Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 124, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Oct 9, 2021, 5:46 PM CDT for Ransom County, Richland County, Sargent County, North Dakota. It was in force for 59 min. 4 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
- Oct 9, 2021, 5:46 PM CDT (22:46 UTC)
- Expired
- Oct 9, 2021, 6:45 PM CDT
- In force
- 59 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Possible
- Damage threat
- Considerable
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Ransom County, ND, Richland County, ND, Sargent County, ND
The radar
The Aberdeen radar (KABR), 90 km from the middle of the area, began a volume at 22:48 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 |
|---|---|---|---|
| Oct 9, 6:40 PM CDT | TORNADO 0 | 7 Sse Lidgerwood, ND | PICTURES AND GIF OF BRIEF TORNADO REPORTED BY A TRAINED SPOTTER AND POSTED VIA SOCIAL MEDIA. WINDS ESTIMATED TO 70 MPH. |
| Oct 9, 6:40 PM CDT | TORNADO | 7 Se Lidgerwood, ND | PICTURES AND GIF OF POSSIBLE TORNADO FROM A SPOTTER ON SOCIAL MEDIA. |
| Oct 9, 6:44 PM CDT | TSTM WND GST 70 | 8 S Lidgerwood, ND | TRAINED SPOTTER REPORTS 70MPH WIND GUSTS |
| Oct 9, 6:54 PM CDT | TSTM WND GST 62 | 6 Ssw Hankinson, ND | PERSONAL WEATHER STATION SSW OF HANKINSON REPORTS 62MPH WIND 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 |
|---|---|---|---|
| Oct 9, 2:56 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 10.8 hours before the alert went out and 143 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
- 4 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 200 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
863
WUUS53 KFGF 092246
SVRFGF
NDC073-077-081-092345-
/O.NEW.KFGF.SV.W.0124.211009T2246Z-211009T2345Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
546 PM CDT Sat Oct 9 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Southeastern Ransom County in southeastern North Dakota...
Southwestern Richland County in southeastern North Dakota...
Sargent County in southeastern North Dakota...
* Until 645 PM CDT.
* At 545 PM CDT, severe thunderstorms were located along a line
extending from 6 miles southeast of Ludden to near Opitz Lake,
moving northeast at 40 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...
Straubville and Brampton around 605 PM CDT.
Other locations in the path of these severe thunderstorms include
Cogswell, Stirum and Gwinner.
This includes Interstate 29 between mile markers 0 and 1.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4594 9801 4611 9801 4653 9764 4593 9680
TIME...MOT...LOC 2245Z 216DEG 29KT 4594 9804 4555 9748
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Lynch1 follow-up statement
542 WWUS53 KFGF 092327 SVSFGF Severe Weather Statement National Weather Service Grand Forks ND 627 PM CDT Sat Oct 9 2021 NDC073-077-081-092345- /O.CON.KFGF.SV.W.0124.000000T0000Z-211009T2345Z/ Ransom ND-Richland ND-Sargent ND- 627 PM CDT Sat Oct 9 2021 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR SOUTHEASTERN RANSOM...SOUTHWESTERN RICHLAND AND SARGENT COUNTIES... At 626 PM CDT, severe thunderstorms were located along a line extending from near Cogswell to Lake Traverse Reservation, moving northeast at 30 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. Locations impacted include... Forman, Gwinner, Stiles and Milnor. This includes Interstate 29 between mile markers 0 and 1. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4594 9782 4611 9801 4653 9764 4593 9680 TIME...MOT...LOC 2326Z 218DEG 27KT 4614 9782 4582 9716 TORNADO...POSSIBLE HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ DJR
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 8, 7:00 PM CDT | Special Weather Statement | FGF | Traill | 30 min |
| Oct 8, 7:08 PM CDT | Special Weather Statement | FGF | Traill | 37 min |
| Oct 9, 6:35 PM CDT | Tornado Warning | FGF | Richland, Sargent | 25 min |
| Oct 9, 6:43 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland, Sargent | 62 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 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.