Alert archive / North Dakota / Tornado Warnings in 2004

Tornado Warning 25, NWS Bismarck, ND

July 20, 2004Logan County, McIntosh County, North Dakota

NWS Bismarck, ND issued this tornado warning at Jul 20, 2004, 8:21 PM CDT for Logan County, McIntosh County, North Dakota. It was in force for 24 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, 2004, 8:21 PM CDT (01:21 UTC)
Expired: Jul 20, 2004, 8:45 PM CDT
In force: 24 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

Counties Logan County, ND, McIntosh County, ND

The radar

The Bismarck radar (KBIS), 104 km from the middle of the area, began a volume at 01:22 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
Jul 20, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.4 hours before the alert went out and 100 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: 991 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 2298 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 88 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WFUS53 KBIS 210121
TORBIS
NDC047-051-210145-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
821 PM CDT TUE JUL 20 2004

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* TORNADO WARNING FOR...
  SOUTHERN LOGAN COUNTY IN SOUTHEAST NORTH DAKOTA
  NORTHERN MCINTOSH COUNTY IN SOUTHEAST NORTH DAKOTA

* UNTIL 845 PM CDT

* AT 821 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
A   TORNADO 3 MILES NORTH OF WISHEK...OR ABOUT 61 MILES SOUTHWEST OF 
JAMESTOWN...MOVING EAST SOUTHEAST AT 20 MPH.

* THE TORNADO WILL BE NEAR...
  LEHR AROUND 840 PM CDT


LAT...LON 4636 9986 4615 9987 4616 9924 4636 9921

$$
SHULZ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 20, 7:07 PM CDT	Severe Thunderstorm Warning	BIS	Ward	53 min
Jul 20, 7:56 PM CDT	Severe Thunderstorm Warning	BIS	Stutsman	64 min
Jul 20, 7:58 PM CDT	Severe Thunderstorm Warning	BIS	Ward	62 min
Jul 20, 8:15 PM CDT	Severe Thunderstorm Warning	BIS	Logan, McIntosh	60 min
Jul 20, 9:18 PM CDT	Severe Thunderstorm Warning	BIS	McIntosh	57 min

Nearby

Tornado Warnings in North Dakota, 2004 Every tornado warning in 2004 Tornadoes in 2004

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.