Alert archive / North Dakota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 159, NWS Bismarck, ND

July 22, 20114 counties in North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 22, 2011, 7:10 PM MDT for 4 counties in North Dakota. It was in force for 65 min. 3 reports 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, 7:10 PM MDT (01:10 UTC)
Expired: Jul 22, 2011, 8:15 PM MDT
In force: 65 min
Issued by: NWS Bismarck, ND
Area: Storm-based polygon
Hail: 1.0 in
Wind: 80.0 mph

Counties Billings County, ND, Dunn County, ND, Golden Valley County, ND, Stark County, ND

The radar

The Bismarck radar (KBIS), 190 km from the middle of the area, began a volume at 01:09 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, 7:35 PM MDT	TORNADO	Belfield, ND	TRAINED WEATHER SPOTTER REPORTED DEBRIS ON THE SOUTH SIDE OF CITY...NO VISIBLE FUNNEL...
Jul 22, 8:05 PM MDT	TORNADO	14 Sse Belfield, ND	TORNADO REPORTED BY FIRE DEPARTMENT. TORNADO LASTED 5 MINUTES.
Jul 22, 8:14 PM MDT	HAIL 0.75	3 S Marshall, ND	ND ATMOSHPERIC RESOURCE BOARD OBSERVER REPORT.

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

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 22, 4:35 PM MDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.2 hours before the alert went out and 194 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.

081 
WUUS53 KBIS 230110
SVRBIS
NDC007-025-033-089-230215-
/O.NEW.KBIS.SV.W.0159.110723T0110Z-110723T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
710 PM MDT FRI JUL 22 2011

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BILLINGS COUNTY IN SOUTHWEST NORTH DAKOTA...
  SOUTHERN DUNN COUNTY IN SOUTHWEST NORTH DAKOTA...
  SOUTHERN GOLDEN VALLEY COUNTY IN SOUTHWEST NORTH DAKOTA...
  STARK COUNTY IN SOUTHWEST NORTH DAKOTA...

* UNTIL 815 PM MDT

* AT 705 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS
  WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF
  FAIRFIELD TO 8 MILES SOUTHWEST OF MUD BUTTES...AND MOVING EAST AT
  55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  DICKINSON...SOUTH FAIRFIELD...FRYBURG...BELFIELD...SOUTH HEART...  
  MANNING...NEW HRADEC...SCHEFIELD...HIRSCHVILLE...                  
  GLADSTONE...MARSHALL...LEFOR... AND RICHARDTON.

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.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM MDT SATURDAY MORNING
FOR NORTH DAKOTA.

LAT...LON 4726 10342 4725 10214 4663 10210 4663 10380
      4656 10380 4655 10406
TIME...MOT...LOC 0109Z 273DEG 46KT 4727 10320 4598 10386
WIND...HAIL 80MPH 1.00IN

$$

SIMOSKO/SCHECK

1 follow-up statement

215 
WWUS53 KBIS 230133
SVSBIS

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

NDC033-230143-
/O.CAN.KBIS.SV.W.0159.000000T0000Z-110723T0215Z/
GOLDEN VALLEY ND-
733 PM MDT FRI JUL 22 2011

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN GOLDEN VALLEY COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4726 10342 4725 10215 4663 10210 4663 10361
      4698 10361 4698 10367
TIME...MOT...LOC 0133Z 273DEG 46KT 4725 10275 4596 10342

$$

NDC007-025-089-230215-
/O.CON.KBIS.SV.W.0159.000000T0000Z-110723T0215Z/
BILLINGS ND-STARK ND-DUNN ND-
733 PM MDT FRI JUL 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
DUNN...STARK AND BILLINGS COUNTIES UNTIL 815 PM MDT...

AT 728 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 80 MPH.  THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM MANNING TO 11 MILES NORTHWEST OF
LUDLOW...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  DICKINSON...DICKINSON REGIONAL AIRPORT...SCHEFIELD...HIRSCHVILLE...
  GLADSTONE...MARSHALL...LEFOR...TAYLOR AND RICHARDTON.

