Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 35, NWS Grand Forks, ND

August 26, 2007Pembina County, Walsh County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 26, 2007, 7:17 PM CDT for Pembina County, Walsh County, North Dakota. It was in force for 58 min. 5 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
Aug 26, 2007, 7:17 PM CDT (00:17 UTC)
Expired
Aug 26, 2007, 8:15 PM CDT
In force
58 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

Counties Pembina County, ND, Walsh County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 109 km from the middle of the area, began a volume at 00:20 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

TimeReportWhereRemark
Aug 26, 7:35 PM CDTTSTM WND DMG4 Se Hoople, NDNUMEROUS TREES BLOWN DOWN IN FARMSTEAD. DIAMETER UNKNOWN.
Aug 26, 7:35 PM CDTHAIL 2.752 S Hoople, NDMOSTLY GOLFBALL HAIL...LARGEST HAIL APPEARED TO BE AGGREGATE TYPE.
Aug 26, 7:40 PM CDTTORNADO 03 Nw Nash, NDORIGINALLY REPORTED AS NUMEROUS PUBLIC CALLS TO 911 DISPATCH IN GRAFTON ND. THE TORNADO TRACKED FOR ABOUT 3 MILES TO 1.8 NNE OF NASH BY 746 PM CDT. NUMEROUS BRANCHES WERE BROKEN DOWN AND SEVERAL TREE TOPS SNAPPED OFF IN SHELTER BELTS AND ALONG THE NORTH BRANCH
Aug 26, 7:45 PM CDTTORNADO2 N Nash, ND911 CALL. NUMEROUS OTHER REPORTS OF FUNNELS IN THE SAME AREA.
Aug 26, 8:10 PM CDTHAIL 17 N Grafton, 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
Aug 26, 5:10 PM CDTTornado WatchSPC8 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.3 hours before the alert went out and 294 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 2007-08-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1997 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 2007-08-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.193958Sfc1 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
1997 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
2248 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.9

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KFGF 270017
TORFGF
NDC067-099-270115-
/O.NEW.KFGF.TO.W.0035.070827T0017Z-070827T0115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
717 PM CDT SUN AUG 26 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME SOUTHEASTERN PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA...
  NORTH CENTRAL WALSH COUNTY IN NORTHEAST NORTH DAKOTA...
  THIS INCLUDES THE CITY OF GRAFTON...

* UNTIL 815 PM CDT

* AT 715 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 3 MILES EAST OF
  EDINBURG...OR 19 MILES WEST OF GRAFTON...MOVING TO THE EAST AT 30
  MPH.

* THE TORNADO WILL BE NEAR...
  HOOPLE AT 725 PM CDT...
  NASH AT 730 PM CDT...
  GRAFTON AT 740 PM CDT...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4854 9791 4841 9803 4834 9731 4854 9730

$$
JK/DK
3 follow-up statements
000 
WWUS53 KFGF 270035
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
734 PM CDT SUN AUG 26 2007

NDC067-099-270115-
/O.CON.KFGF.TO.W.0035.000000T0000Z-070827T0115Z/
PEMBINA ND-WALSH ND-
734 PM CDT SUN AUG 26 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR EXTREME
SOUTHEASTERN PEMBINA AND NORTH CENTRAL WALSH COUNTIES...

AT 734 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE TORNADO WAS LOCATED
3 MILES SOUTH OF HOOPLE...OR 12 MILES NORTHWEST OF GRAFTON...MOVING
TO THE EAST AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  NASH BY 740 PM CDT...
  5 MILES NORTH OF GRAFTON BY 750 PM CDT...

THIS STORM ALSO PRODUCED GOLF BALL SIZE HAIL IN HOOPLE AT 730 PM CDT.

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4854 9791 4841 9803 4834 9731 4854 9730

$$

DK/CS
000 
WWUS53 KFGF 270057
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
757 PM CDT SUN AUG 26 2007

NDC067-099-270115-
/O.CON.KFGF.TO.W.0035.000000T0000Z-070827T0115Z/
PEMBINA ND-WALSH ND-
757 PM CDT SUN AUG 26 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 815 PM CDT FOR EXTREME
SOUTHEASTERN PEMBINA AND NORTHEASTERN WALSH COUNTIES...

AT 757 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE TORNADO WAS LOCATED 
NEAR NASH...OR 9 MILES NORTHWEST OF GRAFTON...MOVING TO THE EAST AT 
35 MPH. THIS STORM PRODUCED A CONFIRMED TORNADO 2 MILES NORTH OF 
NASH AT 745 PM CDT. 

* THE TORNADO WILL BE NEAR...
  GRAFTON BY 805 PM CDT...
  OAKWOOD BY 810 PM CDT...
  HERRICK BY 815 PM CDT...

IF YOU ARE IN THE PATH OF THIS TORNADO ABANDON CARS AND MOBILE HOMES
FOR A STURDY BUILDING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4855 9778 4840 9773 4834 9719 4855 9717

$$

DK/CS
000 
WWUS53 KFGF 270115
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
815 PM CDT SUN AUG 26 2007

NDC067-099-270125-
/O.EXP.KFGF.TO.W.0035.000000T0000Z-070827T0115Z/
PEMBINA ND-WALSH ND-
815 PM CDT SUN AUG 26 2007

...THE TORNADO WARNING FOR EXTREME SOUTHEASTERN PEMBINA AND
NORTHEASTERN WALSH COUNTIES EXPIRED AT 815 PM CDT...

DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SEVERE AND SO THE
WARNING WAS ALLOWED TO EXPIRE AT 815 PM CDT. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT SUNDAY EVENING
FOR NORTHWESTERN MINNESOTA.

LAT...LON 4855 9778 4840 9773 4834 9719 4855 9717

$$

DK/CS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 26, 7:25 PM CDTSevere Thunderstorm WarningFGFNelson65 min
Aug 26, 7:50 PM CDTTornado WarningFGFGrand Forks, Nelson55 min
Aug 26, 8:41 PM CDTTornado WarningFGFGrand Forks64 min
Aug 26, 9:39 PM CDTSevere Thunderstorm WarningFGFTraill66 min
Aug 26, 9:44 PM CDTSevere Thunderstorm WarningFGFGrand Forks61 min
Aug 26, 9:51 PM CDTTornado WarningFGFGrand Forks54 min
Aug 26, 10:17 PM CDTTornado WarningFGFSteele39 min
Aug 26, 10:42 PM CDTSevere Thunderstorm WarningFGFTraill63 min
Aug 26, 10:44 PM CDTSevere Thunderstorm WarningFGFGrand Forks61 min
Aug 27, 3:05 PM CDTSevere Thunderstorm WarningFGFBarnes55 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; radar from the NEXRAD Level II archive.