Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 24, NWS Grand Forks, ND

July 9, 2007Benson County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 9, 2007, 8:49 PM CDT for Benson County, North Dakota. It was in force for 38 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 9, 2007, 8:49 PM CDT (01:49 UTC)
Expired
Jul 9, 2007, 9:27 PM CDT
In force
38 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Benson County, ND

What was reported inside it

TimeReportWhereRemark
Jul 9, 8:55 PM CDTHAIL 0.755 S Pleasant Lake, ND

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 9, 5:15 PM CDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.8 hours before the alert went out and 186 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2007-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 239 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2007-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
239 J/kg
Mixed-layer CIN
-107 J/kg
Mixed-layer LCL
1699 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
304 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFGF 100149
TORFGF
NDC005-100245-
/O.NEW.KFGF.TO.W.0024.070710T0149Z-070710T0245Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
849 PM CDT MON JUL 9 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN BENSON COUNTY IN NORTHEAST NORTH DAKOTA...

* UNTIL 945 PM CDT

* AT 846 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES SOUTH OF
  PLEASANT LAKE...OR 44 MILES WEST OF DEVILS LAKE...MOVING TO THE
  EAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  YORK AT 900 PM CDT...
  LEEDS AT 910 PM CDT...

IF YOU ARE IN THE PATH OF A TORNADO THE SAFEST PLACE IS A BASEMENT.
GET UNDER A STAIRWAY OR A PIECE OF STURDY FURNITURE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
TUESDAY MORNING FOR NORTHEAST NORTH DAKOTA.

LAT...LON 4836 9984 4821 9984 4818 9944 4836 9944

$$

GUST
2 follow-up statements
000 
WWUS53 KFGF 100215
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
915 PM CDT MON JUL 9 2007

NDC005-100245-
/O.CON.KFGF.TO.W.0024.000000T0000Z-070710T0245Z/
BENSON ND-
915 PM CDT MON JUL 9 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR
NORTHWESTERN BENSON COUNTY...

AT 912 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE TORNADO WAS LOCATED
3 MILES SOUTHWEST OF LEEDS...OR 31 MILES WEST OF DEVILS LAKE...MOVING
TO THE EAST AT 30 MPH.

IF YOU ARE IN THE PATH OF A TORNADO THE SAFEST PLACE IS A BASEMENT.
GET UNDER A STAIRWAY OR A PIECE OF STURDY FURNITURE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
TUESDAY MORNING FOR NORTHEAST NORTH DAKOTA.

LAT...LON 4836 9984 4821 9984 4818 9937 4836 9936

$$

GUST
000 
WWUS53 KFGF 100227
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
928 PM CDT MON JUL 9 2007

NDC005-100238-
/O.CAN.KFGF.TO.W.0024.000000T0000Z-070710T0245Z/
BENSON ND-
928 PM CDT MON JUL 9 2007

...THE TORNADO WARNING FOR NORTHWESTERN BENSON COUNTY IS CANCELLED...

AT 925 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM LOCATED 5 MILES NORTH OF BRINSMADE...OR 24 MILES
NORTHWEST OF DEVILS LAKE...MOVING TO THE EAST AT 30 MPH.

THE THUNDERSTORM HAS WEAKENED AND WAS NO LONGER CONSIDERED SEVERE. SO
THE WARNING HAS BEEN CANCELLED. 

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 100 AM CDT
TUESDAY MORNING FOR NORTHEAST NORTH DAKOTA.

LAT...LON 4836 9984 4821 9984 4818 9937 4836 9936

$$

GUST

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 9, 8:30 PM CDTSevere Thunderstorm WarningFGFBenson60 min
Jul 9, 9:31 PM CDTSevere Thunderstorm WarningFGFBenson, Ramsey21 min
Jul 10, 3:20 AM CDTHigh Wind WarningFGFNelson, Ramsey, Walsh100 min
Jul 10, 4:36 AM CDTWind AdvisoryFGFBarnes, Benson, Cass, Cavalier, Eddy, Grand Forks and 11 more11 hr
Jul 10, 6:22 AM CDTHigh Wind WarningFGFCass98 min

Nearby

Tornado Warnings in North Dakota, 2007Every tornado warning in 2007Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.