Alert archive / North Dakota / Tornado Warnings in 2006

Tornado Warning 39, NWS Grand Forks, ND

August 12, 2006Cavalier County, Pembina County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Aug 12, 2006, 3:06 PM CDT for Cavalier County, Pembina County, North Dakota. It was in force for 54 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
Aug 12, 2006, 3:06 PM CDT (20:06 UTC)
Expired
Aug 12, 2006, 4:00 PM CDT
In force
54 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

Counties Cavalier County, ND, Pembina County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 135 km from the middle of the area, began a volume at 20:10 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 12, 3:15 PM CDTTSTM WND GST 601 E Nekoma, 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 12, 2:56 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 8.1 hours before the alert went out and 354 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, International Fa, MN at 12:00Z on 2006-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, International Fa, MN at 12:00Z on 2006-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 66 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
3 J/kg
Mixed-layer CIN
-325 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
66 m²/s²
0-3 km storm-relative helicity
100 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 
WFUS53 KFGF 122006
TORFGF
NDC019-067-122100-
/O.NEW.KFGF.TO.W.0039.060812T2006Z-060812T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
306 PM CDT SAT AUG 12 2006

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHEASTERN CAVALIER COUNTY IN NORTHEAST NORTH DAKOTA
  SOUTHWESTERN PEMBINA COUNTY IN NORTHEAST NORTH DAKOTA

* UNTIL 400 PM CDT

* AT 301 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
  THUNDERSTORM WITH STRONG ROTATION 3 MILES EAST OF NEKOMA...OR 13
  MILES SOUTH OF LANGDON...MOVING TO THE EAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  MILTON AT 335 PM CDT
  GARDAR AT 355 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 1000 PM CDT SATURDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4864 9835 4856 9836 4856 9774 4871 9776

$$

JCA/WJB
2 follow-up statements
000 
WWUS53 KFGF 122034
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
334 PM CDT SAT AUG 12 2006

NDC019-122044-
/O.CAN.KFGF.TO.W.0039.000000T0000Z-060812T2100Z/
CAVALIER ND-
334 PM CDT SAT AUG 12 2006

...THE TORNADO WARNING FOR CAVALIER COUNTY IS CANCELLED...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4866 9790 4856 9791 4856 9764 4867 9766

$$

NDC067-122100-
/O.CON.KFGF.TO.W.0039.000000T0000Z-060812T2100Z/
PEMBINA ND-
334 PM CDT SAT AUG 12 2006

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR
SOUTHWESTERN PEMBINA COUNTY...

AT 331 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM WITH STRONG ROTATION. THE TORNADO WAS LOCATED NEAR
UNION...OR 24 MILES SOUTHEAST OF LANGDON...MOVING TO THE EAST AT 20
MPH.

* THE TORNADO WILL BE NEAR...
  GARDAR BY 340 PM CDT
  CRYSTAL BY 400 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 1000 PM CDT SATURDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4866 9790 4856 9791 4856 9764 4867 9766

$$

JCA/WJB
000 
WWUS53 KFGF 122053
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
353 PM CDT SAT AUG 12 2006

NDC067-122103-
/O.EXP.KFGF.TO.W.0039.000000T0000Z-060812T2100Z/
PEMBINA ND-
353 PM CDT SAT AUG 12 2006

...THE TORNADO WARNING FOR SOUTHWESTERN PEMBINA COUNTY WILL EXPIRE AT
400 PM CDT...

DOPPLER RADAR INDICATED THE STORM WAS NO LONGER SEVERE AND SO THE
WARNING WILL BE ALLOWED TO EXPIRE AT 400 PM CDT. 

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT SATURDAY EVENING
FOR NORTHWESTERN MINNESOTA AND EASTERN NORTH DAKOTA.

LAT...LON 4866 9790 4856 9791 4856 9764 4867 9766

$$

JCA/WJB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 1:51 AM CDTSevere Thunderstorm WarningFGFCavalier54 min
Aug 12, 1:36 PM CDTSevere Thunderstorm WarningFGFBenson54 min
Aug 12, 2:18 PM CDTSevere Thunderstorm WarningFGFRamsey57 min
Aug 12, 2:33 PM CDTSevere Thunderstorm WarningFGFCavalier57 min
Aug 12, 2:57 PM CDTSevere Thunderstorm WarningFGFWalsh63 min
Aug 12, 3:13 PM CDTSevere Thunderstorm WarningFGFRamsey47 min
Aug 12, 3:26 PM CDTSevere Thunderstorm WarningFGFRichland, Sargent64 min
Aug 12, 3:30 PM CDTTornado WarningFGFRamsey30 min
Aug 12, 3:57 PM CDTTornado WarningFGFNelson17 min
Aug 12, 4:00 PM CDTSevere Thunderstorm WarningFGFWalsh60 min
Aug 12, 4:15 PM CDTSevere Thunderstorm WarningFGFNelson41 min
Aug 12, 4:29 PM CDTSevere Thunderstorm WarningFGFGrand Forks34 min

Nearby

Tornado Warnings in North Dakota, 2006Every tornado warning in 2006Tornadoes in 2006

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.