Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 89, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Aug 9, 2021, 9:09 PM CDT for 4 counties in North Dakota. It was in force for 66 min. 10 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, 2021, 9:09 PM CDT (02:09 UTC)
- Expired
- Aug 9, 2021, 10:15 PM CDT
- In force
- 66 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Tornado
- Possible
- Damage threat
- Considerable
- Hail
- 1.75 in
- Wind
- 70.0 mph
Counties Grand Forks County, ND, Griggs County, ND, Nelson County, ND, Steele County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 40 km from the middle of the area, began a volume at 02:13 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, 9:09 PM CDT | FUNNEL CLOUD | 4 Wnw Sharon, ND | A WELL DEVELOPED WALL CLOUD AND FUNNEL WERE VIEWED PASSING OVER A FARMSTEAD, AND REPORTED TO THE STEELE COUNTY SHERIFFS OFFICE. |
| Aug 9, 9:19 PM CDT | TORNADO | 6 Nne Sharon, ND | POSSIBLE TORNADO INDICATED BY RADAR BASED DEBRIS SIGNATURE FROM 6NNE SHARON TO NEAT 8 NE SHARON BY 925 PM CDT. |
| Aug 9, 9:20 PM CDT | TORNADO 2 | 5 Nne Sharon, ND | A TORNADO TRACKED EASTWARD FOR ROUGHLY 3 MILES FROM FAR NORTHEAST SHARON TOWNSHIP ACROSS FAR NORTHWESTERN WESTFIELD TOWNSHIP TO AROUND 7 NE SHARON BY 928 PM CDT. A TORNADO DEBRIS SIGNATURE WAS EVIDENT ON KMVX RADAR. THE TORNADO COMPLETELY DISMANTLED AND DESTRO |
| Aug 9, 9:23 PM CDT | TSTM WND DMG | 7 Ne Aneta, ND | SPRUCE TREES PARTIALLY UPROOTED IN A SHELTERBELT. TIME ESTIMATED BASED ON RADAR. |
| Aug 9, 9:28 PM CDT | FUNNEL CLOUD | 8 Ne Sharon, ND | A WELL DEVELOPED WALL CLOUD WITH POSSIBLE FUNNEL WAS REPORTED BY A STORM CHASER/STORM SPOTTER. |
| Aug 9, 9:31 PM CDT | TSTM WND GST 67 | 2 E Logan Center, ND | PEAK WIND MEASURED AT AN NDAWN STATION AT 10 METERS. |
| Aug 9, 9:36 PM CDT | TSTM WND DMG | 4 Ne Logan Center, ND | 12 INCH DIAMETER CORRONWOOD LIMB DOWN. PEAS SIZED HAIL ALSO REPORTED. RELAY VIA SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Aug 9, 9:36 PM CDT | TSTM WND DMG | 4 Ne Logan Center, ND | 12 INCH DIAMETER COTTONWOOD LIMB DOWN. PEA SIZED HAIL ALSO REPORTED. RELAYED VIA SOICAL MEDIA. TIME ESTIMATED FROM RADAR. |
| Aug 9, 9:42 PM CDT | TORNADO 1 | 5 Wnw Northwood, ND | A FEW COTTONWOOD TREES WERE SNAPPED OR UPROOTED IN A SHELTERBELT BETWEEN ABOUT 942 AND 943 PM CDT. LIKELY A BRIEF TORNADO TOUCHDOWN BASED ON RADAR SIGNATURE. PEAK WINDS ESTIMATED TO 90 MPH. MAXIMUM WIDTH TO 150 YARDS. TIME ESTIMATED BASED ON RADAR. |
| Aug 9, 9:45 PM CDT | TSTM WND DMG | 2 Wsw Northwood, ND | A POPLAR TREE WAS BLOWN DOWN ALONG WITH SEVERAL LARGE TREE BRANCHES AND LIMBS AT THE NORTHWOOD GOLF COURSE. LIKELY CAUSED BY REAR FLANK DOWNDRAFT FROM A SUPERCELL THUNDERSTORM. TIME ESTIMATED BASED ON RADAR. |
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, 4:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 2.2 hours before the alert went out and 249 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
- 296 J/kg
- Mixed-layer CIN
- -462 J/kg
- Mixed-layer LCL
- 1238 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- -40 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
627
WUUS53 KFGF 100209
SVRFGF
NDC035-039-063-091-100315-
/O.NEW.KFGF.SV.W.0089.210810T0209Z-210810T0315Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Grand Forks ND
909 PM CDT Mon Aug 9 2021
The National Weather Service in Grand Forks has issued a
* Severe Thunderstorm Warning for...
