Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Duluth, MN

July 23, 2021Aitkin County, Cass County, Itasca County, Minnesota

NWS Duluth, MN issued this severe thunderstorm warning at Jul 23, 2021, 8:02 PM CDT for Aitkin County, Cass County, Itasca County, Minnesota. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 23, 2021, 8:02 PM CDT (01:02 UTC)
Expired
Jul 23, 2021, 8:45 PM CDT
In force
43 min
Issued by
NWS Duluth, MN
Area
Storm-based polygon
Hail
0.88 in
Wind
60.0 mph

Counties Aitkin County, MN, Cass County, MN, Itasca County, MN

The radar

The Duluth radar (KDLH), 126 km from the middle of the area, began a volume at 01:04 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.

What was reported inside it

TimeReportWhereRemark
Jul 23, 8:31 PM CDTTSTM WND DMG3 Ene Hill City, MNNWS METEOROLOGISTS NOTED MULTIPLE TREES DOWN EAST OF HILL CITY ALONG HIGHWAY 200. DELAYED REPORT. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 29 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 23, 4:48 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 1.0 hours before the alert went out and 169 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 2021-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, International Fa, MN at 00:00Z on 2021-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 171 square meters per square second.1939587897Sfc1 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
114 J/kg
Mixed-layer CIN
-292 J/kg
Mixed-layer LCL
1627 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
171 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

732 
WUUS53 KDLH 240102
SVRDLH
MNC001-021-061-240145-
/O.NEW.KDLH.SV.W.0023.210724T0102Z-210724T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Duluth MN
802 PM CDT Fri Jul 23 2021

The National Weather Service in Duluth MN has issued a

* Severe Thunderstorm Warning for...
  South central Itasca County in north central Minnesota...
  Northwestern Aitkin County in east central Minnesota...
  Northeastern Cass County in north central Minnesota...

* Until 845 PM CDT.

* At 801 PM CDT, a severe thunderstorm was located near Remer, or 20
  miles west of Grand Rapids, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts and nickel size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Remer around 810 PM CDT.

Other locations in the path of this severe thunderstorm include Hill
City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on or near one of the many area lakes, get away from the water 
and move indoors or inside a vehicle. If you can hear thunder, you 
are close enough to be struck by lightning. Move to safe shelter 
now! Do not be caught on the water in a thunderstorm.

&&

LAT...LON 4713 9416 4727 9394 4710 9328 4682 9362
TIME...MOT...LOC 0101Z 295DEG 30KT 4714 9394 

HAIL...0.88IN
WIND...60MPH
 
$$

Unruh/Huyck
2 follow-up statements
827 
WWUS53 KDLH 240120
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
820 PM CDT Fri Jul 23 2021

MNC001-021-061-240145-
/O.CON.KDLH.SV.W.0023.000000T0000Z-210724T0145Z/
Itasca MN-Aitkin MN-Cass MN-
820 PM CDT Fri Jul 23 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR SOUTH CENTRAL ITASCA...NORTHWESTERN AITKIN AND EAST CENTRAL CASS
COUNTIES...

At 819 PM CDT, a severe thunderstorm was located 8 miles east of
Remer, or 14 miles southwest of Grand Rapids, moving southeast at 35
mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect damage to roofs, siding, and trees.

Locations impacted include...
  Hill City.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

If on one of the many area lakes, get away from the water and move 
indoors or inside a vehicle. If you can hear thunder, you are close 
enough to be struck by lightning. Move to safe shelter now! Do not 
be caught on the water in a thunderstorm.

&&

LAT...LON 4709 9401 4721 9380 4710 9328 4682 9362
TIME...MOT...LOC 0119Z 295DEG 30KT 4707 9373 

HAIL...0.75IN
WIND...60MPH
 
$$

Unruh/Huyck
463 
WWUS53 KDLH 240142
SVSDLH

Severe Weather Statement
National Weather Service Duluth MN
842 PM CDT Fri Jul 23 2021

MNC001-021-061-240150-
/O.EXP.KDLH.SV.W.0023.000000T0000Z-210724T0145Z/
Itasca MN-Aitkin MN-Cass MN-
842 PM CDT Fri Jul 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL ITASCA...
NORTHWESTERN AITKIN AND EAST CENTRAL CASS COUNTIES WILL EXPIRE AT 845
PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However small 
hail and gusty winds up to 40 mph are still possible with this 
thunderstorm.

A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
north central and east central Minnesota.

LAT...LON 4709 9401 4721 9380 4710 9328 4682 9362
TIME...MOT...LOC 0140Z 295DEG 30KT 4701 9353 

$$

Unruh/Huyck

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Duluth, MN wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 23, 6:58 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Jul 23, 6:58 PM CDT, 1 hour 4 minutes before
Area Forecast Discussion
National Weather Service Duluth MN
658 PM CDT Fri Jul 23 2021

.DISCUSSION...(This evening through Thursday)
Issued at 359 PM CDT Fri Jul 23 2021

Summary: increasing chances of showers and storms are expected
this afternoon and evening, some of which will be strong to
severe. Then, drier conditions are expected for Saturday and
Sunday, which will lead to dangerous fire weather conditions. The
rest of the week will continue to be very warm, with off-and-on
chances of showers and storms.

This afternoon and evening: chances of showers and storms will
increase from west to east as a mid-level shortwave impulse
translates eastward. This shortwave is ahead of a cold front that
will move eastward today through tonight, which could result in
additional convection. Already, some showers and thunderstorms
have formed over north-central Minnesota, with some gusts up to 60
mph already being reported near Birchdale. The environment
continues to be conducive to large hail and damaging wind gusts,
with strengthening upper-level flow, steepening low-level lapse
rates, and mixed-layer CAPE between 1500-2500 J/kg. The threat for
severe storms will continue through the evening hours, and
perhaps into the overnight hours, although instability looks to
diminish by then. Deep-layer shear will continue to be decent,
generally around 30 to 40 knots. Some heavy rainfall will be
possible with this activity as well, with total accumulations
between 0.50" to 1.00" possible, especially over northwest
Wisconsin where the activity is expected to become more
widespread.

The cold front will pass through the region late tonight into
early Saturday morning, which will help usher in drier air behind
it. Northwest winds look to strengthen, with gusts to around 20
to 25 mph. This, coupled with low relative humidities, will lead
to near-critical fire weather conditions for Saturday afternoon
and early evening. The severity of these fire weather conditions
will be dependent on tonight's convection. If rainfall becomes
widespread, this will help tamper down these conditions. Dry
conditions will continue for Sunday, as well, so these near-
critical fire weather conditions may continue into Sunday.

For Monday through Friday next week: very warm conditions will
continue as a broad upper-level ridge will be in place, centered
over the Intermountain West states. Broad thermal ridging will
result in high temperatures into the 80s and even some lower 90s
as well. There will be some off-and-on chances of showers and
thunderstorms for late Monday through Thursday.

&&

.AVIATION...(For the 00Z TAFS through 00Z Saturday evening)
Issued at 658 PM CDT Fri Jul 23 2021

A mix of mostly VFR, with some deteriorated flight conditions due
to scattered showers and thunderstorms over far northern
Minnesota, are anticipated. This storm activity is expected to
continue through the evening hours, and generally make its way to
the southeast. Flight conditions will deteriorate under these
storms, with visibility reductions down to MVFR, and possibly IFR,
under the strongest storms. These storms have already become
severe at times, with wind gusts of up to 60 knots and possibly
some large hail. There could be additional activity late tonight
as a cold front makes its way eastward. Once the cold front passes
through early Saturday morning, drier conditions are expected for
Saturday, but gusty northwest winds are expected, with gusts to
around 20 to 25 knots.

&&

.MARINE...
Issued at 500 PM CDT Fri Jul 23 2021

Increasing chances of showers and thunderstorms are anticipated
across western Lake Superior this evening and overnight as a cold
front makes its way eastward. Some of these storms could be strong
to severe, with strong and erratic wind gusts as high as 50 to 60
knots, large hail the size of half-dollars, heavy rainfall, and
cloud-to-water lightning. The North Shore has the best chances of
seeing strong to severe storms. Before these storms move in this
evening (around 8 to 10 PM or so), northeast winds will continue,
with wave heights only around 2 feet or less. Winds will turn more
westerly Saturday after the cold front passes through, sustained
between 10 to 15 knots, with gusts up to 20 knots. Wave heights
will continue to be around 2 feet or less.

&&

.PRELIMINARY POINT TEMPS/POPS...
DLH  66  87  60  87 /  70  10   0   0
INL  60  83  56  85 /  60   0   0   0
BRD  67  89  59  89 /  50  10   0   0
HYR  67  87  55  88 /  70  30   0   0
ASX  67  88  60  90 /  70  20   0   0

&&

.DLH WATCHES/WARNINGS/ADVISORIES...
WI...Heat Advisory until 7 PM CDT this evening for WIZ006.

MN...Heat Advisory until 7 PM CDT this evening for MNZ038.

LS...None.
&&

DISCUSSION...JTS
AVIATION...JTS
MARINE...JTS
Hazardous weather outlook, Jul 23, 4:07 PM CDT, 3 hours 55 minutes before
Hazardous Weather Outlook
National Weather Service Duluth MN
407 PM CDT Fri Jul 23 2021

MNZ010>012-018>021-025-026-033>037-242115-
Koochiching-North St. Louis-Northern Cook/Northern Lake-
North Itasca-Central St. Louis-Southern Lake/North Shore-
Southern Cook/North Shore-North Cass-South Itasca-South Cass-
Crow Wing-Northern Aitkin-South Aitkin-Carlton/South St. Louis-
407 PM CDT Fri Jul 23 2021

This Hazardous Weather Outlook is for portions of northeast
Minnesota.

.DAY ONE...Tonight

Thunderstorms are expected this evening and some may be strong to
severe. The strongest storms will be capable of hail up to
quarter size and gusts up to 70 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Very low relative humidity values and breezy northwest winds will
lead to near-critical fire weather conditions Saturday afternoon
across much of the Northland.

There is a chance for thunderstorms Monday through Thursday next
week.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters may be needed this evening.

WIZ001>004-007>009-242115-
Douglas-Bayfield-Ashland-Iron-Washburn-Sawyer-Price-
407 PM CDT Fri Jul 23 2021

This Hazardous Weather Outlook is for portions of northwest
Wisconsin.

.DAY ONE...Tonight

Thunderstorms are expected this evening and overnight and some of
the storms may be strong to severe. The strongest storms will be
capable of gusts up to 60 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Very low relative humidity values and breezy northwest winds will
lead to near-critical fire weather conditions Saturday afternoon
across much of the Northland.

There is a chance for thunderstorms Monday through Thursday next
week.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters may be needed the evening.

MNZ038-WIZ006-242115-
Pine-Burnett-
407 PM CDT Fri Jul 23 2021

This Hazardous Weather Outlook is for portions of northeast
Minnesota and northwest Wisconsin.

.DAY ONE...Tonight

Hot and humid conditions will result in heat index values near
100 degrees in parts of Pine and Burnett counties where a Heat
Advisory is in effect through 7PM.

Thunderstorms are expected this evening and overnight and some of
the storms may be strong to severe. The strongest storms will be
capable of gusts up to 60 mph.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Very low relative humidity values and breezy northwest winds will
lead to near-critical fire weather conditions Saturday afternoon
across much of the Northland.

There is a chance for thunderstorms Monday through Thursday next
week.

.SPOTTER INFORMATION STATEMENT...

Skywarn spotters may be needed this evening.

LSZ121-140>148-150-242115-
Bayfield to Oak Point WI-Grand Portage to Grand Marais MN-
Grand Marais to Taconite Harbor MN-
Taconite Harbor to Silver Bay Harbor MN-
Silver Bay Harbor to Two Harbors MN-Two Harbors to Duluth MN-
Duluth MN to Port Wing WI-Port Wing to Sand Island WI-
Sand Island to Bayfield WI-Oak Point to Saxon Harbor WI-
Outer Apostle Islands Beyond 5 NM from Mainland-
407 PM CDT Fri Jul 23 2021

This Hazardous Weather Outlook is for portions of Lake Superior
and the Nearshore waters of western Lake Superior.

.DAY ONE...Tonight

There is a slight risk for a few strong to severe storms across
western Lake Superior this evening and into tonight. The
strongest storms capable of large hail, strong winds up to 40
knots, heavy rainfall which my reduce visibility and frequent
cloud-to-water lightning.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

There is chance for thunderstorms most of next week from Monday
to Thursday.

BJH

More information may be obtained at the following web address:
http://www.weather.gov/duluth (all lower case)

In the hours before

Local storm report, Jul 23, 7:12 PM CDT, 50 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
712 PM CDT FRI JUL 23 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0646 PM     TSTM WND DMG     ELY                     47.90N 91.87W
07/23/2021                   ST. LOUIS          MN   PUBLIC

            PHOTO AND REPORT RECEIVED VIA SOCIAL MEDIA
            OF TREES DOWN AND DAMAGE TO TENTS AT A
            FESTIVAL IN DOWNTOWN ELY. TIME ESTIMATED BY
            RADAR.

&&

BJH
Special weather statement, Jul 23, 7:15 PM CDT, 47 minutes before
Special Weather Statement
National Weather Service Duluth MN
715 PM CDT Fri Jul 23 2021

MNZ019-026-240045-
Central St. Louis-South Itasca-
715 PM CDT Fri Jul 23 2021

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN ITASCA AND
WEST CENTRAL ST. LOUIS COUNTIES...

At 715 PM CDT, strong thunderstorms were along a line extending from
near Keewatin, to Gunn, to Zemple, to near Deer River, and moving
southeast at 20 mph.

Wind gusts up to 45 mph, dime size hail, heavy downpours, and
frequent cloud to ground lightning can be expected with these storms.

These storms will be near...
  Keewatin, Nashwauk, Gunn and Pengilly around 720 PM CDT.
  Warba and Pokegama Lake around 745 PM CDT.

Other locations impacted by these storms include Blackberry, Hart
Lake, Calumet, Swan Lake, Bovey, Goodland, Marble, Silica, Little
Swan and Kelly Lake.

Seek shelter inside a sturdy building and away from windows until
these storms pass. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard topped vehicle.

LAT...LON 4742 9393 4746 9371 4736 9347 4744 9312
      4736 9258 4706 9331 4718 9374 4726 9380
      4728 9377 4729 9379 4730 9377 4731 9384
TIME...MOT...LOC 0015Z 308DEG 19KT 4737 9311 4724 9346 4733 9375 4737
9381

Unruh/Huyck
Local storm report, Jul 23, 7:16 PM CDT, 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
716 PM CDT FRI JUL 23 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 PM     TSTM WND GST     5 WNW TOWER             47.84N 92.36W
07/23/2021  M56 MPH          ST. LOUIS          MN   PUBLIC

            A PERSONAL WEATHER STATION ON THE SOUTH
            SHORE OF LAKE VERMILION REPORTED A GUST TO
            55.5 MPH.

&&

BJH
Local storm report, Jul 23, 7:24 PM CDT, 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
724 PM CDT FRI JUL 23 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0646 PM     TSTM WND DMG     ELY                     47.90N 91.86W
07/23/2021                   ST. LOUIS          MN   FIRE DEPT/RESCUE

            NUMEROUS REPORTS OF TREES DOWN IN ELY WITH
            MULTIPLE ROADS BLOCKED. TIME ESTIMATED BY
            RADAR.

&&

BJH
Special weather statement, Jul 23, 7:33 PM CDT, 29 minutes before
Special Weather Statement
National Weather Service Duluth MN
733 PM CDT Fri Jul 23 2021

MNZ025-240045-
North Cass-
733 PM CDT Fri Jul 23 2021

...A STRONG THUNDERSTORM WILL AFFECT NORTH CENTRAL CASS COUNTY...

At 733 PM CDT, a strong thunderstorm was near Leech Lake, or 13 miles
northeast of Walker, moving southeast at 25 mph.

Wind gusts up to 35 mph, pea size hail, and occasional cloud to
ground lightning can be expected with this storm.

This storm will be near...
  Federal Dam around 740 PM CDT.
  Boy River around 745 PM CDT.

Other locations impacted by this storm include Brevik.

Seek shelter inside a sturdy building and away from windows until
this storm passes. Get off area lakes and seek shelter on shore in a
sturdy shelter or a hard topped vehicle.

LAT...LON 4718 9448 4728 9439 4721 9404 4704 9426
TIME...MOT...LOC 0033Z 301DEG 23KT 4720 9435

Huyck
Local storm report, Jul 23, 7:46 PM CDT, 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DULUTH MN
746 PM CDT FRI JUL 23 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0641 PM     TSTM WND DMG     10 NNW SOUDAN           47.96N 92.31W
07/23/2021                   ST. LOUIS          MN   911 CALL CENTER

            MULTIPLE CANOES FLIPPED OVER FROM
            THUNDERSTORM WIND GUSTS ON TROUT LAKE. CREW
            OF ONE CANOE UNACCOUNTED FOR. ADDITIONAL
            WATER EMERGENCIES ONGOING IN OTHER PORTIONS
            OF THE BOUNDARY WATERS CANOE AREA.

&&

32

The office that day

Everything else NWS Duluth, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 23, 7:15 PM CDTSpecial Weather StatementDLHItasca30 min
Jul 23, 7:30 PM CDTSevere Thunderstorm WarningDLHCook, Lake, Saint Louis37 min
Jul 23, 7:33 PM CDTSpecial Marine WarningDLH87 min
Jul 23, 7:33 PM CDTSpecial Weather StatementDLHCass12 min
Jul 23, 8:12 PM CDTSpecial Weather StatementDLHCarlton18 min
Jul 23, 8:31 PM CDTSpecial Weather StatementDLHCarlton14 min
Jul 23, 8:39 PM CDTSevere Thunderstorm WarningDLHSaint Louis36 min
Jul 23, 8:46 PM CDTSpecial Marine WarningDLH59 min
Jul 23, 8:56 PM CDTSevere Thunderstorm WarningDLHSaint Louis34 min
Jul 23, 9:31 PM CDTSpecial Weather StatementDLHCarlton14 min
Jul 23, 9:43 PM CDTSpecial Weather StatementDLHCarlton32 min
Jul 23, 10:16 PM CDTSpecial Weather StatementDLHCarlton14 min
Jul 23, 10:33 PM CDTSpecial Weather StatementDLHCarlton12 min
Jul 24, 2:34 AM CDTSpecial Weather StatementDLHCrow Wing26 min
Jul 24, 2:36 AM CDTSpecial Weather StatementDLHCass, Itasca24 min
Jul 24, 2:41 AM CDTSpecial Weather StatementDLHChisago34 min
Jul 24, 2:56 AM CDTSpecial Weather StatementDLHCass, Itasca34 min
Jul 24, 3:02 AM CDTSpecial Weather StatementDLHCass, Crow Wing28 min
Jul 24, 3:22 AM CDTSpecial Weather StatementDLH23 min
Jul 24, 3:30 AM CDTSpecial Weather StatementDLHPine30 min
Jul 24, 3:31 AM CDTSpecial Weather StatementDLHAitkin, Crow Wing29 min
Jul 24, 3:32 AM CDTSpecial Weather StatementDLHSaint Louis28 min
Jul 24, 3:41 AM CDTSpecial Weather StatementDLH34 min
Jul 24, 3:56 AM CDTSpecial Weather StatementDLHAitkin, Carlton34 min
Jul 24, 3:58 AM CDTSpecial Weather StatementDLHSaint Louis32 min
Jul 24, 4:11 AM CDTSpecial Weather StatementDLH34 min
Jul 24, 4:26 AM CDTSpecial Weather StatementDLHCarlton, Saint Louis34 min
Jul 24, 4:28 AM CDTSpecial Weather StatementDLH32 min
Jul 24, 4:57 AM CDTSpecial Marine WarningDLH63 min
Jul 24, 5:00 AM CDTSpecial Weather StatementDLHCarlton15 min
Jul 24, 5:07 AM CDTSevere Thunderstorm WarningDLHCarlton, Saint Louis38 min
Jul 24, 5:15 AM CDTSpecial Marine WarningDLH60 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2021Every severe thunderstorm 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.