monday, April 21 - Tuesday, April 22: High pressure over the Southeast and South-Central states will produce sunny skies and warm temperatures, enhancing ozone formation. In addition, generally light winds will limit pollutant dispersion. Therefore, Air Quality levels will be Code Yellow: MODERATE for ozone in much of the region, with parts of Louisiana reaching Code Orange: UNHEALTHY for Sensitive Groups. Further north, light to moderate winds across the Midwest and Mid-Atlantic states will transport moisture and pollutants into the region, increasing particle formation and leading to Code Yellow: MODERATE Air Quality levels in these areas.

In the Southwest, warm temperatures and sunny skies will aid ozone production. In addition, moderate to strong winds will cause blowing dust in many locations. As a result, Air Quality levels will be Code Yellow: MODERATE in parts of Arizona and southern California for particles and/or ozone.

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Code Yellow: MODERATE Air Quality levels in the Midwest and South

 

Sunday, April 20 - Monday, April 21: A weak low pressure system moving through the Midwest and East will produce scattered showers and thunderstorms and moderate southerly winds throughout much of the region. These weather conditions will lead to enhanced particle formation and Code Yellow: MODERATE Air Quality levels for many cities. In the Northeast states, air quality will improve on Monday as surface high pressure off the coast of Maine produces moderate northeasterly winds, ushering in a cleaner airmass.

In the South-Central and Southeast states, high pressure over the region will cause mostly sunny skies and warm temperatures. These conditions will increase ozone formation and result in Code Yellow: MODERATE Air Quality levels in many cities.

In the Southwest, a low pressure system over the Rocky Mountains will produce gusty winds, which will cause blowing dust in many locations. In addition, warm temperatures and sunny skies will aid ozone production. These conditions will result in Code Yellow: MODERATE Air Quality levels in parts of Arizona and southern California.

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Code Red: UNHEALTHY of Sensitive Groups Air Quality levels in Ohio and Texas

 

Saturday, April 19 ⬠Sunday, April 20: In the eastern U.S., southerly winds ahead of a cold front moving through the Midwest will transport moisture and pollutants northward into the Midwest and Northeast, enhancing particle production. Furthermore, widespread rain showers associated with the cold front will further aid particle formation. These conditions, combined with high regional pollutant carryover, will result in widespread Code Yellow: MODERATE Air Quality levels in the East, with sites in the Youngstown, OH region reaching Code Orange: UNHEALTHY for Sensitive Groups on Saturday.

In the South, sunny skies and warm temperatures will enhance ozone formation, and light winds will limit pollutant dispersion. As a result, ozone levels are expected to be Code Yellow: MODERATE for portions of Louisiana, Mississippi, Alabama, Florida, and Texas, with sites in the Houston area forecast to reach Code Orange: UNHEALTHY for Sensitive Groups Air Quality levels on Saturday.

In the Southwest, gusty winds will cause blowing dust, resulting in Code Yellow: MODERATE Air Quality levels in Phoenix, AZ. In addition, warm temperatures and mostly sunny skies in Southern California and Nevada will aid ozone production, leading to Code Yellow: MODERATE Air Quality levels for sites in those regions.

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