Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 147, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 12:13 PM CDT for Morton County, Oliver County, North Dakota. It was in force for 47 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 30, 2021, 12:13 PM CDT (17:13 UTC)
- Expired
- Aug 30, 2021, 1:00 PM CDT
- In force
- 47 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
Counties Morton County, ND, Oliver County, ND
The radar
The Bismarck radar (KBIS), 69 km from the middle of the area, began a volume at 17:16 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 30, 12:14 PM CDT | HAIL 1.5 | 10 W Hannover, ND | RELAYED THROUGH SOCIAL MEDIA. TIME ESTIMATED FROM RADAR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 5.2 hours before the alert went out and 73 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
- 8 J/kg
- Mixed-layer CIN
- -262 J/kg
- Mixed-layer LCL
- 1949 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 131 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
024
WUUS53 KBIS 301713
SVRBIS
NDC059-065-301800-
/O.NEW.KBIS.SV.W.0147.210830T1713Z-210830T1800Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
1213 PM CDT Mon Aug 30 2021
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Northwestern Morton County in south central North Dakota...
Western Oliver County in south central North Dakota...
* Until 100 PM CDT.
* At 1212 PM CDT, a severe thunderstorm was located near Hannover, or
16 miles southeast of Beulah, moving southeast at 15 mph.
HAZARD...Ping pong ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
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.
* Locations impacted include...
Hannover.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4706 10170 4724 10167 4708 10125 4689 10146
TIME...MOT...LOC 1712Z 303DEG 12KT 4709 10153
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SCHILD1 follow-up statement
226
WWUS53 KBIS 301744
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
1244 PM CDT Mon Aug 30 2021
NDC059-065-301800-
/O.CON.KBIS.SV.W.0147.000000T0000Z-210830T1800Z/
Morton ND-Oliver ND-
1244 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 PM CDT
FOR NORTHWESTERN MORTON AND SOUTHWESTERN OLIVER COUNTIES...
At 1244 PM CDT, a severe thunderstorm was located 6 miles southwest
of Hannover, or 21 miles northeast of Glen Ullin, moving southeast at
5 mph.
HAZARD...Two inch hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Hannover.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4702 10164 4717 10160 4708 10125 4689 10146
TIME...MOT...LOC 1744Z 312DEG 7KT 4702 10149
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
SCHILDThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 10:51 AM CDT | Special Weather Statement | BIS | Oliver | 24 min |
| Aug 30, 10:54 AM CDT | Severe Thunderstorm Warning | BIS | Oliver | 36 min |
| Aug 30, 11:28 AM CDT | Severe Thunderstorm Warning | BIS | Oliver | 47 min |
| Aug 30, 11:33 AM CDT | Areal Flood Advisory | BIS | Oliver | 3 hr |
| Aug 30, 11:46 AM CDT | Flash Flood Warning | BIS | Oliver | 3 hr |
| Aug 30, 12:58 PM CDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 47 min |
| Aug 30, 1:02 PM CDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 43 min |
| Aug 30, 1:42 PM CDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 63 min |
| Aug 30, 1:44 PM CDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 61 min |
| Aug 30, 2:17 PM CDT | Severe Thunderstorm Warning | BIS | Morton | 58 min |
| Aug 30, 3:15 PM CDT | Severe Thunderstorm Warning | BIS | Morton | 60 min |
| Aug 30, 3:48 PM CDT | Severe Thunderstorm Warning | BIS | McLean | 42 min |
| Aug 30, 4:16 PM CDT | Severe Thunderstorm Warning | BIS | Morton | 59 min |
| Aug 30, 4:32 PM CDT | Severe Thunderstorm Warning | BIS | Hettinger | 58 min |
| Aug 30, 4:43 PM CDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 47 min |
| Aug 30, 4:46 PM CDT | Areal Flood Advisory | BIS | Morton | 3 hr |
| Aug 30, 5:00 PM CDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 60 min |
| Aug 30, 5:28 PM CDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 47 min |
| Aug 30, 5:29 PM CDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 61 min |
| Aug 30, 5:43 PM CDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 47 min |
| Aug 30, 5:54 PM CDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 38 min |
| Aug 30, 6:02 PM CDT | Severe Thunderstorm Warning | BIS | Grant, Morton, Sioux | 58 min |
| Aug 30, 6:30 PM CDT | Severe Thunderstorm Warning | BIS | Adams | 60 min |
| Aug 30, 6:49 PM CDT | Severe Thunderstorm Warning | BIS | Emmons, Grant, Morton, Sioux | 35 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.