Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 8, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 6, 2021, 3:24 AM CDT for Cavalier County, Pembina County, Walsh County, North Dakota; Kittson County, Marshall County, Minnesota. It was in force for 66 min. 2 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 6, 2021, 3:24 AM CDT (08:24 UTC)
- Expired
- Jun 6, 2021, 4:30 AM CDT
- In force
- 66 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Kittson County, MN, Marshall County, MN, Cavalier County, ND, Pembina County, ND, Walsh County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 125 km from the middle of the area, began a volume at 08:27 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 6, 3:25 AM CDT | TSTM WND GST 62 | 1 W Milton, ND | |
| Jun 6, 3:33 AM CDT | TSTM WND GST 63 | 5 N Adams, ND | VIA NDAWN. |
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 6, 1:39 AM CDT | Severe Thunderstorm Watch | SPC | 3 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 8.4 hours before the alert went out and 309 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
- 1639 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 3032 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 118 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.1
The text
As transmitted.
589
WUUS53 KFGF 060824
SVRFGF
MNC069-089-NDC019-067-099-060930-
/O.NEW.KFGF.SV.W.0008.210606T0824Z-210606T0930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
324 AM CDT Sun Jun 6 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Northwestern Marshall County in northwestern Minnesota...
Kittson County in northwestern Minnesota...
Eastern Cavalier County in northeastern North Dakota...
Walsh County in northeastern North Dakota...
Pembina County in northeastern North Dakota...
* Until 430 AM CDT.
* At 324 AM CDT, severe thunderstorms were located along a line
extending from 7 miles northwest of Maida to near Niagara, moving
northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Grafton, Langdon, Park River, Cavalier, Walhalla, Hallock and
Drayton.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.
&&
LAT...LON 4900 9677 4890 9669 4848 9659 4819 9780
4820 9793 4846 9832 4854 9832 4855 9838
4900 9869
TIME...MOT...LOC 0824Z 239DEG 49KT 4908 9846 4795 9781
HAIL...<.75IN
WIND...60MPH
$$
CJ2 follow-up statements
829
WWUS53 KFGF 060858
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
358 AM CDT Sun Jun 6 2021
MNC089-NDC019-099-060908-
/O.CAN.KFGF.SV.W.0008.000000T0000Z-210606T0930Z/
Marshall MN-Cavalier ND-Walsh ND-
358 AM CDT Sun Jun 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MARSHALL...
EASTERN CAVALIER AND WALSH COUNTIES IS CANCELLED...
The storms which prompted the warning have moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northwestern Minnesota...and northeastern North Dakota.
LAT...LON 4900 9677 4890 9669 4854 9661 4854 9792
4872 9793 4872 9795 4900 9795
TIME...MOT...LOC 0858Z 239DEG 49KT 4931 9789 4817 9725
$$
MNC069-NDC067-060930-
/O.CON.KFGF.SV.W.0008.000000T0000Z-210606T0930Z/
Kittson MN-Pembina ND-
358 AM CDT Sun Jun 6 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 AM CDT
FOR KITTSON AND PEMBINA COUNTIES...
At 358 AM CDT, severe thunderstorms were located along a line
extending from 26 miles north of Walhalla to near Poland, moving
northeast at 55 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Cavalier, Walhalla, Hallock, Drayton, Pembina, Neche and Lancaster.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.
&&
LAT...LON 4900 9677 4890 9669 4854 9661 4854 9792
4872 9793 4872 9795 4900 9795
TIME...MOT...LOC 0858Z 239DEG 49KT 4931 9789 4817 9725
HAIL...<.75IN
WIND...60MPH
$$
CJ935
WWUS53 KFGF 060920
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
420 AM CDT Sun Jun 6 2021
MNC069-NDC067-060930-
/O.EXP.KFGF.SV.W.0008.000000T0000Z-210606T0930Z/
Kittson MN-Pembina ND-
420 AM CDT Sun Jun 6 2021
...THE SEVERE THUNDERSTORM WARNING FOR KITTSON AND PEMBINA COUNTIES
WILL EXPIRE AT 430 AM CDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 700 AM CDT for
northwestern Minnesota...and northeastern North Dakota.
LAT...LON 4900 9677 4890 9669 4854 9661 4854 9792
4872 9793 4872 9795 4900 9795
TIME...MOT...LOC 0920Z 239DEG 49KT 4945 9753 4831 9690
$$
CJThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 7:24 PM CDT | Special Weather Statement | FGF | Pembina | 66 min |
| Jun 5, 7:47 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 58 min |
| Jun 5, 8:44 PM CDT | Severe Thunderstorm Warning | FGF | Pembina | 16 min |
| Jun 6, 1:49 AM CDT | Special Weather Statement | FGF | Benson, Eddy, Towner | 56 min |
| Jun 6, 1:55 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Cavalier, Eddy, Ramsey, Towner | 65 min |
| Jun 6, 2:17 AM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Towner | 43 min |
| Jun 6, 2:39 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Cavalier, Eddy, Grand Forks, Griggs, Nelson and 4 more | 51 min |
| Jun 6, 4:33 AM CDT | Red Flag Warning | FGF | Barnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 8 more | 16 hr |
| Jun 5, 10:04 PM CDT | Special Weather Statement | FGF | Kittson | 41 min |
| Jun 6, 12:48 AM CDT | Special Weather Statement | FGF | Roseau | 57 min |
| Jun 6, 11:23 AM CDT | Fire Weather Watch | FGF | Becker, Beltrami, Clay, Clearwater, Hubbard, Kittson and 8 more | 16 hr |
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.