Southwestern Grand Forks County in northeastern North Dakota...
Southeastern Nelson County in northeastern North Dakota...
Northeastern Griggs County in southeastern North Dakota...
Northern Steele County in southeastern North Dakota...
* Until 1015 PM CDT.
* At 908 PM CDT, a severe thunderstorm was located over Aneta, or 46
miles west of Grand Forks, moving east at 25 mph.
HAZARD...Golf ball size hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
* This severe thunderstorm will be near...
Aneta around 910 PM CDT.
Other locations in the path of this severe thunderstorm include Logan
Center, Kempton and Northwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4799 9765 4767 9740 4767 9747 4766 9748
4756 9823 4774 9825
TIME...MOT...LOC 0208Z 253DEG 24KT 4771 9802
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
TG1 follow-up statement
732
WWUS53 KFGF 100238
SVSFGF
Severe Weather Statement
National Weather Service Grand Forks ND
938 PM CDT Mon Aug 9 2021
NDC039-100248-
/O.CAN.KFGF.SV.W.0089.000000T0000Z-210810T0315Z/
Griggs ND-
938 PM CDT Mon Aug 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRIGGS COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southeastern and northeastern North Dakota.
LAT...LON 4799 9765 4767 9740 4767 9747 4766 9748
4759 9797 4781 9793
TIME...MOT...LOC 0238Z 253DEG 24KT 4777 9774
$$
NDC035-063-091-100315-
/O.CON.KFGF.SV.W.0089.000000T0000Z-210810T0315Z/
Grand Forks ND-Nelson ND-Steele ND-
938 PM CDT Mon Aug 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CDT
FOR SOUTHWESTERN GRAND FORKS...SOUTHEASTERN NELSON AND NORTHERN
STEELE COUNTIES...
At 938 PM CDT, a severe thunderstorm was located near Logan Center,
or 32 miles west of Grand Forks, moving east at 30 mph.
HAZARD...Golf ball size hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Kempton and Northwood.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.
&&
LAT...LON 4799 9765 4767 9740 4767 9747 4766 9748
4759 9797 4781 9793
TIME...MOT...LOC 0238Z 253DEG 24KT 4777 9774
TORNADO...POSSIBLE
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
TGThe office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:04 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Ramsey, Towner | 56 min |
| Aug 9, 7:11 PM CDT | Tornado Warning | FGF | Cavalier, Ramsey, Towner | 34 min |
| Aug 9, 7:29 PM CDT | Severe Thunderstorm Warning | FGF | Eddy, Griggs, Nelson | 46 min |
| Aug 9, 7:57 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina, Ramsey, Walsh | 63 min |
| Aug 9, 8:08 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Nelson | 27 min |
| Aug 9, 8:12 PM CDT | Severe Thunderstorm Warning | FGF | Eddy, Griggs, Nelson | 63 min |
| Aug 9, 8:28 PM CDT | Tornado Warning | FGF | Griggs, Nelson | 32 min |
| Aug 9, 8:52 PM CDT | Severe Thunderstorm Warning | FGF | Cavalier, Pembina | 38 min |
| Aug 9, 9:20 PM CDT | Tornado Warning | FGF | Grand Forks, Nelson, Steele | 40 min |
| Aug 9, 9:42 PM CDT | Tornado Warning | FGF | Grand Forks | 48 min |
| Aug 9, 9:54 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Steele | 66 min |
| Aug 9, 10:08 PM CDT | Special Weather Statement | FGF | Pembina | 52 min |
| Aug 9, 10:30 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Steele, Traill | 30 min |
| Aug 9, 10:42 PM CDT | Severe Thunderstorm Warning | FGF | Grand Forks, Traill | 63 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.