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.

&&

LAT...LON 4726 10342 4725 10215 4663 10210 4663 10361
      4698 10361 4698 10367
TIME...MOT...LOC 0133Z 273DEG 46KT 4725 10275 4596 10342
WIND...HAIL 80MPH 1.00IN

$$

SIMOSKO/SCHECK

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, 6:18 PM MDT, 52 minutes earlier.

Area forecast discussion, Jul 22, 6:18 PM MDT, 52 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, 3:41 AM MDT, 15 hours 29 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, 5:16 PM MDT, 1 hour 54 minutes before

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

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

0610 PM     HAIL             ALMONT                  46.73N 101.50W
07/22/2011  M0.25 INCH       MORTON             ND   TRAINED SPOTTER

            HEAVY RAIN AND PEA SIZED HAIL

&&

LHUBER

Local storm report, Jul 22, 5:46 PM MDT, 1 hour 24 minutes before

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

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

0640 PM     TORNADO          35 SSW MANDAN           46.36N 101.17W
07/22/2011                   GRANT              ND   PUBLIC

            PUBLIC SPOTTED DEBRIS FROM GREAT DISTANCE FROM STORM.

&&

LHUBER

Local storm report, Jul 22, 5:48 PM MDT, 1 hour 22 minutes before

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

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

0635 PM     HAIL             ALMONT                  46.73N 101.50W
07/22/2011  E1.00 INCH       MORTON             ND   TRAINED SPOTTER

            HAIL ONGOING AT 645 PM. GROUND WHITE WITH HAIL AND HAIL
            SIZE IS INCREASING. VERY HEAVY RAIN. WIND SPEED 20 MPH.

&&

JP MARTIN

Local storm report, Jul 22, 6:08 PM MDT, 1 hour 2 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BISMARCK ND
708 PM CDT FRI JUL 22 2011

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

0640 PM     TORNADO          35 WSW MANDAN           46.63N 101.57W
07/22/2011                   MORTON             ND   PUBLIC

            PUBLIC SPOTTED DEBRIS FROM GREAT DISTANCE FROM STORM.

&&

LHUBER

Local storm report, Jul 22, 6:53 PM MDT, 17 minutes before

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

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

0740 PM     TSTM WND GST     BEACH                   46.92N 104.00W
07/22/2011  M66 MPH          GOLDEN VALLEY      ND   CO-OP OBSERVER

            PEAK GUST OF 66 MPH WITH SUSTAINED WINDS AT 30 TO 35 MPH.

