Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 106, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 24, 2021, 2:14 AM CDT for Ransom County, Richland County, Sargent County, North Dakota; Grant County, Otter Tail County, Wilkin County, Minnesota. It was in force for 46 min. 1 report 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
- Aug 24, 2021, 2:14 AM CDT (07:14 UTC)
- Expired
- Aug 24, 2021, 3:00 AM CDT
- In force
- 46 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Grant County, MN, Otter Tail County, MN, Wilkin County, MN, Ransom County, ND, Richland County, ND, Sargent County, ND
The radar
The Aberdeen radar (KABR), 172 km from the middle of the area, began a volume at 07:17 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 |
|---|---|---|---|
| Aug 24, 2:15 AM CDT | TSTM WND DMG | 3 Wsw Wyndmere, ND | SEVERAL LARGE 3 TO 5 INCH DIAMETER TREE BRANCHES BROKEN DOWN AROUND A FARMSTEAD. VERY STRONG WINDS OCCURRED FOR ABOUT 10 MINUTES, FROM 210 AM THROUGH 220 AM CDT. |
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 |
|---|---|---|---|
| Aug 23, 10:11 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 7.2 hours before the alert went out and 205 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
- 142 J/kg
- Mixed-layer CIN
- -222 J/kg
- Mixed-layer LCL
- 2124 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 173 m²/s²
- 0-3 km storm-relative helicity
- 342 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
The text
As transmitted.
455
WUUS53 KFGF 240714
SVRFGF
MNC051-111-167-NDC073-077-081-240815-
/O.NEW.KFGF.SV.W.0106.210824T0714Z-210824T0815Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
214 AM CDT Tue Aug 24 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Western Otter Tail County in west central Minnesota...
Grant County in west central Minnesota...
Wilkin County in west central Minnesota...
Eastern Ransom County in southeastern North Dakota...
Richland County in southeastern North Dakota...
Eastern Sargent County in southeastern North Dakota...
* Until 315 AM CDT.
* At 214 AM CDT, severe thunderstorms were located along a line
extending from near Kindred to near Mooreton to Lake Traverse
Reservation, moving east at 50 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Mooreton around 215 AM CDT.
Walcott and Great Bend around 220 AM CDT.
Dwight around 225 AM CDT.
Christine, Wolverton and Lamars around 230 AM CDT.
Other locations in the path of these severe thunderstorms include
Breckenridge, Wahpeton and Blackmer.
This includes the following highways...
Interstate 29 between mile markers 0 and 48.
Interstate 94 in Minnesota between mile markers 28 and 80.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4577 9625 4602 9627 4602 9657 4593 9656
4594 9747 4627 9734 4663 9742 4663 9595
4623 9572 4611 9573 4611 9577 4576 9576
TIME...MOT...LOC 0714Z 271DEG 43KT 4661 9705 4623 9693 4591 9697
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.88 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CJ2 follow-up statements
409
WWUS53 KFGF 240744
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
244 AM CDT Tue Aug 24 2021
NDC073-081-240753-
/O.CAN.KFGF.SV.W.0106.000000T0000Z-210824T0815Z/
Ransom ND-Sargent ND-
244 AM CDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR EASTERN RANSOM AND EASTERN
SARGENT COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled. However, gusty
winds may still be possible .
A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
southeastern North Dakota. A Severe Thunderstorm Watch also remains
in effect until 900 AM CDT for west central Minnesota.
LAT...LON 4577 9625 4602 9627 4602 9657 4593 9656
4594 9720 4647 9702 4647 9586 4623 9572
4611 9573 4611 9577 4576 9576
TIME...MOT...LOC 0743Z 270DEG 43KT 4660 9662 4622 9650 4590 9654
$$
MNC051-111-167-NDC077-240815-
/O.CON.KFGF.SV.W.0106.000000T0000Z-210824T0815Z/
Otter Tail MN-Grant MN-Wilkin MN-Richland ND-
244 AM CDT Tue Aug 24 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 315 AM CDT
FOR SOUTHWESTERN OTTER TAIL...GRANT...WILKIN AND RICHLAND COUNTIES...
At 243 AM CDT, severe thunderstorms were located along a line
extending from 6 miles northeast of Wolverton to near Doran to White
Rock, moving east at 50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Doran, Everdell, Foxhome, Western, Norcross and Herman.
This includes the following highways...
Interstate 29 between mile markers 0 and 37.
Interstate 94 in Minnesota between mile markers 40 and 80.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with these storms.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4577 9625 4602 9627 4602 9657 4593 9656
4594 9720 4647 9702 4647 9586 4623 9572
4611 9573 4611 9577 4576 9576
TIME...MOT...LOC 0743Z 270DEG 43KT 4660 9662 4622 9650 4590 9654
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CJ978
WWUS53 KFGF 240800
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
300 AM CDT Tue Aug 24 2021
MNC051-111-167-NDC077-240809-
/O.CAN.KFGF.SV.W.0106.000000T0000Z-210824T0815Z/
Otter Tail MN-Grant MN-Wilkin MN-Richland ND-
300 AM CDT Tue Aug 24 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN OTTER TAIL...
GRANT...WILKIN AND RICHLAND COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
southeastern North Dakota. A Severe Thunderstorm Watch also remains
in effect until 900 AM CDT for west central Minnesota.
LAT...LON 4577 9625 4602 9627 4602 9657 4593 9656
4594 9720 4647 9702 4647 9586 4623 9572
4611 9573 4611 9577 4576 9576
TIME...MOT...LOC 0757Z 271DEG 43KT 4660 9637 4622 9625 4590 9629
$$
CJThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 12:47 AM CDT | Special Weather Statement | FGF | Ransom, Sargent | 58 min |
| Aug 24, 1:12 AM CDT | Severe Thunderstorm Warning | FGF | Richland, Sargent | 63 min |
| Aug 24, 1:30 AM CDT | Special Weather Statement | FGF | Barnes | 15 min |
| Aug 24, 1:43 AM CDT | Special Weather Statement | FGF | Barnes, Cass, Ransom | 32 min |
| Aug 24, 2:18 AM CDT | Special Weather Statement | FGF | Cass, Traill | 57 min |
| Aug 24, 12:05 PM CDT | Special Weather Statement | FGF | Benson | 25 min |
| Aug 24, 3:05 AM CDT | Special Weather Statement | FGF | Grant | 55 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.