Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 54, NWS Grand Forks, ND

July 19, 2021Benson County, Ramsey County, Towner County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 19, 2021, 6:44 PM CDT for Benson County, Ramsey County, Towner County, North Dakota. It was in force for 46 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: Jul 19, 2021, 6:44 PM CDT (23:44 UTC)
Expired: Jul 19, 2021, 7:30 PM CDT
In force: 46 min
Issued by: NWS Grand Forks, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Benson County, ND, Ramsey County, ND, Towner County, ND

The radar

The Minot AFB radar (KMBX), 112 km from the middle of the area, began a volume at 23:46 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, 6:49 PM CDT	TSTM WND GST 67	7 E Perth, ND	10 METER WIND GUST COURTESY OF NDAWN.
Jul 19, 6:49 PM CDT	TSTM WND GST 67	7 E Perth, ND	PEAK WIND MEASURED AT AN NDAWN STATION AT 10 METERS.
Jul 19, 7:10 PM CDT	TSTM WND GST 56	1 W Cando, ND	PEAK WIND MEASURED AT THE CANDO AIRPORT /K9D7/.
Jul 19, 7:10 PM CDT	TSTM WND GST 56	1 W Cando, ND	WIND GUST REPORTED BY CANDO AIRPORT AWOS.

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, 11.7 hours before the alert went out and 226 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.

785 
WUUS53 KFGF 192344
SVRFGF
NDC005-071-095-200030-
/O.NEW.KFGF.SV.W.0054.210719T2344Z-210720T0030Z/

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

The National Weather Service in Grand Forks has issued a

* Severe Thunderstorm Warning for...
  North central Benson County in northeastern North Dakota...
  Southwestern Towner County in northeastern North Dakota...
  West central Ramsey County in northeastern North Dakota...

* Until 730 PM CDT.

* At 643 PM CDT, a severe thunderstorm was located over Perth, or 51
  miles west of Langdon, moving southeast at 45 mph.

  HAZARD...Ping pong ball size hail and 60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...People and animals outdoors will be injured. Expect hail 
           damage to roofs, siding, windows, and vehicles. Expect 
           wind damage to roofs, siding, and trees.

* This severe thunderstorm will be near...
  Perth around 645 PM CDT.
  Bisbee around 655 PM CDT.
  Cando around 715 PM CDT.

Other locations in the path of this severe thunderstorm include
Considine and Cando.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4880 9952 4888 9928 4828 9889 4815 9931
      4847 9950 4872 9949 4872 9952
TIME...MOT...LOC 2343Z 331DEG 40KT 4874 9950 

HAIL...1.50IN
WIND...60MPH
 
$$

Riddle

2 follow-up statements

841 
WWUS53 KFGF 200009
SVSFGF

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

NDC005-071-095-200030-
/O.CON.KFGF.SV.W.0054.000000T0000Z-210720T0030Z/
Benson ND-Towner ND-Ramsey ND-
709 PM CDT Mon Jul 19 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTH CENTRAL BENSON...SOUTHWESTERN TOWNER AND WEST CENTRAL
RAMSEY COUNTIES...

At 708 PM CDT, a severe thunderstorm was located over Considine, or 
15 miles northwest of Cando, moving southeast at 40 mph.  This storm 
produced 67 mph wind gust at 649 pm at the NDAWN sensor 7 miles east 
of Perth. 

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...
  Considine, Cando, Maza, Churchs Ferry and Penn.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4880 9952 4888 9928 4828 9889 4815 9931
      4847 9950 4872 9949 4872 9952
TIME...MOT...LOC 0008Z 325DEG 34KT 4857 9930 

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

Riddle

870 
WWUS53 KFGF 200030
SVSFGF

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

NDC005-071-095-200040-
/O.EXP.KFGF.SV.W.0054.000000T0000Z-210720T0030Z/
Benson ND-Towner ND-Ramsey ND-
730 PM CDT Mon Jul 19 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL BENSON...
SOUTHWESTERN TOWNER AND WEST CENTRAL RAMSEY COUNTIES HAS EXPIRED...
                
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 has been allowed to expire.  However small
hail and gusty winds are still possible with this thunderstorm.

LAT...LON 4880 9952 4888 9928 4828 9889 4815 9931
      4847 9950 4872 9949 4872 9952
TIME...MOT...LOC 0030Z 331DEG 40KT 4839 9915 

$$

Riddle

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, 12:11 PM CDT	Severe Thunderstorm Warning	FGF	Grand Forks, Griggs, Nelson, Ramsey, Steele, Walsh	64 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

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.