Alert archive / Wisconsin / Red Flag Warnings in 2018
Red Flag Warning 2, NWS La Crosse, WI
NWS La Crosse, WI issued this red flag warning at Apr 30, 2018, 9:57 AM CDT for 7 counties in Wisconsin. It took effect at Apr 30, 2018, 11:00 AM 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
- Apr 30, 2018, 9:57 AM CDT (14:57 UTC)
- In effect from
- Apr 30, 2018, 11:00 AM CDT
- Expired
- Apr 30, 2018, 7:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS La Crosse, WI
Counties Adams County, WI, Clark County, WI, Jackson County, WI, Juneau County, WI, La Crosse County, WI, Monroe County, WI, Trempealeau County, WI
The radar
The La Crosse radar (KARX), 58 km from the middle of the area, began a volume at 14:58 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
Green Bay/Straub, WI (KGRB), launched 12:00Z, 3.0 hours before the alert went out and 204 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
- 2654 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 154 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
106 WWUS83 KARX 301457 RFWARX URGENT - FIRE WEATHER MESSAGE National Weather Service La Crosse WI 957 AM CDT Mon Apr 30 2018 ...Critical Fire Weather Conditions Through This Afternoon Into Early This Evening... .Gusty south winds will combine with very low relative humidity resulting in critical fire weather conditions across portions of west central into central Wisconsin through this afternoon. Any fires that start will have the potential to spread quickly and get out of control. WIZ029-033-034-041>044-302300- /O.NEW.KARX.FW.W.0002.180430T1600Z-180501T0000Z/ Clark-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams- 957 AM CDT Mon Apr 30 2018 ...RED FLAG WARNING IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF WEST CENTRAL INTO CENTRAL WISCONSIN... The National Weather Service in La Crosse has issued a Red Flag Warning, which is in effect until 7 PM CDT this evening. * AFFECTED AREA...IN Wisconsin...Clark...Trempealeau... Jackson...La Crosse...Monroe...Juneau...Adams. * TIMING...11 AM through 7 PM. * WIND...Gusty south winds 15 to 20 mph with gusts up to 40 mph. * HUMIDITY...minimum values in the 20 to 25 percent range. * 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. && $$ DAS
2 follow-up statements
903 WWUS83 KARX 302048 RFWARX URGENT - FIRE WEATHER MESSAGE National Weather Service La Crosse WI 348 PM CDT Mon Apr 30 2018 ...Critical Fire Weather Conditions and Extreme Fire Danger Into Early This Evening... .Gusty south winds, combined with very low relative humidity and dry vegetation will result in critical fire weather conditions and extreme fire danger across portions of west central into central Wisconsin into early this evening. Any fires that start will have the potential to spread quickly and get out of control. WIZ029-033-034-041>044-010000- /O.CON.KARX.FW.W.0002.000000T0000Z-180501T0000Z/ Clark-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams- 348 PM CDT Mon Apr 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR PORTIONS OF WEST CENTRAL INTO CENTRAL WISCONSIN... * AFFECTED AREA...IN Wisconsin...Clark...Trempealeau... Jackson...La Crosse...Monroe...Juneau...Adams. * TIMING...Through 7 PM. * WIND...Gusty south winds 15 to 20 mph with gusts up to 40 mph. * HUMIDITY...minimum values in the 20 to 25 percent range. * IMPACTS...any fires that develop will spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ DAS
794 WWUS83 KARX 010008 RFWARX URGENT - FIRE WEATHER MESSAGE National Weather Service La Crosse WI 708 PM CDT Mon Apr 30 2018 ...Near Critical Fire Weather Conditions Early This Evening... .Strong and gusty south winds will combine with relative humidity values in the mid 20s to lower 30s to produce near critical fire weather conditions through 9 PM. WIZ029-033-034-041>044-010115- /O.EXP.KARX.FW.W.0002.000000T0000Z-180501T0000Z/ Clark-Trempealeau-Jackson-La Crosse-Monroe-Juneau-Adams- 708 PM CDT Mon Apr 30 2018 ...RED FLAG WARNING HAS EXPIRED BUT NEAR CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THROUGH 9 PM... Winds will gradually subside this evening and relative humidity values are expected to slowly improve after sunset. However, fire weather conditions will remain at near critical levels through 9 PM. $$ Wetenkamp
Nearby
Red Flag Warnings in Wisconsin, 2018Every red flag warning in 2018
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.