Alert archive / Iowa / Red Flag Warnings in 2012
Red Flag Warning 2, NWS Des Moines, IA
NWS Des Moines, IA issued this red flag warning at Aug 29, 2012, 3:54 PM CDT for 22 counties in Iowa. It took effect at Aug 30, 2012, 12:00 PM CDT. It was in force for 7 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
- Aug 29, 2012, 3:54 PM CDT (20:54 UTC)
- In effect from
- Aug 30, 2012, 12:00 PM CDT
- Expired
- Aug 30, 2012, 7:03 PM CDT
- In force
- 7 hr
- Issued by
- NWS Des Moines, IA
All 22 counties
Boone County, IA, Butler County, IA, Calhoun County, IA, Carroll County, IA, Cerro Gordo County, IA, Crawford County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Kossuth County, IA, Palo Alto County, IA, Pocahontas County, IA, Sac County, IA, Story County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA
The radar
The Des Moines radar (KDMX), 106 km from the middle of the area, began a volume at 20:56 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 12:00Z, 8.9 hours before the alert went out and 242 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
- 2554 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
618 WWUS83 KDMX 292054 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 354 PM CDT WED AUG 29 2012 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ON THURSDAY IN FAR NORTHERN IOWA... .LOW RELATIVE HUMIDITY...DRY CONDITIONS AND STRONG SOUTHWEST WINDS ARE EXPECTED ON THURSDAY MAKING FOR EXTREME FIRE WEATHER CONDITIONS. IAZ004>007-015>017-300500- /O.UPG.KDMX.FW.A.0002.120830T1700Z-120831T0200Z/ /O.NEW.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- 354 PM CDT WED AUG 29 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CDT THURSDAY 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 TO 8 PM CDT THURSDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * TIMING...THURSDAY AFTERNOON INTO THE EARLY EVENING. * WIND...SOUTHWEST WINDS AT 15 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 20 PERCENT. * FUEL...DRYING OF GRASSES AS WELL AS FIELD CROPS IS UNDERWAY AND AHEAD OF SCHEDULE GIVEN THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...ANY FIRES THAT START WILL SPREAD RAPIDLY DUE TO THE LOW RELATIVE HUMIDITY...DRY FUELS AND STRONG SOUTHWEST WINDS. 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 WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ IAZ023>026-033>036-044-045-300500- /O.NEW.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON- CRAWFORD-CARROLL- 354 PM CDT WED AUG 29 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM CDT THURSDAY FOR EXTREME FIRE CONDITIONS.... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A RED FLAG WARNING FOR EXTREME FIRE CONDITIONS...WHICH IS IN EFFECT FROM NOON TO 8 PM CDT THURSDAY. * TIMING OR SHORT TERM TRENDS...THURSDAY AFTERNOON INTO THE EARLY EVENING. * WIND...SOUTHWEST WINDS AT 15 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 20 PERCENT. * FUEL...DRYING OF GRASSES AS WELL AS FIELD CROPS IS UNDERWAY AND AHEAD OF SCHEDULE GIVEN THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...ANY FIRES THAT START WILL SPREAD RAPIDLY DUE TO THE LOW RELATIVE HUMIDITY...DRY FUELS AND STRONG SOUTHWEST WINDS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ KD
5 follow-up statements
147 WWUS83 KDMX 300209 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 909 PM CDT WED AUG 29 2012 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED ON THURSDAY IN FAR NORTHERN IOWA... .LOW RELATIVE HUMIDITY...DRY CONDITIONS AND STRONG SOUTHWEST WINDS ARE EXPECTED ON THURSDAY MAKING FOR EXTREME FIRE WEATHER CONDITIONS. IAZ004>007-015>017-023>026-033>036-044-045-301015- /O.CON.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON- CRAWFORD-CARROLL- 909 PM CDT WED AUG 29 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM CDT THURSDAY FOR EXTREME FIRE CONDITIONS.... * TIMING OR SHORT TERM TRENDS...THURSDAY AFTERNOON INTO THE EARLY EVENING. * WIND...SOUTHWEST WINDS AT 15 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...AS LOW AS 20 PERCENT. * FUEL...DRYING OF GRASSES AS WELL AS FIELD CROPS IS UNDERWAY AND AHEAD OF SCHEDULE GIVEN THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...ANY FIRES THAT START WILL SPREAD RAPIDLY DUE TO THE LOW RELATIVE HUMIDITY...DRY FUELS AND STRONG SOUTHWEST WINDS. 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 WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
