Alert archive / Colorado / Tornado Warnings in 2003

Tornado Warning 13, NWS Denver/Boulder, CO

April 30, 2003Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Apr 30, 2003, 4:15 PM MDT for Weld County, Colorado. It was in force for 60 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 30, 2003, 4:15 PM MDT (22:15 UTC)
Expired
Apr 30, 2003, 5:15 PM MDT
In force
60 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Weld County, CO

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 10.3 hours before the alert went out and 97 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 2003-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 446 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 2003-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 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
446 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
984 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
-6 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.

527 
WFUS55 KBOU 302215
TORBOU
COC123-302315-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
ISSUED BY NWS PUEBLO CO
414 PM MDT WED APR 30 2003

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 515 PM MDT

* AT 414 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED A
  TORNADO WAS 4 MILES EAST OF ROGGEN...OR ABOUT 27 MILES WEST OF FORT
  MORGAN...MOVING NORTHEAST AT 20 MPH.

* SOME LOCATIONS AFFECTED WILL BE...
  MASTERS AROUND 430 PM MDT
  RIVERSIDE RESERVOIR AROUND 435 PM MDT

AT 412 PM THE PUBLIC SAW A TORNADO 10 MILES EAST OF HUDSON.

IF YOU ARE OUTDOORS...OR IN A MOBILE HOME...OR IN A VEHICLE...AND A
TORNADO IS VERY NEAR...GO TO A NEARBY REINFORCED BUILDING AND GET IN
AN INTERIOR ROOM ON THE LOWEST FLOOR POSSIBLE AWAY FROM WINDOWS.

LAT...LON 4017 10445 4004 10428 4007 10415 4042 10416

$$

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 29, 9:27 PM MDTTornado WarningBOUWashington48 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, 4:31 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.