Alert archive / Iowa / Red Flag Warnings in 2012
Red Flag Warning 1, NWS La Crosse, WI
NWS La Crosse, WI issued this red flag warning at Mar 10, 2012, 5:06 AM CST for 8 counties in Iowa; 7 counties in Minnesota. It took effect at Mar 10, 2012, 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, 2012, 5:06 AM CST (11:06 UTC)
- In effect from
- Mar 10, 2012, 12:00 PM CST
- Expired
- Mar 10, 2012, 6:00 PM CST
- In force
- 6 hr
- Issued by
- NWS La Crosse, WI
Counties Allamakee County, IA, Chickasaw County, IA, Clayton County, IA, Fayette County, IA, Floyd County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Dodge County, MN, Fillmore County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN
The radar
The La Crosse radar (KARX), 85 km from the middle of the area, began a volume at 11:03 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
Minneapolis, MN (KMPX), launched 00:00Z, 11.1 hours before the alert went out and 190 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
- 2306 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 282 m²/s²
- 0-3 km storm-relative helicity
- 667 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
653 WWUS83 KARX 101106 RFWARX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 506 AM CST SAT MAR 10 2012 ...CRITICAL FIRE WEATHER CONDITIONS TODAY... .THE COMBINATION OF STRONG WINDS AND LOW RELATIVE HUMIDITY WILL LEAD TO CRITICAL FIRE WEATHER CONDITIONS TODAY. WINDS WILL BE STRONG THROUGHOUT THE DAY WITH SUSTAINED WINDS OF 17 TO 25 KNOTS AND GUSTS UP TO 40 KNOTS AT TIMES. DEW POINTS WILL DROP THIS AFTERNOON AND CAUSE RELATIVE HUMIDITY TO FALL INTO THE 15 TO 25 PERCENT RANGE. THESE CONDITIONS WILL IMPROVE TONIGHT AS WINDS SUBSIDE AND DEW POINTS INCREASE. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-101915- /O.NEW.KARX.FW.W.0001.120310T1800Z-120311T0000Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- 506 AM CST SAT MAR 10 2012 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM CST THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHEAST MINNESOTA AND NORTHEAST IOWA... THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A RED FLAG WARNING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM NOON TODAY TO 6 PM CST THIS EVENING. * AFFECTED AREA...SOUTHEAST MINNESOTA AND NORTHEAST IOWA. * WINDS...SOUTHWEST 20 TO 30 MPH WITH GUSTS UP TO 40 MPH. * RELATIVE HUMIDITY...AS LOW AS 15 TO 20 PERCENT. * TEMPERATURES...IN THE MID 60S. * IMPACTS...FIRES COULD START VERY EASILY AND SPREAD AT A VERY FAST RATE. 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. && $$ HALBACH
2 follow-up statements
447 WWUS83 KARX 101754 RFWARX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 1154 AM CST SAT MAR 10 2012 ...CRITICAL FIRE WEATHER CONDITIONS TODAY... .STRONG WINDS AND LOW RELATIVE HUMIDITY THROUGH THIS AFTERNOON WILL LEAD TO CRITICAL FIRE WEATHER CONDITIONS. SUSTAINED SOUTHWEST WINDS IN THE 20 TO 25 MPH WITH GUSTS TO 40 MPH CAN BE EXPECTED THROUGH THIS AFTERNOON ALONG WITH RELATIVE HUMIDITY VALUES BOTTOMING OUT IN THE 15 TO 20 PERCENT RANGE. LOOK FOR CONDITIONS TO IMPROVE THIS EVENING AS THE WINDS SUBSIDE AND RELATIVE HUMIDITY VALUES RECOVER. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-110000- /O.CON.KARX.FW.W.0001.120310T1800Z-120311T0000Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- 1154 AM CST SAT MAR 10 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHEAST MINNESOTA AND NORTHEAST IOWA... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING. * AFFECTED AREA...SOUTHEAST MINNESOTA AND NORTHEAST IOWA. * WINDS...SOUTHWEST 20 TO 25 MPH WITH GUSTS UP TO 40 MPH. * RELATIVE HUMIDITY...AS LOW AS 15 TO 20 PERCENT. * TEMPERATURES...IN THE MIDDLE 60S. * IMPACTS...FIRES COULD START VERY EASILY AND SPREAD AT A VERY FAST RATE. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$ DAS
237 WWUS83 KARX 102356 RFWARX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LA CROSSE WI 556 PM CST SAT MAR 10 2012 ...FIRE WEATHER CONDITIONS IMPROVING... .WINDS WILL CONTINUE TO DIMINISH THROUGH THE EARLY EVENING HOURS AS RELATIVE HUMIDITIES RISE. THUS THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 6 PM. IAZ008>011-018-019-029-030-MNZ079-086>088-094>096-110100- /O.EXP.KARX.FW.W.0001.000000T0000Z-120311T0000Z/ MITCHELL-HOWARD-WINNESHIEK-ALLAMAKEE-FLOYD-CHICKASAW-FAYETTE- CLAYTON-WABASHA-DODGE-OLMSTED-WINONA-MOWER-FILLMORE-HOUSTON- 556 PM CST SAT MAR 10 2012 ...RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING FOR SOUTHEAST MINNESOTA AND NORTHEAST IOWA. THE RED FLAG WARNING WILL EXPIRE AT 6 PM CST THIS EVENING. WINDS WILL CONTINUE TO DIMINISH EARLY THIS EVENING WITH RELATIVE HUMIDITIES RISING. THUS THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 6 PM. $$ RABERDING
Nearby
Red Flag Warnings in Iowa, 2012Red Flag Warnings in Minnesota, 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.