Weather Alert in Wyoming

Recent Locations: Grapevine, AR Terre Haute, IN Hulett, WY

Red Flag Warning issued August 13 at 7:59PM MDT until August 14 at 8:00PM MDT by NWS Riverton WY

AREAS AFFECTED: Lincoln and Uinta Counties/Lower Elevations; Upper Green River Basin/Rock Springs BLM; Absaroka Mountains/North Shoshone NF; East Wind River Mountains/South Shoshone NF; Salt and Wyoming Ranges/West Zone Bridger Teton NF; North Zone Bridger Teton NF and Grand Teton NP; West Wind River Mountains/East Zone Bridger Teton NF

DESCRIPTION: * AFFECTED AREA: In Central WY Fire Zone....288. In Northwest WY Fire Zones...286...415. In Southwest WY Fire Zone....277. In West Central WY Fire Zones...278...414...416. * COUNTIES AFFECTED: In Central WY...Fremont. In North Central WY...Hot Springs...Park. In Southwest WY...Sweetwater...Teton...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities...Above Normal Temperatures...and Gusty West Winds could cause erratic fire behavior. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: 14 to 19 percent. * TEMPERATURES: Highs 74 to 79 in Zones 286, 288, 414, 415, and 416. Highs 83 to 88 in Zones 277 and 278.

INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

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Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds