Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 65, NWS Grand Forks, ND

July 25, 2021Wilkin County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 2021, 9:55 PM CDT for Wilkin County, Minnesota. It was in force for 35 min. 3 reports 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 25, 2021, 9:55 PM CDT (02:55 UTC)
Expired
Jul 25, 2021, 10:30 PM CDT
In force
35 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.25 in
Wind
70.0 mph

County Wilkin County, MN

The radar

The Aberdeen radar (KABR), 163 km from the middle of the area, began a volume at 02:55 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 25, 10:10 PM CDTHAIL 1.25Campbell, MNHALF DOLLAR SIZED HAIL PICTURE RELAYED VIA FACEBOOK.
Jul 25, 10:10 PM CDTHAIL 1.5Campbell, MNREPORTS AND PHOTOS POSTED VIA SOCIAL MEDIA.
Jul 25, 10:10 PM CDTHAIL 1.5Campbell, MN1.5 INCH HAIL PICTURE RELAYED BY BROADCAST MEDIA.

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

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 2.9 hours before the alert went out and 198 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, Aberdeen, SD at 00:00Z on 2021-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1771 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, Aberdeen, SD at 00:00Z on 2021-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
1771 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
2015 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.0
Supercell composite
31.3

Open this sounding in Storm Lab

The text

As transmitted.

379 
WUUS53 KFGF 260255
SVRFGF
MNC167-260330-
/O.NEW.KFGF.SV.W.0065.210726T0255Z-210726T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
955 PM CDT Sun Jul 25 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southeastern Wilkin County in west central Minnesota...

* Until 1030 PM CDT.

* At 954 PM CDT, a severe thunderstorm was located over Tenney, or 14
  miles southeast of Wahpeton, moving east at 40 mph.

  HAZARD...70 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* This severe thunderstorm will be near...
  Campbell around 1000 PM CDT.
  Nashua around 1010 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4605 9657 4606 9656 4608 9655 4611 9657
      4612 9656 4615 9658 4617 9627 4602 9627
      4602 9658
TIME...MOT...LOC 0254Z 271DEG 33KT 4608 9649 

HAIL...1.25IN
WIND...70MPH
 
$$

DJR
1 follow-up statement
954 
WWUS53 KFGF 260332
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1032 PM CDT Sun Jul 25 2021

MNC167-260341-
/O.EXP.KFGF.SV.W.0065.000000T0000Z-210726T0330Z/
Wilkin MN-
1032 PM CDT Sun Jul 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WILKIN COUNTY HAS
EXPIRED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been allowed to expire.

LAT...LON 4605 9657 4606 9656 4608 9655 4611 9657
      4612 9656 4615 9658 4617 9627 4602 9627
      4602 9658
TIME...MOT...LOC 0331Z 271DEG 33KT 4607 9603 

$$

DJR

The office that day

Everything else NWS Grand Forks, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 25, 10:26 PM CDTSevere Thunderstorm WarningFGFGrant, Otter Tail18 min
Jul 25, 10:43 PM CDTSpecial Weather StatementFGFGrant32 min
Jul 25, 10:46 PM CDTSpecial Weather StatementFGFGrant29 min
Jul 26, 4:23 PM CDTSpecial Weather StatementFGFBeltrami52 min
Jul 26, 4:30 PM CDTSevere Thunderstorm WarningFGFBeltrami, Clearwater60 min
Jul 26, 5:13 PM CDTTornado Warning Tornado observedFGFBeltrami47 min
Jul 26, 5:32 PM CDTTornado WarningFGFBeltrami43 min
Jul 26, 6:23 PM CDTSpecial Weather StatementFGFHubbard37 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.