Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 161, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 5:43 PM CDT for McLean County, Mercer 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, 5:43 PM CDT (22:43 UTC)
- Expired
- Aug 30, 2021, 6:30 PM CDT
- In force
- 47 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 50.0 mph
Counties McLean County, ND, Mercer County, ND
The radar
The Bismarck radar (KBIS), 80 km from the middle of the area, began a volume at 22:47 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, 5:55 PM CDT | HAIL 1 | 6 Se White Shield, ND | REPORT FROM AUGUST 30 STORMS. MAINLY DIMES, A FEW QUARTERS. |
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 30, 1:38 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.7 hours before the alert went out and 83 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.
139
WUUS53 KBIS 302243
SVRBIS
NDC055-057-302330-
/O.NEW.KBIS.SV.W.0161.210830T2243Z-210830T2330Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
543 PM CDT Mon Aug 30 2021
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Central McLean County in south central North Dakota...
Northeastern Mercer County in south central North Dakota...
* Until 630 PM CDT.
* At 543 PM CDT, severe thunderstorms were located along a line
extending from 7 miles southeast of Roseglen to near Stanton, and
are nearly stationary.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
* These severe thunderstorms will remain over mainly rural areas of
central McLean and northeastern Mercer Counties, including the
following locations... Dakota Waters Recreation Area and Emmet.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4758 10193 4769 10168 4730 10107 4729 10112
4728 10119 4726 10119 4725 10123 4727 10126
4725 10126 4724 10131 4724 10148
TIME...MOT...LOC 2243Z 122DEG 3KT 4765 10176 4735 10141
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JP MARTIN2 follow-up statements
214
WWUS53 KBIS 302309
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
609 PM CDT Mon Aug 30 2021
NDC055-057-302330-
/O.CON.KBIS.SV.W.0161.000000T0000Z-210830T2330Z/
McLean ND-Mercer ND-
609 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR SOUTH CENTRAL MCLEAN AND NORTHEASTERN MERCER COUNTIES...
At 609 PM CDT, severe thunderstorms were located along a line
extending from Beulah Bay Recreation Area to near Stanton, moving
east at 15 mph.
HAZARD...Half dollar size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Stanton, Hazen Bay Recreation Area, Beulah Bay Recreation Area and
Dakota Waters Recreation Area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4750 10183 4756 10166 4729 10116 4729 10112
4728 10119 4726 10119 4725 10123 4727 10126
4725 10126 4724 10131 4724 10148
TIME...MOT...LOC 2309Z 248DEG 14KT 4752 10173 4727 10134
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH
$$
JP MARTIN632
WWUS53 KBIS 302328
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
628 PM CDT Mon Aug 30 2021
NDC055-057-302338-
/O.EXP.KBIS.SV.W.0161.000000T0000Z-210830T2330Z/
McLean ND-Mercer ND-
628 PM CDT Mon Aug 30 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTH CENTRAL MCLEAN AND
NORTHEASTERN MERCER COUNTIES WILL EXPIRE AT 630 PM CDT...
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However small hail
and heavy rain are still possible with these thunderstorms.
A Severe Thunderstorm Watch remains in effect until 700 PM CDT for
south central North Dakota.
LAT...LON 4750 10183 4756 10166 4729 10116 4729 10112
4728 10119 4726 10119 4725 10123 4727 10126
4725 10126 4724 10131 4724 10148
TIME...MOT...LOC 2328Z 122DEG 3KT 4753 10175 4728 10136
$$
TELKENThe 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, 12:13 PM CDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 47 min |
| 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, 5:54 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.