Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 35, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 11, 2021, 3:48 AM CDT for 4 counties in North Dakota. It was in force for 57 min. 18 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 11, 2021, 3:48 AM CDT (08:48 UTC)
- Expired
- Jun 11, 2021, 4:45 AM CDT
- In force
- 57 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Barnes County, ND, Cass County, ND, Griggs County, ND, Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 72 km from the middle of the area, began a volume at 08:51 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 11, 3:49 AM CDT | TSTM WND DMG | Wimbledon, ND | GRAIN SILOS DAMAGED; TIME ESTIMATED FROM RADAR. |
| Jun 11, 3:49 AM CDT | TSTM WND GST 80 | Wimbledon, ND | LARGE EMPTY GRAIN BINS AT AN ELEVATOR COMPLEX WERE CAVED IN AND OR COLLAPSED. PEAK WINDS ESTIMATED TO 80 MPH, WITH MULTIPLE LONG DURATION GUSTS. |
| Jun 11, 4:05 AM CDT | TSTM WND GST 58 | 4 W Cooperstown, ND | PEAK WIND MEASURED AT AN NDAWN STATION. |
| Jun 11, 4:05 AM CDT | TSTM WND GST 58 | 4 W Cooperstown, ND | PEAK WIND MEASURED AT AN NDAWN STATION AT 3 METERS. |
| Jun 11, 4:15 AM CDT | TSTM WND GST 81 | 2 Sse Cooperstown, ND | PEAK WIND MEASURED AT THE COOPERSTOWN AIRPORT /KS32/. |
| Jun 11, 4:15 AM CDT | TSTM WND GST 81 | Cooperstown, ND | COOPERSTOWN AP REPORTED GUST OF 81MPH FROM AWOS. |
| Jun 11, 4:15 AM CDT | TSTM WND GST 85 | 7 Sw Finley, ND | PEAK WIND MEASURED AT A PERSONAL WEATHER STATION. |
| Jun 11, 4:15 AM CDT | TSTM WND GST 85 | 8.5 E Cooperstown, ND | |
| Jun 11, 4:24 AM CDT | TSTM WND GST 83 | 5 Nne Luverne, ND | PEAK WI8ND MEASURED AT A PERSONAL WEATHER STATION. |
| Jun 11, 4:24 AM CDT | TSTM WND GST 83 | 5 Nne Luverne, ND | PERSONAL WEATHER STATION. |
| Jun 11, 4:30 AM CDT | TSTM WND GST 57 | 1 Nnw Finley, ND | MESONET STATION 327986 FINLEY ND 1 NNW. |
| Jun 11, 4:37 AM CDT | TSTM WND GST 57 | 1 Nw Ayr, ND | PEAK WIND MEASURED AT 10 METER NDANE SENSOR. |
| Jun 11, 4:37 AM CDT | TSTM WND GST 57 | 1 Nw Ayr, ND | PEAK WIND MEASURED AT 10 METER NDAWN SENSOR. |
| Jun 11, 4:38 AM CDT | TSTM WND GST 58 | 8 N Buffalo, ND | PEAK WIND MEASURED AT AN NDDOT RWIS STATION. |
| Jun 11, 4:40 AM CDT | TSTM WND GST 57 | 5 Ne Hope, ND | MESONET STATION 321686 HOPE ND 5 NE. |
| Jun 11, 4:47 AM CDT | TSTM WND DMG | Finley, ND | LARGE TREE BRANCHES WERE BROKEN DOWN. ONE TREE WAS SNAPPED. |
| Jun 11, 4:47 AM CDT | TSTM WND DMG | Finley, ND | LARGE TREE TRUNCK BROKEN OFF. |
| Jun 11, 4:47 AM CDT | TSTM WND DMG | Finley, ND | LARGE TREE TRUNK BROKEN OFF. |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 11, 1:58 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 8.8 hours before the alert went out and 197 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.
- Mixed-layer CAPE
- 1785 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 2484 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 210 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.8
The text
As transmitted.
731
WUUS53 KFGF 110848
SVRFGF
NDC003-017-039-091-110945-
/O.NEW.KFGF.SV.W.0035.210611T0848Z-210611T0945Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
348 AM CDT Fri Jun 11 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...
Barnes County in southeastern North Dakota...
Steele County in southeastern North Dakota...
* Until 445 AM CDT.
* At 347 AM CDT, severe thunderstorms were located along a line
extending from near Sutton to near Wimbledon to near Urbana, moving
east at 50 mph.
HAZARD...70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Locations impacted include...
Valley City, Cooperstown, Golden Lake, Finley, Hope, Tower City and
Page.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4754 9850 4766 9767 4740 9748 4694 9747
4680 9844 4698 9844 4698 9847 4732 9847
4733 9850
TIME...MOT...LOC 0847Z 250DEG 44KT 4739 9849 4718 9836 4698 9843
HAIL...<.75IN
WIND...70MPH
$$
LynchThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 11, 3:23 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy, Griggs, Nelson, Ramsey, Steele | 67 min |
| Jun 11, 3:36 AM CDT | Special Weather Statement | FGF | Barnes, Griggs, Steele | 54 min |
| Jun 11, 4:07 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Ransom, Richland, Sargent | 38 min |
| Jun 11, 4:11 AM CDT | Special Weather Statement | FGF | Benson, Cavalier, Pembina, Ramsey, Towner, Walsh | 64 min |
| Jun 11, 4:19 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Grand Forks, Nelson, Steele, Traill, Walsh | 56 min |
| Jun 11, 4:28 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Eddy, Griggs, Nelson, Ramsey, Steele | 62 min |
| Jun 11, 4:36 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Nelson, Pembina, Ramsey, Towner, Walsh | 54 min |
| Jun 11, 4:42 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Ransom, Richland, Sargent | 63 min |
| Jun 11, 4:47 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Griggs, Steele | 28 min |
| Jun 11, 5:07 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Grand Forks, Nelson, Steele, Traill, Walsh | 68 min |
| Jun 11, 5:27 AM CDT | Special Weather Statement | FGF | Cavalier, Pembina, Ramsey, Towner, Walsh | 33 min |
| Jun 11, 5:39 AM CDT | Severe Thunderstorm Warning | FGF | Cass, Richland | 66 min |
| Jun 11, 9:57 AM CDT | Wind Advisory | FGF | Barnes, Benson, Cavalier, Eddy, Griggs, Nelson and 4 more | 11 hr |
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.