Alert archive / Minnesota / Red Flag Warnings in 2021

Red Flag Warning 6, NWS Duluth, MN

June 4, 20217 counties in Minnesota

NWS Duluth, MN issued this red flag warning at Jun 4, 2021, 3:26 AM CDT for 7 counties in Minnesota. It took effect at Jun 4, 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
Jun 4, 2021, 3:26 AM CDT (08:26 UTC)
In effect from
Jun 4, 2021, 12:00 PM CDT
Expired
Jun 4, 2021, 9:00 PM CDT
In force
9 hr
Issued by
NWS Duluth, MN

Counties Cass County, MN, Cook County, MN, Crow Wing County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Saint Louis County, MN

The radar

The Duluth radar (KDLH), 85 km from the middle of the area, began a volume at 08:32 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 00:00Z, 8.4 hours before the alert went out and 129 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.

Skew-T log-pSkew-T log-p diagram, International Fa, MN at 00:00Z on 2021-06-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2021-06-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2046 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
80 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

966 
WWUS83 KDLH 040826
RFWDLH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Duluth MN
326 AM CDT Fri Jun 4 2021

...CRITICAL FIRE WEATHER CONDITIONS TODAY...

.Critical fire weather conditions are expected this afternoon and
early evening across portions of northeast Minnesota. 
Temperatures well above normal are forecast, with highs from 90 to
96 degrees. Deep mixing is expected which will allow winds to
become gusty in the afternoon. Gusts will likely 20 to 25 MPH with
some occasionally higher.  Dry air in the low levels is also 
likely to reduce relative humidities from 20 to 30 percent. The
highest wind is expected over far northern Itasca, Koochiching,
and far northern St. Louis Counties.

MNZ010>012-018-019-025-026-033-034-041730-
/O.UPG.KDLH.FW.A.0003.210604T1700Z-210605T0200Z/
/O.NEW.KDLH.FW.W.0006.210604T1700Z-210605T0200Z/
Koochiching-North St. Louis-Northern Cook and Lake-North Itasca-
Central St. Louis-North Cass-South Itasca-South Cass-Crow Wing-
326 AM CDT Fri Jun 4 2021

...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 9 PM CDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR 
PORTIONS OF NORTHEAST MINNESOTA...

The National Weather Service in Duluth has issued a Red Flag
Warning for wind and low relative humidity, which is in effect
from noon today to 9 PM CDT this evening. The Fire Weather Watch
is no longer in effect.

* AFFECTED AREA...In Minnesota, Koochiching, North St. Louis, 
  Northern Cook and Lake, North Itasca, Central St. Louis, North 
  Cass, South Itasca, South Cass and Crow Wing.

* WINDS...Southwest 10 to 15 mph with gusts up to 25 mph. A few
  gusts around 30 mph are possible, especially toward Koochiching
  County.

* RELATIVE HUMIDITY...20 to 28 percent.

* TEMPERATURES...In the upper 80s to mid 90s.

* IMPACTS...These conditions are supportive of rapid fire growth.

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.

&&

$$

Melde
2 follow-up statements
551 
WWUS83 KDLH 042020
RFWDLH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Duluth MN
320 PM CDT Fri Jun 4 2021

...CRITICAL FIRE WEATHER CONDITIONS TODAY...

.Critical fire weather conditions are expected this evening 
across portions of northeast Minnesota. Temperatures well above 
normal are forecast, with highs from 90 to 96 degrees. Winds for
most areas are gusting in the 20 to 25 MPH range, but parts of
Koochiching, Itasca and far northern St. Louis county have had
wind gusts around 30 mph so far this afternoon. Dry air in the 
low levels has reduced relative humidities to between 18 and 25 
percent. 

MNZ010>012-018-019-025-026-033-034-050200-
/O.CON.KDLH.FW.W.0006.000000T0000Z-210605T0200Z/
Koochiching-North St. Louis-Northern Cook and Lake-North Itasca-
Central St. Louis-North Cass-South Itasca-South Cass-Crow Wing-
320 PM CDT Fri Jun 4 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM CDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY AND GUSTY WINDS FOR PORTIONS
OF NORTHEAST MINNESOTA...

* AFFECTED AREA...In Minnesota, Koochiching, North St. Louis, 
  Northern Cook and Lake, North Itasca, Central St. Louis, North 
  Cass, South Itasca, South Cass and Crow Wing.

* WINDS...Southwest 10 to 15 mph with gusts up to 25 mph.

* RELATIVE HUMIDITY...As low as 18 percent.

* MAXIMUM TEMPERATURES...90 to 96 degrees.

* IMPACTS...These conditions are supportive of rapid fire growth.

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.

&&

$$
973 
WWUS83 KDLH 050159
RFWDLH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Duluth MN
859 PM CDT Fri Jun 4 2021

MNZ010>012-018-019-025-026-033-034-050300-
/O.EXP.KDLH.FW.W.0006.000000T0000Z-210605T0200Z/
Koochiching-North St. Louis-Northern Cook and Lake-North Itasca-
Central St. Louis-North Cass-South Itasca-South Cass-Crow Wing-
859 PM CDT Fri Jun 4 2021

...RED FLAG WARNING WILL EXPIRE AT 9 PM CDT THIS EVENING FOR WIND
AND LOW RELATIVE HUMIDITY FOR PORTIONS OF NORTHEAST MINNESOTA...

Relative humidites have risen above 25 percent and wind speeds
have decreased. The Red Flag Warning is expiring. 

$$

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.