Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 166, NWS Bismarck, ND

July 22, 20115 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 22, 2011, 10:14 PM CDT for 5 counties in North Dakota. It was in force for 61 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 22, 2011, 10:14 PM CDT (03:14 UTC)
Expired: Jul 22, 2011, 11:15 PM CDT
In force: 61 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Burleigh County, ND, McLean County, ND, Mercer County, ND, Oliver County, ND, Sheridan County, ND

The radar

The Bismarck radar (KBIS), 82 km from the middle of the area, began a volume at 03:15 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

Time	Report	Where	Remark
Jul 22, 10:54 PM CDT	TSTM WND DMG	Lake Sakakawea State Pa, ND	CAMPERS FLIPPER OVER FROM WINDS. REPORT RELAYED BY MEDIA.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 40 minutes after it went out.

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 22, 5:35 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.2 hours before the alert went out and 83 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: 1986 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 1048 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

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

824 
WUUS53 KBIS 230314
SVRBIS
NDC015-055-057-065-083-230415-
/O.NEW.KBIS.SV.W.0166.110723T0314Z-110723T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
1014 PM CDT FRI JUL 22 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN BURLEIGH COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  MCLEAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  NORTHEASTERN MERCER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  NORTHERN OLIVER COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  WESTERN SHERIDAN COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 1115 PM CDT.

* AT 1008 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTH OF PLAZA TO FORT
  STEVENSON STATE PARK TO STANTON TO CENTER...AND MOVING EAST AT 40
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  GARRISON...COLEHARBOR...HENSLER...FALKIRK...UNDERWOOD...WASHBURN...
  CROSS RANCH STATE PARK...SANGER...MAX...WILTON...TURTLE LAKE...
  BENEDICT...NEW JOHNS LAKE...MERCER...STRAWBERRY LAKE...RUSO...
  REGAN...MCCLUSKY...BUTTE AND WING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THESE STORMS...TAKE SHELTER IN A STURDY
BUILDING...AND STAY AWAY FROM WINDOWS.

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

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

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SATURDAY MORNING
FOR NORTH DAKOTA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL 200 AM
CDT SATURDAY MORNING FOR SOUTHEAST NORTH DAKOTA.

LAT...LON 4759 10039 4736 10027 4713 10026 4717 10160
      4735 10162 4758 10174 4784 10197 4785 10062
TIME...MOT...LOC 0314Z 269DEG 36KT 4815 10194 4760 10142
          4736 10129 4715 10127
WIND...HAIL 60MPH 1.00IN

$$

TM/AYD

2 follow-up statements

115 
WWUS53 KBIS 230338
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1038 PM CDT FRI JUL 22 2011

NDC015-055-057-065-083-230415-
/O.CON.KBIS.SV.W.0166.000000T0000Z-110723T0415Z/
BURLEIGH ND-MCLEAN ND-MERCER ND-OLIVER ND-SHERIDAN ND-
1038 PM CDT FRI JUL 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
SHERIDAN...NORTHERN OLIVER...NORTHEASTERN MERCER...MCLEAN AND
NORTHERN BURLEIGH COUNTIES UNTIL 1115 PM CDT...

AT 1033 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 8 MILES SOUTHWEST OF DES LACS TO
6 MILES NORTHEAST OF COLEHARBOR TO 5 MILES EAST OF FALKIRK TO
SANGER...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  TURTLE LAKE...WILTON...BENEDICT...NEW JOHNS LAKE...MERCER...
  STRAWBERRY LAKE...RUSO...REGAN...MCCLUSKY...BUTTE AND WING.

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.

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

&&

LAT...LON 4759 10039 4736 10027 4713 10026 4717 10160
      4735 10162 4758 10174 4784 10197 4785 10062
TIME...MOT...LOC 0337Z 270DEG 39KT 4816 10157 4760 10105
          4736 10092 4715 10091
WIND...HAIL 60MPH 1.00IN

$$

MERRIMAN

379 
WWUS53 KBIS 230358
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1058 PM CDT FRI JUL 22 2011

NDC015-055-057-065-083-230415-
/O.CON.KBIS.SV.W.0166.000000T0000Z-110723T0415Z/
BURLEIGH ND-MCLEAN ND-MERCER ND-OLIVER ND-SHERIDAN ND-
1058 PM CDT FRI JUL 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WESTERN
SHERIDAN...NORTHERN OLIVER...EAST CENTRAL MERCER...EASTERN MCLEAN AND
NORTHERN BURLEIGH COUNTIES UNTIL 1115 PM CDT...

