Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 135, NWS Bismarck, ND

July 16, 2011Grant County, Morton County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 16, 2011, 5:52 PM MDT for Grant County, Morton County, Sioux County, North Dakota. It was in force for 53 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, 5:52 PM MDT (23:52 UTC)
Expired: Jul 16, 2011, 6:45 PM MDT
In force: 53 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Grant County, ND, Morton County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 51 km from the middle of the area, began a volume at 23:55 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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, 3:57 PM MDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 11.9 hours before the alert went out and 52 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.

142 
WUUS53 KBIS 162352
SVRBIS
NDC037-059-085-170045-
/O.NEW.KBIS.SV.W.0135.110716T2352Z-110717T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
652 PM CDT SAT JUL 16 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL GRANT COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  SOUTH CENTRAL MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  NORTH CENTRAL SIOUX COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 745 PM CDT/645 PM MDT/

* AT 551 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SHIELDS...OR 45 MILES SOUTHWEST OF BISMARCK...AND MOVING NORTHEAST
  AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHIELDS...PORCUPINE...BREIEN AND SOLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

VERY HEAVY RAIN IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL MIDNIGHT CDT SUNDAY
MORNING/1100 PM MDT SATURDAY EVENING/ FOR EASTERN NORTH DAKOTA.

LAT...LON 4653 10102 4646 10070 4622 10071 4609 10123
      4628 10141
TIME...MOT...LOC 2352Z 236DEG 25KT 4623 10121
WIND...HAIL 60MPH 1.00IN

$$

SIMOSKO

3 follow-up statements

273 
WWUS53 KBIS 170012
SVSBIS

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

NDC037-059-085-170045-
/O.CON.KBIS.SV.W.0135.000000T0000Z-110717T0045Z/
GRANT ND-MORTON ND-SIOUX ND-
712 PM CDT SAT JUL 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
SIOUX...SOUTHEASTERN MORTON AND EAST CENTRAL GRANT COUNTIES UNTIL 745
PM CDT/645 PM MDT/...

AT 709 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 5 MILES
NORTHEAST OF PORCUPINE...OR 40 MILES SOUTH OF BISMARCK...MOVING
NORTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  BREIEN AND SOLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

VERY HEAVY RAIN IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4632 10128 4653 10102 4646 10070 4622 10071
      4611 10115
TIME...MOT...LOC 0013Z 236DEG 25KT 4626 10097
WIND...HAIL 60MPH 1.00IN

$$

SIMOSKO

107 
WWUS53 KBIS 170029
SVSBIS

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

NDC037-059-085-170045-
/O.CON.KBIS.SV.W.0135.000000T0000Z-110717T0045Z/
GRANT ND-MORTON ND-SIOUX ND-
729 PM CDT SAT JUL 16 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
SIOUX...SOUTHEASTERN MORTON AND EXTREME EAST CENTRAL GRANT COUNTIES
UNTIL 745 PM CDT/645 PM MDT/...

AT 728 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 8 MILES SOUTH OF SOLEN...OR 37 MILES
SOUTH OF BISMARCK...MOVING NORTHEAST AT 30 MPH. PENNY SIZE HAIL MAY
ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  SOLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

VERY HEAVY RAIN IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4633 10109 4653 10102 4646 10070 4622 10071
      4611 10115
TIME...MOT...LOC 0029Z 236DEG 25KT 4628 10085
WIND...HAIL 60MPH 0.75IN

$$

SIMOSKO

682 
WWUS53 KBIS 170041
SVSBIS

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

NDC037-059-085-170051-
/O.EXP.KBIS.SV.W.0135.000000T0000Z-110717T0045Z/
GRANT ND-MORTON ND-SIOUX ND-
741 PM CDT SAT JUL 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SIOUX...
SOUTHEASTERN MORTON AND EXTREME EAST CENTRAL GRANT COUNTIES WILL
EXPIRE AT 745 PM CDT/645 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 GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL MIDNIGHT SAURDAY NIGHT. 

LAT...LON 4633 10109 4653 10102 4646 10070 4622 10071
      4611 10115
TIME...MOT...LOC 0041Z 236DEG 25KT 4633 10075

$$

SIMOSKO

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 16, 5:28 PM MDT, 24 minutes earlier.

Area forecast discussion, Jul 16, 5:28 PM MDT, 24 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
628 PM CDT SAT JUL 16 2011

.UPDATE...
FEW CHANGES TO GRIDS.

