Alert archive / North Dakota / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 102, NWS Bismarck, ND

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

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 16, 2021, 8:00 PM CDT for Mercer County, Oliver County, North Dakota. It was in force for 30 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, 8:00 PM CDT (01:00 UTC)
Expired: Jul 16, 2021, 8:30 PM CDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties Mercer County, ND, Oliver County, ND

The radar

The Bismarck radar (KBIS), 83 km from the middle of the area, began a volume at 00:59 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
Jul 16, 8:06 PM CDT	HAIL 1	9 S Beulah, ND
Jul 16, 8:30 PM CDT	HAIL 2	13 Ssw Beulah, ND	HAIL RANGED FROM QUARTER TO HEN EGG IN SIZE.

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, 1.0 hours before the alert went out and 87 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: 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.

443 
WUUS53 KBIS 170100
SVRBIS
NDC057-065-170130-
/O.NEW.KBIS.SV.W.0102.210717T0100Z-210717T0130Z/

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

The National Weather Service in Bismarck has issued a

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

* Until 830 PM CDT.

* At 800 PM CDT, a severe thunderstorm was located 9 miles south of
  Beulah, and is nearly stationary.

  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...
  Beulah.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4698 10192 4728 10186 4726 10153 4698 10151
TIME...MOT...LOC 0100Z 338DEG 4KT 4713 10177 

HAIL...1.25IN
WIND...60MPH
 
$$

GALE

1 follow-up statement

387 
WWUS53 KBIS 170110
SVSBIS

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

NDC057-065-170130-
/O.CON.KBIS.SV.W.0102.000000T0000Z-210717T0130Z/
Oliver ND-Mercer ND-
810 PM CDT Fri Jul 16 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 830 PM CDT
FOR WESTERN OLIVER AND SOUTH CENTRAL MERCER COUNTIES...

At 809 PM CDT, a severe thunderstorm was located 10 miles south of
Beulah, moving south 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...
Beulah.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4698 10192 4728 10186 4726 10153 4698 10151
TIME...MOT...LOC 0109Z 015DEG 9KT 4712 10180 

HAIL...1.50IN
WIND...60MPH
 
$$

GALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 16, 7:04 PM CDT	Special Weather Statement	BIS	Oliver	26 min
Jul 16, 7:08 PM CDT	Special Weather Statement	BIS	Slope	37 min
Jul 16, 7:52 PM CDT	Special Weather Statement	BIS	Mercer	23 min
Jul 16, 8:29 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Oliver	31 min
Jul 16, 8:57 PM CDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Stark	33 min
Jul 16, 9:28 PM CDT	Severe Thunderstorm Warning	BIS	Morton, Stark	22 min
Jul 16, 11:39 PM CDT	Special Weather Statement	BIS	Slope	51 min
Jul 17, 12:55 AM CDT	Special Weather Statement	BIS	Sheridan	35 min
Jul 17, 1:32 AM CDT	Special Weather Statement	BIS	Sheridan	28 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.