Weather Alert in Iowa
Red Flag Warning issued March 27 at 11:52AM CDT until March 27 at 9:00PM CDT by NWS Des Moines IA
AREAS AFFECTED: Sac; Calhoun; Webster; Hamilton; Boone; Story; Jasper; Marion; Mahaska; Monroe; Wapello; Appanoose; Davis
DESCRIPTION: ...Critical Fire Weather Conditions Expected Today and Saturday... .Breezy northwest winds, along with cured fuels and low RH values in the 20s, especially over southern and much of central Iowa this afternoon to evening will lead to critical fire weather conditions. Saturday will feature even gustier winds out of the southwest, along with lower RH values, warming temperatures and dry fuels, leading to continued critical fire weather conditions. Burning is not recommended. ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 9 PM CDT SATURDAY FOR CRITICAL FIRE WEATHER CONDITIONS FOR PORTIONS OF NORTH CENTRAL TO SOUTHEASTERN IOWA... The National Weather Service in Des Moines has issued a Red Flag Warning, which is in effect until 9 PM CDT this evening. A Red Flag Warning has also been issued from 10 AM to 9 PM CDT Saturday. The Fire Weather Watch is no longer in effect. * WIND...For Today, Northwest winds at 10-15 mph, gusting to 20-30 mph. For Saturday, Southwest winds at 20-25 mph, gusting to 30-40 mph. * HUMIDITY...For Today, minimum values of 20-25 percent. For Saturday, minimum values of around 15 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
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 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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