AT 1052 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 5 MILES SOUTH OF MINOT TO 7 MILES
NORTHEAST OF TURTLE LAKE TO NEW JOHNS LAKE TO 6 MILES EAST OF
WILTON...MOVING EAST AT 45 MPH.

LOCATIONS IMPACTED INCLUDE...
  STRAWBERRY LAKE...RUSO...REGAN...MCCLUSKY...BUTTE AND WING.

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.

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

&&

LAT...LON 4735 10139 4755 10132 4784 10139 4785 10062
      4759 10039 4736 10027 4713 10026 4717 10160
TIME...MOT...LOC 0357Z 270DEG 39KT 4816 10124 4760 10072
          4736 10060 4715 10059
WIND...HAIL 60MPH 1.00IN

$$

TM/AYD

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 22, 7:18 PM CDT, 2 hours 56 minutes earlier.

Area forecast discussion, Jul 22, 7:18 PM CDT, 2 hours 56 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
718 PM CDT FRI JUL 22 2011

.UPDATE...
TORNADO WATCHES 673 AND 674 ARE IN EFFECT FOR LARGE PARTS OF THE
COUNTY WARNING AREA UNTIL 2 AM CDT SATURDAY. SEE PRODUCT BISWCNBIS
REDEFINING STATEMENT FOR DETAILS.

&&

.DISCUSSION...
ISOLATED SEVERE THUNDERSTORMS HAVE DEVELOPED OVER WESTERN NORTH
DAKOTA. A LINE OF SEVERE STORMS IN EASTERN MONTANA WAS ADVANCING
TOWARD THE NORTH DAKOTA BORDER WITH WINDS 65 TO 75 MPH REPORTED
THROUGH EASTERN MONTANA.

THUNDERSTORM CHANCES ARE VERY HIGH THIS EVENING WEST...INCREASING
CENTRAL AFTER 9 PM CDT.

&&
.AVIATION...
TAFS REFLECT TIMING OF EXPECTED STORMS. AVIATION INTERESTS NEED
TO BE AWARE THAT THERE WILL BE SEVERE STORMS THIS EVENING AND
POSSIBLY OVERNIGHT...SPREADING WEST TO EAST. STORMS WILL BE
CAPABLE OF PRODUCING HIGH WINDS...LARGE HAIL...VERY HEAVY
RAIN...AND TORNADOES.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
FLASH FLOOD WATCH FROM 1 AM CDT SATURDAY THROUGH SATURDAY
AFTERNOON FOR NDZ002>005-010>013-019>023-025-035>037-047-048-050-
051.

FLASH FLOOD WATCH UNTIL 7 AM CDT /6 AM MDT/ SATURDAY FOR NDZ001-
009-017-018-031>034-040>046.

&&

JP MARTIN

Hazardous weather outlook, Jul 22, 4:41 AM CDT, 17 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
441 AM CDT FRI JUL 22 2011

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-230945-
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-
441 AM CDT FRI JUL 22 2011 /341 AM MDT FRI JUL 22 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

SEVERE THUNDERSTORMS ARE EXPECTED TO INITIATE ACROSS WESTERN AND
FAR SOUTH CENTRAL NORTH DAKOTA LATE FRIDAY AFTERNOON. VERY LARGE
HAIL IN EXCESS OF TWO INCHES IN DIAMETER...DAMAGING WINDS IN
EXCESS OF 60 MPH AND A TORNADO OR TWO MAY BE POSSIBLE WITH THESE
STORMS...IN ADDITION TO HEAVY RAINFALL.

