Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 117, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 16, 2021, 1:59 AM CDT for 5 counties in Minnesota. It was in force for 49 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Sep 16, 2021, 1:59 AM CDT (06:59 UTC)
- Expired
- Sep 16, 2021, 2:48 AM CDT
- In force
- 49 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Beltrami County, MN, Clearwater County, MN, Hubbard County, MN, Mahnomen County, MN, Polk County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 137 km from the middle of the area, began a volume at 06:59 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.
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 7.0 hours before the alert went out and 201 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
- 6 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 1751 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 110 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
568
WUUS53 KFGF 160659
SVRFGF
MNC007-029-057-087-119-160800-
/O.NEW.KFGF.SV.W.0117.210916T0659Z-210916T0800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
159 AM CDT Thu Sep 16 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Northwestern Hubbard County in north central Minnesota...
Southeastern Polk County in northwestern Minnesota...
South central Beltrami County in north central Minnesota...
Northeastern Mahnomen County in northwestern Minnesota...
Central Clearwater County in northwestern Minnesota...
* Until 300 AM CDT.
* At 158 AM CDT, a severe thunderstorm was located near Fosston, or
37 miles west of Bemidji, moving east at 40 mph.
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.
* This severe thunderstorm will be near...
Lengby and Weme around 205 AM CDT.
Ebro around 210 AM CDT.
Other locations in the path of this severe thunderstorm include
Bagley, Shevlin, Pinewood and Alida.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4747 9588 4761 9580 4769 9557 4760 9480
4731 9507
TIME...MOT...LOC 0658Z 286DEG 33KT 4759 9566
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Lynch1 follow-up statement
050
WWUS53 KFGF 160748
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
248 AM CDT Thu Sep 16 2021
MNC007-029-057-087-119-160757-
/O.CAN.KFGF.SV.W.0117.000000T0000Z-210916T0800Z/
Hubbard MN-Polk MN-Beltrami MN-Mahnomen MN-Clearwater MN-
248 AM CDT Thu Sep 16 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HUBBARD...
SOUTHEASTERN POLK...SOUTH CENTRAL BELTRAMI...NORTHEASTERN MAHNOMEN
AND CENTRAL CLEARWATER COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However small hail and
gusty winds are still possible with this thunderstorm.
LAT...LON 4747 9588 4761 9580 4769 9557 4760 9480
4731 9507
TIME...MOT...LOC 0745Z 286DEG 33KT 4746 9501
$$
LynchThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 15, 10:38 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall | 52 min |
| Sep 15, 10:47 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 43 min |
| Sep 15, 11:25 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk | 50 min |
| Sep 15, 11:27 PM CDT | Special Weather Statement | FGF | Marshall | 48 min |
| Sep 15, 11:45 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 60 min |
| Sep 16, 12:14 AM CDT | Special Weather Statement | FGF | Pennington | 46 min |
| Sep 16, 12:22 AM CDT | Special Weather Statement | FGF | Polk, Red Lake | 38 min |
| Sep 16, 12:42 AM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 33 min |
| Sep 16, 1:13 AM CDT | Special Weather Statement | FGF | Red Lake | 32 min |
| Sep 16, 1:23 AM CDT | Special Weather Statement | FGF | Mahnomen | 37 min |
| Sep 16, 1:51 AM CDT | Special Weather Statement | FGF | Beltrami, Clearwater | 54 min |
| Sep 16, 2:44 AM CDT | Special Weather Statement | FGF | Hubbard | 46 min |
Nearby
Severe 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.