Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Bismarck, ND

June 18, 2011Mercer County, Morton County, Oliver County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 18, 2011, 5:01 PM CDT for Mercer County, Morton County, Oliver County, North Dakota. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 18, 2011, 5:01 PM CDT (22:01 UTC)
Expired: Jun 18, 2011, 6:00 PM CDT
In force: 59 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Mercer County, ND, Morton County, ND, Oliver County, ND

The radar

The Bismarck radar (KBIS), 94 km from the middle of the area, began a volume at 22:05 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.0 hours before the alert went out and 98 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: 1532 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 82 m²/s²
0-3 km storm-relative helicity: 43 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

312 
WUUS53 KBIS 182201
SVRBIS
NDC057-059-065-182300-
/O.NEW.KBIS.SV.W.0039.110618T2201Z-110618T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
501 PM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MERCER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  NORTHWESTERN MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  WESTERN OLIVER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 600 PM CDT.

* AT 500 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 12 MILES NORTH OF HEBRON TO 6
  MILES SOUTHEAST OF HEBRON...AND MOVING NORTHEAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ZAP...BEULAH...HAZEN AND HANNOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

&&

LAT...LON 4698 10210 4698 10211 4710 10213 4744 10183
      4720 10128 4680 10186 4678 10209
TIME...MOT...LOC 2201Z 220DEG 19KT 4707 10196 4685 10195
WIND...HAIL 60MPH 1.00IN

$$

AYD

3 follow-up statements

653 
WWUS53 KBIS 182214
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
514 PM CDT SAT JUN 18 2011

NDC057-059-065-182300-
/O.CON.KBIS.SV.W.0039.000000T0000Z-110618T2300Z/
MERCER ND-OLIVER ND-MORTON ND-
514 PM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
MORTON...WESTERN OLIVER AND MERCER COUNTIES UNTIL 600 PM CDT...

AT 509 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM 17 TO 25 MILES SOUTHWEST OF 
BEULAH...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  ZAP...BEULAH...HAZEN AND HANNOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

VERY HEAVY RAIN IS ALSO OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4698 10210 4698 10211 4710 10213 4744 10183
      4720 10128 4684 10181 4684 10209
TIME...MOT...LOC 2213Z 225DEG 22KT 4707 10183 4691 10188
WIND...HAIL 60MPH 1.00IN

$$

AYD

317 
WWUS53 KBIS 182234
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
534 PM CDT SAT JUN 18 2011

NDC057-059-065-182300-
/O.CON.KBIS.SV.W.0039.000000T0000Z-110618T2300Z/
MERCER ND-OLIVER ND-MORTON ND-
534 PM CDT SAT JUN 18 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
MORTON...WESTERN OLIVER AND MERCER COUNTIES UNTIL 600 PM CDT...

AT 532 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE 
LOCATED ALONG A LINE EXTENDING FROM 11 TO 24 MILES SOUTH OF 
BEULAH...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  ZAP...BEULAH...HAZEN AND HANNOVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

VERY HEAVY RAIN IS ALSO OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4698 10210 4698 10211 4710 10213 4744 10183
      4720 10128 4684 10181 4684 10209
TIME...MOT...LOC 2234Z 221DEG 15KT 4712 10172 4693 10186
WIND...HAIL 60MPH 1.00IN

$$

AYD

389 
WWUS53 KBIS 182253
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
553 PM CDT SAT JUN 18 2011

NDC057-059-065-182303-
/O.EXP.KBIS.SV.W.0039.000000T0000Z-110618T2300Z/
MERCER ND-OLIVER ND-MORTON ND-
553 PM CDT SAT JUN 18 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MORTON...WESTERN
OLIVER AND MERCER COUNTIES WILL EXPIRE AT 600 PM CDT/500 PM MDT/...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH
THESE THUNDERSTORMS.

LAT...LON 4698 10210 4698 10211 4710 10213 4744 10183
      4720 10128 4684 10181 4684 10209
TIME...MOT...LOC 2253Z 220DEG 15KT 4714 10167 4695 10182

$$

AYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 5:20 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	44 min
Jun 18, 5:26 PM CDT	Tornado Warning	BIS	Grant, Morton	21 min
Jun 18, 5:59 PM CDT	Flash Flood Warning	BIS	Mercer, Morton, Oliver	5 hr
Jun 18, 6:02 PM CDT	Tornado Warning	BIS	Grant, Morton	28 min
Jun 18, 6:26 PM CDT	Flash Flood Warning	BIS	Grant, Morton	3 hr
Jun 18, 6:35 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	55 min
Jun 18, 6:40 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	65 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.