Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 13, NWS Bismarck, ND

June 18, 2011Grant County, Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jun 18, 2011, 5:02 PM MDT for Grant County, Morton County, North Dakota. It was in force for 28 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, 5:02 PM MDT (23:02 UTC)
Expired: Jun 18, 2011, 5:30 PM MDT
In force: 28 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

Counties Grant County, ND, Morton County, ND

The radar

The Bismarck radar (KBIS), 58 km from the middle of the area, began a volume at 23:04 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, 11.0 hours before the alert went out and 62 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.

923 
WFUS53 KBIS 182302
TORBIS
NDC037-059-182330-
/O.NEW.KBIS.TO.W.0013.110618T2302Z-110618T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
602 PM CDT SAT JUN 18 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

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

* UNTIL 630 PM CDT/530 PM MDT/

* AT 500 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 7 MILES NORTH OF CARSON...OR 41 MILES SOUTHWEST
  OF BISMARCK...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ALMONT.

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 4687 10157 4663 10107 4640 10153 4656 10178
TIME...MOT...LOC 2303Z 234DEG 20KT 4653 10153

$$

AYD

2 follow-up statements

447 
WWUS53 KBIS 182308
SVSBIS

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

NDC037-059-182330-
/O.CON.KBIS.TO.W.0013.000000T0000Z-110618T2330Z/
GRANT ND-MORTON ND-
608 PM CDT SAT JUN 18 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MORTON AND NORTH
CENTRAL GRANT COUNTIES UNTIL 630 PM CDT/530 PM MDT/...

AT 504 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS 
STORM WAS LOCATED 8 MILES NORTH OF CARSON...OR 39 MILES SOUTHWEST OF 
BISMARCK...MOVING NORTHEAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  ALMONT.

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.

LARGE HAIL TO PING PONG BALL SIZE AND DAMAGING STRAIGHT LINE WINDS 
ARE ALSO POSSIBLE WITH THIS STORM.

&&

LAT...LON 4687 10157 4663 10107 4640 10153 4656 10178
TIME...MOT...LOC 2308Z 232DEG 20KT 4656 10150

$$

AYD

945 
WWUS53 KBIS 182329
SVSBIS

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

NDC037-059-182339-
/O.EXP.KBIS.TO.W.0013.000000T0000Z-110618T2330Z/
GRANT ND-MORTON ND-
629 PM CDT SAT JUN 18 2011

...THE TORNADO WARNING FOR CENTRAL MORTON AND NORTH CENTRAL GRANT
COUNTIES WILL EXPIRE AT 630 PM CDT/530 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...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE 
WITH THIS THUNDERSTORM.

LAT...LON 4687 10157 4663 10107 4640 10153 4656 10178
TIME...MOT...LOC 2329Z 239DEG 20KT 4658 10145

$$

AYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 18, 4:01 PM MDT	Severe Thunderstorm Warning	BIS	Mercer, Morton, Oliver	59 min
Jun 18, 4:20 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Morton	44 min
Jun 18, 4:26 PM MDT	Tornado Warning	BIS	Grant, Morton	21 min
Jun 18, 4:59 PM MDT	Flash Flood Warning	BIS	Mercer, Morton, Oliver	5 hr
Jun 18, 5:26 PM MDT	Flash Flood Warning	BIS	Grant, Morton	3 hr
Jun 18, 5:35 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	55 min
Jun 18, 5:40 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Morton	65 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.