Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 17, NWS Bismarck, ND

June 20, 2011Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jun 20, 2011, 2:46 PM CDT for Morton County, North Dakota. It was in force for 29 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, 2:46 PM CDT (19:46 UTC)
Expired: Jun 20, 2011, 3:15 PM CDT
In force: 29 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Morton County, ND

The radar

The Bismarck radar (KBIS), 56 km from the middle of the area, began a volume at 19:46 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, 7.8 hours before the alert went out and 61 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.

952 
WFUS53 KBIS 201946
TORBIS
NDC059-202015-
/O.NEW.KBIS.TO.W.0017.110620T1946Z-110620T2015Z/

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

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 315 PM CDT

* AT 242 PM CDT...THE PUBLIC REPORTED A TORNADO NORTHEAST OF         
  ALMONT...OR 31 MILES WEST OF BISMARCK. DOPPLER RADAR SHOWED THIS   
  TORNADO MOVING WEST AT 5 MPH.

* THE TORNADO WILL BE NEAR...
  ALMONT AROUND 315 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. 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 4663 10163 4686 10157 4686 10133 4663 10131
TIME...MOT...LOC 1946Z 077DEG 4KT 4675 10143

$$

VINING

2 follow-up statements

859 
WWUS53 KBIS 202003
SVSBIS

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

NDC059-202015-
/O.CON.KBIS.TO.W.0017.000000T0000Z-110620T2015Z/
MORTON ND-
303 PM CDT MON JUN 20 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MORTON COUNTY
UNTIL 315 PM CDT...

AT 300 PM CDT...THE PUBLIC REPORTED A FUNNEL CLOUD.  THIS FUNNEL 
CLOUD WAS LOCATED 2 MILES NORTHEAST OF ALMONT...OR 33 MILES WEST 
OF BISMARCK...MOVING NORTHWEST AT 5 MPH.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A FUNNEL CLOUD HAS BEEN REPORTED. THIS FUNNEL CLOUD MAY 
REACH THE GROUND. 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.

&&

LAT...LON 4663 10163 4686 10157 4686 10133 4663 10131
TIME...MOT...LOC 2001Z 119DEG 3KT 4674 10148

$$

VINING

759 
WWUS53 KBIS 202017
SVSBIS

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

NDC059-202027-
/O.EXP.KBIS.TO.W.0017.000000T0000Z-110620T2015Z/
MORTON ND-
317 PM CDT MON JUN 20 2011

...THE TORNADO WARNING FOR CENTRAL MORTON COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED ACROSS THE WARNED 
AREA.  HOWEVER HEAVY RAIN AND OTHER FUNNEL CLOUD SIGHTINGS ARE STILL 
POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4663 10163 4686 10157 4686 10133 4663 10131
TIME...MOT...LOC 2003Z 119DEG 3KT 4674 10148

$$

VINING

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, 3:15 PM CDT	Tornado Warning	BIS	Mercer	30 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.