Alert archive / Wisconsin / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Green Bay, WI
NWS Green Bay, WI issued this red flag warning at May 1, 2021, 10:50 AM CDT for Portage County, Waushara County, Wood County, Wisconsin. 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, 10:50 AM CDT (15:50 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 Green Bay, WI
Counties Portage County, WI, Waushara County, WI, Wood County, WI
The radar
The Green Bay radar (KGRB), 119 km from the middle of the area, began a volume at 15:50 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, 3.8 hours before the alert went out and 120 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
- 2038 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 248 m²/s²
- 0-3 km storm-relative helicity
- 418 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
182 WWUS83 KGRB 011550 RFWGRB URGENT - FIRE WEATHER MESSAGE National Weather Service Green Bay WI 1050 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. WIZ035-036-045-020000- /O.NEW.KGRB.FW.W.0001.210501T1700Z-210502T0100Z/ Wood-Portage-Waushara- 1050 AM CDT Sat May 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL WISCONSIN... The National Weather Service in Green Bay has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 8 PM CDT this evening. * AFFECTED COUNTIES ARE...Wood...Portage and Waushara. * TIMING...This afternoon and early evening, from noon to 8 pm. * WIND...West-southwest at 10 to 20 mph with gusts up to 35 mph. * HUMIDITY...Minimum values of 20 to 25 percent. * TEMPERATURES...Highs in the lower 80s. * Impacts...Burning restrictions are likely in effect. For more information on burning restrictions...visit the Wisconsin DNR website at dnr.wi.gov/topic/forestfire/restrictions.html and click on the appropriate county. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning is issued when critical fire weather conditions are either occurring now, or are imminent. A combination of strong winds, very low relative humidity, warm temperatures and exceptionally dry fuels will create dangerous wildland fire conditions. Persons are urged to be careful with any activities that could potentially lead to a wildland fire. Campfires, outdoor grills, smoking materials, chain saws, and all- terrain vehicles all have the potential to throw a spark and ignite a dangerous and destructive fire. Please advise the appropriate officials or fire crews in the field of this red flag warning. && $$
1 follow-up statement
560 WWUS83 KGRB 020004 RFWGRB URGENT - FIRE WEATHER MESSAGE National Weather Service Green Bay WI 704 PM CDT Sat May 1 2021 ...CRITICAL FIRE WEATHER CONDITIONS WILL GRADUALLY IMPROVE THIS EVENING... .The critical fire weather conditions will slowly improve this evening as temperatures fall back into the 60s and 70s, winds diminish to less than 10 mph, and relative humidity values climb above 50 percent. WIZ035-036-045-020115- /O.CON.KGRB.FW.W.0001.000000T0000Z-210502T0100Z/ Wood-Portage-Waushara- 704 PM CDT Sat May 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING FOR PORTIONS OF CENTRAL WISCONSIN... * AFFECTED COUNTIES ARE...Wood...Portage and Waushara. * TIMING...Until 8 pm. * WIND...West-southwest diminish to less than 10 mph. * HUMIDITY...Values in the 20 to 30 percent range will climb to above 50 percent this evening. * TEMPERATURES...Highs in the lower 80s. * Impacts...Burning restrictions are likely in effect. For more information on burning restrictions...visit the Wisconsin DNR website at dnr.wi.gov/topic/forestfire/restrictions.html and click on the appropriate county. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning is issued when critical fire weather conditions are either occurring now, or are imminent. A combination of strong winds, very low relative humidity, warm temperatures and exceptionally dry fuels will create dangerous wildland fire conditions. Persons are urged to be careful with any activities that could potentially lead to a wildland fire. Campfires, outdoor grills, smoking materials, chain saws, and all- terrain vehicles all have the potential to throw a spark and ignite a dangerous and destructive fire. Please advise the appropriate officials or fire crews in the field of this red flag warning. && $$ Eckberg
Nearby
Red Flag Warnings in Wisconsin, 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.