Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 8, NWS Bismarck, ND

May 25, 2007Sioux County, North Dakota

NWS Bismarck, ND issued this tornado warning at May 25, 2007, 3:33 PM CDT for Sioux County, North Dakota. It was in force for 27 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 25, 2007, 3:33 PM CDT (20:33 UTC)
Expired: May 25, 2007, 4:00 PM CDT
In force: 27 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

County Sioux County, ND

The radar

The Bismarck radar (KBIS), 82 km from the middle of the area, began a volume at 20:33 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.

Issued	Product	Office	Lasted
May 25, 2:05 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 8.6 hours before the alert went out and 84 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1317 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 248 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 KBIS 252034
TORBIS
NDC085-252100-
/O.NEW.KBIS.TO.W.0008.070525T2033Z-070525T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
333 PM CDT FRI MAY 25 2007

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN SIOUX COUNTY IN SOUTH CENTRAL NORTH DAKOTA...

* UNTIL 400 PM CDT

* AT 329 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER SOUTH
  CENTRAL SIOUX COUNTY...OR ABOUT 58 MILES SOUTH OF BISMARCK...MOVING
  NORTHEAST AT 15 MPH.

* THE TORNADO WILL REMAIN OVER...
  RURAL CENTRAL SIOUX COUNTY ABOUT 7 MILES WEST OF SELFRIDGE...

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.

LAT...LON 4599 10129 4594 10115 4614 10076 4628 10103

$$

HW/CS

1 follow-up statement

000 
WWUS53 KBIS 252047
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
345 PM CDT FRI MAY 25 2007

NDC085-252100-
/O.CON.KBIS.TO.W.0008.000000T0000Z-070525T2100Z/
SIOUX ND-
345 PM CDT FRI MAY 25 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 400 PM CDT FOR EASTERN
SIOUX COUNTY...

AT 342 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED OVER SOUTH CENTRAL
SIOUX COUNTY 7 MILES WEST OF SELFRIDGE...OR ABOUT 57 MILES SOUTH
OF BISMARCK...MOVING NORTHEAST AT 10 MPH.

THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE
INDICATED COUNTY.

THIS STORM IS CAPABLE OF PRODUCING LARGE HAIL AS WELL. 

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.

LAT...LON 4599 10129 4594 10115 4614 10076 4628 10103

$$

HW/CS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 3:01 PM CDT	Severe Thunderstorm Warning	BIS	Sioux	59 min
May 25, 3:58 PM CDT	Tornado Warning	BIS	Sioux	32 min
May 25, 4:03 PM CDT	Severe Thunderstorm Warning	BIS	Grant	57 min
May 25, 4:08 PM CDT	Severe Thunderstorm Warning	BIS	Adams	52 min
May 25, 4:30 PM CDT	Tornado Warning	BIS	Sioux	30 min
May 25, 5:01 PM CDT	Severe Thunderstorm Warning	BIS	Grant, Sioux	48 min
May 25, 5:20 PM CDT	Severe Thunderstorm Warning	BIS	Burleigh, Morton	38 min
May 25, 5:22 PM CDT	Tornado Warning	BIS	Sioux	23 min

Nearby

Tornado Warnings in North Dakota, 2007 Every tornado warning in 2007 Tornadoes 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.