Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 146, NWS Bismarck, ND

August 30, 2021Oliver County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 11:28 AM CDT for 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, 11:28 AM CDT (16:28 UTC)
Expired
Aug 30, 2021, 12:15 PM CDT
In force
47 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon
Damage threat
Considerable
Hail
1.75 in
Wind
60.0 mph

County Oliver County, ND

The radar

The Bismarck radar (KBIS), 78 km from the middle of the area, began a volume at 16:31 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

TimeReportWhereRemark
Aug 30, 12:14 PM CDTHAIL 1.510 W Hannover, NDRELAYED 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, 4.5 hours before the alert went out and 82 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-pSkew-T log-p diagram, Bismarck Municip, ND at 12:00Z on 2021-08-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 8 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 2021-08-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 93 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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.

006 
WUUS53 KBIS 301628
SVRBIS
NDC065-301715-
/O.NEW.KBIS.SV.W.0146.210830T1628Z-210830T1715Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
1128 AM CDT Mon Aug 30 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Western Oliver County in south central North Dakota...

* Until 1215 PM CDT.

* At 1127 AM CDT, a severe thunderstorm was located 9 miles west of
  Hannover, or 11 miles southeast of Beulah, and is nearly
  stationary.

  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 possibly 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 4715 10176 4724 10174 4724 10162 4720 10132
      4701 10149
TIME...MOT...LOC 1627Z 304DEG 4KT 4715 10161 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SCHILD
1 follow-up statement
483 
WWUS53 KBIS 301650
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
1150 AM CDT Mon Aug 30 2021

NDC065-301715-
/O.CON.KBIS.SV.W.0146.000000T0000Z-210830T1715Z/
Oliver ND-
1150 AM CDT Mon Aug 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 PM CDT
FOR NORTHWESTERN OLIVER COUNTY...

At 1149 AM CDT, a severe thunderstorm was located 9 miles south of
Hazen, or 10 miles southeast of Beulah, and is nearly stationary.

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
northwestern Oliver County.

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 4715 10176 4724 10174 4724 10162 4721 10138
      4705 10157
TIME...MOT...LOC 1649Z 299DEG 1KT 4716 10162 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

SCHILD

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Aug 30, 10:51 AM CDTSpecial Weather StatementBISOliver24 min
Aug 30, 10:54 AM CDTSevere Thunderstorm WarningBISOliver36 min
Aug 30, 11:33 AM CDTAreal Flood AdvisoryBISOliver3 hr
Aug 30, 11:46 AM CDTFlash Flood WarningBISOliver3 hr
Aug 30, 12:13 PM CDTSevere Thunderstorm WarningBISMorton, Oliver47 min
Aug 30, 12:58 PM CDTSevere Thunderstorm WarningBISMorton, Oliver47 min
Aug 30, 1:02 PM CDTSevere Thunderstorm WarningBISMercer, Oliver43 min
Aug 30, 1:42 PM CDTSevere Thunderstorm Warning Considerable damage threatBISMorton, Oliver63 min
Aug 30, 1:44 PM CDTSevere Thunderstorm WarningBISMercer, Oliver61 min
Aug 30, 2:17 PM CDTSevere Thunderstorm Warning Destructive damage threatBISMorton58 min
Aug 30, 3:15 PM CDTSevere Thunderstorm Warning Considerable damage threatBISMorton60 min
Aug 30, 3:48 PM CDTSevere Thunderstorm WarningBISMcLean42 min
Aug 30, 4:16 PM CDTSevere Thunderstorm Warning Considerable damage threatBISMorton59 min
Aug 30, 4:32 PM CDTSevere Thunderstorm WarningBISHettinger58 min
Aug 30, 4:43 PM CDTSevere Thunderstorm WarningBISGrant, Morton47 min
Aug 30, 4:46 PM CDTAreal Flood AdvisoryBISMorton3 hr
Aug 30, 5:00 PM CDTSevere Thunderstorm Warning Considerable damage threatBISGrant, Morton60 min
Aug 30, 5:28 PM CDTSevere Thunderstorm WarningBISMercer, Oliver47 min
Aug 30, 5:29 PM CDTSevere Thunderstorm Warning Destructive damage threatBISAdams, Hettinger61 min
Aug 30, 5:43 PM CDTSevere Thunderstorm WarningBISMcLean, Mercer47 min
Aug 30, 5:54 PM CDTSevere Thunderstorm WarningBISGrant, Morton38 min
Aug 30, 6:02 PM CDTSevere Thunderstorm Warning Destructive damage threatBISGrant, Morton, Sioux58 min
Aug 30, 6:30 PM CDTSevere Thunderstorm Warning Considerable damage threatBISAdams60 min
Aug 30, 6:49 PM CDTSevere Thunderstorm WarningBISEmmons, Grant, Morton, Sioux35 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.