Alert archive / Colorado / Tornado Warnings in 2004

Tornado Warning 43, NWS Denver/Boulder, CO

August 9, 2004Lincoln County, Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Aug 9, 2004, 6:46 PM MDT for Lincoln County, Washington County, Colorado. It was in force for 44 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
Aug 9, 2004, 6:46 PM MDT (00:46 UTC)
Expired
Aug 9, 2004, 7:30 PM MDT
In force
44 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

Counties Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 87 km from the middle of the area, began a volume at 00:46 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.

IssuedProductOfficeLasted
Aug 9, 12:30 PM MDTTornado WatchSPC7 hr
Aug 9, 6:45 PM MDTTornado WatchSPC4 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.8 hours before the alert went out and 47 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-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2004-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2151 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 00:00Z on 2004-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
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

Open this sounding in Storm Lab

The text

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

000 
WFUS55 KBOU 100046
TORBOU
COC073-121-100130-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
645 PM MDT MON AUG 9 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL LINCOLN COUNTY IN EAST CENTRAL COLORADO
  SOUTHWESTERN WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 730 PM MDT

* AT 645 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO OVER EXTREME SOUTHWESTERN
  WASHINGTON COUNTY...OR ABOUT 23 MILES NORTH OF LIMON...MOVING
  SOUTHEAST AT 20 MPH.

THE LINCOLN COUNTY SHERIFF DEPARTMENT REPORTED A BRIEF TORNADO ON 
HIGHWAY 71...20 MILES NORTH OF LIMON AT 643PM.    

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 3965 10370 3938 10370 3938 10339 3965 10339

$$
RTG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 6:00 PM MDTTornado WarningBOUWashington45 min
Aug 9, 6:13 PM MDTTornado WarningBOUElbert47 min
Aug 9, 6:31 PM MDTSevere Thunderstorm WarningBOUArapahoe59 min
Aug 9, 6:52 PM MDTTornado WarningBOUElbert38 min
Aug 9, 7:09 PM MDTTornado WarningBOUWashington36 min
Aug 9, 7:26 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln64 min
Aug 9, 8:31 PM MDTSevere Thunderstorm WarningBOULincoln29 min
Aug 9, 8:50 PM MDTSevere Thunderstorm WarningBOULincoln40 min
Aug 9, 9:00 PM MDTTornado WarningBOULincoln45 min
Aug 10, 2:48 PM MDTSevere Thunderstorm WarningBOULarimer, Weld57 min
Aug 10, 3:04 PM MDTTornado WarningBOULarimer, Weld41 min
Aug 10, 3:44 PM MDTTornado WarningBOUWeld46 min
Aug 10, 4:31 PM MDTSevere Thunderstorm WarningBOULarimer, Weld49 min
Aug 10, 4:49 PM MDTSevere Thunderstorm WarningBOUBoulder41 min
Aug 10, 5:06 PM MDTSevere Thunderstorm WarningBOUAdams, Broomfield, Denver39 min
Aug 10, 5:16 PM MDTSevere Thunderstorm WarningBOUAdams, Broomfield, Denver44 min
Aug 10, 5:32 PM MDTSevere Thunderstorm WarningBOUAdams, Broomfield, Denver43 min
Aug 10, 5:39 PM MDTSevere Thunderstorm WarningBOUBoulder36 min
Aug 10, 5:45 PM MDTSevere Thunderstorm WarningBOUWeld45 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.