Alert archive / North Dakota / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 262, NWS Bismarck, ND

August 7, 2007McHenry County, Ward County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Aug 7, 2007, 9:32 PM CDT for McHenry County, Ward County, North Dakota. It was in force for 58 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 7, 2007, 9:32 PM CDT (02:32 UTC)
Expired: Aug 7, 2007, 10:30 PM CDT
In force: 58 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

Counties McHenry County, ND, Ward County, ND

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 7, 3:51 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 2.5 hours before the alert went out and 152 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 3014 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KBIS 080234
SVRBIS
NDC049-101-080330-
/O.NEW.KBIS.SV.W.0262.070808T0232Z-070808T0330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
932 PM CDT TUE AUG 7 2007

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCHENRY COUNTY IN NORTH CENTRAL NORTH DAKOTA...
  SOUTHEASTERN WARD COUNTY IN NORTH CENTRAL NORTH DAKOTA...

* UNTIL 1030 PM CDT

* AT 928 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORM OUTFLOW WINDS CAPABLE OF PRODUCING 
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE WINDS WERE LOCATED OVER 
  SOUTHERN AND CENTRAL MCHENRY COUNTY AND OVER SOUTHEAST WARD COUNTY...AND
  MOVING NORTH AT 35 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  VELVA...SIMCOE...LOGAN...DENBIGH...GRANVILLE...NORWICH...SURREY...
  DEERING AND BANTRY

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
TUESDAY EVENING FOR WESTERN NORTH DAKOTA.

LAT...LON 4786 10135 4788 10082 4790 10027 4851 10035
      4855 10089 4838 10115

$$

NH

2 follow-up statements

000 
WWUS53 KBIS 080306
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1004 PM CDT TUE AUG 7 2007

NDC049-101-080330-
/O.CON.KBIS.SV.W.0262.000000T0000Z-070808T0330Z/
MCHENRY ND-WARD ND-
1004 PM CDT TUE AUG 7 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT
FOR SOUTHEASTERN WARD AND MCHENRY COUNTIES...

AT 1003 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORM OUTFLOW WINDS CAPABLE OF PRODUCING 
DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE WINDS WERE LOCATED OVER 
SOUTHERN AND CENTRAL MCHENRY COUNTY AND OVER SOUTHEAST WARD COUNTY...AND
MOVING NORTH AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
NORWICH...SURREY...GRANVILLE...DENBIGH...TOWNER...DEERING AND BANTRY

WIND DAMAGE WITH THIS STORM WILL OCCUR WELL AHEAD OF ANY RAIN OR
LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE TAKING COVER.
SEEK SHELTER IMMEDIATELY INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.

LAT...LON 4786 10135 4788 10082 4790 10027 4851 10035
      4855 10089 4838 10115

$$

NH

000 
WWUS53 KBIS 080331
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
1030 PM CDT TUE AUG 7 2007

NDC049-101-080340-
/O.EXP.KBIS.SV.W.0262.000000T0000Z-070808T0330Z/
MCHENRY ND-WARD ND-
1030 PM CDT TUE AUG 7 2007

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WARD AND MCHENRY
COUNTIES EXPIRES AT 1030 PM CDT...

THE SEVERE THUNDERSTORM OUTFLOW HAS WEAKENED AND NO LONGER POSES A 
SIGNIFICANT THREAT. GUSTY SOUTHERLY WINDS OF 30 TO 40 MPH WILL 
CONTINUE OVER SOME AREAS FOR THE NEXT 15 TO 20 MINUTES. 

LAT...LON 4786 10135 4788 10082 4790 10027 4851 10035
      4855 10089 4838 10115

$$

NH

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 7, 3:23 PM CDT, 6 hours 9 minutes earlier.

Area forecast discussion, Aug 7, 3:23 PM CDT, 6 hours 9 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
323 PM CDT TUE AUG 7 2007

.SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT...
CONVECTION ALREADY BEGINNING ALONG DRY LINE IN WESTERN SOUTH DAKOTA
WITH SOME STORMS FORMING OFF THE HIGHER TERRAIN OF SOUTH CENTRAL AND
CENTRAL MONTANA AS WELL AS CU FIELD IN WESTERN NORTH DAKOTA.
FORECAST SOUNDINGS SOMEWHAT INVERTED V LOOKING SO WIND MAY BE AN
ISSUE AS THUNDERSTORMS MOVE IN LATER TONIGHT AS WELL AS LARGE HAIL.

