Weather Alert in Iowa
Air Quality Alert issued August 1 at 12:38PM CDT by NWS Des Moines IA
AREAS AFFECTED: Lyon; Osceola; Dickinson; Emmet; Kossuth; Winnebago; Worth; Mitchell; Howard; Winneshiek; Allamakee; Sioux; O'Brien; Clay; Palo Alto; Hancock; Cerro Gordo; Floyd; Chickasaw; Plymouth; Cherokee; Buena Vista; Pocahontas; Humboldt; Wright; Franklin; Butler; Bremer; Fayette; Clayton; Woodbury; Ida; Sac; Calhoun; Webster; Hamilton; Hardin; Grundy; Black Hawk; Buchanan; Delaware; Dubuque; Monona; Crawford; Carroll; Greene; Boone; Story; Marshall; Tama; Benton; Linn; Jones; Jackson; Harrison; Shelby; Audubon; Guthrie; Dallas; Polk; Jasper; Poweshiek; Iowa; Johnson; Cedar; Clinton; Muscatine; Scott; Pottawattamie; Cass; Adair; Madison; Warren; Marion; Mahaska; Keokuk; Washington; Louisa; Mills; Montgomery; Adams; Union; Clarke; Lucas; Monroe; Wapello; Jefferson; Henry; Des Moines; Fremont; Page; Taylor; Ringgold; Decatur; Wayne; Appanoose; Davis; Van Buren; Lee
DESCRIPTION: The Iowa DNR is extending the Air Quality Alert for all of Iowa through 8 AM Sunday. Moderate to heavy smoke is expected to continue impacting most of Iowa at levels considered unhealthy for sensitive groups or even unhealthy for healthy individuals. Sensitive groups include people with respiratory illness or heart disease, children, teenagers, the elderly, and outdoor workers. The DNR recommends that people avoid long or intense outdoor activities and take frequent breaks until the air quality improves.
INSTRUCTION: N/A
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Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
Weather Topic: What is Graupel?
Home - Education - Precipitation - Graupel
Next Topic: Hail
Graupel is a form of precipitation that is created by atmospheric conditions
which cause supercooled water droplets to contact snow crystals and freeze to
their surface.
Sometimes known as soft hail or snow pellets, graupel is delicate and easily
destroyed by touch. Whereas hail usually falls during severe weather, graupel
doesn't require such conditions to form, and can form in mild precipitation
similar to situations which produce snowfall.
Next Topic: Hail
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