Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 160, NWS Bismarck, ND

August 30, 2021Adams County, Hettinger County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 30, 2021, 4:29 PM MDT for Adams County, Hettinger County, North Dakota. It was in force for 61 min. 2 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, 4:29 PM MDT (22:29 UTC)
Expired
Aug 30, 2021, 5:30 PM MDT
In force
61 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon
Damage threat
Destructive
Hail
2.75 in
Wind
60.0 mph

Counties Adams County, ND, Hettinger County, ND

The radar

The Bismarck radar (KBIS), 126 km from the middle of the area, began a volume at 22:28 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, 4:53 PM MDTHAIL 35 S Mott, NDTIME ESTIMATED FROM RADAR. PHOTOS RELAYED THROUGH BROADCAST MEDIA.
Aug 30, 4:59 PM MDTHAIL 37 Wsw Mott, NDPHOTO RELAYED THROUGH SOCIAL MEDIA, INCLUDING SMASHED WINDSHIELD OF CAR. TIME ESTIMATED FROM RADAR BUT REPORT INCLUDED VERY LARGE HAIL ALONG HIGHWAY 8 BETWEEN HETTINGER AND MOTT.

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.

IssuedProductOfficeLasted
Aug 30, 12:38 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.5 hours before the alert went out and 130 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.

599 
WUUS53 KBIS 302229
SVRBIS
NDC001-041-302330-
/O.NEW.KBIS.SV.W.0160.210830T2229Z-210830T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
429 PM MDT Mon Aug 30 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southeastern Hettinger County in southwestern North Dakota...
  Northeastern Adams County in southwestern North Dakota...

* Until 530 PM MDT.

* At 429 PM MDT, a severe thunderstorm was located near Mott, moving
  southeast at 15 mph.

  THIS IS A DESTRUCTIVE STORM FOR SOUTHEASTERN HETTINGER AND 
  NORTHEASTERN ADAMS COUNTIES.

  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.

* This severe thunderstorm will remain over mainly rural areas of
  southeastern Hettinger and northeastern Adams Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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 4640 10262 4649 10224 4631 10204 4628 10205
      4628 10201 4626 10200 4605 10200 4604 10265
TIME...MOT...LOC 2229Z 337DEG 12KT 4634 10242 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CJS
2 follow-up statements
456 
WWUS53 KBIS 302258
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
458 PM MDT Mon Aug 30 2021

NDC001-041-302330-
/O.CON.KBIS.SV.W.0160.000000T0000Z-210830T2330Z/
Hettinger ND-Adams ND-
458 PM MDT Mon Aug 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR SOUTHEASTERN HETTINGER AND NORTHEASTERN ADAMS COUNTIES...

At 457 PM MDT, a severe thunderstorm was located 13 miles southwest
of Mott, moving south at 15 mph.

THIS IS A DESTRUCTIVE STORM FOR SOUTHEASTERN HETTINGER AND 
NORTHEASTERN ADAMS COUNTIES.

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...
Rural portions of southeastern Hettinger and northeastern Adams 
Counties. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 4634 10260 4644 10218 4631 10204 4628 10205
      4628 10201 4626 10200 4605 10200 4604 10265
TIME...MOT...LOC 2257Z 358DEG 14KT 4621 10248 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CJS
585 
WWUS53 KBIS 302316
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
516 PM MDT Mon Aug 30 2021

NDC001-041-302330-
/O.CON.KBIS.SV.W.0160.000000T0000Z-210830T2330Z/
Hettinger ND-Adams ND-
516 PM MDT Mon Aug 30 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM MDT
FOR SOUTHEASTERN HETTINGER AND NORTHEASTERN ADAMS COUNTIES...

At 515 PM MDT, a severe thunderstorm was located 12 miles north of
Haynes, or 13 miles northeast of Hettinger, moving southeast at 15
mph.

THIS IS A DESTRUCTIVE STORM FOR PARTS OF SOUTHEASTERN HETTINGER AND 
NORTHEASTERN ADAMS COUNTIES.

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.

This severe thunderstorm will remain over mainly rural areas of
southeastern Hettinger and northeastern Adams Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 4634 10260 4628 10210 4626 10200 4605 10200
      4604 10265
TIME...MOT...LOC 2315Z 337DEG 12KT 4615 10245 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...2.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

CJS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 9:51 AM MDTSpecial Weather StatementBISOliver24 min
Aug 30, 9:54 AM MDTSevere Thunderstorm WarningBISOliver36 min
Aug 30, 10:28 AM MDTSevere Thunderstorm Warning Considerable damage threatBISOliver47 min
Aug 30, 10:33 AM MDTAreal Flood AdvisoryBISOliver3 hr
Aug 30, 10:46 AM MDTFlash Flood WarningBISOliver3 hr
Aug 30, 11:13 AM MDTSevere Thunderstorm WarningBISMorton, Oliver47 min
Aug 30, 11:58 AM MDTSevere Thunderstorm WarningBISMorton, Oliver47 min
Aug 30, 12:02 PM MDTSevere Thunderstorm WarningBISMercer, Oliver43 min
Aug 30, 12:42 PM MDTSevere Thunderstorm Warning Considerable damage threatBISMorton, Oliver63 min
Aug 30, 12:44 PM MDTSevere Thunderstorm WarningBISMercer, Oliver61 min
Aug 30, 1:17 PM MDTSevere Thunderstorm Warning Destructive damage threatBISMorton58 min
Aug 30, 2:15 PM MDTSevere Thunderstorm Warning Considerable damage threatBISMorton60 min
Aug 30, 2:48 PM MDTSevere Thunderstorm WarningBISMcLean42 min
Aug 30, 3:16 PM MDTSevere Thunderstorm Warning Considerable damage threatBISMorton59 min
Aug 30, 3:32 PM MDTSevere Thunderstorm WarningBISHettinger58 min
Aug 30, 3:43 PM MDTSevere Thunderstorm WarningBISGrant, Morton47 min
Aug 30, 3:46 PM MDTAreal Flood AdvisoryBISMorton3 hr
Aug 30, 4:00 PM MDTSevere Thunderstorm Warning Considerable damage threatBISGrant, Morton60 min
Aug 30, 4:28 PM MDTSevere Thunderstorm WarningBISMercer, Oliver47 min
Aug 30, 4:43 PM MDTSevere Thunderstorm WarningBISMcLean, Mercer47 min
Aug 30, 4:54 PM MDTSevere Thunderstorm WarningBISGrant, Morton38 min
Aug 30, 5:02 PM MDTSevere Thunderstorm Warning Destructive damage threatBISGrant, Morton, Sioux58 min
Aug 30, 5:30 PM MDTSevere Thunderstorm Warning Considerable damage threatBISAdams60 min
Aug 30, 5:49 PM MDTSevere 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.