SURFACE TROUGH FROM KGGW TO KMLS MOVING SLOWLY EAST AS MID LEVEL
TROUGH OVER NORTHERN ROCKIES BEGINS TO ACCELERATE TO THE EAST
REACHING NORTH DAKOTA BORDER BEFORE MIDNIGHT. TROUGH STALLS OVER
CENTRAL DAKOTAS OVERNIGHT AND WEDNESDAY FOR SCATTERED CONVECTION
ENDING FROM THE WEST WEDNESDAY AFTERNOON BUT CONTINUING EAST.

SHORTWAVE RIDGING ALLOWS A CHANCE FOR NO WEATHER IN GRIDS FOR
DAYTIME HOURS ON THURSDAY BEFORE ENERGY IN SOUTHWEST FLOW REACHES
WESTERN BORDER BY FRIDAY MORNING AND WITH LEE CYCLOGENSIS FRIDAY
MOVING AS DEEPER LOW ONTO NORTHERN PLAINS FRIDAY AFTERNOON AND
OVERNIGHT FOR MORE CHANCE POPS.

.LONG TERM...

&&

.AVIATION...

&&

.FIRE WEATHER...FIRE WEATHER ZONES 17/31/32/33/40/41/43/44 ALL
HAVE REACHED NEARLY TO RED FLAG WARNING CRITERIA OVER WESTERN NORTH
DAKOTA AT THIS TIME AND RED FLAG WARNING WHICH IS IN EFFECT WILL BE
CONTINUED.

&&

.BIS WATCHES/WARNINGS/ADVISORIES...
RED FLAG WARNING FROM 1 PM CDT /NOON MDT/ THIS AFTERNOON TO 7 PM
CDT /6 PM MDT/ THIS EVENING FOR NDZ017-031>033-040-041-043-044.

&&

HW/TSW

Hazardous weather outlook, Aug 7, 5:00 AM CDT, 16 hours 32 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BISMARCK ND
500 AM CDT TUE AUG 7 2007

NDZ001>005-009>013-017>023-025-031>037-040>048-050-051-080915-
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-
500 AM CDT TUE AUG 7 2007 /400 AM MDT TUE AUG 7 2007/

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

ISOLATED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON OVER WESTERN
NORTH DAKOTA WITH A POSSIBILITY OF SEVERE WEATHER MAINLY ALONG THE
MONTANA/NORTH DAKOTA BORDER. AN UPPER LEVEL DISTURBANCE WILL MOVE
ACROSS THE STATE TONIGHT WHICH WILL INITIATE ADDITIONAL SCATTERED
SHOWERS AND THUNDERSTORMS...SOME OF WHICH MAY BECOME SEVERE.

STRONG WIND AND LOW RELATIVE HUMIDITY WILL DEVELOP OVER FIRE WEATHER
ZONES 17/18/31/32/33/40/41/43/44 THIS AFTERNOON. A COLD FRONT WILL
MOVE FROM CENTRAL MONTANA INTO EASTERN MONTANA BY THIS EVENING
ALLOWING HIGH TEMPERATURES TO REACH THE LOWER 90S. MINIMUM
HUMIDITIES WILL FALL INTO THE LOWER AND MIDDLE 20 PERCENT RANGE WITH
SOUTHERLY WINDS GUSTING TO 25 MPH. A RED FLAG WARNING HAS BEEN
ISSUED FROM 1 PM CDT/NOON MDT/ THIS AFTERNOON TO 7 PM CDT/6 PM MDT
THIS EVENING.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A SLOW MOVING COLD FRONT WILL WEAKEN AS IT MOVES ACROSS NORTH
DAKOTA WEDNESDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS
OVER CENTRAL AND EASTERN NORTH DAKOTA WEDNESDAY AFTERNOON. THIS WEAK
SURFACE BOUNDARY WILL REMAIN OVER THE AREA DURING THE EXTENDED
PERIOD. UPPER AIR DISTURBANCES WILL MIGRATE THROUGH THE STATE
THURSDAY THROUGH MONDAY...THUS ISOLATED THUNDERSTORMS WILL CONTINUE
TO BE A THREAT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON...TONIGHT...AND
WEDNESDAY.

