Alert archive / Colorado / Tornado Watches in 2004
Tornado Watch 734
The Storm Prediction Center issued this tornado watch at Aug 10, 2004, 8:35 PM MDT for 9 counties in Colorado. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2004, 8:35 PM MDT (02:35 UTC)
- Expired
- Aug 11, 2004, 1:00 AM MDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
Counties Baca County, CO, Bent County, CO, Crowley County, CO, Huerfano County, CO, Kiowa County, CO, Las Animas County, CO, Otero County, CO, Prowers County, CO, Pueblo County, CO
The radar
The Pueblo radar (KPUX), 94 km from the middle of the area, began a volume at 02:35 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 9:03 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Prowers | 87 min |
| Aug 10, 9:30 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 60 min |
| Aug 10, 9:39 PM MDT | Severe Thunderstorm Warning | PUB | Custer, Pueblo | 66 min |
| Aug 10, 10:07 PM MDT | Severe Thunderstorm Warning | PUB | Baca | 83 min |
| Aug 10, 10:26 PM MDT | Tornado Warning | PUB | Baca, Prowers | 34 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
Denver, CO (KDNR), launched 00:00Z, 2.6 hours before the alert went out and 254 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
- 694 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 2242 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 249 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.1
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 110236
SEL4
SPC WW 110235
COZ000-110700-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 734
NWS STORM PREDICTION CENTER NORMAN OK
835 PM MDT TUE AUG 10 2004
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTHEASTERN COLORADO
EFFECTIVE THIS TUESDAY NIGHT AND WEDNESDAY MORNING FROM 835 PM
UNTIL 100 AM MDT.
TORNADOES...HAIL TO 3 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 80 STATUTE MILES EAST AND WEST
OF A LINE FROM 35 MILES NORTH OF LA JUNTA COLORADO TO 40 MILES
EAST SOUTHEAST OF TRINIDAD COLORADO.
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.
OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO
WATCH NUMBER 731. WATCH NUMBER 731 WILL NOT BE IN EFFECT AFTER 835
PM MDT. CONTINUE...WW 732...
DISCUSSION...MCS APPEARS TO BE EVOLVING OVER SERN CO ALONG
SHARPENING COLD FRONT. THIS ACTIVITY SHOULD PROPAGATE SEWD ACROSS
THE REMAINDER OF CO OVER THE NEXT FOUR HOURS.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 3 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 33025.
...DARROW
383,1020 370,1021 370,1050 383,1050SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 6:46 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Broomfield, Crowley, Denver, Douglas and 6 more | 59 min |
| Aug 11, 12:11 PM MDT | Mesoscale Discussion | SPC | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Crowley and 14 more | 94 min |
| Aug 11, 1:20 PM MDT | Severe Thunderstorm Watch | SPC | Adams, Arapahoe, Boulder, Broomfield, Crowley, Denver and 13 more | 7 hr |
| Aug 11, 5:27 PM MDT | Mesoscale Discussion | SPC | Crowley, Denver, Douglas, Elbert, El Paso, Huerfano and 6 more | 2 hr |
Nearby
Tornado Watches in Colorado, 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.