Alert archive / North Dakota / Tornado Warnings in 2007

Tornado Warning 7, NWS Bismarck, ND

May 21, 2007Morton County, North Dakota

NWS Bismarck, ND issued this tornado warning at May 21, 2007, 7:29 PM CDT for Morton County, North Dakota. It was in force for 31 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 21, 2007, 7:29 PM CDT (00:29 UTC)
Expired
May 21, 2007, 8:00 PM CDT
In force
31 min
Issued by
NWS Bismarck, ND
Area
Counties, with a storm outline in the text

County Morton County, ND

The radar

The Bismarck radar (KBIS), 62 km from the middle of the area, began a volume at 00:29 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 21, 2:11 PM CDTSevere Thunderstorm WatchSPC9 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.5 hours before the alert went out and 67 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 2007-05-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1843 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 2007-05-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.19395878Sfc1 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
1843 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
1774 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.2

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KBIS 220030
TORBIS
NDC059-220100-
/O.NEW.KBIS.TO.W.0007.070522T0029Z-070522T0100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
729 PM CDT MON MAY 21 2007

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

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

* UNTIL 800 PM CDT

* AT 729 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO OVER NORTH
  CENTRAL MORTON COUNTY...OR ABOUT 36 MILES WEST OF BISMARCK...MOVING
  NORTHEAST AT 20 MPH. THIS STORM HAS A HISTORY OF PRODUCING TORNADOES.

* THE TORNADO WILL BE NEAR...
  RURAL NORTH CENTRAL MORTON COUNTY THROUGH 800 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.

LAT...LON 4692 10168 4683 10146 4698 10128 4699 10164

$$

CS/HW
2 follow-up statements
000 
WWUS53 KBIS 220042 RRA
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
742 PM CDT MON MAY 21 2007

NDC059-220100-
/O.CON.KBIS.TO.W.0007.000000T0000Z-070522T0100Z/
MORTON ND-
742 PM CDT MON MAY 21 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 800 PM CDT FOR FAR NORTH
CENTRAL MORTON COUNTY...

AT 742 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED OVER FAR NORTH CENTRAL
MORTON COUNTY...OR ABOUT 29 MILES WEST OF BISMARCK...MOVING NORTHEAST
AT 20 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.

LAT...LON 4692 10168 4683 10146 4698 10128 4699 10164

$$

CS/HW
000 
WWUS53 KBIS 220102
SVSBIS

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BISMARCK ND
801 PM CDT MON MAY 21 2007

NDC059-220111-
/O.EXP.KBIS.TO.W.0007.000000T0000Z-070522T0100Z/
MORTON ND-
801 PM CDT MON MAY 21 2007

...THE TORNADO WARNING FOR FAR NORTH CENTRAL MORTON COUNTY 
EXPIRED AT 80PM CDT...

THE STORM IS NO LONGER PRODUCING A TORNADO. HOWEVER...A SEVERE 
THUNDERSTORM WARNING IS IN EFFECT UNTIL 9 PM CDT.

LAT...LON 4692 10168 4683 10146 4698 10128 4699 10164

$$

CS/HW

The office that day

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

IssuedProductOfficeCountiesLasted
May 21, 7:00 PM CDTSevere Thunderstorm WarningBISSheridan60 min
May 21, 7:05 PM CDTTornado WarningBISMorton25 min
May 21, 7:12 PM CDTSevere Thunderstorm WarningBISMcHenry47 min
May 21, 7:14 PM CDTSevere Thunderstorm WarningBISMercer, Oliver61 min
May 21, 7:17 PM CDTSevere Thunderstorm WarningBISRenville28 min
May 21, 7:22 PM CDTTornado WarningBISOliver38 min
May 21, 7:35 PM CDTSevere Thunderstorm WarningBISWard55 min
May 21, 7:47 PM CDTSevere Thunderstorm WarningBISPierce, Rolette58 min
May 21, 7:50 PM CDTSevere Thunderstorm WarningBISBottineau25 min
May 21, 7:53 PM CDTSevere Thunderstorm WarningBISMcLean67 min
May 21, 8:00 PM CDTSevere Thunderstorm WarningBISMorton, Oliver60 min
May 21, 8:08 PM CDTSevere Thunderstorm WarningBISPierce, Rolette67 min
May 21, 8:17 PM CDTSevere Thunderstorm WarningBISMercer25 min
May 21, 8:25 PM CDTSevere Thunderstorm WarningBISWard38 min
May 21, 8:58 PM CDTSevere Thunderstorm WarningBISBurleigh, McLean, Morton, Oliver, Sheridan62 min
May 21, 10:00 PM CDTSevere Thunderstorm WarningBISBurleigh50 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.