Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 29, NWS Bismarck, ND

July 8, 2011Emmons County, Morton County, Sioux County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 8, 2011, 6:45 PM CDT for Emmons County, Morton County, Sioux County, North Dakota. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jul 8, 2011, 6:45 PM CDT (23:45 UTC)
Expired
Jul 8, 2011, 7:30 PM CDT
In force
45 min
Issued by
NWS Bismarck, ND
Area
Storm-based polygon

Counties Emmons County, ND, Morton County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 33 km from the middle of the area, began a volume at 23:47 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.

What was reported inside it

TimeReportWhereRemark
Jul 8, 7:30 PM CDTTSTM WND GST 604 Nw Hazelton, ND

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 8, 2:32 PM CDTTornado WatchSPC9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.8 hours before the alert went out and 31 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-pSkew-T log-p diagram, Bismarck Municip, ND at 12:00Z on 2011-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 57 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 12:00Z on 2011-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
57 J/kg
Mixed-layer CIN
-207 J/kg
Mixed-layer LCL
1101 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
209 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

693 
WFUS53 KBIS 082345
TORBIS
NDC029-059-085-090030-
/O.NEW.KBIS.TO.W.0029.110708T2345Z-110709T0030Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
645 PM CDT FRI JUL 8 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN EMMONS COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  SOUTHEASTERN MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  NORTHEASTERN SIOUX COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 730 PM CDT

* AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
  A CONFIRMED TORNADO NEAR CANNON BALL...OR 27 MILES SOUTH OF
  BISMARCK. DOPPLER RADAR SHOWED THIS TORNADO MOVING EAST AT 15 MPH.

* IN ADDITION TO THE TORNADO...LARGE HAIL...DAMAGING STRAIGHT LINE   
  WINDS...AND VERY HEAVY RAIN CAN ALSO BE EXPECTED WITH THIS STORM.  
  
* LOCATIONS IMPACTED INCLUDE...
  CANNON BALL...FORT RICE AND HAZELTON.

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.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT
701-223-4582.

&&

LAT...LON 4663 10057 4664 10032 4638 10016 4633 10072
      4653 10078
TIME...MOT...LOC 2344Z 255DEG 14KT 4644 10062

$$

HEINERT
1 follow-up statement
932 
WWUS53 KBIS 090006
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
706 PM CDT FRI JUL 8 2011

NDC059-085-090016-
/O.CAN.KBIS.TO.W.0029.000000T0000Z-110709T0030Z/
MORTON ND-SIOUX ND-
706 PM CDT FRI JUL 8 2011

...THE TORNADO WARNING FOR NORTHEASTERN SIOUX AND SOUTHEASTERN MORTON
COUNTIES IS CANCELLED...

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

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT
701-223-4582.

LAT...LON 4639 10056 4643 10059 4648 10059 4653 10054
      4658 10059 4659 10056 4661 10061 4663 10057
      4664 10032 4638 10016 4635 10055
TIME...MOT...LOC 0006Z 255DEG 14KT 4646 10050

$$

NDC029-090030-
/O.CON.KBIS.TO.W.0029.000000T0000Z-110709T0030Z/
EMMONS ND-
706 PM CDT FRI JUL 8 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN EMMONS COUNTY
UNTIL 730 PM CDT...

AT 705 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 6 MILES SOUTHEAST OF FORT RICE...OR 27 MILES
SOUTHEAST OF BISMARCK...MOVING EAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  HAZELTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOTORISTS SHOULD NOT TAKE SHELTER UNDER HIGHWAY OVERPASSES. AS A LAST
RESORT... EITHER PARK YOUR VEHICLE AND STAY PUT...OR ABANDON YOUR
VEHICLE AND LIE DOWN IN A LOW LYING AREA.

REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT
701-223-4582.

&&

LAT...LON 4639 10056 4643 10059 4648 10059 4653 10054
      4658 10059 4659 10056 4661 10061 4663 10057
      4664 10032 4638 10016 4635 10055
TIME...MOT...LOC 0006Z 255DEG 14KT 4646 10050

$$

HEINERT

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 2:29 PM CDTTornado WarningBISGolden Valley31 min
Jul 8, 2:51 PM CDTSevere Thunderstorm WarningBISGolden Valley, McKenzie39 min
Jul 8, 3:19 PM CDTAreal Flood AdvisoryBISBurke, Mountrail, Renville, Ward3 hr
Jul 8, 3:29 PM CDTSevere Thunderstorm WarningBISBurke, Mountrail, Renville, Ward40 min
Jul 8, 3:35 PM CDTSevere Thunderstorm WarningBISGrant55 min
Jul 8, 3:39 PM CDTSevere Thunderstorm WarningBISBillings, Golden Valley66 min
Jul 8, 4:00 PM CDTAreal Flood AdvisoryBISBillings, Dunn, Stark5 hr
Jul 8, 4:12 PM CDTSevere Thunderstorm WarningBISDunn63 min
Jul 8, 4:21 PM CDTSevere Thunderstorm WarningBISBillings, Stark24 min
Jul 8, 4:26 PM CDTSevere Thunderstorm WarningBISGrant, Morton64 min
Jul 8, 4:30 PM CDTSevere Thunderstorm WarningBISGrant, Morton60 min
Jul 8, 4:39 PM CDTAreal Flood AdvisoryBISBurke, Divide, Williams3 hr
Jul 8, 5:15 PM CDTTornado WarningBISFoster, Kidder, Stutsman, Wells30 min
Jul 8, 5:18 PM CDTTornado WarningBISGrant, Morton42 min
Jul 8, 5:19 PM CDTSevere Thunderstorm WarningBISDunn, McLean, Mercer14 min
Jul 8, 5:22 PM CDTTornado WarningBISDunn, Mercer23 min
Jul 8, 5:41 PM CDTTornado WarningBISDunn, Mercer49 min
Jul 8, 5:44 PM CDTTornado WarningBISStutsman31 min
Jul 8, 5:53 PM CDTSevere Thunderstorm WarningBISBurleigh, Emmons, Morton, Sioux52 min
Jul 8, 6:15 PM CDTSevere Thunderstorm WarningBISStutsman31 min
Jul 8, 6:21 PM CDTTornado WarningBISEmmons, Morton, Sioux24 min
Jul 8, 6:21 PM CDTTornado WarningBISMcLean, Mercer, Oliver39 min
Jul 8, 6:42 PM CDTTornado WarningBISStutsman33 min
Jul 8, 6:52 PM CDTAreal Flood AdvisoryBISStutsman6 hr
Jul 8, 6:59 PM CDTSevere Thunderstorm WarningBISMcHenry, McLean, Oliver, Sheridan61 min

Nearby

Tornado Warnings in North Dakota, 2011Every tornado warning in 2011Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.