&&

.DISCUSSION...
TORNADIC SUPERCELL CONTINUES MOVING EAST ACROSS SOUTHEAST SHERIDAN
COUNTY AS OTHER CELLS DEVELOP NORTH AND SOUTH OF THIS CELL.

&&

.AVIATION...
MOST AERODROME SITES WILL NOT BE AFFECTED BY CONVECTIVE ACTIVITY
HOWEVER KJMS WILL NEED TO BE UPGRADED FOR MORE WIDESPREAD
THUNDERSTORMS IN THE NEXT 3 TO 4 HOURS.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
EXCESSIVE HEAT WARNING UNTIL 10 PM CDT /9 PM MDT/ TUESDAY FOR
NDZ011>013-019>023-025-034>037-042-045>048-050-051.

&&

SHORT TERM...HW
AVIATION...HW

Hazardous weather outlook, Jul 16, 3:21 AM MDT, 14 hours 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
421 AM CDT SAT JUL 16 2011

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-171100-
DIVIDE-BURKE-RENVILLE-BOTTINEAU-ROLETTE-WILLIAMS-MOUNTRAIL-WARD-
MCHENRY-PIERCE-MCKENZIE-DUNN-MERCER-OLIVER-MCLEAN-SHERIDAN-WELLS-
FOSTER-GOLDEN VALLEY-BILLINGS-STARK-MORTON-BURLEIGH-KIDDER-
STUTSMAN-SLOPE-HETTINGER-GRANT-BOWMAN-ADAMS-SIOUX-EMMONS-LOGAN-
LA MOURE-MCINTOSH-DICKEY-
421 AM CDT SAT JUL 16 2011 /321 AM MDT SAT JUL 16 2011/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL
NORTH DAKOTA...NORTHWEST NORTH DAKOTA...SOUTH CENTRAL NORTH
DAKOTA...SOUTHEAST NORTH DAKOTA AND SOUTHWEST NORTH DAKOTA.

.DAY ONE...TODAY AND TONIGHT

AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH TUESDAY AFTERNOON FOR PORTIONS OF WEST AND CENTRAL NORTH
DAKOTA. HEAT INDEX VALUES OF 100 TO 110 ARE EXPECTED EACH DAY
DURING THIS PERIOD. THE LATEST INFORMATION CAN BE FOUND IN THE
BISNPWBIS PRODUCT.

THUNDERSTORMS WILL CONTINUE OVER PORTIONS OF WEST AND CENTRAL
NORTH DAKOTA SATURDAY MORNING. A FEW STORMS MAY BE SEVERE WITH
DAMAGING WINDS..LARGE HAIL...AND LOCALLY HEAVY RAINFALL.

THERE IS ANOTHER CHANCE FOR THUNDERSTORMS THIS AFTERNOON AND INTO
TONIGHT MAINLY CENTRAL AND EAST THIS AFTERNOON AND EVENING...THEN
INCLUDING THE NORTHWEST OVERNIGHT. SOME STORMS MAY BE SEVERE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

AN EXCESSIVE HEAT WARNING IS IN EFFECT FROM SATURDAY AFTERNOON
THROUGH TUESDAY AFTERNOON FOR PORTIONS OF WEST AND CENTRAL NORTH
DAKOTA. HEAT INDEX VALUES OF 100 TO 110 ARE EXPECTED EACH DAY
DURING THIS PERIOD. THE LATEST INFORMATION CAN BE FOUND IN THE
BISNPWBIS PRODUCT.

CHANCES FOR THUNDERSTORMS ARE FORECAST EACH PERIOD. STRONG TO
SEVERE STORMS WILL REMAIN A THREAT.

.SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE HIGHLY ENCOURAGED TO REPORT ANY SEVERE WEATHER AND
HEAVY RAIN REPORTS.

HEINERT

In the hours before

Special weather statement, Jul 16, 4:03 PM MDT, 1 hour 49 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
503 PM CDT SAT JUL 16 2011

NDZ022-035-162215-
BURLEIGH-SHERIDAN-
503 PM CDT SAT JUL 16 2011

...SPECIAL WEATHER STATEMENT...

AT 459 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
RAPIDLY DEVELOPING THUNDERSTORM OVER NORTHWESTERN BURLEIGH COUNTY...
MOVING NORTHEAST AT 15 MPH.

