Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 133, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 23, 2021, 10:06 PM CDT for Sioux County, North Dakota. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2021, 10:06 PM CDT (03:06 UTC)
- Expired
- Aug 23, 2021, 10:30 PM CDT
- In force
- 24 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Sioux County, ND
The radar
The Bismarck radar (KBIS), 76 km from the middle of the area, began a volume at 03:07 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.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 3.1 hours before the alert went out and 76 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
- 16 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 2391 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 180 m²/s²
- 0-3 km storm-relative helicity
- 508 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
726
WUUS53 KBIS 240306
SVRBIS
NDC085-240330-
/O.NEW.KBIS.SV.W.0133.210824T0306Z-210824T0330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
1006 PM CDT Mon Aug 23 2021
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Southeastern Sioux County in south central North Dakota...
* Until 1030 PM CDT.
* At 1006 PM CDT, a severe thunderstorm was located 7 miles northwest
of Fort Yates, moving northeast at 50 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.
* This severe thunderstorm will be near...
Fort Yates around 1010 PM CDT.
Prairie Knights Resort around 1020 PM CDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4602 10101 4614 10104 4634 10055 4628 10058
4623 10056 4616 10063 4613 10063 4612 10062
4606 10061 4601 10056 4599 10052 4597 10051
4595 10051 4594 10095
TIME...MOT...LOC 0306Z 239DEG 42KT 4614 10077
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TELKEN2 follow-up statements
142
WWUS53 KBIS 240315
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
1015 PM CDT Mon Aug 23 2021
NDC085-240330-
/O.CON.KBIS.SV.W.0133.000000T0000Z-210824T0330Z/
Sioux ND-
1015 PM CDT Mon Aug 23 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN SIOUX COUNTY...
At 1014 PM CDT, a severe thunderstorm was located 5 miles south of
Prairie Knights Resort, or 6 miles north of Fort Yates, moving
northeast at 50 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
This severe thunderstorm will remain over mainly rural areas of
southeastern Sioux County.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4608 10093 4622 10085 4634 10055 4628 10058
4623 10056 4616 10063 4613 10063 4612 10062
4606 10061 4601 10056 4599 10052 4597 10051
4595 10051 4594 10079
TIME...MOT...LOC 0314Z 239DEG 42KT 4619 10064
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
TELKEN022
WWUS53 KBIS 240323
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
1023 PM CDT Mon Aug 23 2021
NDC085-240333-
/O.EXP.KBIS.SV.W.0133.000000T0000Z-210824T0330Z/
Sioux ND-
1023 PM CDT Mon Aug 23 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SIOUX COUNTY WILL
EXPIRE AT 1030 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire. However gusty winds are still possible with
this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
south central North Dakota.
LAT...LON 4608 10093 4622 10085 4634 10055 4628 10058
4623 10056 4616 10063 4613 10063 4612 10062
4606 10061 4601 10056 4599 10052 4597 10051
4595 10051 4594 10079
TIME...MOT...LOC 0323Z 239DEG 42KT 4623 10054
$$
TELKENThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 9:53 PM CDT | Special Weather Statement | BIS | Sioux | 37 min |
| Aug 23, 11:38 PM CDT | Special Weather Statement | BIS | Logan, McIntosh | 37 min |
| Aug 24, 12:01 AM CDT | Special Weather Statement | BIS | Grant | 29 min |
| Aug 24, 12:14 AM CDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 46 min |
| Aug 24, 12:23 AM CDT | Special Weather Statement | BIS | Dickey, LaMoure | 37 min |
| Aug 24, 12:45 AM CDT | Severe Thunderstorm Warning | BIS | Dickey | 30 min |
| Aug 24, 1:03 AM CDT | Special Weather Statement | BIS | Emmons | 27 min |
| Aug 24, 2:01 AM CDT | Special Weather Statement | BIS | Logan | 29 min |
| Aug 24, 2:57 AM CDT | Areal Flood Advisory | BIS | Logan | 98 min |
| Aug 24, 5:54 AM CDT | Special Weather Statement | BIS | Mountrail | 36 min |
| Aug 24, 6:16 AM CDT | Severe Thunderstorm Warning | BIS | McLean, Mountrail, Ward | 29 min |
| Aug 24, 7:26 AM CDT | Special Weather Statement | BIS | Pierce | 34 min |
| Aug 24, 8:19 AM CDT | Special Weather Statement | BIS | McHenry | 26 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.