Alert archive / North Dakota / Tornado Warnings in 2011

Tornado Warning 45, NWS Bismarck, ND

July 16, 2011Sheridan County, Wells County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 16, 2011, 5:57 PM CDT for Sheridan County, Wells County, North Dakota. It was in force for 33 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 16, 2011, 5:57 PM CDT (22:57 UTC)
Expired: Jul 16, 2011, 6:30 PM CDT
In force: 33 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon

Counties Sheridan County, ND, Wells County, ND

The radar

The Bismarck radar (KBIS), 80 km from the middle of the area, began a volume at 23:00 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 16, 4:57 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.0 hours before the alert went out and 78 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: 894 J/kg
Mixed-layer CIN: -182 J/kg
Mixed-layer LCL: 764 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 171 m²/s²
0-3 km storm-relative helicity: 261 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 13.2

Open this sounding in Storm Lab

The text

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

911 
WFUS53 KBIS 162257
TORBIS
NDC083-103-162330-
/O.NEW.KBIS.TO.W.0045.110716T2257Z-110716T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
557 PM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN SHERIDAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  SOUTHWESTERN WELLS COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 630 PM CDT.

* AT 555 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS
  STORM WAS LOCATED 10 MILES SOUTH OF MCCLUSKY...OR 42 MILES
  NORTHEAST OF BISMARCK...AND MOVING NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DENHOFF...GOODRICH AND HURDSFIELD.

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 IS ALSO POSSIBLE WITH THIS STORM. 

&&

LAT...LON 4733 10033 4733 10047 4739 10055 4769 10004
      4734 9977
TIME...MOT...LOC 2257Z 243DEG 22KT 4735 10036

$$

AYD

2 follow-up statements

950 
WWUS53 KBIS 162311
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
611 PM CDT SAT JUL 16 2011

NDC083-103-162330-
/O.CON.KBIS.TO.W.0045.000000T0000Z-110716T2330Z/
SHERIDAN ND-WELLS ND-
611 PM CDT SAT JUL 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WELLS AND
SOUTHEASTERN SHERIDAN COUNTIES UNTIL 630 PM CDT...

AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 8 MILES SOUTH OF DENHOFF...OR 45 MILES NORTHEAST OF
BISMARCK...MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  DENHOFF...GOODRICH AND HURDSFIELD.

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 IS ALSO POSSIBLE WITH THIS STORM.

&&

LAT...LON 4733 10033 4733 10039 4745 10045 4769 10004
      4734 9977
TIME...MOT...LOC 2311Z 251DEG 19KT 4736 10026

$$

AYD

435 
WWUS53 KBIS 162322
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
622 PM CDT SAT JUL 16 2011

NDC083-103-162330-
/O.CON.KBIS.TO.W.0045.000000T0000Z-110716T2330Z/
SHERIDAN ND-WELLS ND-
622 PM CDT SAT JUL 16 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHWESTERN WELLS AND
SOUTHEASTERN SHERIDAN COUNTIES UNTIL 630 PM CDT...

AT 618 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED 7 MILES SOUTH OF GOODRICH...OR 49 MILES NORTHEAST
OF BISMARCK...MOVING EAST AT 25 MPH.

LOCATIONS IMPACTED INCLUDE...
  GOODRICH AND HURDSFIELD.

HAIL UP TO GOLF BALL SIZE IS POSSIBLE WITH THIS SEVERE STORM. 
ALSO...IT HAS A HISTORY OF PRODUCING TORNADOES SO STAY INSIDE...IN A 
BASEMENT...UNTIL THE STORM PASSES.

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 4746 10034 4769 10004 4734 9977 4733 10029
TIME...MOT...LOC 2321Z 259DEG 24KT 4739 10013

$$

AYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 11:32 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	58 min
Jul 16, 1:21 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mountrail, Ward	54 min
Jul 16, 1:34 AM CDT	Areal Flood Advisory	BIS	Burke, Mountrail, Williams	6 hr
Jul 16, 4:34 AM CDT	Areal Flood Advisory	BIS	McKenzie	3 hr
Jul 16, 5:03 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	57 min
Jul 16, 5:32 AM CDT	Areal Flood Advisory	BIS	Dunn, McKenzie	3 hr
Jul 16, 5:58 AM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Mountrail	62 min
Jul 16, 6:43 AM CDT	Severe Thunderstorm Warning	BIS	Mercer	33 min
Jul 16, 7:14 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	61 min
Jul 16, 8:10 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Oliver, Sheridan	50 min
Jul 16, 8:54 AM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan, Wells	51 min
Jul 16, 9:02 AM CDT	Severe Thunderstorm Warning	BIS	McLean, Sheridan	43 min
Jul 16, 9:28 AM CDT	Severe Thunderstorm Warning	BIS	Foster, Wells	62 min
Jul 16, 9:36 AM CDT	Severe Thunderstorm Warning	BIS	Sheridan, Wells	39 min
Jul 16, 5:31 PM CDT	Tornado Warning	BIS	Burleigh, Sheridan	29 min
Jul 16, 6:29 PM CDT	Tornado Warning	BIS	Sheridan, Wells	31 min
Jul 16, 6:52 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Sioux	53 min
Jul 16, 6:59 PM CDT	Severe Thunderstorm Warning	BIS	Wells	61 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.