Alert archive / Minnesota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 127, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Oct 9, 2021, 8:06 PM CDT for Cass County, Ransom County, Richland County, North Dakota; 4 counties in Minnesota. It was in force for 41 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
- Oct 9, 2021, 8:06 PM CDT (01:06 UTC)
- Expired
- Oct 9, 2021, 8:47 PM CDT
- In force
- 41 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Clay County, MN, Grant County, MN, Otter Tail County, MN, Wilkin County, MN, Cass County, ND, Ransom County, ND, Richland County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 149 km from the middle of the area, began a volume at 01:05 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, 8:15 PM CDT | TSTM WND DMG | Fergus Falls, MN | REPORT OF SEVERAL TREES DOWN AND ROADS UNPASSABLE DUE TO BRANCH DEBRIS IN TOWN. TIME ESTIMATED. |
| Oct 9, 8:15 PM CDT | TSTM WND DMG | Fergus Falls, MN | REPORTS FROM FERGUSNOW.COM OF SEVERAL TREES DOWN AND ROADS UNPASSABLE IN TOWN. TIME ESTIMATED. |
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 |
| Oct 9, 6:34 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 1.1 hours before the alert went out and 239 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1552 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
934
WUUS53 KFGF 100106
SVRFGF
MNC027-051-111-167-NDC017-073-077-100200-
/O.NEW.KFGF.SV.W.0127.211010T0106Z-211010T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
806 PM CDT Sat Oct 9 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Southern Clay County in northwestern Minnesota...
Otter Tail County in west central Minnesota...
Northeastern Grant County in west central Minnesota...
Northern Wilkin County in west central Minnesota...
East central Ransom County in southeastern North Dakota...
Southeastern Cass County in southeastern North Dakota...
Northern Richland County in southeastern North Dakota...
* Until 900 PM CDT.
* At 805 PM CDT, severe thunderstorms were located along a line
extending from near Barrie to 6 miles southwest of Rothsay to near
Erdahl, moving northeast at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Severe thunderstorms will be near...
Erdahl around 810 PM CDT.
Rothsay and Carlisle around 815 PM CDT.
Elizabeth around 820 PM CDT.
Other locations in the path of these severe thunderstorms include
Erhard, Christine, Hickson, Oxbow and Maplewood State Park.
This includes the following highways...
Interstate 29 between mile markers 34 and 56.
Interstate 94 in Minnesota between mile markers 16 and 80.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4636 9641 4649 9736 4674 9721 4675 9618
4672 9617 4672 9577 4611 9515 4611 9577
4584 9576
TIME...MOT...LOC 0105Z 228DEG 29KT 4652 9709 4640 9636 4594 9581
TORNADO...POSSIBLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DJR2 follow-up statements
047
WWUS53 KFGF 100132
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
832 PM CDT Sat Oct 9 2021
NDC017-073-077-100142-
/O.CAN.KFGF.SV.W.0127.000000T0000Z-211010T0200Z/
Ransom ND-Cass ND-Richland ND-
832 PM CDT Sat Oct 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL RANSOM...
SOUTHEASTERN CASS AND NORTHERN RICHLAND COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened. Therefore, the
warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Minnesota. A Severe Thunderstorm Watch also remains in
effect until 200 AM CDT for northwestern and west central Minnesota.
LAT...LON 4584 9576 4600 9595 4646 9633 4662 9673
4674 9675 4675 9618 4672 9617 4672 9577
4611 9515 4611 9577
TIME...MOT...LOC 0132Z 234DEG 35KT 4667 9668 4654 9603 4605 9566
$$
MNC027-051-111-167-100200-
/O.CON.KFGF.SV.W.0127.000000T0000Z-211010T0200Z/
Clay MN-Otter Tail MN-Grant MN-Wilkin MN-
832 PM CDT Sat Oct 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHERN CLAY...OTTER TAIL...NORTHEASTERN GRANT AND NORTHEASTERN
WILKIN COUNTIES...
At 832 PM CDT, severe thunderstorms were located along a line
extending from near Comstock to near Pelican Rapids to near
Evansville, moving northeast at 40 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Lake Lida, Maplewood State Park, Pelican Rapids, Dunvilla, Urbank,
Barnesville, Star Lake, Big McDonald Lake, Dent and Vergas.
This includes Interstate 94 in Minnesota between mile markers 16 and
80.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4584 9576 4600 9595 4646 9633 4662 9673
4674 9675 4675 9618 4672 9617 4672 9577
4611 9515 4611 9577
TIME...MOT...LOC 0132Z 234DEG 35KT 4667 9668 4654 9603 4605 9566
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
DJR841
WWUS53 KFGF 100147
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
847 PM CDT Sat Oct 9 2021
MNC027-051-111-167-100157-
/O.CAN.KFGF.SV.W.0127.000000T0000Z-211010T0200Z/
Clay MN-Otter Tail MN-Grant MN-Wilkin MN-
847 PM CDT Sat Oct 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN CLAY...OTTER TAIL...
NORTHEASTERN GRANT AND NORTHEASTERN WILKIN COUNTIES IS CANCELLED...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 1000 PM CDT for
west central Minnesota. A Severe Thunderstorm Watch also remains in
effect until 200 AM CDT for northwestern and west central Minnesota.
LAT...LON 4584 9576 4600 9595 4646 9633 4662 9673
4674 9675 4675 9618 4672 9617 4672 9577
4611 9515 4611 9577
TIME...MOT...LOC 0143Z 228DEG 29KT 4673 9658 4660 9593 4611 9556
$$
DJRThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 9, 7:13 PM CDT | Areal Flood Advisory | FGF | Sargent | 15 hr |
| Oct 9, 7:26 PM CDT | Severe Thunderstorm Warning | FGF | Ransom, Richland, Sargent | 64 min |
| Oct 9, 10:07 PM CDT | Areal Flood Advisory | FGF | Barnes, Cass, Ransom, Steele, Traill | 12 hr |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2021Severe 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.