Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 28, NWS Grand Forks, ND

June 9, 2021Pembina County, Walsh County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 9, 2021, 12:35 PM CDT for Pembina County, Walsh County, North Dakota. It was in force for 40 min. 4 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: Jun 9, 2021, 12:35 PM CDT (17:35 UTC)
Expired: Jun 9, 2021, 1:15 PM CDT
In force: 40 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 50.0 mph

Counties Pembina County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 117 km from the middle of the area, began a volume at 17:36 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

Time	Report	Where	Remark
Jun 9, 12:45 PM CDT	TSTM WND GST 69	2 Wsw Saint Thomas, ND	VIA NDAWN.
Jun 9, 12:45 PM CDT	TSTM WND GST 69	2 Wsw St. Thomas, ND	PEAK WIND MEASURED AT AN NDAWN STATION.
Jun 9, 12:45 PM CDT	HAIL 1	Saint Thomas, ND	TIME ESTIMATED FROM RADAR.
Jun 9, 12:45 PM CDT	HAIL 1	St. Thomas, ND	TIME ESTIMATED BASED ON RADAR.

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

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 5.6 hours before the alert went out and 309 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 6 J/kg
Mixed-layer CIN: -372 J/kg
Mixed-layer LCL: 1424 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: -8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

470 
WUUS53 KFGF 091735
SVRFGF
NDC067-099-091815-
/O.NEW.KFGF.SV.W.0028.210609T1735Z-210609T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1235 PM CDT Wed Jun 9 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  North central Walsh County in northeastern North Dakota...
  South central Pembina County in northeastern North Dakota...

* Until 115 PM CDT.

* At 1234 PM CDT, a severe thunderstorm was located near Hoople, or
  13 miles northwest of Grafton, moving northeast at 40 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  St. Thomas around 1245 PM CDT.
  Glasston around 1250 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, contact your nearest law enforcement
agency. They will send your report to the National Weather Service
office in Grand Forks.

&&

LAT...LON 4845 9763 4861 9777 4878 9753 4857 9727
TIME...MOT...LOC 1734Z 240DEG 33KT 4858 9759 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...<50MPH
 
$$

Hopkins

1 follow-up statement

489 
WWUS53 KFGF 091755
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1255 PM CDT Wed Jun 9 2021

NDC099-091804-
/O.CAN.KFGF.SV.W.0028.000000T0000Z-210609T1815Z/
Walsh ND-
1255 PM CDT Wed Jun 9 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WALSH COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4855 9747 4868 9760 4875 9749 4857 9727
TIME...MOT...LOC 1754Z 240DEG 33KT 4868 9734 

$$

NDC067-091815-
/O.CON.KFGF.SV.W.0028.000000T0000Z-210609T1815Z/
Pembina ND-
1255 PM CDT Wed Jun 9 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR SOUTH CENTRAL PEMBINA COUNTY...

At 1254 PM CDT, a severe thunderstorm was located near Glasston, or
18 miles north of Grafton, moving northeast at 40 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of south
central Pembina County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Grand Forks.

&&

LAT...LON 4855 9747 4868 9760 4875 9749 4857 9727
TIME...MOT...LOC 1754Z 240DEG 33KT 4868 9734 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...<50MPH
 
$$

Hopkins

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 4:35 AM CDT	Special Weather Statement	FGF	Pembina	55 min
Jun 9, 12:47 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	28 min
Jun 9, 12:59 PM CDT	Severe Thunderstorm Warning	FGF	Pembina	17 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2021 Every 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.