&&

LHUBER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 22, 6:15 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Bowman, Golden Valley, Slope	60 min
Jul 22, 6:40 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, Golden Valley, McKenzie, Williams	65 min
Jul 22, 6:48 PM MDT	Flash Flood Warning	BIS	Dunn, McKenzie	6 hr
Jul 22, 7:04 PM MDT	Flash Flood Warning	BIS	Billings, Dunn, Golden Valley, McKenzie, Stark	6 hr
Jul 22, 7:06 PM MDT	Tornado Warning	BIS	Dunn, McKenzie	39 min
Jul 22, 7:15 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger, Slope	60 min
Jul 22, 7:18 PM MDT	Tornado Warning	BIS	Billings, Stark	27 min
Jul 22, 7:32 PM MDT	Severe Thunderstorm Warning	BIS	Billings, Dunn, McKenzie, McLean, Mercer, Mountrail	58 min
Jul 22, 7:41 PM MDT	Tornado Warning	BIS	Billings, Stark	34 min
Jul 22, 7:49 PM MDT	Flash Flood Warning	BIS	Dunn, McLean, Mercer, Mountrail	6 hr
Jul 22, 7:55 PM MDT	Tornado Warning	BIS	Dunn	35 min
Jul 22, 8:08 PM MDT	Tornado Warning	BIS	Hettinger, Slope, Stark	37 min
Jul 22, 8:13 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, Mercer, Morton, Oliver, Stark	62 min
Jul 22, 8:15 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Grant, Hettinger	60 min
Jul 22, 8:22 PM MDT	Severe Thunderstorm Warning	BIS	Dunn, McLean, Mercer, Mountrail, Oliver, Ward	53 min
Jul 22, 8:33 PM MDT	Tornado Warning	BIS	Hettinger, Slope	27 min
Jul 22, 8:51 PM MDT	Tornado Warning	BIS	McLean, Mercer	24 min
Jul 22, 8:56 PM MDT	Tornado Warning	BIS	Adams, Grant, Hettinger	34 min
Jul 22, 9:00 PM MDT	Tornado Warning	BIS	Morton, Oliver	30 min
Jul 22, 9:12 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton, Oliver	63 min
Jul 22, 9:14 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, McLean, Mercer, Oliver, Sheridan	61 min
Jul 22, 9:16 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Burleigh, Emmons, Grant, Hettinger, Morton and 1 more	59 min
Jul 22, 9:25 PM MDT	Tornado Warning	BIS	Adams, Grant, Hettinger, Sioux	35 min
Jul 22, 9:27 PM MDT	Tornado Warning	BIS	Burleigh, Morton, Oliver	33 min
Jul 22, 9:51 PM MDT	Tornado Warning	BIS	Burleigh, Emmons, Morton, Sioux	24 min
Jul 22, 10:02 PM MDT	Tornado Warning	BIS	Adams, Sioux	13 min
Jul 22, 10:07 PM MDT	Severe Thunderstorm Warning	BIS	Burleigh, Foster, Kidder, Morton, Sheridan, Stutsman and 1 more	68 min
Jul 22, 10:08 PM MDT	Severe Thunderstorm Warning	BIS	McLean, Oliver, Sheridan, Wells	67 min
Jul 22, 10:11 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Emmons, Grant, Logan, Morton, Sioux	64 min
Jul 22, 10:55 PM MDT	High Wind Warning	BIS	Burke, Divide, Dunn, McKenzie, Mountrail, Renville and 1 more	3 hr
Jul 22, 10:59 PM MDT	Areal Flood Advisory	BIS	Dickey, Foster, Kidder, LaMoure, Logan, McIntosh and 2 more	6 hr
Jul 22, 11:08 PM MDT	Severe Thunderstorm Warning	BIS	Dickey, Emmons, LaMoure, Logan, McIntosh, Sioux	52 min
Jul 22, 11:14 PM MDT	Flash Flood Warning	BIS	Foster, Kidder, Stutsman, Wells	6 hr
Jul 22, 11:16 PM MDT	Severe Thunderstorm Warning	BIS	Kidder, Stutsman	59 min
Jul 22, 11:21 PM MDT	Severe Thunderstorm Warning	BIS	Adams, Bowman, Hettinger	54 min
Jul 22, 11:57 PM MDT	Severe Thunderstorm Warning	BIS	Dickey, Kidder, LaMoure, Logan, McIntosh	63 min
Jul 23, 12:09 AM MDT	Severe Thunderstorm Warning	BIS	Stutsman	66 min
Jul 23, 12:15 AM MDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	60 min
Jul 23, 12:28 AM MDT	Areal Flood Advisory	BIS	Adams, Hettinger	4 hr
Jul 23, 12:55 AM MDT	Severe Thunderstorm Warning	BIS	Dickey, LaMoure	50 min
Jul 23, 1:01 AM MDT	Areal Flood Warning	BIS	Dunn, McKenzie	12 hr
Jul 23, 2:04 AM MDT	Wind Advisory	BIS	Bottineau, Burke, Burleigh, Dickey, Emmons, Foster and 15 more	4 hr
Jul 23, 5:01 AM MDT	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.