Alert archive / North Dakota / Tornado Warnings in 2003

Tornado Warning 15, NWS Bismarck, ND

July 20, 2003LaMoure County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 20, 2003, 2:26 AM CDT for LaMoure County, North Dakota. It was in force for 34 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: Jul 20, 2003, 2:26 AM CDT (07:26 UTC)
Expired: Jul 20, 2003, 3:00 AM CDT
In force: 34 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

County LaMoure County, ND

The radar

The Aberdeen radar (KABR), 108 km from the middle of the area, began a volume at 07:27 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 nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 7.4 hours before the alert went out and 170 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: 2126 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 2042 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 35 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KBIS 200726
TORBIS
NDC045-200800-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
225 AM CDT SUN JUL 20 2003

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  LAMOURE COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 300 AM CDT

* AT 225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  POSSIBLE TORNADO NEAR GRAND RAPIDS...OR ABOUT 39 MILES SOUTHEAST OF
  JAMESTOWN.  THE STORM WAS MOVING SOUTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  LA MOURE AT 235 AM CDT

* OTHER LOCATIONS IN THE WARNING INCLUDE BERLIN

LAT...LON 4653 9838 4640 9856 4628 9837 4640 9814

$$
RSL

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 1:41 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure, Stutsman	49 min
Jul 20, 2:31 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	59 min
Jul 20, 2:50 AM CDT	Tornado Warning	BIS	Dickey	25 min
Jul 20, 3:18 AM CDT	Severe Thunderstorm Warning	BIS	LaMoure	42 min
Jul 20, 3:31 AM CDT	Severe Thunderstorm Warning	BIS	Stutsman	59 min

Nearby

Tornado Warnings in North Dakota, 2003 Every tornado warning in 2003 Tornadoes in 2003

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.