Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 73, NWS Bismarck, ND

July 22, 2011Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 22, 2011, 6:36 PM CDT for Morton County, North Dakota. It was in force for 24 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: Jul 22, 2011, 6:36 PM CDT (23:36 UTC)
Expired: Jul 22, 2011, 7:00 PM CDT
In force: 24 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

County Morton County, ND

The radar

The Bismarck radar (KBIS), 65 km from the middle of the area, began a volume at 23:40 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 22, 5:35 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.6 hours before the alert went out and 69 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: 1474 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 114 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.8

Open this sounding in Storm Lab

The text

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

734 
WFUS53 KBIS 222336
TORBIS
NDC059-230000-
/O.NEW.KBIS.TO.W.0073.110722T2336Z-110723T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
636 PM CDT FRI JUL 22 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

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

* UNTIL 700 PM CDT

* AT 635 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD
  NEAR ALMONT...OR 38 MILES WEST OF BISMARCK. A TORNADO MAY DEVELOP
  AT ANY TIME. DOPPLER RADAR SHOWED THIS DANGEROUS STORM MOVING
  NORTHWEST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL MORTON 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 4668 10167 4673 10166 4678 10159 4671 10145
      4663 10157
TIME...MOT...LOC 2336Z 118DEG 2KT 4668 10157

$$

SIMOSKO

2 follow-up statements

903 
WWUS53 KBIS 222348
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
648 PM CDT FRI JUL 22 2011

NDC059-230000-
/O.CON.KBIS.TO.W.0073.000000T0000Z-110723T0000Z/
MORTON ND-
648 PM CDT FRI JUL 22 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MORTON COUNTY
UNTIL 700 PM CDT...

AT 646 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A FUNNEL CLOUD.  A
TORNADO MAY DEVELOP AT ANY TIME. THIS DANGEROUS STORM WAS LOCATED
NEAR ALMONT...OR 39 MILES WEST OF BISMARCK...MOVING NORTHWEST AT 5
MPH.

IN ADDITION...AT QUARTER SIZE HAIL WAS REPORTED 1 MILE SOUTHEAST OF 
ALMONT WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  MAINLY RURAL AREAS OF CENTRAL MORTON 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 4668 10167 4673 10166 4678 10159 4671 10145
      4663 10157
TIME...MOT...LOC 2347Z 118DEG 3KT 4669 10159

$$

SIMOSKO

807 
WWUS53 KBIS 222357
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
657 PM CDT FRI JUL 22 2011

NDC059-230006-
/O.EXP.KBIS.TO.W.0073.000000T0000Z-110723T0000Z/
MORTON ND-
657 PM CDT FRI JUL 22 2011

...THE TORNADO WARNING FOR CENTRAL MORTON COUNTY WILL EXPIRE AT 700
PM CDT/600 PM MDT/...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
HOWEVER SMALL HAIL AND DAMAGING WINDS ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 2 AM CDT. 

A SEVERE THUNDERSTORM WARNING HAS REPLACED THE TORNADO WARNING.

LAT...LON 4668 10167 4673 10166 4678 10159 4671 10145
      4663 10157
TIME...MOT...LOC 2356Z 118DEG 3KT 4669 10160

$$

SIMOSKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 3:56 AM CDT	Flash Flood Watch	BIS	Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 26 more	23 hr
Jul 22, 5:26 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton	64 min
Jul 22, 6:11 PM CDT	Flash Flood Warning	BIS	Morton	116 min
Jul 22, 6:44 PM CDT	Severe Thunderstorm Warning	BIS	Golden Valley, McKenzie, Williams	61 min
Jul 22, 6:59 PM CDT	Severe Thunderstorm Warning	BIS	Morton	10 min

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.