PEA SIZE HAIL AND WINDS GREATER THAN 40 MPH ARE POSSIBLE WITH THIS
STORM.

* THE THUNDERSTORM WILL BE NEAR...
  NEW JOHNS LAKE BY 510 PM CDT...

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.
THOSE ON NEW JOHNS LAKE SHOULD SEEK SHELTER AS THESE STORMS ARE
EXPECTED TO INTENSIFY.

AYD

Local storm report, Jul 16, 4:44 PM MDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
544 PM CDT SAT JUL 16 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0535 PM     TORNADO          7 NE REGAN              47.23N 100.42W
07/16/2011                   BURLEIGH           ND   PUBLIC

&&

JP MARTIN

Local storm report, Jul 16, 5:22 PM MDT, 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
622 PM CDT SAT JUL 16 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0535 PM     TORNADO          9 N REGAN               47.29N 100.53W
07/16/2011                   BURLEIGH           ND   LAW ENFORCEMENT

            TORNADO REPORTED BY NORTH DAKOTA GAME AND FISH OFFICIAL
            WHO FOLLOWED IT. TORNADO LIFTED AROUND 551 PM CDT IN
            SHERIDAN COUNTY NEAR 5TH ST NE AND 3RD AVE SE. WEATHER
            CHASERS ALSO REPORTED THIS TORNADO AND INDICATION FROM
            THEM IS THAT THERE MAY HAVE BEEN 2. LOCAL WARNING POINT
            OFFICIALS REPORTED NO IMPACTS TO STRUCTURES THAT THEY
            KNOW OF.

&&

JP MARTIN

Special weather statement, Jul 16, 5:47 PM MDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
647 PM CDT SAT JUL 16 2011

NDZ034-042-045-170045-
GRANT-MORTON-SIOUX-
647 PM CDT SAT JUL 16 2011

...SPECIAL WEATHER STATEMENT...

AT 646 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
RAPIDLY DEVELOPING THUNDERSTORM OVER EXTREME EAST CENTRAL GRANT
COUNTY...MOVING NORTHEAST AT 30 MPH.

PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...BRIEF HEAVY DOWNPOURS...
ARE POSSIBLE WITH THIS STORM.

* THE THUNDERSTORM WILL BE NEAR...
  PORCUPINE BY 655 PM CDT...
  BREIEN BY 715 PM CDT...
  SOLEN BY 725 PM CDT...

GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW
AROUND. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS
PASSED.

SIMOSKO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 10:32 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Golden Valley, McKenzie	58 min
Jul 16, 12:21 AM MDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mountrail, Ward	54 min
Jul 16, 12:34 AM MDT	Areal Flood Advisory	BIS	Burke, Mountrail, Williams	6 hr
Jul 16, 3:34 AM MDT	Areal Flood Advisory	BIS	McKenzie	3 hr
Jul 16, 4:03 AM MDT	Severe Thunderstorm Warning	BIS	Dunn, McKenzie	57 min
Jul 16, 4:32 AM MDT	Areal Flood Advisory	BIS	Dunn, McKenzie	3 hr
Jul 16, 4:58 AM MDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Mountrail	62 min
Jul 16, 5:43 AM MDT	Severe Thunderstorm Warning	BIS	Mercer	33 min
Jul 16, 6:14 AM MDT	Severe Thunderstorm Warning	BIS	McLean, Mercer, Oliver	61 min
Jul 16, 7:10 AM MDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Oliver, Sheridan	50 min
Jul 16, 7:54 AM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan, Wells	51 min
Jul 16, 8:02 AM MDT	Severe Thunderstorm Warning	BIS	McLean, Sheridan	43 min
Jul 16, 8:28 AM MDT	Severe Thunderstorm Warning	BIS	Foster, Wells	62 min
Jul 16, 8:36 AM MDT	Severe Thunderstorm Warning	BIS	Sheridan, Wells	39 min
Jul 16, 4:31 PM MDT	Tornado Warning	BIS	Burleigh, Sheridan	29 min
Jul 16, 4:57 PM MDT	Tornado Warning	BIS	Sheridan, Wells	33 min
Jul 16, 5:29 PM MDT	Tornado Warning	BIS	Sheridan, Wells	31 min
Jul 16, 5:59 PM MDT	Severe Thunderstorm Warning	BIS	Wells	61 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2011 Every severe thunderstorm warning 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.