331 WWUS83 KDMX 300919 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 419 AM CDT THU AUG 30 2012 ...CRITICAL FIRE WEATHER CONDITIONS TODAY ACROSS NORTHERN IOWA... .THE COMBINATION OF LOW RELATIVE HUMIDITY...ABNORMALLY DRY CONDITIONS AND STRONG SOUTHWEST WINDS TODAY WILL RESULT IN EXTREME FIRE WEATHER CONDITIONS. IAZ004>007-015>017-023>026-033>036-044-045-301730- /O.CON.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON- CRAWFORD-CARROLL- 419 AM CDT THU AUG 30 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS.... * TIMING OR SHORT TERM TRENDS...THIS AFTERNOON AND EARLY EVENING. * WIND...SOUTHWEST WINDS AT 20 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...15 TO 25 PERCENT. * FUEL...FIELD CROPS ARE NEARLY CURED AND ARE HIGHLY COMBUSTIBLE WHICH WILL LEAD TO RAPID FIRE GROWTH TODAY. IN ADDITION...THE DRYING OF GRASSES IS WELL AHEAD OF SCHEDULE DUE TO THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...FIRES WILL EXPERIENCE RAPIDLY FIRE GROWTH AND WILL BE VERY DIFFICULT TO CONTAIN TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
314 WWUS83 KDMX 301502 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 1002 AM CDT THU AUG 30 2012 ...CRITICAL FIRE WEATHER CONDITIONS TODAY ACROSS NORTHERN IOWA... .THE COMBINATION OF LOW RELATIVE HUMIDITY...ABNORMALLY DRY CONDITIONS AND STRONG SOUTHWEST WINDS TODAY WILL RESULT IN EXTREME FIRE WEATHER CONDITIONS. IAZ027-037-046>048-302315- /O.EXA.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ BUTLER-HARDIN-GREENE-BOONE-STORY- 1002 AM CDT THU AUG 30 2012 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM CDT 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 UNTIL 8 PM CDT THIS EVENING. * TIMING OR SHORT TERM TRENDS...THIS AFTERNOON AND EARLY EVENING. * WIND...SOUTHWEST WINDS AT 20 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...15 TO 25 PERCENT. * FUEL...FIELD CROPS ARE NEARLY CURED AND ARE HIGHLY COMBUSTIBLE WHICH WILL LEAD TO RAPID FIRE GROWTH TODAY. IN ADDITION...THE DRYING OF GRASSES IS WELL AHEAD OF SCHEDULE DUE TO THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...FIRES WILL EXPERIENCE RAPIDLY FIRE GROWTH AND WILL BE VERY DIFFICULT TO CONTAIN TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ IAZ004>007-015>017-023>026-033>036-044-045-302315- /O.CON.KDMX.FW.W.0002.120830T1700Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-SAC-CALHOUN-WEBSTER-HAMILTON- CRAWFORD-CARROLL- 1002 AM CDT THU AUG 30 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS.... * TIMING OR SHORT TERM TRENDS...THIS AFTERNOON AND EARLY EVENING. * WIND...SOUTHWEST WINDS AT 20 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...15 TO 25 PERCENT. * FUEL...FIELD CROPS ARE NEARLY CURED AND ARE HIGHLY COMBUSTIBLE WHICH WILL LEAD TO RAPID FIRE GROWTH TODAY. IN ADDITION...THE DRYING OF GRASSES IS WELL AHEAD OF SCHEDULE DUE TO THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...FIRES WILL EXPERIENCE RAPIDLY FIRE GROWTH AND WILL BE VERY DIFFICULT TO CONTAIN TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
157 WWUS83 KDMX 302038 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 338 PM CDT THU AUG 30 2012 ...CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH EARLY EVENING ACROSS NORTHERN IOWA... .THE COMBINATION OF LOW RELATIVE HUMIDITY...ABNORMALLY DRY CONDITIONS AND STRONG SOUTHWEST WINDS WILL RESULT IN EXTREME FIRE WEATHER CONDITIONS THROUGH EARLY THIS EVENING. IAZ004>007-015>017-023>027-033>037-044>048-310100- /O.CON.KDMX.FW.W.0002.000000T0000Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-SAC-CALHOUN-WEBSTER- HAMILTON-HARDIN-CRAWFORD-CARROLL-GREENE-BOONE-STORY- 338 PM CDT THU AUG 30 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR EXTREME FIRE CONDITIONS.... * TIMING OR SHORT TERM TRENDS...THIS AFTERNOON AND EARLY EVENING. * WIND...SOUTHWEST WINDS AT 20 TO 25 MPH WITH GUSTS OF 30 TO 35 MPH. * RELATIVE HUMIDITY...15 TO 25 PERCENT. * FUEL...FIELD CROPS ARE NEARLY CURED AND ARE HIGHLY COMBUSTIBLE WHICH WILL LEAD TO RAPID FIRE GROWTH TODAY. IN ADDITION...THE DRYING OF GRASSES IS WELL AHEAD OF SCHEDULE DUE TO THE HOT AND DRY CONDITIONS THIS SUMMER. * IMPACTS...FIRES WILL EXPERIENCE RAPIDLY FIRE GROWTH AND WILL BE VERY DIFFICULT TO CONTAIN TODAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE FORECAST. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
355 WWUS83 KDMX 310003 RFWDMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE DES MOINES IA 703 PM CDT THU AUG 30 2012 ...RED FLAG WARNING CANCELLED... .A COLD FRONT ENTERING NORTHWEST IOWA WILL PUSH SOUTHEAST AND STALL EAST TO WEST ACROSS NORTHERN IOWA TONIGHT. WINDS WILL REMAIN LIGHT THROUGH THE REST OF TONIGHT... IAZ004>007-015>017-023>027-033>037-044>048-310115- /O.CAN.KDMX.FW.W.0002.000000T0000Z-120831T0100Z/ EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO- POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-SAC-CALHOUN-WEBSTER- HAMILTON-HARDIN-CRAWFORD-CARROLL-GREENE-BOONE-STORY- 703 PM CDT THU AUG 30 2012 ...RED FLAG WARNING IS CANCELLED FOR EXTREME FIRE CONDITIONS.... THE NATIONAL WEATHER SERVICE IN DES MOINES HAS CANCELLED THE RED FLAG WARNING. WINDS HAVE DIMINISHED TO 8 TO 15 MPH ACROSS THE AREA. IN ADDITION RELATIVE HUMIDITY HAS INCREASED TO 25 TO 35 PERCENT. $$
Nearby
Red Flag Warnings in Iowa, 2012Every red flag warning in 2012
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.