Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 129, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 9, 2021, 8:14 PM CDT for Foster County, North Dakota. It was in force for 31 min. 1 report 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, 8:14 PM CDT (01:14 UTC)
- Expired
- Aug 9, 2021, 8:45 PM CDT
- In force
- 31 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Foster County, ND
The radar
The Fargo/Grand Forks radar (KMVX), 104 km from the middle of the area, began a volume at 01:13 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, 8:23 PM CDT | HAIL 1 | 3 Ese Mchenry, ND | ALSO RECEIVED 1.00 IN OF RAIN. |
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, 1.2 hours before the alert went out and 171 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.
686
WUUS53 KBIS 100114
SVRBIS
NDC031-100145-
/O.NEW.KBIS.SV.W.0129.210810T0114Z-210810T0145Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
814 PM CDT Mon Aug 9 2021
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Northeastern Foster County in southeastern North Dakota...
* Until 845 PM CDT.
* At 813 PM CDT, a severe thunderstorm was located over Mchenry, or
27 miles east of Carrington, moving northeast at 25 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Trained weather spotters reported half dollar sized hail
3 west of Mchenry.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
wind damage to roofs, siding, and trees.
* This severe thunderstorm will remain over mainly rural areas of
northeastern Foster County, including the following locations...
Juanita.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4740 9875 4748 9884 4759 9887 4759 9850
4742 9850
TIME...MOT...LOC 0113Z 242DEG 24KT 4757 9856
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TELKEN2 follow-up statements
114
WWUS53 KBIS 100132
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
832 PM CDT Mon Aug 9 2021
NDC031-100145-
/O.CON.KBIS.SV.W.0129.000000T0000Z-210810T0145Z/
Foster ND-
832 PM CDT Mon Aug 9 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHEASTERN FOSTER COUNTY...
At 832 PM CDT, a severe thunderstorm was located over Red Willow
Lake, or 36 miles east of Carrington, moving northeast at 30 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Glenfield, Mchenry and Juanita.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4740 9875 4746 9874 4759 9875 4759 9850
4742 9850
TIME...MOT...LOC 0132Z 242DEG 24KT 4763 9839
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TELKEN046
WWUS53 KBIS 100140
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
840 PM CDT Mon Aug 9 2021
NDC031-100150-
/O.EXP.KBIS.SV.W.0129.000000T0000Z-210810T0145Z/
Foster ND-
840 PM CDT Mon Aug 9 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN FOSTER COUNTY
WILL EXPIRE AT 845 PM CDT...
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.
A Severe Thunderstorm Watch remains in effect until 1100 PM CDT for
southeastern North Dakota.
LAT...LON 4740 9875 4746 9874 4759 9875 4759 9850
4742 9850
TIME...MOT...LOC 0140Z 242DEG 24KT 4765 9833
$$
TELKENThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:27 PM CDT | Severe Thunderstorm Warning | BIS | Foster | 48 min |
| Aug 9, 7:35 PM CDT | Special Weather Statement | BIS | LaMoure | 25 min |
| Aug 9, 7:51 PM CDT | Severe Thunderstorm Warning | BIS | LaMoure, Stutsman | 24 min |
| Aug 10, 4:02 AM CDT | Red Flag Warning | BIS | Adams, Billings, Bowman, Emmons, Golden Valley, Grant and 4 more | 17 hr |
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.