Alert archive / North Dakota / Tornado Watches in 2004
Tornado Watch 775
The Storm Prediction Center issued this tornado watch at Aug 23, 2004, 2:25 PM MDT for 21 counties in North Dakota; 9 counties in South Dakota. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 23, 2004, 2:25 PM MDT (20:25 UTC)
- Expired
- Aug 23, 2004, 8:00 PM MDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 30 counties
Adams County, ND, Billings County, ND, Burleigh County, ND, Dunn County, ND, Emmons County, ND, Golden Valley County, ND, Grant County, ND, Hettinger County, ND, McHenry County, ND, McKenzie County, ND, McLean County, ND, Mercer County, ND, Morton County, ND, Mountrail County, ND, Oliver County, ND, Sheridan County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Ward County, ND, Williams County, ND, Campbell County, SD, Corson County, SD, Dewey County, SD, Edmunds County, SD, Faulk County, SD, Perkins County, SD, Potter County, SD, Walworth County, SD, Ziebach County, SD
The radar
The Bismarck radar (KBIS), 79 km from the middle of the area, began a volume at 20:26 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.
Warnings issued inside it
9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 4:15 PM MDT | Severe Thunderstorm Warning | BIS | Adams | 60 min |
| Aug 23, 4:34 PM MDT | Severe Thunderstorm Warning | BIS | Hettinger | 56 min |
| Aug 23, 5:30 PM MDT | Severe Thunderstorm Warning | BIS | Grant, Morton | 60 min |
| Aug 23, 5:43 PM MDT | Tornado Warning | BIS | Grant | 32 min |
| Aug 23, 5:58 PM MDT | Tornado Warning | BIS | Morton | 32 min |
| Aug 23, 6:30 PM MDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 60 min |
| Aug 23, 6:57 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh, McLean, Morton | 63 min |
| Aug 23, 7:46 PM MDT | Severe Thunderstorm Warning | BIS | Burleigh, Kidder | 59 min |
| Aug 23, 7:56 PM MDT | Flash Flood Warning | BIS | Burleigh | 94 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 8.4 hours before the alert went out and 83 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 890 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 169 m²/s²
- 0-3 km storm-relative helicity
- 383 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 232022
SEL5
SPC WW 232025
MTZ000-NDZ000-SDZ000-240200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 775
NWS STORM PREDICTION CENTER NORMAN OK
225 PM MDT MON AUG 23 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHEAST MONTANA
WESTERN NORTH DAKOTA
NORTHWEST SOUTH DAKOTA
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 225 PM UNTIL 800
PM MDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 95 STATUTE MILES EAST AND WEST
OF A LINE FROM 50 MILES NORTHEAST OF WILLISTON NORTH DAKOTA TO 50
MILES SOUTH SOUTHWEST OF MOBRIDGE SOUTH DAKOTA.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
DISCUSSION...STRONG TROUGH AND SURFACE LOW MOVING NEWD ACROSS ERN MT
WITH RAPID RETURN OF LOW LEVEL MOISTURE/INSTABILITY WRN DAKOTAS.
SEVERE THUNDERSTORMS EXPECTED TO DEVELOP RAPIDLY AHEAD OF SYSTEM AS
COLD FRONT MOVES INTO WRN ND AND NW SD. SHEAR PROFILES FAVORABLE
FOR SUPERCELLS WHICH WILL ENHANCE SEVERE THREAT INCLUDING TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24040.
...HALES
484,1004 445,0985 445,1024 484,1045SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 12:59 PM MDT | Mesoscale Discussion | SPC | Billings, Bowman, Dunn, Golden Valley, McKenzie, Slope and 1 more | 2 hr |
| Aug 23, 1:22 PM MDT | Mesoscale Discussion | SPC | Adams, Burleigh, Emmons, Grant, Hettinger, Kidder and 9 more | 113 min |
| Aug 23, 5:02 PM MDT | Mesoscale Discussion | SPC | Adams, Billings, Burleigh, Dunn, Emmons, Golden Valley and 15 more | 88 min |
| Aug 22, 6:32 PM MDT | Mesoscale Discussion | SPC | Bennett, Jackson, Mellette, Oglala Lakota, Pennington | 118 min |
| Aug 23, 1:58 PM MDT | Mesoscale Discussion | SPC | Clay, Lincoln, McCook, Minnehaha, Turner, Union and 1 more | 2 hr |
| Aug 23, 4:05 PM MDT | Severe Thunderstorm Watch | SPC | Bennett, Brule, Buffalo, Gregory, Haakon, Hand and 10 more | 6 hr |
| Aug 23, 4:30 PM MDT | Mesoscale Discussion | SPC | Brookings, Clark, Codington, Day, Deuel, Grant and 6 more | 2 hr |
Nearby
Tornado Watches in North Dakota, 2004Tornado Watches in South Dakota, 2004Every tornado watch 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.