Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 297, NWS Bismarck, ND

August 15, 2011Grant County, Morton County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 15, 2011, 11:11 PM MDT for Grant County, Morton County, Sioux County, North Dakota. It was in force for 64 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: Aug 15, 2011, 11:11 PM MDT (05:11 UTC)
Expired: Aug 16, 2011, 12:15 AM MDT
In force: 64 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Bismarck radar (KBIS), 85 km from the middle of the area, began a volume at 05:13 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
Aug 15, 4:23 PM MDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 5.2 hours before the alert went out and 89 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: 2516 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1581 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.5

Open this sounding in Storm Lab

The text

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

008 
WUUS53 KBIS 160511
SVRBIS
NDC037-059-085-160615-
/O.NEW.KBIS.SV.W.0297.110816T0511Z-110816T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
1111 PM MDT MON AUG 15 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

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

* UNTIL 1215 AM MDT/115 AM CDT/

* AT 1108 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 9 MILES NORTHWEST OF HEART BUTTE DAM TO 8 MILES SOUTH OF LEITH
  TO MORRISTOWN...AND MOVING EAST AT 45 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HEART BUTTE DAM...LEITH...CARSON...ST. GERTRUDE...LARK...RALEIGH...
  ALMONT...SHIELDS...PORCUPINE...FLASHER...SELFRIDGE...BREIEN...SOLEN
  AND ST. ANTHONY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE A HISTORY OF PRODUCING WINDS ON EXCESS OF 60 MPH. 
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM 
WINDOWS.

&&

LAT...LON 4604 10200 4628 10200 4629 10204 4663 10205
      4664 10209 4672 10209 4676 10191 4681 10104
      4623 10064 4594 10069 4594 10187
TIME...MOT...LOC 0510Z 271DEG 40KT 4668 10192 4625 10161
          4594 10161
WIND...HAIL 60MPH <.75IN

$$

HEINERT

2 follow-up statements

115 
WWUS53 KBIS 160532
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1232 AM CDT TUE AUG 16 2011

NDC037-059-085-160615-
/O.CON.KBIS.SV.W.0297.000000T0000Z-110816T0615Z/
GRANT ND-MORTON ND-SIOUX ND-
1132 PM MDT MON AUG 15 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SIOUX...
SOUTHERN MORTON AND GRANT COUNTIES UNTIL 1215 AM MDT/115 AM CDT/...

AT 1231 AM CDT/1131 PM MDT/...NATIONAL WEATHER SERVICE DOPPLER RADAR
INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG
A LINE EXTENDING FROM ALMONT TO ST. GERTRUDE TO MCINTOSH...MOVING
EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  RALEIGH...ALMONT...SHIELDS...PORCUPINE...FLASHER...SELFRIDGE...
  BREIEN AND SOLEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER 
HOUR...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION 
MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR 
BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS 
WHERE WATER COVERS THE ROAD.

&&

LAT...LON 4604 10200 4628 10200 4629 10204 4663 10205
      4664 10209 4672 10209 4676 10191 4681 10104
      4623 10064 4594 10069 4594 10187
TIME...MOT...LOC 0532Z 271DEG 40KT 4668 10156 4625 10126
          4594 10126
WIND...HAIL 60MPH <.75IN

$$

HEINERT

658 
WWUS53 KBIS 160610
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
110 AM CDT TUE AUG 16 2011

NDC037-059-085-160621-
/O.EXP.KBIS.SV.W.0297.000000T0000Z-110816T0615Z/
GRANT ND-MORTON ND-SIOUX ND-
1210 AM MDT TUE AUG 16 2011

...THE SEVERE THUNDERSTORM WARNING FOR SIOUX...SOUTHERN MORTON AND
GRANT COUNTIES WILL EXPIRE AT 115 AM CDT/1215 AM MDT/...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW
SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR
PROPERTY.  HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THESE
THUNDERSTORMS.

LAT...LON 4604 10200 4628 10200 4629 10204 4663 10205
      4664 10209 4672 10209 4676 10191 4681 10104
      4623 10064 4594 10069 4594 10187
TIME...MOT...LOC 0611Z 271DEG 40KT 4667 10093 4624 10063
          4593 10064

$$

ABELING

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 Aug 15, 10:29 PM MDT, 42 minutes earlier.

Area forecast discussion, Aug 15, 10:29 PM MDT, 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
1129 PM CDT MON AUG 15 2011

.UPDATE...THUNDERSTORMS WITH HEAVY RAIN.

