Alert archive / Iowa / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Des Moines, IA
NWS Des Moines, IA issued this red flag warning at Mar 7, 2021, 2:27 AM CST for 10 counties in Iowa. It took effect at Mar 7, 2021, 12:00 PM CST. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Mar 7, 2021, 2:27 AM CST (08:27 UTC)
- In effect from
- Mar 7, 2021, 12:00 PM CST
- Expired
- Mar 7, 2021, 6:00 PM CST
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
Counties Adair County, IA, Adams County, IA, Cass County, IA, Clarke County, IA, Decatur County, IA, Madison County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wayne County, IA
The radar
The Des Moines radar (KDMX), 91 km from the middle of the area, began a volume at 08:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 8.5 hours before the alert went out and 183 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2369 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 146 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
890 WWUS83 KDMX 070827 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 227 AM CST Sun Mar 7 2021 ...Extreme Fire Weather Conditions over Southwest Iowa this Afternoon... .The combination of warm temperatures, gusty southwest winds, low humidity, and dry grasses will produce extreme fire weather conditions over southwest Iowa this afternoon. IAZ070>072-081>083-092>095-071630- /O.NEW.KDMX.FW.W.0001.210307T1800Z-210308T0000Z/ Cass-Adair-Madison-Adams-Union-Clarke-Taylor-Ringgold-Decatur- Wayne- 227 AM CST Sun Mar 7 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM CST THIS EVENING FOR EXTREME FIRE CONDITIONS.... The National Weather Service in Des Moines has issued a Red Flag Warning FOR EXTREME FIRE CONDITIONS, which is in effect from noon today to 6 PM CST this evening. * RELATIVE HUMIDITY...As low as 25 percent. * IMPACTS...Any fires that start this afternoon may spread rapidly and become uncontrollable. * TIMING...This afternoon and early evening * WIND...Southwest wind 20 to 25 mph, with peak gusts 30 to 40 mph. * FUEL...Grasslands and any lingering crops debris remain dry and able to burn easily. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. && $$ Small
2 follow-up statements
848 WWUS83 KDMX 072036 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 236 PM CST Sun Mar 7 2021 ...Extreme Fire Weather Conditions Southwest Iowa through 6 PM... .The combination of warm temperatures, gusty southwest winds, low humidity and dry grasses will produce extreme fire weather conditions over southwest Iowa through 6 PM. IAZ070>072-081>083-092>095-080000- /O.CON.KDMX.FW.W.0001.000000T0000Z-210308T0000Z/ Cass-Adair-Madison-Adams-Union-Clarke-Taylor-Ringgold-Decatur- Wayne- 236 PM CST Sun Mar 7 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR EXTREME FIRE CONDITIONS.... * RELATIVE HUMIDITY...As low as 25 percent. * IMPACTS...Any fires that start this afternoon may spread rapidly and become uncontrollable. * TIMING...Through early evening * WIND...Southwest wind 20 to 25 mph with peak gusts 30 to 40 mph. * FUEL...Grasslands and any lingering crops debris remain dry and able to burn easily. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ REV
114 WWUS83 KDMX 080000 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 600 PM CST Sun Mar 7 2021 ...Red Flag Warning Expires at 6 PM... .Winds gradually relax this evening along with improving relative humidity, thus extreme fire danger is no longer a concern. IAZ070>072-081>083-092>095-080100- /O.EXP.KDMX.FW.W.0001.000000T0000Z-210308T0000Z/ Cass-Adair-Madison-Adams-Union-Clarke-Taylor-Ringgold-Decatur- Wayne- 600 PM CST Sun Mar 7 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR FIRE WEATHER ZONES 070, 071, 072, 081, 082, 083, 092, 093, 094, AND 095... $$
Nearby
Red Flag Warnings in Iowa, 2021Every red flag warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.