Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 169, NWS Bismarck, ND

September 13, 2021Hettinger County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Sep 13, 2021, 5:54 AM MDT for Hettinger County, North Dakota. It was in force for 30 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: Sep 13, 2021, 5:54 AM MDT (11:54 UTC)
Expired: Sep 13, 2021, 6:24 AM MDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Hettinger County, ND

The radar

The Bismarck radar (KBIS), 132 km from the middle of the area, began a volume at 11:55 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
Sep 13, 6:00 AM MDT	HAIL 1	5 S Mott, ND	MOSTLY PEA SIZED HAIL BUT A FEW QUARTERS.

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 00:00Z, 11.9 hours before the alert went out and 136 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2049 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 204 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

262 
WUUS53 KBIS 131154
SVRBIS
NDC041-131245-
/O.NEW.KBIS.SV.W.0169.210913T1154Z-210913T1245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
554 AM MDT Mon Sep 13 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Eastern Hettinger County in southwestern North Dakota...

* Until 645 AM MDT.

* At 553 AM MDT, a severe thunderstorm was located near Mott, moving
  northeast at 25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Mott around 605 AM MDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4626 10250 4628 10250 4628 10253 4630 10255
      4658 10244 4651 10210 4633 10205 4631 10205
      4621 10243
TIME...MOT...LOC 1153Z 229DEG 22KT 4632 10236 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

HAMILTON

3 follow-up statements

579 
WWUS53 KBIS 131205
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
605 AM MDT Mon Sep 13 2021

NDC041-131245-
/O.CON.KBIS.SV.W.0169.000000T0000Z-210913T1245Z/
Hettinger ND-
605 AM MDT Mon Sep 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 AM MDT
FOR EASTERN HETTINGER COUNTY...

At 604 AM MDT, a severe thunderstorm was located over Mott, moving 
northeast at 25 mph.

HAZARD...Quarter size hail. 

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe thunderstorm will remain over mainly rural areas of 
eastern Hettinger County, including the following locations... 
Mott, Burt and Bentley.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4626 10250 4628 10250 4628 10253 4630 10255
      4658 10244 4651 10210 4633 10205 4631 10205
      4621 10243
TIME...MOT...LOC 1204Z 229DEG 22KT 4636 10229 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

HAMILTON

586 
WWUS53 KBIS 131212
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
612 AM MDT Mon Sep 13 2021

NDC041-131245-
/O.CON.KBIS.SV.W.0169.000000T0000Z-210913T1245Z/
Hettinger ND-
612 AM MDT Mon Sep 13 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 AM MDT
FOR SOUTHEASTERN HETTINGER COUNTY...

At 611 AM MDT, a severe thunderstorm was located 2 miles 
northeast of Mott, moving northeast at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Mott, Burt and Bentley. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4642 10238 4653 10227 4651 10210 4633 10205
      4631 10205 4626 10225 4637 10234
TIME...MOT...LOC 1211Z 223DEG 22KT 4641 10226 

HAIL THREAT...OBSERVED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...<50 MPH

$$

HAMILTON

686 
WWUS53 KBIS 131224
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
624 AM MDT Mon Sep 13 2021

NDC041-131233-
/O.CAN.KBIS.SV.W.0169.000000T0000Z-210913T1245Z/
Hettinger ND-
624 AM MDT Mon Sep 13 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HETTINGER COUNTY
IS CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.  However small hail is still possible with this
thunderstorm over eastern Hettinger county.

LAT...LON 4642 10238 4653 10227 4651 10210 4633 10205
      4631 10205 4626 10225 4637 10234
TIME...MOT...LOC 1222Z 229DEG 22KT 4646 10218 

$$

HAMILTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 5:04 AM MDT	Special Weather Statement	BIS	Adams	26 min
Sep 13, 5:29 AM MDT	Special Weather Statement	BIS	Adams	31 min
Sep 13, 6:19 AM MDT	Special Weather Statement	BIS	Hettinger	26 min
Sep 13, 6:50 AM MDT	Special Weather Statement	BIS	Grant	25 min
Sep 13, 9:07 AM MDT	Special Weather Statement	BIS	Emmons	38 min
Sep 13, 9:25 AM MDT	Special Weather Statement	BIS	Wells	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.