&&

.DISCUSSION...
SEVERE THUNDERSTORM WATCH CONTINUES UNTIL 1 AM CDT FOR MOST OF
WEST AND CENTRAL NORTH DAKOTA. CURRENTLY A SECONDARY LINE OF
STORMS IS MOVING THROUGH SOUTHWEST NORTH DAKOTA AND THIS IS
FORECAST TO REACH BISMARCK AND MANDAN BETWEEN 1 AM AND 3 AM CDT.
ADDED MORE HEAVY RAIN TO SOUTH CENTRAL NORTH DAKOTA FOR THESE
STORMS.

&&

.AVIATION...AT 04Z/11 PM CDT...A COLD FRONT WAS MOVING THROUGH
WESTERN NORTH DAKOTA AND A LINE OF THUNDERSTORMS WAS ACCOMPANYING THE
FRONT. EXPECT THIS LINE TO MOVE EAST THROUGH DICKINSON TO BISMARCK
TO JAMESTOWN BETWEEN 04Z-09Z. ALSO SHOWERS AND THUNDERSTORMS
ASSOCIATED WITH A SURFACE LOW WILL MOVE THROUGH KINS AND MINOT.
AFTER 12Z...HIGH PRESSURE WILL BUILD IN AND VFR CONDITIONS ARE
EXPECTED. GUSTY NORTHWEST WINDS OF 25 TO 35 KTS WILL BUILD IN WITH
THE HIGH.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...WAA
AVIATION...WAA

Hazardous weather outlook, Aug 15, 9:14 AM MDT, 13 hours 57 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
1014 AM CDT MON AUG 15 2011

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-161515-
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-
1014 AM CDT MON AUG 15 2011 /914 AM MDT MON AUG 15 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

CHANCES FOR SEVERE THUNDERSTORMS WILL DEVELOP THIS
AFTERNOON...MAINLY OVER WESTERN PORTIONS OF THE STATE.

CHANCES FOR THUNDERSTORMS WILL INCREASE TONIGHT OVER ALL OF WEST
AND CENTRAL NORTH DAKOTA. STRONG TO SEVERE STORMS ARE LIKELY OVER
SOME AREAS. THE MAIN SEVERE WEATHER THREATS WILL BE LARGE HAIL AND
STRONG WINDS. ISOLATED TORNADOES WILL BE POSSIBLE AS WELL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

CHANCES FOR THUNDERSTORMS WILL CONTINUE OVER NORTHWEST AND CENTRAL
NORTH DAKOTA TUESDAY MORNING...THEN MAINLY OVER EASTERN NORTH
DAKOTA TUESDAY AFTERNOON. A FEW STORMS MAY BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY OCCUR THIS AFTERNOON THROUGH TUESDAY
MORNING.

TM

In the hours before

Local storm report, Aug 15, 9:56 PM MDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BISMARCK ND
1056 PM CDT MON AUG 15 2011

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

0505 PM     HAIL             5 SE MANNING            47.18N 102.70W
08/15/2011  E1.75 INCH       DUNN               ND   PUBLIC

            ALSO HAD 50 MPH WIND GUSTS. WINDOWS BROKEN AND A VEHICLE
            DAMAGED. CROPS DAMAGED. HAIL LASTED 10 MINUTES. ALSO HAD
            0.80 INCHES OF RAIN. TIME ESTIMATED.

0545 PM     TSTM WND GST     TAYLOR                  46.90N 102.43W
08/15/2011  E68.00 MPH       STARK              ND   CO-OP OBSERVER

0555 PM     HAIL             16 SE AMIDON            46.32N 103.08W
08/15/2011  E0.88 INCH       SLOPE              ND   TRAINED SPOTTER

            HAIL LASTED ABOUT 20 MINUTES. 1.5 INCHES OF RAIN FELL IN
            30 MINUTES.

0557 PM     HAIL             5 N RICHARDTON          46.96N 102.32W
08/15/2011  M1.75 INCH       STARK              ND   COCORAHS

            HAIL STARTED APPROX AT 557 PM CDT AND WAS STILL OCCURRING
            WHEN REPORTED AT 610 PM CDT.

