Alert archive / Wisconsin / Red Flag Warnings in 2021
Red Flag Warning 2, NWS La Crosse, WI
NWS La Crosse, WI issued this red flag warning at May 1, 2021, 10:24 AM CDT for 9 counties in Wisconsin; 8 counties in Iowa. It took effect at May 1, 2021, 12:00 PM CDT. It was in force for 8 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
- May 1, 2021, 10:24 AM CDT (15:24 UTC)
- In effect from
- May 1, 2021, 12:00 PM CDT
- Expired
- May 1, 2021, 8:00 PM CDT
- In force
- 8 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, Adams County, WI, Crawford County, WI, Grant County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Richland County, WI, Vernon County, WI
The radar
The La Crosse radar (KARX), 45 km from the middle of the area, began a volume at 15:25 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
Davenport, (KDVN), launched 12:00Z, 3.4 hours before the alert went out and 211 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
- 1790 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 753 m²/s²
- 0-3 km storm-relative helicity
- 840 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
901 WWUS83 KARX 011524 RFWARX URGENT - FIRE WEATHER MESSAGE National Weather Service La Crosse WI 1024 AM CDT Sat May 1 2021 ...Critical Fire Weather Conditions... .The combination of low relative humidity, recent dry weather, and gusty southwest winds will create critical fire weather conditions this afternoon into the early evening. Look for the humidity to drop into a range from 20 to 25 percent with wind gusts of 30 to 40 mph. With these conditions, fires could easily start and spread quickly despite the recent green up of some vegetation. IAZ008>011-018-019-029-030-WIZ034-041>044-053>055-061-012330- /O.NEW.KARX.FW.W.0002.210501T1700Z-210502T0200Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford- Richland-Grant- 1024 AM CDT Sat May 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR NORTHEAST IOWA INTO WESTERN WESTERN WISCONSIN... The National Weather Service in La Crosse has issued a Red Flag Warning, which is in effect until 9 PM CDT this evening. * AFFECTED AREA...IN Iowa...Mitchell...Howard...Winneshiek... Allamakee...Floyd...Chickasaw...Fayette...Clayton. IN Wisconsin...Jackson...La Crosse...Monroe...Juneau...Adams... Vernon...Crawford...Richland...Grant. * TIMING...This afternoon and early evening from Noon to 8 pm. * WIND...Southwest 15 to 25 mph gusting 30 to 40 mph. * HUMIDITY...Minimum values of 20 to 25 percent. * TEMPERATURES...Highs in the middle 80s. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. 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. && $$ 04
2 follow-up statements
456 WWUS83 KARX 011618 AAA RFWARX URGENT - FIRE WEATHER MESSAGE...UPDATED National Weather Service La Crosse WI 1118 AM CDT Sat May 1 2021 ...Critical Fire Weather Conditions... .The combination of low relative humidity, recent dry weather, and gusty southwest winds will create critical fire weather conditions this afternoon into the early evening. Look for the humidity to drop into a range from 20 to 25 percent with wind gusts of 30 to 40 mph. With these conditions, fires could easily start and spread quickly despite the recent green up of some vegetation. IAZ008>011-018-019-029-030-WIZ034-041>044-053>055-061-020030- /O.EXT.KARX.FW.W.0002.210501T1700Z-210502T0100Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford- Richland-Grant- 1118 AM CDT Sat May 1 2021 ...RED FLAG WARNING NOW IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR NORTHEAST IOWA INTO WESTERN WESTERN WISCONSIN...... * AFFECTED AREA...IN Iowa...Mitchell...Howard...Winneshiek... Allamakee...Floyd...Chickasaw...Fayette...Clayton. IN Wisconsin...Jackson...La Crosse...Monroe...Juneau...Adams... Vernon...Crawford...Richland...Grant. * TIMING...This afternoon and early evening from Noon to 8 pm. * WIND...Southwest 15 to 25 mph gusting 30 to 40 mph. * HUMIDITY...Minimum values of 20 to 25 percent. * TEMPERATURES...Highs in the middle 80s. * IMPACTS...any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && Correction to the expiration time of the warning. $$ 04
145 WWUS83 KARX 020053 RFWARX URGENT - FIRE WEATHER MESSAGE National Weather Service La Crosse WI 753 PM CDT Sat May 1 2021 ...Fire Weather Conditions Improving... .Relative humidities were rebounding and winds decreasing at early evening. Thus, the threat for quick starting, rapidly moving fires was lessening. The Red Flag Warning will be allowed to expire. IAZ008>011-018-019-029-030-WIZ034-041>044-053>055-061-020200- /O.EXP.KARX.FW.W.0002.000000T0000Z-210502T0100Z/ Mitchell-Howard-Winneshiek-Allamakee-Floyd-Chickasaw-Fayette- Clayton-Jackson-La Crosse-Monroe-Juneau-Adams-Vernon-Crawford- Richland-Grant- 753 PM CDT Sat May 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FOR NORTHEAST IOWA INTO WESTERN WESTERN WISCONSIN... Relative humidities are increasing and winds decreasing at early evening. Thus, the threat for quick starting, rapidly moving fires is lessening. The Red Flag Warning will be allowed to expire. $$ Rieck
Nearby
Red Flag Warnings in Wisconsin, 2021Red 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.