Alert archive / Colorado / Tornado Warnings in 2004

Tornado Warning 49, NWS Denver/Boulder, CO

September 14, 2004Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Sep 14, 2004, 4:22 PM MDT for Washington County, Colorado. It was in force for 38 min. 11 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
Sep 14, 2004, 4:22 PM MDT (22:22 UTC)
Expired
Sep 14, 2004, 5:00 PM MDT
In force
38 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), 113 km from the middle of the area, began a volume at 22:24 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

TimeReportWhereRemark
Sep 14, 4:28 PM MDTHAIL 0.889 Ssw Akron, COWIPED OUT ALL HIS CROPS
Sep 14, 4:28 PM MDTHAIL 0.889 Ssw Akron, COWIPED OUT ALL HIS CROPS
Sep 14, 4:28 PM MDTHAIL 0.889 Ssw Akron, COWIPED OUT ALL HIS CROPS
Sep 14, 4:28 PM MDTHAIL 0.889 Ssw Akron, COWIPED OUT ALL HIS CROPS
Sep 14, 4:40 PM MDTHAIL 17 S Akron, COHAIL SWATH 1 MILE LONG 6 INCHES DEEP
Sep 14, 4:40 PM MDTHAIL 17 S Akron, COHAIL SWATH 1 MILE LONG 6 INCHES DEEP
Sep 14, 4:40 PM MDTHAIL 17 S Akron, COHAIL SWATH 1 MILE LONG 6 INCHES DEEP
Sep 14, 4:57 PM MDTHAIL 17 S Platner, CO
Sep 14, 4:57 PM MDTHAIL 17 S Platner, CO
Sep 14, 4:57 PM MDTHAIL 17 S Platner, CO
Sep 14, 4:57 PM MDTHAIL 17 S Platner, 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.

IssuedProductOfficeLasted
Sep 14, 2:20 PM MDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.4 hours before the alert went out and 28 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 12:00Z on 2004-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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 12:00Z on 2004-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1028 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
202 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 142222
TORBOU
COC121-142300-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
422 PM MDT TUE SEP 14 2004

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL WASHINGTON COUNTY IN NORTHEAST COLORADO
  THIS INCLUDES THE CITY OF AKRON

* UNTIL 500 PM MDT

* AT 422 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 13 MILES WEST OF ELBA...OR
  ABOUT 16 MILES SOUTHWEST OF AKRON...MOVING EAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...AKRON...
ELBA...MIDWAY AND PLATNER.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

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 4029 10347 3984 10346 3988 10303 4029 10303

$$

RPK

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 3:39 PM MDTSevere Thunderstorm WarningBOULarimer, Weld51 min
Sep 14, 3:59 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington46 min
Sep 14, 4:16 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld44 min
Sep 14, 4:56 PM MDTTornado WarningBOUWashington49 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.