THUNDERSTORM COVERAGE IS EXPECTED TO INCREASE ACROSS THE WEST AND
CENTRAL FRIDAY NIGHT INTO SATURDAY MORNING...WITH THE PRIMARY
THREATS TRANSITIONING TO DAMAGING WINDS AND POTENTIAL FLASH
FLOODING. WHILE LOCATIONS THAT HAVE RECEIVED SIGNIFICANT RAINFALL
OVER THE PAST WEEK ARE MOST SUSCEPTIBLE TO FLASH FLOODING...THE
THREAT OF MANY AREAS BEING IMPACTED BY MULTIPLE THUNDERSTORMS WITH
RAINFALL RATES OF ONE TO TWO INCHES PER HOUR SUGGEST FLASH
FLOODING MAY BE POSSIBLE ACROSS ALL OF WESTERN AND CENTRAL NORTH
DAKOTA FRIDAY EVENING INTO SATURDAY MORNING. A FLASH FLOOD WATCH
HAS BEEN ISSUED FOR ALL OF WESTERN AND CENTRAL NORTH DAKOTA FOR FRIDAY
EVENING AND NIGHT INTO SATURDAY MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THUNDERSTORMS...SOME STRONG WITH HEAVY RAINFALL...ARE LIKELY
ACROSS CENTRAL NORTH DAKOTA THROUGH SATURDAY AFTERNOON.

AN ACTIVE WEATHER PATTERN IS FORECAST TO RETURN TO WESTERN AND
CENTRAL NORTH DAKOTA MONDAY NIGHT INTO THURSDAY...WITH MULTIPLE
ROUNDS OF THUNDERSTORMS POSSIBLE DURING THIS TIME FRAME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED LATE FRIDAY AFTERNOON
INTO SATURDAY MORNING.

AYD

In the hours before

Local storm report, Jul 22, 9:33 PM CDT, 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
933 PM CDT FRI JUL 22 2011

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

0823 PM     TORNADO          1 S THEODORE ROOSEVELT  47.59N 103.26W
07/22/2011                   MCKENZIE           ND   LAW ENFORCEMENT

            WITNESSES AND FIRE DEPARTMENT REPORTED ONE SEMI WAS
            PICKED UP AND HIT ANOTHER.

&&

PAYD

Local storm report, Jul 22, 9:35 PM CDT, 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
935 PM CDT FRI JUL 22 2011

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

0905 PM     TSTM WND GST     17 SW RHAME             46.06N 103.91W
07/22/2011  E60 MPH          BOWMAN             ND   TRAINED SPOTTER

            LATE REPORT.

&&

JP MARTIN

Local storm report, Jul 22, 9:38 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
938 PM CDT FRI JUL 22 2011

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

0905 PM     FLASH FLOOD      MEDORA                  46.91N 103.52W
07/22/2011                   BILLINGS           ND   PUBLIC

            CAMP GROUNDS FLOODED. RAINFALL ESTIMATED AT 3 TO 4
            INCHES.

&&

JP MARTIN

Local storm report, Jul 22, 9:53 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
953 PM CDT FRI JUL 22 2011

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

0930 PM     HAIL             ZAP                     47.29N 101.92W
07/22/2011  M1.25 INCH       MERCER             ND   TRAINED SPOTTER

            HAIL UP TO THE SIZE OF HALF DOLLARS...WITH HEAVY RAIN

&&

LHUBER

Local storm report, Jul 22, 9:54 PM CDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
954 PM CDT FRI JUL 22 2011

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

0953 PM     HEAVY RAIN       10 NE DUNN CENTER       47.46N 102.47W
07/22/2011  M2.45 INCH       DUNN               ND   MESONET

            2.45 INCHES IN 1 HOUR...

&&

LHUBER

Local storm report, Jul 22, 10:02 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1002 PM CDT FRI JUL 22 2011

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

1001 PM     HAIL             REGENT                  46.42N 102.56W
07/22/2011  E1.00 INCH       HETTINGER          ND   TRAINED SPOTTER

            PENNY TO QUARTER SIZE HAIL.

