Alert archive / Colorado / Tornado Warnings in 2004
Tornado Warning 42, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this tornado warning at Aug 9, 2004, 6:13 PM MDT for Elbert County, Colorado. It was in force for 47 min. 38 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 9, 2004, 6:13 PM MDT (00:13 UTC)
- Expired
- Aug 9, 2004, 7:00 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Counties, with a storm outline in the text
County Elbert County, CO
The radar
The Denver radar (KFTG), 54 km from the middle of the area, began a volume at 00:16 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:15 PM MDT | HAIL 2.75 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:16 PM MDT | HAIL 4.25 | 5 W Agate, CO | |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
| Aug 9, 6:45 PM MDT | TORNADO | 10 N Simla, CO | 4 MULTI VORTEX TORNADOS ON GROUND |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 9, 12:30 PM MDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 0.2 hours before the alert went out and 95 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
- 2151 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 1371 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 245 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 10.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS55 KBOU 100013
TORBOU
COC039-100100-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
610 PM MDT MON AUG 9 2004
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* TORNADO WARNING FOR...
NORTHERN ELBERT COUNTY IN EAST CENTRAL COLORADO
* UNTIL 700 PM MDT
* AT 610 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM WITH A POSSIBLE TORNADO 14 MILES SOUTHWEST OF AGATE...
OR ABOUT 27 MILES WEST OF LIMON...MOVING SOUTHEAST AT 5 MPH.
LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...AGATE.
A BOUNDARY LIES WEST TO EAST ACROSS NORTHERN ELBERT COUNTY. ANY
STORMS DEVELOPING ALONG THE BOUNDARY MAY PRODUCE ADDITIONAL
TORNADOES. THE BOUNDARY IS SLOWLY SLIDING SOUTH THROUGH CENTRAL
AND EAST ELBERT COUNTY.
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 ALWAYS 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 3950 10444 3935 10442 3927 10415 3926 10374
3953 10374
$$
RTGThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:00 PM MDT | Tornado Warning | BOU | Washington | 45 min |
| Aug 9, 6:31 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe | 59 min |
| Aug 9, 6:46 PM MDT | Tornado Warning | BOU | Lincoln, Washington | 44 min |
| Aug 9, 6:52 PM MDT | Tornado Warning | BOU | Elbert | 38 min |
| Aug 9, 7:09 PM MDT | Tornado Warning | BOU | Washington | 36 min |
| Aug 9, 7:26 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 64 min |
| Aug 9, 8:31 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 29 min |
| Aug 9, 8:50 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 40 min |
| Aug 9, 9:00 PM MDT | Tornado Warning | BOU | Lincoln | 45 min |
| Aug 10, 2:48 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 57 min |
| Aug 10, 3:04 PM MDT | Tornado Warning | BOU | Larimer, Weld | 41 min |
| Aug 10, 3:44 PM MDT | Tornado Warning | BOU | Weld | 46 min |
| Aug 10, 4:31 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 49 min |
| Aug 10, 4:49 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 41 min |
| Aug 10, 5:06 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver | 39 min |
| Aug 10, 5:16 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver | 44 min |
| Aug 10, 5:32 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Broomfield, Denver | 43 min |
| Aug 10, 5:39 PM MDT | Severe Thunderstorm Warning | BOU | Boulder | 36 min |
| Aug 10, 5:45 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
Nearby
Tornado Warnings in Colorado, 2004Every tornado warning in 2004Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.