Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 18, NWS Bismarck, ND

June 20, 2011Mercer County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jun 20, 2011, 3:15 PM CDT for Mercer County, North Dakota. It was in force for 30 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 20, 2011, 3:15 PM CDT (20:15 UTC)
Expired: Jun 20, 2011, 3:45 PM CDT
In force: 30 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Mercer County, ND

The radar

The Bismarck radar (KBIS), 105 km from the middle of the area, began a volume at 20:18 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, 8.3 hours before the alert went out and 109 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: 17 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 76 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.

353 
WFUS53 KBIS 202015
TORBIS
NDC057-202045-
/O.NEW.KBIS.TO.W.0018.110620T2015Z-110620T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
315 PM CDT MON JUN 20 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  WESTERN MERCER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 345 PM CDT

* AT 309 PM CDT...THE PUBLIC REPORTED A FUNNEL CLOUD NEAR GOLDEN 
VALLEY IN MERCER COUNTY...OR 45 MILES NORTHEAST OF DICKINSON. A 
TORNADO MAY DEVELOP AT ANY TIME. DOPPLER RADAR SHOWED THIS DANGEROUS 
STORM MOVING SOUTH AT 15 MPH.

* THIS DANGEROUS STORM WILL BE AROUND AND SOUTH OF GOLDEN 
VALLEY...IN MERCER COUNTY.
  
PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4712 10183 4708 10213 4736 10215 4741 10197
TIME...MOT...LOC 2013Z 347DEG 11KT 4730 10206

$$

VINING

2 follow-up statements

959 
WWUS53 KBIS 202028
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
328 PM CDT MON JUN 20 2011

NDC057-202045-
/O.CON.KBIS.TO.W.0018.000000T0000Z-110620T2045Z/
MERCER ND-
328 PM CDT MON JUN 20 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR WESTERN MERCER COUNTY
UNTIL 345 PM CDT...

AT 309 PM CDT...THE PUBLIC REPORTED A FUNNEL CLOUD NEAR THE TOWN OF 
GOLDEN VALLEY IN MERCER COUNTY.  THE STORM RESPONSIBLE FOR THIS 
FUNNEL CLOUD IS CURRENTLY OVER THE TOWN OF GOLDEN VALLEY. A TORNADO 
COULD FORM AT ANY MOMENT...MOVEMENT OF THIS STORM WAS SOUTH AT 10 
MPH.

LOCATIONS IMPACTED INCLUDE...
  GOLDEN VALLEY...AND RURAL PORTIONS OF SOUTHWEST MERCER COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF A TORNADO IS REPORTED. TAKE COVER. MOVE TO AN INTERIOR ROOM ON 
THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE 
HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL 
SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4712 10183 4708 10213 4736 10215 4741 10197
TIME...MOT...LOC 2026Z 339DEG 7KT 4727 10205

$$

HAMILTON

160 
WWUS53 KBIS 202047
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
347 PM CDT MON JUN 20 2011

NDC057-202057-
/O.EXP.KBIS.TO.W.0018.000000T0000Z-110620T2045Z/
MERCER ND-
347 PM CDT MON JUN 20 2011

...THE TORNADO WARNING FOR WESTERN MERCER COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT
701-223-4582.

LAT...LON 4712 10183 4708 10213 4736 10215 4741 10197
TIME...MOT...LOC 2028Z 339DEG 7KT 4727 10205

$$

HAMILTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:36 PM CDT	Tornado Warning	BIS	Golden Valley	24 min
Jun 19, 8:26 PM CDT	Flash Flood Warning	BIS	Golden Valley	3 hr
Jun 19, 11:15 PM CDT	Areal Flood Warning	BIS	Mountrail	17 hr
Jun 20, 1:04 AM CDT	Areal Flood Advisory	BIS	Stutsman	5 hr
Jun 20, 5:58 AM CDT	Areal Flood Advisory	BIS	Foster, Stutsman	25 min
Jun 20, 6:19 AM CDT	Flash Flood Warning	BIS	Foster, Stutsman	6 hr
Jun 20, 2:12 PM CDT	Tornado Warning	BIS	Oliver	33 min
Jun 20, 2:31 PM CDT	Tornado Warning	BIS	McLean	29 min
Jun 20, 2:46 PM CDT	Tornado Warning	BIS	Morton	29 min
Jun 20, 6:53 PM CDT	Areal Flood Advisory	BIS	Oliver	12 hr

Nearby

Tornado Warnings in North Dakota, 2011 Every tornado warning in 2011 Tornadoes 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.