Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 103, NWS Bismarck, ND

July 16, 2021Mercer County, Oliver County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 16, 2021, 8:29 PM CDT for Mercer County, Oliver County, North Dakota. It was in force for 31 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
Jul 16, 2021, 8:29 PM CDT (01:29 UTC)
Expired
Jul 16, 2021, 9:00 PM CDT
In force
31 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Mercer County, ND, Oliver County, ND

The radar

The Bismarck radar (KBIS), 92 km from the middle of the area, began a volume at 01:29 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
Jul 16, 8:30 PM CDTHAIL 213 Ssw Beulah, NDHAIL RANGED FROM QUARTER TO HEN EGG IN SIZE.
Jul 16, 9:08 PM CDTHAIL 1.757 Nne Hebron, NDRELAYED TO NWS BY BROADCAST MEDIA.

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, 1.5 hours before the alert went out and 97 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 00:00Z on 2021-07-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1026 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 00:00Z on 2021-07-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 92 square meters per square second.1939Sfc1 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
1026 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1949 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
454 m²/s²
Significant tornado parameter
0.1
Supercell composite
11.5

Open this sounding in Storm Lab

The text

As transmitted.

060 
WUUS53 KBIS 170129
SVRBIS
NDC057-065-170200-
/O.NEW.KBIS.SV.W.0103.210717T0129Z-210717T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Bismarck ND
829 PM CDT Fri Jul 16 2021

The National Weather Service in Bismarck has issued a

* Severe Thunderstorm Warning for...
  Southwestern Oliver County in south central North Dakota...
  South central Mercer County in south central North Dakota...

* Until 900 PM CDT.

* At 827 PM CDT, a severe thunderstorm was located 13 miles south of
  Beulah, moving southwest 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.

* This severe thunderstorm will remain over mainly rural areas of
  southwestern Oliver and south central Mercer Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4698 10214 4725 10183 4717 10166 4698 10169
TIME...MOT...LOC 0127Z 022DEG 15KT 4708 10186 

HAIL...1.00IN
WIND...60MPH
 
$$

GALE
2 follow-up statements
726 
WWUS53 KBIS 170138
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
838 PM CDT Fri Jul 16 2021

NDC057-065-170200-
/O.CON.KBIS.SV.W.0103.000000T0000Z-210717T0200Z/
Oliver ND-Mercer ND-
838 PM CDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTHWESTERN OLIVER AND SOUTH CENTRAL MERCER COUNTIES...

At 838 PM CDT, a severe thunderstorm was located 12 miles northeast
of Hebron, or 15 miles southwest of Beulah, moving southwest 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.

This severe thunderstorm will remain over mainly rural areas of
southwestern Oliver and south central Mercer Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4698 10214 4717 10192 4711 10167 4698 10169
TIME...MOT...LOC 0138Z 027DEG 15KT 4705 10191 

HAIL...1.00IN
WIND...60MPH
 
$$

GALE
341 
WWUS53 KBIS 170149
SVSBIS

Severe Weather Statement
National Weather Service Bismarck ND
849 PM CDT Fri Jul 16 2021

NDC065-170158-
/O.CAN.KBIS.SV.W.0103.000000T0000Z-210717T0200Z/
Oliver ND-
849 PM CDT Fri Jul 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN OLIVER COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 4713 10197 4710 10177 4698 10179 4698 10214
TIME...MOT...LOC 0148Z 077DEG 15KT 4706 10199 

$$

NDC057-170200-
/O.CON.KBIS.SV.W.0103.000000T0000Z-210717T0200Z/
Mercer ND-
849 PM CDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 900 PM CDT
FOR SOUTH CENTRAL MERCER COUNTY...

At 848 PM CDT, a severe thunderstorm was located 10 miles north of
Hebron, or 17 miles southwest of Beulah, moving west at 20 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.

This severe thunderstorm will remain over mainly rural areas of south
central Mercer County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4713 10197 4710 10177 4698 10179 4698 10214
TIME...MOT...LOC 0148Z 077DEG 15KT 4706 10199 

HAIL...1.00IN
WIND...60MPH
 
$$

GALE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 7:04 PM CDTSpecial Weather StatementBISOliver26 min
Jul 16, 7:08 PM CDTSpecial Weather StatementBISSlope37 min
Jul 16, 7:52 PM CDTSpecial Weather StatementBISMercer23 min
Jul 16, 8:00 PM CDTSevere Thunderstorm WarningBISMercer, Oliver30 min
Jul 16, 8:57 PM CDTSevere Thunderstorm WarningBISMercer, Morton, Stark33 min
Jul 16, 9:28 PM CDTSevere Thunderstorm WarningBISMorton, Stark22 min
Jul 16, 11:39 PM CDTSpecial Weather StatementBISSlope51 min
Jul 17, 12:55 AM CDTSpecial Weather StatementBISSheridan35 min
Jul 17, 1:32 AM CDTSpecial Weather StatementBISSheridan28 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.