Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 3, NWS Bismarck, ND

May 6, 2007Grant County, Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at May 6, 2007, 12:46 PM MDT for Grant County, Morton County, North Dakota. It was in force for 29 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
May 6, 2007, 12:46 PM MDT (18:46 UTC)
Expired
May 6, 2007, 1:15 PM MDT
In force
29 min
Issued by
NWS Bismarck, ND
Area
Counties, with a storm outline in the text

Counties Grant County, ND, Morton County, ND

The radar

The Bismarck radar (KBIS), 56 km from the middle of the area, began a volume at 18:46 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.

The watch it was issued in

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

IssuedProductOfficeLasted
May 6, 12:07 PM MDTTornado WatchSPC6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 6.8 hours before the alert went out and 60 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 2007-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 659 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 2007-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 288 square meters per square second.1939587897117136Sfc1 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
659 J/kg
Mixed-layer CIN
-84 J/kg
Mixed-layer LCL
562 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
288 m²/s²
0-3 km storm-relative helicity
292 m²/s²
Significant tornado parameter
0.7
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KBIS 061846
TORBIS
NDC037-059-061915-
/O.NEW.KBIS.TO.W.0003.070506T1846Z-070506T1915Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
146 PM CDT SUN MAY 6 2007

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL GRANT COUNTY IN SOUTH CENTRAL NORTH DAKOTA...
  SOUTH CENTRAL MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 215 PM CDT(115 PM MDT)

* AT 1237 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ST.
  GERTRUDE...OR ABOUT 45 MILES SOUTHWEST OF BISMARCK...MOVING
  NORTHEAST AT 40 MPH.

* THE TORNADO WILL BE NEAR...
  FLASHER AROUND 155 PM CDT...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING(600
PM MDT SUNDAY EVENING) FOR EASTERN NORTH DAKOTA.

LAT...LON 4635 10149 4625 10128 4649 10094 4664 10123

$$

RSL
2 follow-up statements
000 
WWUS53 KBIS 061905
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
205 PM CDT SUN MAY 6 2007

NDC037-059-061915-
/O.CON.KBIS.TO.W.0003.000000T0000Z-070506T1915Z/
GRANT ND-MORTON ND-
205 PM CDT SUN MAY 6 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 PM CDT(115 PM MDT)
FOR SOUTH CENTRAL MORTON AND EAST CENTRAL GRANT COUNTIES...

AT 158 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A TORNADO.  THIS POSSIBLE TORNADO WAS LOCATED NEAR 
FLASHER...OR ABOUT 35 MILES SOUTHWEST OF BISMARCK...MOVING NORTHEAST 
AT 35 MPH.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING(600
PM MDT SUNDAY EVENING) FOR EASTERN NORTH DAKOTA.

LAT...LON 4635 10149 4625 10128 4649 10094 4664 10123

$$

RSL
000 
WWUS53 KBIS 061914
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
214 PM CDT SUN MAY 6 2007

NDC037-059-061924-
/O.EXP.KBIS.TO.W.0003.000000T0000Z-070506T1915Z/
GRANT ND-MORTON ND-
214 PM CDT SUN MAY 6 2007

...THE TORNADO WARNING FOR SOUTH CENTRAL MORTON AND EAST CENTRAL
GRANT COUNTIES EXPIRES AT 215 PM CDT(115 PM MDT)...

THE TORNADIC THUNDERSTORM HAS WEAKENED AND NO LONGER POSES A
SIGNIFICANT THREAT.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 PM CDT SUNDAY EVENING(600
PM MDT SUNDAY EVENING) FOR EASTERN NORTH DAKOTA.

LAT...LON 4635 10149 4625 10128 4649 10094 4664 10123

$$

RSL

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 7:35 PM MDTFlash Flood WarningBISDickey, LaMoure6 hr
May 6, 1:21 AM MDTFlash Flood WarningBISDickey, LaMoure4 hr
May 6, 11:58 AM MDTSevere Thunderstorm WarningBISGrant, Sioux62 min
May 6, 12:15 PM MDTTornado WarningBISGrant30 min
May 6, 3:38 PM MDTSevere Thunderstorm WarningBISPierce21 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.