0625 PM     TSTM WND GST     5 NE REEDER             46.16N 102.87W
08/15/2011  E60.00 MPH       ADAMS              ND   TRAINED SPOTTER

0700 PM     HAIL             8 N GLEN ULLIN          46.93N 101.83W
08/15/2011  M1.00 INCH       MORTON             ND   TRAINED SPOTTER

            HAIL UP TO THE SIZE OF QUARTERS...WINDS ESTIMATED AT 40
            TO 50 MPH...HEAVY RAIN...

0705 PM     TSTM WND GST     10 SW REGENT            46.32N 102.71W
08/15/2011  E65.00 MPH       HETTINGER          ND   PUBLIC

            60 TO 70 MPH WIND GUST WITH PEA SIZED HAIL

0752 PM     HAIL             BUFFALO SPRINGS         46.17N 103.24W
08/15/2011  M1.00 INCH       BOWMAN             ND   TRAINED SPOTTER

            HAIL UP TO THE SIZE OF QUARTERS...STARTED APPROX. 752 PM
            CDT AND WAS STILL OCCURRING AT THE TIME OF CALL.

0758 PM     HAIL             4 NW SCRANTON           46.18N 103.21W
08/15/2011  M1.00 INCH       BOWMAN             ND   TRAINED SPOTTER

0825 PM     HAIL             NEW LEIPZIG             46.37N 101.95W
08/15/2011  E0.88 INCH       GRANT              ND   TRAINED SPOTTER

            NICKEL SIZED HAIL AND 50 MPH WIND GUST

0844 PM     TSTM WND GST     MANDAN                  46.83N 100.89W
08/15/2011  E87.00 MPH       MORTON             ND   AWOS

0853 PM     TSTM WND GST     BISMARCK                46.81N 100.78W
08/15/2011  M60.00 MPH       BURLEIGH           ND   AMATEUR RADIO

0905 PM     HAIL             9 SSE LEITH             46.23N 101.59W
08/15/2011  E1.00 INCH       GRANT              ND   TRAINED SPOTTER

            HAIL ONGOING.

0910 PM     TSTM WND GST     BISMARCK                46.81N 100.78W
08/15/2011  M71.00 MPH       BURLEIGH           ND   ASOS

0910 PM     HAIL             5 N BISMARCK            46.88N 100.78W
08/15/2011  M0.75 INCH       BURLEIGH           ND   NWS EMPLOYEE

            WINDS GUSTING TO 35 MPH.

0920 PM     FLASH FLOOD      BISMARCK                46.81N 100.78W
08/15/2011                   BURLEIGH           ND   TRAINED SPOTTER

            TRAINED SPOTTER REPORTED FLOODING AT THE BISMARCK
            EXPRESSWAY BRIDGE...CARS CANNOT DRIVE THROUGH WATER...
            OTHER REPORTS OF FLOODING ALONG BISMARCK EXPRESSWAY.

0930 PM     TSTM WND GST     7 E BISMARCK            46.81N 100.64W
08/15/2011  E70.00 MPH       BURLEIGH           ND   PUBLIC

            1.50 INCHES OF RAIN FELL IN A HALF HOUR.

0939 PM     FLASH FLOOD      BISMARCK                46.81N 100.78W
08/15/2011                   BURLEIGH           ND   NWS EMPLOYEE

            STREET FLOODING ON SOUTH 3RD ST CLOSE TO RENO. WATER UP
            TO SIDEWALKS.

0940 PM     FLASH FLOOD      BISMARCK                46.81N 100.78W
08/15/2011                   BURLEIGH           ND   AMATEUR RADIO

            ONE TO 2 FEET OF WATER FLOODING THE INTERSECTION OF
            AIRPORT ROAD AND UNIVERSITY DRIVE. ALSO 1 TO 2 FEET OF
            WATER FLOODING ALONG SOUTH 12TH STREET BETWEEN BASIN AVE
            AND EXPRESSWAY. FLOODING ALONG EXPRESSWAY BETWEEN SOUTH
            7TH TO AROUND WALMART.

0950 PM     HAIL             8 NE WING               47.22N 100.16W
08/15/2011  M1.00 INCH       BURLEIGH           ND   TRAINED SPOTTER

            HAIL LASTED FOR ABOUT 5 MINUTES

&&

JTAEGER

Special weather statement, Aug 15, 10:04 PM MDT, 1 hour 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1104 PM CDT MON AUG 15 2011

NDZ033-040-041-043-044-160500-
ADAMS-BOWMAN-HETTINGER-SLOPE-STARK-
1004 PM MDT MON AUG 15 2011

...SPECIAL WEATHER STATEMENT...

