Alert archive / Minnesota / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Duluth, MN
NWS Duluth, MN issued this red flag warning at May 1, 2021, 10:46 AM CDT for 7 counties in Minnesota. It took effect at May 1, 2021, 12:00 PM CDT. It was in force for 9 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, 10:46 AM CDT (15:46 UTC)
- In effect from
- May 1, 2021, 12:00 PM CDT
- Expired
- May 1, 2021, 9:00 PM CDT
- In force
- 9 hr
- Issued by
- NWS Duluth, MN
Counties Aitkin County, MN, Carlton County, MN, Cass County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Saint Louis County, MN
The radar
The Duluth radar (KDLH), 102 km from the middle of the area, began a volume at 15:45 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
International Fa, MN (KINL), launched 12:00Z, 3.8 hours before the alert went out and 160 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
- 2223 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 344 m²/s²
- 0-3 km storm-relative helicity
- 422 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
401 WWUS83 KDLH 011546 RFWDLH URGENT - FIRE WEATHER MESSAGE National Weather Service Duluth MN 1046 AM CDT Sat May 1 2021 ...LOW RELATIVE HUMIDITY AND GUSTY WINDS WITH WARM TEMPERATURES THIS AFTERNOON AND EVENING FOR MUCH OF CENTRAL AND NORTH-CENTRAL MINNESOTA... .Deep mixing in the wake of a warm front will result in very warm temperatures in the 80s and dry relative humidities between 15 and 25 percent this afternoon. West and west-northwest winds of 10 to 15 mph with gusts of 15 to 25 mph are expected as well. These conditions will persist into this evening. MNZ018-025-026-033>036-020200- /O.NEW.KDLH.FW.W.0004.210501T1700Z-210502T0200Z/ North Itasca-North Cass-South Itasca-South Cass-Crow Wing- Northern Aitkin-South Aitkin- 1046 AM CDT Sat May 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL AND NORTH- CENTRAL MINNESOTA... The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 9 PM CDT this evening. * AFFECTED AREA...In Minnesota, North Itasca, North Cass, South Itasca, South Cass, Crow Wing, Northern Aitkin and South Aitkin. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...Any fires that start will spread quickly. 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. && $$ MNZ010-011-020200- /O.NEW.KDLH.FW.W.0004.210501T1700Z-210502T0200Z/ Koochiching-North St. Louis- 1046 AM CDT Sat May 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF FAR NORTHERN MINNESOTA... The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 9 PM CDT this evening. * AFFECTED AREA...In Minnesota, Koochiching and North St. Louis. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that start will spread quickly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ MNZ019-037-020200- /O.NEW.KDLH.FW.W.0004.210501T1700Z-210502T0200Z/ Central St. Louis-Carlton and South St. Louis- 1046 AM CDT Sat May 1 2021 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY PORTIONS OF NORTHERN AND EAST- CENTRAL MINNESOTA... The National Weather Service in Duluth has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 9 PM CDT this evening. * AFFECTED AREA...In Minnesota, Central St. Louis and Carlton and South St. Louis. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that start will spread quickly. 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. && $$ Huyck
2 follow-up statements
128 WWUS83 KDLH 012028 RFWDLH URGENT - FIRE WEATHER MESSAGE National Weather Service Duluth MN 328 PM CDT Sat May 1 2021 ...LOW RELATIVE HUMIDITY AND GUSTY WINDS WITH WARM TEMPERATURES THIS AFTERNOON AND EVENING FOR MUCH OF CENTRAL AND NORTH-CENTRAL MINNESOTA... .Deep mixing in the wake of a warm front will result in very warm temperatures in the 80s and dry relative humidities between 15 and 25 percent this afternoon. West and west-northwest winds of 10 to 15 mph with gusts of 15 to 25 mph are expected as well. These conditions will persist into this evening. MNZ018-025-026-033>036-020200- /O.CON.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ North Itasca-North Cass-South Itasca-South Cass-Crow Wing- Northern Aitkin-South Aitkin- 328 PM CDT Sat May 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF CENTRAL AND NORTH-CENTRAL MINNESOTA... * AFFECTED AREA...In Minnesota, North Itasca, North Cass, South Itasca, South Cass, Crow Wing, Northern Aitkin and South Aitkin. * WINDS...Northwest 10 to 15 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 19 percent. * IMPACTS...Any fires that start will spread quickly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ MNZ010-011-020200- /O.CON.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ Koochiching-North St. Louis- 328 PM CDT Sat May 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF FAR NORTH- CENTRAL MINNESOTA... * AFFECTED AREA...In Minnesota, Koochiching and North St. Louis. * WINDS...Northwest around 10 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that start will spread quickly. 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. && $$ MNZ019-037-020200- /O.CON.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ Central St. Louis-Carlton and South St. Louis- 328 PM CDT Sat May 1 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EAST-CENTRAL AND NORTHEAST MINNESOTA... * AFFECTED AREA...In Minnesota, Central St. Louis and Carlton and South St. Louis. * WINDS...Northwest around 10 mph with gusts up to 25 mph. * RELATIVE HUMIDITY...As low as 20 percent. * IMPACTS...Any fires that start will spread quickly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Huyck
270 WWUS83 KDLH 020155 RFWDLH URGENT - FIRE WEATHER MESSAGE National Weather Service Duluth MN 855 PM CDT Sat May 1 2021 MNZ018-025-026-033>036-020300- /O.EXP.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ North Itasca-North Cass-South Itasca-South Cass-Crow Wing- Northern Aitkin-South Aitkin- 855 PM CDT Sat May 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTION OF CENTRAL AND NORTH-CENTRAL MINNESOTA... The humidity will continue to slowly increase and winds have already decreased this evening so the Red Flag Warning will expire. $$ MNZ010-011-020300- /O.EXP.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ Koochiching-North St. Louis- 855 PM CDT Sat May 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FAR NORTH-CENTRAL MINNESOTA... The humidity will continue to slowly increase and winds have already decreased this evening so the Red Flag Warning will expire. $$ MNZ019-037-020300- /O.EXP.KDLH.FW.W.0004.000000T0000Z-210502T0200Z/ Central St. Louis-Carlton and South St. Louis- 855 PM CDT Sat May 1 2021 ...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF EAST-CENTRAL AND NORTHEAST MINNESOTA... The humidity will continue to slowly increase and winds have already decreased this evening so the Red Flag Warning will expire. $$ Melde
The office that day
Everything else NWS Duluth, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 3:33 AM CDT | Small Craft Advisory | DLH | 3 days |
Nearby
Red Flag Warnings in Minnesota, 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.