Alert archive / Minnesota / Red Flag Warnings in 2021
Red Flag Warning 5, NWS Twin Cities, MN
NWS Twin Cities, MN issued this red flag warning at Jun 18, 2021, 3:21 AM CDT for 26 counties in Minnesota; 4 counties in Wisconsin. It took effect at Jun 18, 2021, 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
- Jun 18, 2021, 3:21 AM CDT (08:21 UTC)
- In effect from
- Jun 18, 2021, 12:00 PM CDT
- Expired
- Jun 18, 2021, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Twin Cities, MN
All 30 counties
Anoka County, MN, Benton County, MN, Carver County, MN, Chippewa County, MN, Chisago County, MN, Douglas County, MN, Hennepin County, MN, Isanti County, MN, Kanabec County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, McLeod County, MN, Meeker County, MN, Mille Lacs County, MN, Morrison County, MN, Pope County, MN, Ramsey County, MN, Renville County, MN, Sherburne County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Todd County, MN, Washington County, MN, Wright County, MN, Yellow Medicine County, MN, Barron County, WI, Polk County, WI, Rusk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 08:22 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, 8.4 hours before the alert went out and 66 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
- 61 J/kg
- Mixed-layer CIN
- -387 J/kg
- Mixed-layer LCL
- 1555 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -13 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
127 WWUS83 KMPX 180821 RFWMPX URGENT - FIRE WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 321 AM CDT Fri Jun 18 2021 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THIS AFTERNOON AND EVENING ACROSS MUCH OF CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN DUE TO VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS... .West winds 15 to 20 mph with gusts around 30 mph, afternoon humidity around 20 percent, and the ongoing drought, will result in critical fire weather conditions Friday afternoon. MNZ041>045-047>066-068-181630- /O.UPG.KMPX.FW.A.0003.210618T1700Z-210619T0000Z/ /O.NEW.KMPX.FW.W.0005.210618T1700Z-210619T0000Z/ Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns- Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa- Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Carver- 321 AM CDT Fri Jun 18 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH OF CENTRAL MINNESOTA... The National Weather Service in Twin Cities/Chanhassen has issued a Red Flag Warning, which is in effect from noon today to 7 PM CDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Much of central Minnesota. * WIND...West 15 to 20 mph with frequent gusts around 30 mph. * HUMIDITY...Around 20 percent. * 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. && $$ WIZ014>016-023-181630- /O.UPG.KMPX.FW.A.0003.210618T1700Z-210619T0000Z/ /O.NEW.KMPX.FW.W.0005.210618T1700Z-210619T0000Z/ Polk-Barron-Rusk-St. Croix- 321 AM CDT Fri Jun 18 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH AND WEST CENTRAL WISCONSIN... The National Weather Service in Twin Cities/Chanhassen has issued a Red Flag Warning, which is in effect from noon today to 7 PM CDT this evening. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Polk, Barron, Rusk, and St Croix counties. * WIND...West 15 to 20 mph with frequent gusts around 30 mph. * HUMIDITY...Around 20 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
2 follow-up statements
842 WWUS83 KMPX 182216 RFWMPX URGENT - FIRE WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 516 PM CDT Fri Jun 18 2021 ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THIS AFTERNOON AND EVENING ACROSS MUCH OF CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN DUE TO VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS... .West winds 15 to 20 mph with gusts around 30 mph, afternoon humidity between 10 to 20 percent, and the ongoing drought, will continue to result in dangerous fire conditions into early this evening. MNZ041>045-047>066-068-190000- /O.CON.KMPX.FW.W.0005.000000T0000Z-210619T0000Z/ Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns- Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa- Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Carver- 516 PM CDT Fri Jun 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH OF CENTRAL MINNESOTA... * AFFECTED AREA...Much of central Minnesota. * WIND...West 15 to 20 mph with frequent gusts around 30 mph. * HUMIDITY...10 to 20 percent. * 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. && $$ WIZ014>016-023-190000- /O.CON.KMPX.FW.W.0005.000000T0000Z-210619T0000Z/ Polk-Barron-Rusk-St. Croix- 516 PM CDT Fri Jun 18 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH AND WEST CENTRAL WISCONSIN... * AFFECTED AREA...Polk, Barron, Rusk, and St Croix counties. * WIND...West 15 to 20 mph with frequent gusts around 30 mph. * HUMIDITY...15 to 20 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Borghoff
104 WWUS83 KMPX 182359 RFWMPX URGENT - FIRE WEATHER MESSAGE National Weather Service Twin Cities/Chanhassen MN 659 PM CDT Fri Jun 18 2021 MNZ041>045-047>066-068-190100- /O.EXP.KMPX.FW.W.0005.000000T0000Z-210619T0000Z/ Douglas-Todd-Morrison-Mille Lacs-Kanabec-Stevens-Pope-Stearns- Benton-Sherburne-Isanti-Chisago-Lac Qui Parle-Swift-Chippewa- Kandiyohi-Meeker-Wright-Hennepin-Anoka-Ramsey-Washington- Yellow Medicine-Renville-McLeod-Carver- 659 PM CDT Fri Jun 18 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH OF CENTRAL MINNESOTA... Winds are starting to diminish with scattered showers developing north of I-94, therefore the warning will be allowed to expire. $$ WIZ014>016-023-190100- /O.EXP.KMPX.FW.W.0005.000000T0000Z-210619T0000Z/ Polk-Barron-Rusk-St. Croix- 659 PM CDT Fri Jun 18 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM CDT THIS EVENING FOR VERY LOW RELATIVE HUMIDITY AND BREEZY WINDS OVER MUCH AND WEST CENTRAL WISCONSIN... Winds are starting to diminish, therefore the warning will be allowed to expire. $$ Borghoff
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 17, 7:02 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Rice | 58 min |
| Jun 17, 7:06 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Scott, Sibley | 42 min |
| Jun 17, 7:41 PM CDT | Severe Thunderstorm Warning | MPX | Nicollet, Sibley | 26 min |
| Jun 17, 7:44 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 32 min |
| Jun 17, 7:50 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 55 min |
| Jun 17, 8:00 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue | 45 min |
| Jun 17, 8:28 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 34 min |
| Jun 17, 8:34 PM CDT | Severe Thunderstorm Warning | MPX | Dunn, Eau Claire, Pepin | 56 min |
Nearby
Red Flag Warnings in Minnesota, 2021Red 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.