Alert archive / Minnesota / Tornado Warnings in 2020
Tornado Warning 28, NWS Grand Forks, ND
NWS Grand Forks, ND issued this tornado warning at Aug 9, 2020, 2:01 PM CDT for Marshall County, Pennington County, Polk County, Minnesota. It was in force for 44 min. 5 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
- Aug 9, 2020, 2:01 PM CDT (19:01 UTC)
- Expired
- Aug 9, 2020, 2:45 PM CDT
- In force
- 44 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Marshall County, MN, Pennington County, MN, Polk County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 92 km from the middle of the area, began a volume at 19:02 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 9, 2:13 PM CDT | TORNADO | 12 W Thief River Falls, MN | POSSIBLE BRIEF TORNADO TOUCHDOWN AS VIEWED FROM HIGHWAY 1, WEST OF THIEF RIVER FALLS. |
| Aug 9, 2:13 PM CDT | TORNADO | 12 W Thief River Falls, MN | POSSIBLE BRIEF TORNADO TOUCHDOWN AS VIEWED FROM HIGHWAY 1, WEST OF THIEF RIVER FALLS. |
| Aug 9, 2:33 PM CDT | TSTM WND DMG | 6 S Thief River Falls, MN | TWO OAK TREES WERE SNAPPED IN A FARMYARD. REPORT AND PHOTO POSTED VIA SOCIAL MEDIA. |
| Aug 9, 2:35 PM CDT | TSTM WND GST 77 | 2 Ssw Thief River Falls, MN | PEAK WIND MEASURED AT THE THIEF RIVER FALLS AIRPORT /KTVF/. |
| Aug 9, 2:35 PM CDT | TSTM WND GST 77 | 2 Ssw Thief River Falls, MN | PEAK WIND MEASURED AT THE THIEF RIVER FALLS AIRPORT /KTVF/. |
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 9, 12:18 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 7.0 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
- 2237 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 97 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
641
WFUS53 KFGF 091901
TORFGF
MNC089-113-119-091945-
/O.NEW.KFGF.TO.W.0028.200809T1901Z-200809T1945Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Grand Forks ND
201 PM CDT Sun Aug 9 2020
The National Weather Service in Grand Forks has issued a
* Tornado Warning for...
South central Marshall County in northwestern Minnesota...
North central Polk County in northwestern Minnesota...
Western Pennington County in northwestern Minnesota...
* Until 245 PM CDT.
* At 201 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Angus, or 21 miles west of Thief River Falls,
moving east at 40 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
* Locations impacted include...
Thief River Falls, Viking, Rosewood, Hazel, Carpenters Corner,
Dakota Junction and St. Hilaire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4809 9674 4821 9671 4826 9611 4799 9604
TIME...MOT...LOC 1901Z 273DEG 33KT 4813 9665
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
CJ1 follow-up statement
994
WWUS53 KFGF 091924
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
224 PM CDT Sun Aug 9 2020
MNC119-091933-
/O.CAN.KFGF.TO.W.0028.000000T0000Z-200809T1945Z/
Polk MN-
224 PM CDT Sun Aug 9 2020
...THE TORNADO WARNING FOR NORTH CENTRAL POLK COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
northwestern Minnesota.
LAT...LON 4804 9639 4823 9640 4826 9611 4799 9604
TIME...MOT...LOC 1923Z 276DEG 31KT 4810 9636
$$
MNC089-113-091945-
/O.CON.KFGF.TO.W.0028.000000T0000Z-200809T1945Z/
Marshall MN-Pennington MN-
224 PM CDT Sun Aug 9 2020
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 245 PM CDT FOR SOUTH
CENTRAL MARSHALL AND WESTERN PENNINGTON COUNTIES...
At 223 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Carpenters Corner, or 8 miles west of Thief River
Falls, moving east at 35 mph.
HAZARD...TORNADO and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles.
Locations impacted include...
Thief River Falls, Rosewood, Hazel, Dakota Junction and St. Hilaire.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
This cluster of thunderstorms is capable of producing tornadoes and
widespread significant wind damage. Do not wait to see or hear the
tornado. For your protection move to an interior room on the lowest
floor of a building.
&&
LAT...LON 4804 9639 4823 9640 4826 9611 4799 9604
TIME...MOT...LOC 1923Z 276DEG 31KT 4810 9636
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
TGThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 4:36 AM CDT | Special Weather Statement | FGF | Grant, Wilkin | 54 min |
| Aug 9, 4:55 AM CDT | Special Weather Statement | FGF | Otter Tail | 65 min |
| Aug 9, 5:49 AM CDT | Special Weather Statement | FGF | Becker, Wadena | 56 min |
| Aug 9, 7:10 AM CDT | Special Weather Statement | FGF | Norman | 65 min |
| Aug 9, 8:41 AM CDT | Special Weather Statement | FGF | Lake of the Woods | 64 min |
| Aug 9, 12:21 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Marshall | 54 min |
| Aug 9, 1:08 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Roseau | 67 min |
| Aug 9, 1:39 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Polk | 66 min |
| Aug 9, 2:05 PM CDT | Severe Thunderstorm Warning | FGF | Marshall, Pennington, Polk, Red Lake | 55 min |
| Aug 9, 2:10 PM CDT | Severe Thunderstorm Warning | FGF | Norman, Polk, Red Lake | 65 min |
| Aug 9, 2:20 PM CDT | Tornado Warning | FGF | Beltrami, Marshall | 40 min |
| Aug 9, 2:42 PM CDT | Tornado Warning | FGF | Beltrami, Clearwater, Marshall, Pennington, Polk, Red Lake | 48 min |
| Aug 9, 2:49 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Lake of the Woods, Marshall, Roseau | 56 min |
| Aug 9, 2:52 PM CDT | Severe Thunderstorm Warning | FGF | Clay, Norman | 53 min |
| Aug 9, 2:57 PM CDT | Tornado Warning | FGF | Beltrami, Marshall | 33 min |
| Aug 9, 3:06 PM CDT | Tornado Warning | FGF | Lake of the Woods, Roseau | 24 min |
| Aug 9, 3:12 PM CDT | Severe Thunderstorm Warning | FGF | Polk, Red Lake | 63 min |
| Aug 9, 3:18 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Lake of the Woods, Marshall, Pennington, Polk and 2 more | 57 min |
| Aug 9, 3:20 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 22 min |
| Aug 9, 3:35 PM CDT | Tornado Warning | FGF | Clay, Norman | 18 min |
| Aug 9, 3:41 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Hubbard, Mahnomen, Norman, Polk and 1 more | 64 min |
| Aug 9, 3:47 PM CDT | Tornado Warning | FGF | Lake of the Woods | 28 min |
| Aug 9, 3:53 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Clay, Clearwater, Hubbard, Mahnomen, Norman | 48 min |
| Aug 9, 4:38 PM CDT | Severe Thunderstorm Warning | FGF | Becker, Beltrami, Clearwater, Hubbard, Mahnomen, Norman and 1 more | 52 min |
| Aug 9, 5:28 PM CDT | Special Weather Statement | FGF | Hubbard | 32 min |
| Aug 9, 5:31 PM CDT | Severe Thunderstorm Warning | FGF | Hubbard | 29 min |
| Aug 9, 5:33 PM CDT | Special Weather Statement | FGF | Clearwater | 57 min |
Nearby
Tornado Warnings in Minnesota, 2020Every tornado warning in 2020Tornadoes in 2020
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.