Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 11, NWS Grand Forks, ND

June 7, 20214 counties in North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 7, 2021, 8:02 PM CDT for 4 counties in North Dakota. It was in force for 58 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
Jun 7, 2021, 8:02 PM CDT (01:02 UTC)
Expired
Jun 7, 2021, 9:00 PM CDT
In force
58 min
Issued by
NWS Grand Forks, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Barnes County, ND, Cass County, ND, Griggs County, ND, Steele County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 62 km from the middle of the area, began a volume at 01:05 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
Jun 7, 8:21 PM CDTHAIL 17 Sw Cooperstown, ND

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

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 7, 5:45 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.0 hours before the alert went out and 207 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, Bismarck Municip, ND at 00:00Z on 2021-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1478 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, Bismarck Municip, ND at 00:00Z on 2021-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 square meters per square second.193958Sfc1 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
1478 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
2452 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
0.0
Supercell composite
5.5

Open this sounding in Storm Lab

The text

As transmitted.

241 
WUUS53 KFGF 080102
SVRFGF
NDC003-017-039-091-080200-
/O.NEW.KFGF.SV.W.0011.210608T0102Z-210608T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
802 PM CDT Mon Jun 7 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Northwestern Cass County in southeastern North Dakota...
  Griggs County in southeastern North Dakota...
  Northern Barnes County in southeastern North Dakota...
  Southern Steele County in southeastern North Dakota...

* Until 900 PM CDT.

* At 801 PM CDT, a severe thunderstorm was located near Courtenay, or
  33 miles northwest of Valley City, moving northeast at 40 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Sutton around 810 PM CDT.
  Revere around 815 PM CDT.
  Walum around 820 PM CDT.

Other locations in the path of this severe thunderstorm include
Hannaford and Cooperstown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.

&&

LAT...LON 4746 9850 4767 9825 4767 9814 4727 9745
      4724 9745 4724 9741 4705 9847 4732 9847
      4733 9850
TIME...MOT...LOC 0101Z 245DEG 34KT 4728 9850 

HAIL...1.00IN
WIND...60MPH
 
$$

jr
2 follow-up statements
302 
WWUS53 KFGF 080126
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
826 PM CDT Mon Jun 7 2021

NDC003-017-039-091-080200-
/O.CON.KFGF.SV.W.0011.000000T0000Z-210608T0200Z/
Cass ND-Griggs ND-Barnes ND-Steele ND-
826 PM CDT Mon Jun 7 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR NORTHWESTERN CASS...GRIGGS...NORTHERN BARNES AND SOUTHERN STEELE
COUNTIES...

At 826 PM CDT, a severe thunderstorm was located near Hannaford, or
32 miles north of Valley City, moving northeast at 35 mph.

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

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
  Cooperstown and Blabon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.

&&

LAT...LON 4745 9838 4767 9825 4767 9814 4727 9745
      4724 9745 4724 9741 4709 9835 4732 9832
      4738 9836
TIME...MOT...LOC 0126Z 245DEG 31KT 4737 9821 

HAIL...1.00IN
WIND...60MPH
 
$$

jr
546 
WWUS53 KFGF 080152
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
852 PM CDT Mon Jun 7 2021

NDC003-017-039-091-080200-
/O.EXP.KFGF.SV.W.0011.000000T0000Z-210608T0200Z/
Cass ND-Griggs ND-Barnes ND-Steele ND-
852 PM CDT Mon Jun 7 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CASS...GRIGGS...
NORTHERN BARNES AND SOUTHERN STEELE COUNTIES WILL EXPIRE AT 900 PM
CDT...
        
The storm which prompted the warning has weakened below severe 
limits. Therefore, the warning will be allowed to expire. However 
gusty winds are still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until midnight CDT for
southeastern North Dakota.

Remember, a Severe Thunderstorm Warning still remains in effect 
further south across southern Barnes and southwestern Cass 
counties until 915 PM. 

LAT...LON 4745 9838 4767 9825 4767 9814 4727 9745
      4724 9745 4724 9741 4709 9835 4732 9832
      4738 9836
TIME...MOT...LOC 0150Z 245DEG 34KT 4746 9791 

$$

jr

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:12 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass63 min
Jun 7, 9:09 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass66 min
Jun 7, 9:20 PM CDTSevere Thunderstorm WarningFGFRansom23 min
Jun 7, 10:03 PM CDTSevere Thunderstorm WarningFGFCass, Richland57 min
Jun 7, 10:08 PM CDTSevere Thunderstorm WarningFGFBarnes, Cass, Ransom, Richland67 min
Jun 7, 11:08 PM CDTSpecial Weather StatementFGFRichland52 min
Jun 8, 1:39 AM CDTSevere Thunderstorm WarningFGFBarnes66 min
Jun 8, 2:45 AM CDTSevere Thunderstorm WarningFGFBarnes, Ransom60 min
Jun 8, 3:42 AM CDTSevere Thunderstorm WarningFGFBarnes63 min
Jun 8, 4:12 AM CDTAreal Flood AdvisoryFGFBarnes9 hr
Jun 8, 4:47 AM CDTSevere Thunderstorm WarningFGFRansom58 min
Jun 8, 5:00 AM CDTSevere Thunderstorm WarningFGFBarnes60 min
Jun 8, 5:44 AM CDTSevere Thunderstorm WarningFGFBarnes, Ransom41 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 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.