Alert archive / Iowa / Red Flag Warnings in 2021
Red Flag Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this red flag warning at Mar 10, 2021, 4:02 AM CST for 6 counties in Iowa. It took effect at Mar 10, 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 10, 2021, 4:02 AM CST (10:02 UTC)
- In effect from
- Mar 10, 2021, 12:00 PM CST
- Expired
- Mar 10, 2021, 6:00 PM CST
- In force
- 6 hr
- Issued by
- NWS Des Moines, IA
Counties Adair County, IA, Adams County, IA, Audubon County, IA, Cass County, IA, Guthrie County, IA, Taylor County, IA
The radar
The Des Moines radar (KDMX), 94 km from the middle of the area, began a volume at 10:02 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, 10.0 hours before the alert went out and 139 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
- 3 J/kg
- Mixed-layer CIN
- -270 J/kg
- Mixed-layer LCL
- 1797 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 118 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
151 WWUS83 KDMX 101002 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 402 AM CST Wed Mar 10 2021 ...Extreme Fire Weather Conditions Developing over Southwest Iowa Late this Morning into this Afternoon... .Windy and warm conditions along with low humidity and dry grasses will produce extreme fire weather conditions over southwest Iowa by late this morning into this afternoon. IAZ057-058-070-071-081-092-101815- /O.NEW.KDMX.FW.W.0002.210310T1800Z-210311T0000Z/ Audubon-Guthrie-Cass-Adair-Adams-Taylor- 402 AM CST Wed Mar 10 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 26 percent. * Impacts...Any fires that start this afternoon may spread rapidly and become uncontrollable. * TIMING...Late this morning through this afternoon * WIND...South winds becoming southwest averaging between 25 and 35 mph and gusting up to around 50 mph at times. * FUEL...Grasslands and any lingering crops debris are 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. && $$ Ansorge
3 follow-up statements
206 WWUS83 KDMX 101550 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 950 AM CST Wed Mar 10 2021 ...Extreme Fire Weather Conditions Expected over Southwest Iowa into this Afternoon... .Very windy and warm conditions along with low humidity and dry grasses and other fuels will produce extreme fire weather conditions over southwest Iowa late this morning and into the afternoon hours. IAZ057-058-070-071-081-092-110000- /O.CON.KDMX.FW.W.0002.210310T1800Z-210311T0000Z/ Audubon-Guthrie-Cass-Adair-Adams-Taylor- 950 AM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR EXTREME FIRE CONDITIONS.... * Relative Humidity...As low as 26 percent. * Impacts...Any fires that start this afternoon may spread rapidly and become uncontrollable. * TIMING...Late this morning through this afternoon * WIND...South winds becoming southwest averaging between 25 and 35 mph and gusting up to around 50 mph at times. * FUEL...Grasslands and any lingering crops debris are dry and able to burn easily. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ KLP
693 WWUS83 KDMX 102046 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 246 PM CST Wed Mar 10 2021 ...Extreme Fire Weather Conditions Continue over Southwest Iowa this Afternoon... .Very windy and warm conditions along with low humidity and dry grasses and other fuels will produce extreme fire weather conditions over southwest Iowa late this morning and into the afternoon hours. IAZ057-058-070-071-081-092-110000- /O.CON.KDMX.FW.W.0002.000000T0000Z-210311T0000Z/ Audubon-Guthrie-Cass-Adair-Adams-Taylor- 246 PM CST Wed Mar 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR EXTREME FIRE CONDITIONS.... * Relative Humidity...As low as 28 percent. * Impacts...Any fires that start this afternoon may spread rapidly and become uncontrollable. * TIMING...Late this morning through this afternoon * WIND...South winds becoming southwest averaging between 30 and 40 mph and gusting up to 50 to 60 mph at times. * FUEL...Grasslands and any lingering crops debris are 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. && $$ KLP
230 WWUS83 KDMX 110001 RFWDMX URGENT - FIRE WEATHER MESSAGE National Weather Service Des Moines IA 601 PM CST Wed Mar 10 2021 IAZ057-058-070-071-081-092-110115- /O.EXP.KDMX.FW.W.0002.000000T0000Z-210311T0000Z/ Audubon-Guthrie-Cass-Adair-Adams-Taylor- 601 PM CST Wed Mar 10 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR EXTREME FIRE CONDITIONS.... Strong winds, warm temperatures, and dry conditions that combined to produce red flag warning criteria this afternoon have eased this evening. Therefore the red flag warning will be allowed to expire at 6pm. $$ CURTIS
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 10, 3:55 AM CST | Wind Advisory | DMX | Adair, Adams, Appanoose, Audubon, Black Hawk, Boone and 45 more | 20 hr |
| Mar 10, 2:15 PM CST | High Wind Warning | DMX | Adair, Adams, Audubon, Carroll, Cass, Crawford and 4 more | 4 hr |
| Mar 10, 5:18 PM CST | Severe Thunderstorm Warning | DMX | Clarke, Union | 24 min |
| Mar 10, 5:34 PM CST | Severe Thunderstorm Warning | DMX | Grundy, Marshall | 24 min |
| Mar 10, 5:36 PM CST | Severe Thunderstorm Warning | DMX | Clarke, Decatur, Lucas | 39 min |
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.