Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 51, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 19, 2021, 1:32 PM CDT for Clay County, Norman County, Polk County, Minnesota; 4 counties in North Dakota. It was in force for 58 min. 12 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
- Jul 19, 2021, 1:32 PM CDT (18:32 UTC)
- Expired
- Jul 19, 2021, 2:30 PM CDT
- In force
- 58 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Clay County, MN, Norman County, MN, Polk County, MN, Cass County, ND, Grand Forks County, ND, Steele County, ND, Traill County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 39 km from the middle of the area, began a volume at 18:33 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 |
|---|---|---|---|
| Jul 19, 1:35 PM CDT | TSTM WND DMG | Portland, ND | SEVERAL LARGE HADRWOOD AND EVERGREEN TREES SNAPPED. WIDESPREAD POWER OUTAGES. TIME ESTIMATED BASED ON RADAR AND NEARBY WIND SENSOR REPORTS. |
| Jul 19, 1:38 PM CDT | TSTM WND DMG | Mayville, ND | POWER KNOCKED OUT, MEDIUM TO LARGE TREE BRANCHES FELLED, ROOF VENT BLOWN OFF. VIA SOCIAL MEDIA. |
| Jul 19, 1:38 PM CDT | HAIL 1 | 6 E Buxton, ND | |
| Jul 19, 1:43 PM CDT | TSTM WND DMG | Blanchard, ND | A FEW LARGE 4 TO 6 INCH BRANCHES BROKEN DOWN. POWER OUT FOR A SHORT PERIOD. |
| Jul 19, 1:45 PM CDT | TSTM WND GST 55 | 2 S Hillsboro, ND | NWS EMPLOYEE ESTIMATE OF 50 TO 60 MPH JUST SOUTH OF HILLSBORO AHEAD OF MAIN LINE OF STORMS. |
| Jul 19, 1:45 PM CDT | TSTM WND GST 60 | 2 S Hillsboro, ND | NWS EMPLOYEE ESTIMATE OF 50 TO 60 MPH JUST SOUTH OF HILLSBORO AHEAD OF MAIN LINE OF STORMS. |
| Jul 19, 2:05 PM CDT | TSTM WND DMG | Portland, ND | LARGE TREES DOWN, ONE TREE DAMAGED PART OF HOUSE. |
| Jul 19, 2:05 PM CDT | HAIL 1 | 2 E Buxton, ND | . |
| Jul 19, 2:05 PM CDT | HAIL 1 | 2 E Buxton, ND | |
| Jul 19, 2:06 PM CDT | TSTM WND DMG | Mayville, ND | POWER KNOCKED OUT, MEDIUM TO LARGE TREE BRANCHES FELLED, ROOF VENT BLOWN OFF. VIA SOCIAL MEDIA. |
| Jul 19, 2:17 PM CDT | TSTM WND GST 56 | 5 Nw Prosper, ND | MEASURED 56 MPH GUST...10 METER SENSOR...AT NDAWN STATION PROSPER 5 NW. |
| Jul 19, 2:29 PM CDT | TSTM WND GST 60 | 1 N Casselton, ND | PEAK WIND MEASURED AT A PERSONAL WEATHER STATION. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 6.5 hours before the alert went out and 278 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
- 654 J/kg
- Mixed-layer CIN
- -150 J/kg
- Mixed-layer LCL
- 928 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
966
WUUS53 KFGF 191832
SVRFGF
MNC027-107-119-NDC017-035-091-097-191930-
/O.NEW.KFGF.SV.W.0051.210719T1832Z-210719T1930Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
132 PM CDT Mon Jul 19 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Northwestern Clay County in northwestern Minnesota...
Western Norman County in northwestern Minnesota...
Southwestern Polk County in northwestern Minnesota...
Southeastern Grand Forks County in northeastern North Dakota...
Northern Cass County in southeastern North Dakota...
Traill County in southeastern North Dakota...
Eastern Steele County in southeastern North Dakota...
* Until 230 PM CDT.
* At 131 PM CDT, severe thunderstorms were located along a line
extending from 6 miles west of Eldred to 6 miles west of Climax to
near Hatton to near Clifford, moving south at 35 mph.
