Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 37, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 11, 2021, 4:19 AM CDT for 6 counties in North Dakota; 4 counties in Minnesota. It was in force for 56 min. 25 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, 4:19 AM CDT (09:19 UTC)
- Expired
- Jun 11, 2021, 5:15 AM CDT
- In force
- 56 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 80.0 mph
Counties Clay County, MN, Marshall County, MN, Norman County, MN, Polk County, MN, Cass County, ND, Grand Forks County, ND, Nelson County, ND, Steele County, ND, Traill County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 24 km from the middle of the area, began a volume at 09:23 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, 4:36 AM CDT | TSTM WND GST 62 | 2 E Logan Center, ND | PEAK WIND MEASURE AT 10 METER NDAWN SENSOR. |
| Jun 11, 4:36 AM CDT | TSTM WND GST 62 | 2 E Logan Center, ND | PEAK WIND MEASURED AT AN NDAWN STATION AT 10 METERS. |
| 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 56 | 2 E Logan Center, ND | MESONET STATION 325332 LOGAN CENTER ND 2 E. |
| Jun 11, 4:40 AM CDT | TSTM WND GST 57 | 5 Ne Hope, ND | MESONET STATION 321686 HOPE ND 5 NE. |
| Jun 11, 4:45 AM CDT | TSTM WND DMG | Portland, ND | TREE BRANCHES TOPPLED AND PARTIALLY UPROOTED. TIME ESTIMATED FROM RADAR AND RELAYED VIA SOCIAL MEDIA. |
| Jun 11, 4:45 AM CDT | TSTM WND DMG | Portland, ND | LARGE TREE BRANCHES BROKEN DOWN. TREES PARTIALY UPROOTED. REPORT AND PHOTO POSTED VIA SOCIAL MEDIA. |
| Jun 11, 4:56 AM CDT | TSTM WND GST 58 | 2 E Mayville, ND | 58 MPH GUST REPORTED BY NDAWN 2E OF MAYVILLE ND. |
| Jun 11, 4:56 AM CDT | TSTM WND GST 58 | 2 E Mayville, ND | PEAK WIND MEASURED AT AN NDAWN STATION AT 3 METERS. |
| Jun 11, 5:02 AM CDT | TSTM WND DMG | Buxton, ND | LARGE BRANCHES BROKEN DOWN. TIME ESTIMATED BASED ON RADAR. |
| Jun 11, 5:02 AM CDT | TSTM WND DMG | Buxton, ND | LARGE TREE BRANCHES DOWN; TIME ESTIMATED FROM RADAR. |
| Jun 11, 5:07 AM CDT | TSTM WND DMG | Reynolds, ND | DOWNED TREES AND POWER LINES; POWER OUT IN REYNOLDS; TIME ESTIMATED FROM RADAR. |
| Jun 11, 5:07 AM CDT | TSTM WND DMG | Reynolds, ND | DOWNED TREES AND POWER LINES. TIME ESTIMATED BASED ON RADAR. |
| Jun 11, 5:10 AM CDT | HAIL 1.25 | Argusville, ND | PHOTO AND REPORT POSTED VIA SOCIAL MEDIA. |
| Jun 11, 5:10 AM CDT | HAIL 1.25 | Argusville, ND | TIME ESTIMATED FROM RADAR. VIA TWITTER. |
| Jun 11, 5:13 AM CDT | TSTM WND GST 56 | 8 W Ada, MN | PEAK WIND MEASURED AT A MNDOT RWIS STATION. |
| Jun 11, 5:13 AM CDT | TSTM WND GST 62 | 3 Ne Blanchard, ND | PEAK WIND MEASURED AT A PERSONAL WEATHER STATION. |
| Jun 11, 5:15 AM CDT | TSTM WND GST 59 | 6 E Perley, MN | PEAK WIND MEASURED AT AN NDAN STATION. |
| Jun 11, 5:15 AM CDT | TSTM WND GST 59 | 6 E Perley, MN | PEAK WIND MEASURED AT AN NDAWN STATION AT 3 METERS. |
| Jun 11, 5:19 AM CDT | TSTM WND DMG | Fisher, MN | FIVE TREES BLOWN DOWN IN A YARD. TIME ESTIMATED BASED ON RADAR. |
| Jun 11, 5:19 AM CDT | TSTM WND DMG | Fisher, MN | FIVE TREES DOWN, ONE PARTIALLY UPROOTED. TIME ESTIMATED FROM RADAR. |
| Jun 11, 5:22 AM CDT | TSTM WND GST 63 | 5 Wnw Grand Forks, ND | PEAK WIND MEASURED AT THE GRAND FORKS AIRPORT /KGFK/. |
| Jun 11, 5:22 AM CDT | TSTM WND GST 63 | Grand Forks, ND | AP IN GRAND FORKS VIA ASOS REPORTED 63MPH GUST. |
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, 9.3 hours before the alert went out and 289 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.
592
WUUS53 KFGF 110919
SVRFGF
MNC027-089-107-119-NDC017-035-063-091-097-099-111015-
/O.NEW.KFGF.SV.W.0037.210611T0919Z-210611T1015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
419 AM CDT Fri Jun 11 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Western Marshall County in northwestern Minnesota...
Northern Clay County in northwestern Minnesota...
Norman County in northwestern Minnesota...
Western Polk County in northwestern Minnesota...
Grand Forks County in northeastern North Dakota...
Eastern Nelson County in northeastern North Dakota...
Northern Cass County in southeastern North Dakota...
Traill County in southeastern North Dakota...
Southern Walsh County in northeastern North Dakota...
Northeastern Steele County in southeastern North Dakota...
* Until 515 AM CDT.
* At 419 AM CDT, severe thunderstorms were located along a line
extending from Mapes to 7 miles north of Oriska, moving east at 70
mph.
These are very dangerous storms.
HAZARD...80 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be heavily damaged. Expect
considerable damage to roofs, windows, and vehicles.
Extensive tree damage and power outages are likely.
* Locations impacted include...
Grand Forks, East Grand Forks, Crookston, Grand Forks AFB,
Mayville, Ada and Hillsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4715 9616 4715 9619 4711 9620 4693 9752
4745 9772 4762 9795 4817 9839 4854 9688
TIME...MOT...LOC 0919Z 256DEG 63KT 4804 9823 4703 9774
HAIL...<.75IN
WIND...80MPH
$$
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, 3:48 AM CDT | Severe Thunderstorm Warning | FGF | Barnes, Cass, Griggs, Steele | 57 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, 4:28 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 |
| Jun 11, 6:07 AM CDT | Special Weather Statement | FGF | Clearwater, Mahnomen, Marshall, Norman, Pennington, Polk and 1 more | 68 min |
| Jun 11, 6:39 AM CDT | Special Weather Statement | FGF | Becker, Grant, Hubbard, Otter Tail, Wadena | 66 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2021Severe Thunderstorm Warnings in Minnesota, 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.