KS

In the hours before

Local storm report, Aug 7, 7:43 PM CDT, 1 hour 49 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
743 PM CDT TUE AUG 07 2007

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

0705 PM     HAIL             3 SW FAIRFIELD          47.15N 103.26W
08/07/2007  E0.75 INCH       BILLINGS           ND   TRAINED SPOTTER

            A FEW HAIL STONES TO THE SIZE OF PENNIES.

0615 PM     TSTM WND GST     GLADSTONE               46.86N 102.57W
08/07/2007  M69 MPH          STARK              ND   PUBLIC

            69 MPH WIND GUST MEASURED ON A HOME WEATHER STATION IN
            GLADSTONE. REPORT RELAYED BY LOCAL MEDIA.

&&

CJS/TWH

Local storm report, Aug 7, 7:53 PM CDT, 1 hour 39 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
753 PM CDT TUE AUG 07 2007

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

0642 PM     HAIL             8 NW KILLDEER           47.45N 102.87W
08/07/2007  E0.88 INCH       DUNN               ND   TRAINED SPOTTER

            NICKEL SIZE HAIL

&&

CJS/TWH

Local storm report, Aug 7, 7:55 PM CDT, 1 hour 37 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE BISMARCK ND
755 PM CDT TUE AUG 07 2007

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

0742 PM     HAIL             8 NW KILLDEER           47.45N 102.87W
08/07/2007  E0.88 INCH       DUNN               ND   TRAINED SPOTTER

            NICKEL SIZE HAIL

&&

CJS/TWH

Local storm report, Aug 7, 8:32 PM CDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
832 PM CDT TUE AUG 07 2007

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

0600 PM     TSTM WND GST     1 W HALLIDAY            47.35N 102.36W
08/07/2007  E72 MPH          DUNN               ND   PUBLIC

            HOME WEATHER STATION MEASURED 72 MPH WIND GUSTS. PEA SIZE
            HAIL ACCOMPANIED THE STORM AND COVERED THE GROUND.

&&

CJS/TWH

Local storm report, Aug 7, 9:18 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
918 PM CDT TUE AUG 07 2007

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

0908 PM     TSTM WND GST     GARRISON                47.65N 101.42W
08/07/2007  M66.00 MPH       MCLEAN             ND   ASOS

            GARRISION AUTOMATED SURFACE OBSERVING SYSTEM...ASOS...
            RECORDED A 66 MPH WIND GUST AT 908 PM CDT.

&&

CJS/TWH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:30 PM CDT	Severe Thunderstorm Warning	BIS	Dunn	45 min
Aug 7, 8:30 PM CDT	Severe Thunderstorm Warning	BIS	Ward	30 min
Aug 7, 8:46 PM CDT	Severe Thunderstorm Warning	BIS	Mountrail	28 min
Aug 7, 9:08 PM CDT	Severe Thunderstorm Warning	BIS	McLean	67 min
Aug 7, 9:21 PM CDT	Severe Thunderstorm Warning	BIS	Bottineau	24 min
Aug 8, 2:59 AM CDT	Severe Thunderstorm Warning	BIS	Adams, Hettinger	31 min
Aug 8, 7:03 AM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	27 min
Aug 8, 2:48 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Morton, Stark	57 min
Aug 8, 2:57 PM CDT	Severe Thunderstorm Warning	BIS	Foster, Stutsman	30 min
Aug 8, 3:45 PM CDT	Severe Thunderstorm Warning	BIS	Grant	60 min
Aug 8, 4:33 PM CDT	Tornado Warning	BIS	Kidder	27 min
Aug 8, 5:34 PM CDT	Severe Thunderstorm Warning	BIS	LaMoure	56 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2007 Every severe thunderstorm warning in 2007

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.