Alert archive / North Dakota / Tornado Warnings in 2013

Tornado Warning 13, NWS Bismarck, ND

July 21, 2013Grant County, Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 21, 2013, 5:28 PM MDT for Grant County, Morton County, North Dakota. It was in force for 32 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 21, 2013, 5:28 PM MDT (23:28 UTC)
Expired: Jul 21, 2013, 6:00 PM MDT
In force: 32 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.75 in

Counties Grant County, ND, Morton County, ND

The radar

The Bismarck radar (KBIS), 43 km from the middle of the area, began a volume at 23:29 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 21, 1:43 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.5 hours before the alert went out and 48 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: 18 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

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

383 
WFUS53 KBIS 212328
TORBIS
NDC037-059-220000-
/O.NEW.KBIS.TO.W.0013.130721T2328Z-130722T0000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
628 PM CDT SUN JUL 21 2013

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 700 PM CDT/600 PM MDT/

* AT 525 PM MDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 7 MILES SOUTH OF ALMONT...OR 34 MILES WEST OF
  BISMARCK....AND MOVING SOUTHEAST AT 40 MPH.

  HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* 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 4666 10102 4638 10118 4655 10159 4673 10154
TIME...MOT...LOC 2328Z 279DEG 34KT 4662 10142

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ABELING

2 follow-up statements

809 
WWUS53 KBIS 212347
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
647 PM CDT SUN JUL 21 2013

NDC037-212357-
/O.CAN.KBIS.TO.W.0013.000000T0000Z-130722T0000Z/
GRANT ND-
547 PM MDT SUN JUL 21 2013

...THE TORNADO WARNING FOR NORTH CENTRAL GRANT COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4638 10118 4643 10130 4655 10131 4669 10124
      4666 10102
TIME...MOT...LOC 2347Z 279DEG 34KT 4656 10113

$$

NDC059-220000-
/O.CON.KBIS.TO.W.0013.000000T0000Z-130722T0000Z/
MORTON ND-
647 PM CDT SUN JUL 21 2013

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

AT 643 PM CDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED 8 MILES NORTH OF FLASHER...OR 25 MILES SOUTHWEST OF
BISMARCK...MOVING EAST AT 40 MPH.

HAZARD...TORNADO AND GOLF BALL SIZE HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF SOUTH 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 4638 10118 4643 10130 4655 10131 4669 10124
      4666 10102
TIME...MOT...LOC 2347Z 279DEG 34KT 4656 10113

TORNADO...RADAR INDICATED
HAIL...1.75IN

$$

ABELING

516 
WWUS53 KBIS 212357
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
657 PM CDT SUN JUL 21 2013

NDC059-220006-
/O.EXP.KBIS.TO.W.0013.000000T0000Z-130722T0000Z/
MORTON ND-
657 PM CDT SUN JUL 21 2013

...THE TORNADO WARNING FOR SOUTH CENTRAL MORTON COUNTY WILL EXPIRE AT
700 PM CDT...

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT.

LAT...LON 4638 10118 4643 10130 4655 10131 4669 10124
      4666 10102
TIME...MOT...LOC 2356Z 279DEG 34KT 4655 10101

$$

ABELING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 21, 1:51 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	54 min
Jul 21, 2:07 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, Mountrail, Williams	68 min
Jul 21, 2:19 PM MDT	Severe Thunderstorm Warning	BIS	Mountrail, Williams	26 min
Jul 21, 2:24 PM MDT	Severe Thunderstorm Warning	BIS	Burke, Ward	66 min
Jul 21, 2:39 PM MDT	Severe Thunderstorm Warning	BIS	Mountrail	66 min
Jul 21, 2:44 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie	61 min
Jul 21, 3:06 PM MDT	Severe Thunderstorm Warning	BIS	McKenzie, McLean, Mountrail	54 min
Jul 21, 3:41 PM MDT	Flash Flood Warning	BIS	Mountrail	6 hr
Jul 21, 3:45 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver	60 min
Jul 21, 3:58 PM MDT	Severe Thunderstorm Warning	BIS	McLean, Mountrail, Ward	62 min
Jul 21, 4:07 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Stark	38 min
Jul 21, 4:39 PM MDT	Tornado Warning	BIS	McHenry	51 min
Jul 21, 4:43 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Morton	62 min
Jul 21, 4:54 PM MDT	Tornado Warning	BIS	Grant, Morton	36 min
Jul 21, 5:03 PM MDT	Tornado Warning Tornado observed	BIS	McHenry	42 min
Jul 21, 5:38 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Grant, Morton, Oliver, Sioux	52 min
Jul 21, 5:39 PM MDT	Severe Thunderstorm Warning	BIS	McHenry, Pierce	66 min

Nearby

Tornado Warnings in North Dakota, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.