Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 157, NWS Bismarck, ND

August 30, 2021Grant County, Morton County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 3:43 PM MDT for Grant County, Morton 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, 3:43 PM MDT (21:43 UTC)
Expired: Aug 30, 2021, 4:30 PM MDT
In force: 47 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Grant County, ND, Morton County, ND

The radar

The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 21:47 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, 3:50 PM MDT	HAIL 1.75	6 Sse Glen Ullin, ND	HAIL REPORT FROM AUGUST 30 STORM. NOT MUCH WIND WITH THE STORM AT THIS LOCATION.

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, 9.7 hours before the alert went out and 79 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted.

933 
WUUS53 KBIS 302143
SVRBIS
NDC037-059-302230-
/O.NEW.KBIS.SV.W.0157.210830T2143Z-210830T2230Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
443 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...
  North central Grant County in south central North Dakota...

* Until 530 PM CDT/430 PM MDT/.

* At 443 PM CDT/343 PM MDT/, a severe thunderstorm was located near
  Glen Ullin, moving southeast at 10 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...
  Almont.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4675 10196 4690 10175 4676 10132 4649 10166
TIME...MOT...LOC 2143Z 315DEG 9KT 4677 10178 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CJS

2 follow-up statements

080 
WWUS53 KBIS 302206
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
506 PM CDT Mon Aug 30 2021

NDC037-059-302230-
/O.CON.KBIS.SV.W.0157.000000T0000Z-210830T2230Z/
Morton ND-Grant ND-
506 PM CDT Mon Aug 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM
CDT/430 PM MDT/ FOR NORTHWESTERN MORTON AND NORTH CENTRAL GRANT
COUNTIES...

At 506 PM CDT/406 PM MDT/, a severe thunderstorm was located 7 miles
southeast of Glen Ullin, moving southeast at 10 mph.

HAZARD...60 mph wind gusts and half dollar size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Glen Ullin and Almont. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4675 10196 4690 10175 4676 10132 4649 10166
TIME...MOT...LOC 2206Z 315DEG 9KT 4673 10172 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.25 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CJS

284 
WWUS53 KBIS 302233
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
533 PM CDT Mon Aug 30 2021

NDC037-059-302241-
/O.EXP.KBIS.SV.W.0157.000000T0000Z-210830T2230Z/
Morton ND-Grant ND-
533 PM CDT Mon Aug 30 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MORTON AND NORTH
CENTRAL GRANT COUNTIES HAS EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire. 

Remember, a Severe Thunderstorm Warning remains in effect for parts 
of northeastern Grant and central Morton Counties until 600 PM CDT 
or 500 PM MDT.

LAT...LON 4675 10196 4690 10175 4676 10132 4649 10166
TIME...MOT...LOC 2231Z 315DEG 9KT 4669 10166 

$$

CJS

The 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 Considerable damage threat	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 Considerable damage threat	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 Destructive damage threat	BIS	Morton	58 min
Aug 30, 2:15 PM MDT	Severe Thunderstorm Warning Considerable damage threat	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 Considerable damage threat	BIS	Morton	59 min
Aug 30, 3:32 PM MDT	Severe Thunderstorm Warning	BIS	Hettinger	58 min
Aug 30, 3:46 PM MDT	Areal Flood Advisory	BIS	Morton	3 hr
Aug 30, 4:00 PM MDT	Severe Thunderstorm Warning Considerable damage threat	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 Destructive damage threat	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, 5:02 PM MDT	Severe Thunderstorm Warning Destructive damage threat	BIS	Grant, Morton, Sioux	58 min
Aug 30, 5:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	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, 2021 Every 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.