Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 50, NWS Grand Forks, ND

July 19, 20216 counties in North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 19, 2021, 12:11 PM CDT for 6 counties in North Dakota. It was in force for 64 min. 10 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 19, 2021, 12:11 PM CDT (17:11 UTC)
Expired: Jul 19, 2021, 1:15 PM CDT
In force: 64 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Ramsey County, ND, Steele County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 73 km from the middle of the area, began a volume at 17:11 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
Jul 19, 12:20 PM CDT	TSTM WND GST 50	11 Se Petersburg, ND
Jul 19, 12:55 PM CDT	TSTM WND GST 55	2 E Logan Center, ND	MEASURED 55 MPH GUST...10 METER SENSOR...AT NDAWN STATION LOGAN CENTER 2 E.
Jul 19, 12:55 PM CDT	TSTM WND GST 55	2 E Logan Center, ND	MEASURED 55 MPH GUST...10 M SENSOR AT NDAWN STATION LOGAN CENTER 2 E.
Jul 19, 12:57 PM CDT	TSTM WND GST 55	2 E Logan Center, ND	MEASURED 55 MPH GUST...10 METER SENSOR...AT NDAWN STATION LOGAN CENTER 2 E.
Jul 19, 1:05 PM CDT	TSTM WND GST 65	Kempton, ND	CORRECTS PREVIOUS TSTM WND GST REPORT FROM KEMPTON. CORRECTS PREVIOUS TSTM WND GST REPORT FROM KEMPTON. ESTIMATED 60 TO 70 MPH WIND GUST.
Jul 19, 1:05 PM CDT	TSTM WND GST 65	Kempton, ND	CORRECTS PREVIOUS TSTM WND GST REPORT FROM KEMPTON. ESTIMATED 60 TO 70 MPH WIND GUST.
Jul 19, 1:05 PM CDT	TSTM WND GST 70	Kempton, ND	ESTIMATED 60 TO 70 MPH WIND GUST.
Jul 19, 1:10 PM CDT	TSTM WND GST 57	6 Se Kempton, ND	MEASURED 57 MPH GUST AT AN NDAWN STATION AT 3 METERS.
Jul 19, 1:10 PM CDT	TSTM WND GST 57	6 Se Kempton, ND	MEASURED 57 MPH GUST AT NDAWN STATION KEMPTON 6 SE.
Jul 19, 1:18 PM CDT	TSTM WND GST 65	Kempton, ND	ESTIMATED 60 TO 70 MPH WIND GUST.

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, 5.2 hours before the alert went out and 233 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: 1332 J/kg
Mixed-layer CIN: -233 J/kg
Mixed-layer LCL: 1421 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: 49 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

626 
WUUS53 KFGF 191711
SVRFGF
NDC035-039-063-071-091-099-191815-
/O.NEW.KFGF.SV.W.0050.210719T1711Z-210719T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
1211 PM CDT Mon Jul 19 2021

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  Southwestern Grand Forks County in northeastern North Dakota...
  Nelson County in northeastern North Dakota...
  Northeastern Griggs County in southeastern North Dakota...
  Southeastern Ramsey County in northeastern North Dakota...
  Southwestern Walsh County in northeastern North Dakota...
  Northwestern Steele County in southeastern North Dakota...

* Until 115 PM CDT.

* At 1210 PM CDT, a severe thunderstorm was located near Michigan, or
  34 miles east of Devils Lake, 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...
  Petersburg around 1215 PM CDT.

Other locations in the path of this severe thunderstorm include Logan
Center and Northwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4802 9858 4827 9810 4778 9723 4747 9807
TIME...MOT...LOC 1710Z 310DEG 32KT 4796 9816 

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

JR

1 follow-up statement

722 
WWUS53 KFGF 191745
SVSFGF

Severe Weather Statement
National Weather Service Grand Forks ND
1245 PM CDT Mon Jul 19 2021

NDC071-099-191755-
/O.CAN.KFGF.SV.W.0050.000000T0000Z-210719T1815Z/
Ramsey ND-Walsh ND-
1245 PM CDT Mon Jul 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN RAMSEY AND
SOUTHWESTERN WALSH COUNTIES IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4812 9783 4778 9723 4747 9807 4796 9852
      4799 9853
TIME...MOT...LOC 1745Z 310DEG 32KT 4776 9781 

$$

NDC035-039-063-091-191815-
/O.CON.KFGF.SV.W.0050.000000T0000Z-210719T1815Z/
Grand Forks ND-Nelson ND-Griggs ND-Steele ND-
1245 PM CDT Mon Jul 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 115 PM CDT
FOR SOUTHWESTERN GRAND FORKS...NELSON...NORTHEASTERN GRIGGS AND
NORTHWESTERN STEELE COUNTIES...

At 1245 PM CDT, a severe thunderstorm was located near Logan Center,
or 36 miles west of Grand Forks, 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.

Locations impacted include...
  Northwood.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4812 9783 4778 9723 4747 9807 4796 9852
      4799 9853
TIME...MOT...LOC 1745Z 310DEG 32KT 4776 9781 

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

JR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 10:55 AM CDT	Special Weather Statement	FGF	Ramsey	65 min
Jul 19, 11:28 AM CDT	Severe Thunderstorm Warning	FGF	Benson, Grand Forks, Nelson, Ramsey, Walsh	62 min
Jul 19, 1:02 PM CDT	Special Weather Statement	FGF	Grand Forks, Steele, Traill	58 min
Jul 19, 1:32 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Grand Forks, Steele, Traill	58 min
Jul 19, 2:27 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Richland, Traill	63 min
Jul 19, 3:13 PM CDT	Severe Thunderstorm Warning	FGF	Cass, Ransom, Richland, Sargent	62 min
Jul 19, 6:44 PM CDT	Severe Thunderstorm Warning	FGF	Benson, Ramsey, Towner	46 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.