Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 8, NWS Grand Forks, ND

May 30, 2007Cass County, North Dakota

NWS Grand Forks, ND issued this tornado warning at May 30, 2007, 5:38 PM CDT for Cass County, North Dakota. It was in force for 38 min. 6 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
May 30, 2007, 5:38 PM CDT (22:38 UTC)
Expired
May 30, 2007, 6:16 PM CDT
In force
38 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 49 km from the middle of the area, began a volume at 22:40 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
May 30, 5:50 PM CDTTORNADO 11 S Page, NDSKYWARN SPOTTER REPORTED TWO FUNNELS NEAR PAGE. ONE TOUCHED DOWN JUST SOUTH OF PAGE...LIFTED BRIEFLY WHILE OVER PAGE THEN TOUCHED DOWN REPEATEDLY AS IT TRAVELED NORTHWEST FROM PAGE. TORNADO TRACKED FOR AROUND 5 MILES TO THE NORTHWEST UNTIL ABOUT 6 PM...LIFTING
May 30, 5:50 PM CDTTORNADO3 Nw Page, NDSPOTTER REPORTED TWO FUNNELS NEAR PAGE THAT TOUCHED THE GROUND PICKING DEBRIS OFF THE GROUND AND THEN LIFTING.
May 30, 5:50 PM CDTTORNADOPage, NDTORNADO CAUSED DAMAGE TO AN AUGER AND MOVED A TRAILER A FEW FEET ON THE WEST SIDE OF PAGE. TIME ESTIMATED.
May 30, 5:55 PM CDTTSTM WND GST 603 N Page, NDSTRONG REAR FLANK DOWNDRAFT WINDS MOVED THROUGH THE COMMUNITY OF PAGE SEVERAL MINUTES AFTER A TORNADO HAD BRUSHED THE WEST END OF TOWN.
May 30, 5:55 PM CDTTSTM WND GST 60Page, NDSTRONG REAR FLANK DOWNDRAFT WINDS MOVED THROUGH THE COMMUNITY OF PAGE SEVERAL MINUTES AFTER A TORNADO HAD BRUSHED THE WEST END OF TOWN.
May 30, 6:00 PM CDTTORNADO3 N Page, NDREPORT OF TORNADO SKIPPING ALONG THE GROUND 3 MILES NORTH OF PAGE...SPOTTER WAS LOOKING WEST.

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

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 10.6 hours before the alert went out and 242 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 12:00Z on 2007-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 19 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 12:00Z on 2007-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 9 square meters per square second.1939587897Sfc1 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
19 J/kg
Mixed-layer CIN
-103 J/kg
Mixed-layer LCL
909 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
9 m²/s²
0-3 km storm-relative helicity
51 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 302238
TORFGF
NDC017-302345-
/O.NEW.KFGF.TO.W.0008.070530T2238Z-070530T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
538 PM CDT WED MAY 30 2007

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHWESTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 645 PM CDT

* AT 535 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 4 MILES NORTH OF
  AYR...OR 27 MILES NORTHEAST OF VALLEY CITY...MOVING TO THE
  NORTHWEST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  PAGE AT 550 PM CDT...

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

LAT...LON 4705 9753 4713 9745 4724 9757 4713 9770

$$

PJS/DR
3 follow-up statements
000 
WWUS53 KFGF 302258
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
557 PM CDT WED MAY 30 2007

NDC017-302345-
/O.CON.KFGF.TO.W.0008.000000T0000Z-070530T2345Z/
CASS ND-
557 PM CDT WED MAY 30 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR EXTREME
NORTHWESTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

AT 552 PM CDT...A MEMBER OF PAGE AMBULANCE SERVICE REPORTED A TORNADO
2 MILES WEST AND ONE MILE NORTH OF PAGE. THE TORNADO WAS LOCATED 3 
MILES SOUTH OF COLGATE...OR 26 MILES NORTHEAST OF VALLEY 
CITY...MOVING TO THE NORTHWEST AT 30 MPH.

DO NOT OUTRUN A TORNADO IN YOUR CAR. LEAVE YOUR CAR AND GO TO A
STRONG BUILDING OR SEEK SHELTER IN A DITCH OR LOW SPOT.

LAT...LON 4716 9766 4721 9758 4725 9766 4721 9771

$$

PJS
000 
WWUS53 KFGF 302312
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
611 PM CDT WED MAY 30 2007

NDC017-302345-
/O.CON.KFGF.TO.W.0008.000000T0000Z-070530T2345Z/
CASS ND-
611 PM CDT WED MAY 30 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR EXTREME
NORTHWESTERN CASS COUNTY IN SOUTHEAST NORTH DAKOTA...

AT 600 PM CDT...THE PUBLIC REPORTED A TORNADO. THE TORNADO WAS 
LOCATED 3 MILES NORTH AND 2 MILES WEST OF PAGE.  THE PUBLIC WAS 
VIEWING THE TORNADO SKIPPING ALONG THE GROUND TOUCHING DOWN BRIEFLY 
AND THEN LIFTING BACK UP.  TORNADO WAS MOVING TO THE NORTHWEST AT 20 
MPH.

DO NOT OUTRUN A TORNADO IN YOUR CAR. LEAVE YOUR CAR AND GO TO A
STRONG BUILDING OR SEEK SHELTER IN A DITCH OR LOW SPOT.

LAT...LON 4716 9766 4721 9758 4725 9766 4721 9771

$$

DTR
000 
WWUS53 KFGF 302316
SVSFGF

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
616 PM CDT WED MAY 30 2007

NDC017-302326-
/O.CAN.KFGF.TO.W.0008.000000T0000Z-070530T2345Z/
CASS ND-
616 PM CDT WED MAY 30 2007

...THE TORNADO WARNING FOR NORTHWESTERN CASS COUNTY IN 
SOUTHEAST NORTH DAKOTA IS CANCELLED...

AT 616 PM CDT...THE TORNADO HAS DISSIPATED IN EXTREME NORTHWESTERN
CASS COUNTY. SO THE WARNING HAS BEEN CANCELLED.

LAT...LON 4716 9766 4721 9758 4725 9766 4721 9771

$$

PJS

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.