&&

PAYD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 7:15 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Bowman, Golden Valley, Slope	60 min
Jul 22, 7:40 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Golden Valley, McKenzie, Williams	65 min
Jul 22, 7:48 PM CDT	Flash Flood Warning	BIS	Dunn, McKenzie	6 hr
Jul 22, 8:04 PM CDT	Flash Flood Warning	BIS	Billings, Dunn, Golden Valley, McKenzie, Stark	6 hr
Jul 22, 8:06 PM CDT	Tornado Warning	BIS	Dunn, McKenzie	39 min
Jul 22, 8:10 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Golden Valley, Stark	65 min
Jul 22, 8:15 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	60 min
Jul 22, 8:18 PM CDT	Tornado Warning	BIS	Billings, Stark	27 min
Jul 22, 8:32 PM CDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie, McLean, Mercer, Mountrail	58 min
Jul 22, 8:41 PM CDT	Tornado Warning	BIS	Billings, Stark	34 min
Jul 22, 8:49 PM CDT	Flash Flood Warning	BIS	Dunn, McLean, Mercer, Mountrail	6 hr
Jul 22, 8:55 PM CDT	Tornado Warning	BIS	Dunn	35 min
Jul 22, 9:08 PM CDT	Tornado Warning	BIS	Hettinger, Slope, Stark	37 min
Jul 22, 9:13 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver, Stark	62 min
Jul 22, 9:15 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Grant, Hettinger	60 min
Jul 22, 9:22 PM CDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Mountrail, Oliver, Ward	53 min
Jul 22, 9:33 PM CDT	Tornado Warning	BIS	Hettinger, Slope	27 min
Jul 22, 9:51 PM CDT	Tornado Warning	BIS	McLean, Mercer	24 min
Jul 22, 9:56 PM CDT	Tornado Warning	BIS	Adams, Grant, Hettinger	34 min
Jul 22, 10:00 PM CDT	Tornado Warning	BIS	Morton, Oliver	30 min
Jul 22, 10:12 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	63 min
Jul 22, 10:16 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Burleigh, Emmons, Grant, Hettinger, Morton and 1 more	59 min
Jul 22, 10:25 PM CDT	Tornado Warning	BIS	Adams, Grant, Hettinger, Sioux	35 min
Jul 22, 10:27 PM CDT	Tornado Warning	BIS	Burleigh, Morton, Oliver	33 min
Jul 22, 10:51 PM CDT	Tornado Warning	BIS	Burleigh, Emmons, Morton, Sioux	24 min
Jul 22, 11:02 PM CDT	Tornado Warning	BIS	Adams, Sioux	13 min
Jul 22, 11:07 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Foster, Kidder, Morton, Sheridan, Stutsman and 1 more	68 min
Jul 22, 11:08 PM CDT	Severe Thunderstorm Warning	BIS	McLean, Oliver, Sheridan, Wells	67 min
Jul 22, 11:11 PM CDT	Severe Thunderstorm Warning	BIS	Adams, Emmons, Grant, Logan, Morton, Sioux	64 min
Jul 22, 11:55 PM CDT	High Wind Warning	BIS	Burke, Divide, Dunn, McKenzie, Mountrail, Renville and 1 more	3 hr
Jul 22, 11:59 PM CDT	Areal Flood Advisory	BIS	Dickey, Foster, Kidder, LaMoure, Logan, McIntosh and 2 more	6 hr
Jul 23, 12:08 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux	52 min
Jul 23, 12:14 AM CDT	Flash Flood Warning	BIS	Foster, Kidder, Stutsman, Wells	6 hr
Jul 23, 12:16 AM CDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	59 min
Jul 23, 12:21 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger	54 min
Jul 23, 12:57 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, Kidder, LaMoure, Logan, McIntosh	63 min
Jul 23, 1:09 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	66 min
Jul 23, 1:15 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	60 min
Jul 23, 1:28 AM CDT	Areal Flood Advisory	BIS	Adams, Hettinger	4 hr
Jul 23, 1:55 AM CDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	50 min
Jul 23, 2:01 AM CDT	Areal Flood Warning	BIS	Dunn, McKenzie	12 hr
Jul 23, 3:04 AM CDT	Wind Advisory	BIS	Bottineau, Burke, Burleigh, Dickey, Emmons, Foster and 15 more	4 hr
Jul 23, 6:01 AM CDT	Areal Flood Warning	BIS	Foster, Kidder, Stutsman, Wells	8 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.