AT 1000 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM EXTREME SOUTH
CENTRAL STARK COUNTY TO NORTHWESTERN PERKINS COUNTY...MOVING EAST AT
30 MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...CONTINUOUS CLOUD TO GROUND
LIGHTNING...AND FREQUENT DOWNPOURS CAN BE EXPECTED WITH
THESE STORMS.

LOCATIONS IMPACTED INCLUDE...
  BUCYRUS...            HAVELOCK...           HETTINGER...
  LEFOR...              REGENT...             HAYNES...
  MOTT...               BURT...               BENTLEY...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE
PASSED.

HEINERT

Local storm report, Aug 15, 10:16 PM MDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1116 PM CDT MON AUG 15 2011

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

0915 PM     HAIL             10 N BISMARCK           46.95N 100.78W
08/15/2011  M1.00 INCH       BURLEIGH           ND   NWS EMPLOYEE

&&

NHEINERT

Local storm report, Aug 15, 10:23 PM MDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1123 PM CDT MON AUG 15 2011

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

1115 PM     TSTM WND GST     HETTINGER               46.00N 102.64W
08/15/2011  M63 MPH          ADAMS              ND   ASOS

&&

TMERRIMA

Special weather statement, Aug 15, 10:47 PM MDT, 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1147 PM CDT MON AUG 15 2011

NDZ037-047-048-050-051-160545-
DICKEY-LA MOURE-LOGAN-MCINTOSH-STUTSMAN-
1147 PM CDT MON AUG 15 2011

...SPECIAL WEATHER STATEMENT FOR THE JAMES RIVER VALLEY AREA OF
NORTH DAKOTA...

AT 1145 PM CDT...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM 15
MILES NORTHWEST OF JAMESTOWN TO 60 MILES SOUTHWEST OF
JAMESTOWN...MOVING EAST AT 30 MPH.

PEA SIZE HAIL...WIND GUSTS TO 35 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...AND BRIEF HEAVY DOWNPOURS...ARE FORECAST WITH THESE
STORMS.

SOME LOCATIONS THAT WILL GET A THUNDERSTORM BETWEEN NOW AND 1 AM CDT
INCLUDE...BUCHANAN...JAMESTOWN...SYDNEY...GACKLE...JUD...AND
EDGELEY.

JP MARTIN

Local storm report, Aug 15, 11:07 PM MDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1207 AM CDT TUE AUG 16 2011

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

0815 PM     HAIL             SCRANTON                46.15N 103.14W
08/15/2011  E2.00 INCH       BOWMAN             ND   PUBLIC

            PUBLIC REPORT RELAYED BY BROADCAST MEDIA...PICTURE WAS
            TAKEN OF HAIL STONE AND ESTIMATED SIZE WAS 2 INCHES IN
            DIAMETER

&&

LHUBER

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 15, 6:07 PM MDT	Severe Thunderstorm Warning	BIS	Morton	68 min
Aug 15, 6:10 PM MDT	Severe Thunderstorm Warning	BIS	McLean	65 min
Aug 15, 6:13 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	62 min
Aug 15, 6:20 PM MDT	Tornado Warning	BIS	Grant, Morton	25 min
Aug 15, 6:39 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	66 min
Aug 15, 7:03 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	57 min
Aug 15, 7:14 PM MDT	Severe Thunderstorm Warning	BIS	Grant, Hettinger	61 min
Aug 15, 7:47 PM MDT	Severe Thunderstorm Warning	BIS	Grant	28 min
Aug 15, 7:52 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	53 min
Aug 15, 8:09 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Morton, Sioux	66 min
Aug 15, 8:17 PM MDT	Severe Thunderstorm Warning	BIS	Grant	40 min
Aug 15, 8:18 PM MDT	Flash Flood Warning	BIS	Burleigh, Morton	6 hr
Aug 15, 8:25 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Kidder, Sheridan	44 min
Aug 15, 8:36 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Emmons, Kidder, Logan	54 min
Aug 15, 9:25 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	35 min
Aug 15, 10:21 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Grant, Hettinger, Sioux	54 min
Aug 16, 2:08 AM MDT	Areal Flood Advisory	BIS	Emmons, Logan, McIntosh	4 hr
Aug 16, 8:55 AM MDT	Wind Advisory	BIS	Adams, Billings, Bottineau, Bowman, Burke, Burleigh and 18 more	6 hr

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.