Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 163, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 5:02 PM MDT for Grant County, Morton County, Sioux County, North Dakota. It was in force for 58 min. 3 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 30, 2021, 5:02 PM MDT (23:02 UTC)
- Expired
- Aug 30, 2021, 6:00 PM MDT
- In force
- 58 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
- Damage threat
- Destructive
- Hail
- 2.75 in
- Wind
- 60.0 mph
Counties Grant County, ND, Morton County, ND, Sioux County, ND
The radar
The Bismarck radar (KBIS), 47 km from the middle of the area, began a volume at 23:05 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, 5:05 PM MDT | HAIL 1.5 | 5 Nne Flasher, ND | REPORT FROM AUGUST 30 STORM. CROPS WERE DAMAGED AND SOME WINDOWS WERE BROKEN. ADDITIONAL NEIGHBORS ALSO HAD BROKEN WINDOWS. |
| Aug 30, 5:05 PM MDT | HAIL 2.5 | 4 N Flasher, ND | REPORT FROM AUGUST 30 STORMS. TENNIS BALL SIZE HAIL COMBINED WITH 60 MPH WIND GUSTS TO CAUSE EXTENSIVE DAMAGE. ALL WINDOWS WERE BROKEN OUT ON NORTH SIDE OF TWO HOMES. DENTED STEEL SIDING ON ONE, AND DESTROYED VINYL SIDING ON THE OTHER. FIVE VEHICLE WINDOWS WER |
| Aug 30, 5:05 PM MDT | HAIL 2.75 | 5 Ne Flasher, ND | REPORT FROM AUGUST 30TH STORM. TIME ESTIMATED FROM RADAR. HAILED FOR ABOUT ONE HALF HOUR. CROP WAS DESTROYED. |
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, 12:38 PM MDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 49 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.
180
WUUS53 KBIS 302302
SVRBIS
NDC037-059-085-310000-
/O.NEW.KBIS.SV.W.0163.210830T2302Z-210831T0000Z/
BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
602 PM CDT Mon Aug 30 2021
The National Weather Service in Bismarck has issued a
* Severe Thunderstorm Warning for...
Northeastern Sioux County in south central North Dakota...
Southeastern Morton County in south central North Dakota...
East central Grant County in south central North Dakota...
* Until 700 PM CDT/600 PM MDT/.
* At 601 PM CDT/501 PM MDT/, a severe thunderstorm was located 5
miles northeast of Flasher, or 25 miles southwest of Mandan, moving
southeast at 15 mph.
THIS IS A DESTRUCTIVE STORM FOR THE FLASHER AND BREIEN AREAS.
HAZARD...Baseball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be severely injured.
Expect shattered windows, extensive damage to roofs,
siding, and vehicles.
* Locations impacted include...
Solen and Breien.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to shelter inside a strong building, and stay away from
windows.
&&
LAT...LON 4642 10134 4667 10110 4639 10064 4620 10104
TIME...MOT...LOC 2301Z 307DEG 12KT 4650 10112
THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CJS2 follow-up statements
263
WWUS53 KBIS 302321
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
621 PM CDT Mon Aug 30 2021
NDC037-059-085-310000-
/O.CON.KBIS.SV.W.0163.000000T0000Z-210831T0000Z/
Sioux ND-Morton ND-Grant ND-
621 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM
CDT/600 PM MDT/ FOR NORTHEASTERN SIOUX...SOUTHEASTERN MORTON AND EAST
CENTRAL GRANT COUNTIES...
At 620 PM CDT/520 PM MDT/, a severe thunderstorm was located 9 miles
west of Solen, or 24 miles north of Selfridge, moving southeast at 20
mph.
HAZARD...Golf ball size hail and 60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect wind
damage to roofs, siding, and trees.
Locations impacted include...
Solen and Breien.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4642 10134 4667 10110 4639 10064 4620 10104
TIME...MOT...LOC 2320Z 315DEG 19KT 4640 10099
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CJS562
WWUS53 KBIS 302334
SVSBIS
Severe Weather Statement
National Weather Service Bismarck ND
634 PM CDT Mon Aug 30 2021
NDC037-059-085-310000-
/O.CON.KBIS.SV.W.0163.000000T0000Z-210831T0000Z/
Sioux ND-Morton ND-Grant ND-
634 PM CDT Mon Aug 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM
CDT/600 PM MDT/ FOR NORTHEASTERN SIOUX...SOUTHEASTERN MORTON AND
EASTERN GRANT COUNTIES...
At 634 PM CDT/534 PM MDT/, a severe thunderstorm was located 6 miles
west of Solen, or 22 miles north of Selfridge, moving southeast at 15
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...
Solen and Breien.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4631 10118 4660 10099 4639 10064 4620 10104
TIME...MOT...LOC 2334Z 307DEG 12KT 4637 10094
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CJSThe office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 30, 9:51 AM MDT | Special Weather Statement | BIS | Oliver | 24 min |
| Aug 30, 9:54 AM MDT | Severe Thunderstorm Warning | BIS | Oliver | 36 min |
| Aug 30, 10:28 AM MDT | Severe Thunderstorm Warning | BIS | Oliver | 47 min |
| Aug 30, 10:33 AM MDT | Areal Flood Advisory | BIS | Oliver | 3 hr |
| Aug 30, 10:46 AM MDT | Flash Flood Warning | BIS | Oliver | 3 hr |
| Aug 30, 11:13 AM MDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 47 min |
| Aug 30, 11:58 AM MDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 47 min |
| Aug 30, 12:02 PM MDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 43 min |
| Aug 30, 12:42 PM MDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 63 min |
| Aug 30, 12:44 PM MDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 61 min |
| Aug 30, 1:17 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 58 min |
| Aug 30, 2:15 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 60 min |
| Aug 30, 2:48 PM MDT | Severe Thunderstorm Warning | BIS | McLean | 42 min |
| Aug 30, 3:16 PM MDT | Severe Thunderstorm Warning | BIS | Morton | 59 min |
| Aug 30, 3:32 PM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 58 min |
| Aug 30, 3:43 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 47 min |
| Aug 30, 3:46 PM MDT | Areal Flood Advisory | BIS | Morton | 3 hr |
| Aug 30, 4:00 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 60 min |
| Aug 30, 4:28 PM MDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 47 min |
| Aug 30, 4:29 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Hettinger | 61 min |
| Aug 30, 4:43 PM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 47 min |
| Aug 30, 4:54 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 38 min |
| Aug 30, 5:30 PM MDT | Severe Thunderstorm Warning | BIS | Adams | 60 min |
| Aug 30, 5:49 PM MDT | 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.