Alert archive / Colorado / Tornado Warnings in 2003

Tornado Warning 11, NWS Denver/Boulder, CO

April 29, 2003Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Apr 29, 2003, 9:27 PM MDT for Washington County, Colorado. It was in force for 48 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
Apr 29, 2003, 9:27 PM MDT (03:27 UTC)
Expired
Apr 29, 2003, 10:15 PM MDT
In force
48 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), 109 km from the middle of the area, began a volume at 03:31 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
Apr 29, 7:45 PM MDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 3.5 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-pSkew-T log-p diagram, Denver, CO at 00:00Z on 2003-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 537 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 2003-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.19395878Sfc1 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
537 J/kg
Mixed-layer CIN
-11 J/kg
Mixed-layer LCL
1453 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
194 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.3

Open this sounding in Storm Lab

The text

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

895 
WFUS55 KBOU 300327
TORBOU
COC121-300415-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
927 PM MDT TUE APR 29 2003

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 1015 PM MDT

* AT 927 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 11 MILES SOUTH OF LINDON...OR
  ABOUT 25 MILES NORTHEAST OF LIMON...MOVING EAST AT 25 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ANTON...
ARICKAREE SCHOOL...ELBA...LINDON AND WOODLIN SCHOOL.

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 3994 10352 3959 10361 3959 10328 3961 10286
          4003 10284

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 6:23 PM MDTSevere Thunderstorm WarningBOUWeld67 min
Apr 29, 6:29 PM MDTSevere Thunderstorm WarningBOUArapahoe, Douglas, Elbert46 min
Apr 29, 6:40 PM MDTSevere Thunderstorm WarningBOUMorgan65 min
Apr 29, 6:42 PM MDTSevere Thunderstorm WarningBOUWeld48 min
Apr 29, 6:59 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe61 min
Apr 29, 7:05 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver, Douglas, Elbert55 min
Apr 29, 7:08 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver, Douglas, Elbert52 min
Apr 29, 7:16 PM MDTTornado WarningBOUMorgan44 min
Apr 29, 7:21 PM MDTSevere Thunderstorm WarningBOULogan, Weld54 min
Apr 29, 7:32 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert43 min
Apr 29, 8:00 PM MDTSevere Thunderstorm WarningBOUWashington60 min
Apr 29, 8:29 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert46 min
Apr 29, 9:01 PM MDTSevere Thunderstorm WarningBOUWashington29 min
Apr 29, 9:13 PM MDTSevere Thunderstorm WarningBOULincoln, Washington62 min
Apr 29, 9:16 PM MDTSevere Thunderstorm WarningBOUSedgwick44 min
Apr 30, 1:02 PM MDTSevere Thunderstorm WarningBOULincoln58 min
Apr 30, 1:18 PM MDTTornado WarningBOULincoln57 min
Apr 30, 2:12 PM MDTSevere Thunderstorm WarningBOULarimer33 min
Apr 30, 4:15 PM MDTTornado WarningBOUWeld60 min
Apr 30, 4:31 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver59 min

Nearby

Tornado Warnings in Colorado, 2003Every tornado warning in 2003Tornadoes in 2003

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.