Alert archive / Colorado / Tornado Warnings in 2004

Tornado Warning 38, NWS Denver/Boulder, CO

July 29, 2004Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 29, 2004, 5:49 PM MDT for Washington County, Colorado. It was in force for 56 min. 2 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: Jul 29, 2004, 5:49 PM MDT (23:49 UTC)
Expired: Jul 29, 2004, 6:45 PM MDT
In force: 56 min
Issued by: NWS Denver/Boulder, CO
Area: Counties, with a storm outline in the text

County Washington County, CO

The radar

The Denver radar (KFTG), 103 km from the middle of the area, began a volume at 23:52 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
Jul 29, 5:58 PM MDT	HAIL 0.75	7 N Lindon, CO
Jul 29, 5:58 PM MDT	HAIL 0.75	7 N Lindon, CO

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
Jul 29, 1:55 PM MDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.8 hours before the alert went out and 10 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: 10 J/kg
Mixed-layer CIN: -327 J/kg
Mixed-layer LCL: 1334 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 84 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 292349
TORBOU
COC121-300045-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
546 PM MDT THU JUL 29 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 645 PM MDT

* AT 546 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 8 MILES SOUTHEAST OF
  WOODROW...OR ABOUT 21 MILES SOUTHWEST OF AKRON...MOVING EAST AT 10
  MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ANTON...
ELBA AND WOODROW.

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT WAS 
IN EFFECT FOR THIS SEVERE THUNDERSTORM UNTIL 542 PM MDT.  

HAIL UP TO 2 INCHES IN DIAMETER AND VERY HEAVY RAINFALL ARE ALSO 
LIKELY WITH THIS STORM.  
 
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 4000 10360 3987 10358 3966 10327 3977 10303
      4000 10298

$$
BAKER

The office that day

Everything else NWS Denver/Boulder, CO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 29, 3:39 PM MDT	Tornado Warning	BOU	Morgan, Washington	41 min
Jul 29, 4:55 PM MDT	Severe Thunderstorm Warning	BOU	Washington	47 min
Jul 29, 4:56 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min
Jul 29, 5:28 PM MDT	Flash Flood Warning	BOU	Washington	3 hr
Jul 29, 5:29 PM MDT	Severe Thunderstorm Warning	BOU	Washington	46 min

Nearby

Tornado Warnings in Colorado, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.