Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 12, NWS Bismarck, ND

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

NWS Bismarck, ND issued this tornado warning at Jun 18, 2011, 4:26 PM MDT for Grant County, Morton County, North Dakota. It was in force for 21 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, 4:26 PM MDT (22:26 UTC)
Expired: Jun 18, 2011, 4:47 PM MDT
In force: 21 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

Counties Grant County, ND, Morton County, ND

The radar

The Bismarck radar (KBIS), 67 km from the middle of the area, began a volume at 22:28 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, 10.4 hours before the alert went out and 71 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.

524 
WFUS53 KBIS 182226
TORBIS
NDC037-059-182300-
/O.NEW.KBIS.TO.W.0012.110618T2226Z-110618T2300Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
426 PM MDT 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 500 PM MDT/600 PM CDT/

* AT 423 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED NEAR CARSON...OR 43 MILES NORTHEAST OF LEMMON...
  AND MOVING NORTHEAST AT 20 MPH.

* THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF CENTRAL
  MORTON AND NORTH CENTRAL GRANT COUNTIES.

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 4677 10165 4660 10123 4636 10164 4646 10182
TIME...MOT...LOC 2226Z 221DEG 18KT 4645 10163

$$

AYD

1 follow-up statement

063 
WWUS53 KBIS 182247
SVSBIS

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

NDC037-059-182257-
/O.CAN.KBIS.TO.W.0012.000000T0000Z-110618T2300Z/
GRANT ND-MORTON ND-
447 PM MDT SAT JUN 18 2011

...THE TORNADO WARNING FOR CENTRAL MORTON AND NORTH CENTRAL GRANT
COUNTIES IS CANCELLED...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
BEEN CANCELLED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN 
EFFECT FOR THE AREA THROUGH 615 PM CDT.

LAT...LON 4677 10165 4660 10123 4636 10164 4646 10182
TIME...MOT...LOC 2247Z 222DEG 16KT 4651 10153

$$

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, 4:59 PM MDT	Flash Flood Warning	BIS	Mercer, Morton, Oliver	5 hr
Jun 18, 5:02 PM MDT	Tornado Warning	BIS	Grant, Morton	28 min
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.