HAZARD...70 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable tree damage. Damage is likely to
mobile homes, roofs, and outbuildings.
* Severe thunderstorms will be near...
Roseville around 135 PM CDT.
Clifford, Climax and Cummings around 140 PM CDT.
Galesburg and Mayville around 145 PM CDT.
Caledonia and Nielsville around 150 PM CDT.
Other locations in the path of these severe thunderstorms include
Shelly.
This includes the following highways...
Interstate 29 between mile markers 74 and 127.
Interstate 94 in North Dakota between mile markers 319 and 326.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4684 9746 4757 9764 4778 9691 4726 9631
4706 9658
TIME...MOT...LOC 1831Z 341DEG 32KT 4767 9692 4760 9695 4761 9734 4739
9747
HAIL...0.75IN
WIND...70MPH
$$
JR1 follow-up statement
092
WWUS53 KFGF 191858
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
158 PM CDT Mon Jul 19 2021
NDC035-191908-
/O.CAN.KFGF.SV.W.0051.000000T0000Z-210719T1930Z/
Grand Forks ND-
158 PM CDT Mon Jul 19 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN GRAND FORKS
COUNTY IS CANCELLED...
The storms which prompted the warning have moved out of the warned
area. Therefore, the warning has been cancelled.
LAT...LON 4684 9746 4740 9754 4764 9675 4726 9631
4706 9658
TIME...MOT...LOC 1858Z 343DEG 31KT 4753 9670 4752 9692 4741 9692 4741
9724 4719 9737
$$
MNC027-107-119-NDC017-091-097-191930-
/O.CON.KFGF.SV.W.0051.000000T0000Z-210719T1930Z/
Clay MN-Norman MN-Polk MN-Cass ND-Traill ND-Steele ND-
158 PM CDT Mon Jul 19 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 PM CDT
FOR NORTHWESTERN CLAY...WESTERN NORMAN...SOUTHWESTERN POLK...NORTHERN
CASS...TRAILL AND SOUTHEASTERN STEELE COUNTIES...
At 158 PM CDT, severe thunderstorms were located along a line
extending from near Nielsville to near Caledonia to near Blanchard to
near Erie, moving south at 35 mph.
HAZARD...70 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect considerable
tree damage. Wind damage is also likely to mobile homes,
roofs, and outbuildings.
Locations impacted include...
Galesburg, Blanchard, Erie, Shelly, Lockhart, Grandin, Halstad,
Amenia and Hadler.
This includes the following highways...
Interstate 29 between mile markers 74 and 113.
Interstate 94 in North Dakota between mile markers 320 and 326.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4684 9746 4740 9754 4764 9675 4726 9631
4706 9658
TIME...MOT...LOC 1858Z 343DEG 31KT 4753 9670 4752 9692 4741 9692 4741
9724 4719 9737
HAIL...1.00IN
WIND...70MPH
$$
JRThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 7:15 AM CDT | Special Weather Statement | FGF | Lake of the Woods | 60 min |
| Jul 19, 7:47 AM CDT | Special Weather Statement | FGF | Roseau | 43 min |
| Jul 19, 8:19 AM CDT | Special Weather Statement | FGF | Roseau | 56 min |
| Jul 19, 8:26 AM CDT | Special Weather Statement | FGF | Kittson | 64 min |
| Jul 19, 2:27 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman, Wilkin | 63 min |
| Jul 19, 3:13 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Otter Tail, Wilkin | 62 min |
| Jul 19, 10:55 AM CDT | Special Weather Statement | FGF | Ramsey | 65 min |
| Jul 19, 11:28 AM CDT | Severe Thunderstorm Warning | FGF | Benson, Grand Forks, Nelson, Ramsey, Walsh | 62 min |
| Jul 19, 12:11 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Griggs, Nelson, Ramsey, Steele, Walsh | 64 min |
| Jul 19, 1:02 PM CDT | Special Weather Statement | FGF | Grand Forks, Steele, Traill | 58 min |
| Jul 19, 6:44 PM CDT | Severe Thunderstorm Warning | FGF | Benson, Ramsey, Towner | 46 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.