Alert archive / Colorado / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

April 29, 2003Adams County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Apr 29, 2003, 5:04 PM MDT for Adams County, Colorado. It was in force for 56 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, 5:04 PM MDT (23:04 UTC)
Expired
Apr 29, 2003, 6:00 PM MDT
In force
56 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

County Adams County, CO

The radar

The Denver radar (KFTG), 20 km from the middle of the area, began a volume at 23:05 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, 3:10 PM MDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.1 hours before the alert went out and 121 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 2003-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 44 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 2003-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 74 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
44 J/kg
Mixed-layer CIN
-257 J/kg
Mixed-layer LCL
1226 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
74 m²/s²
0-3 km storm-relative helicity
127 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.

295 
WUUS55 KBOU 292304
SVRBOU
COC001-300000-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
504 PM MDT TUE APR 29 2003

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTH CENTRAL ADAMS COUNTY IN NORTHEAST COLORADO

* UNTIL 600 PM MDT

* AT 504 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER WEST CENTRAL ADAMS COUNTY...OR ABOUT 19
  MILES NORTHEAST OF DENVER...MOVING NORTHEAST AT 10 MPH.

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE
FOR DAMAGING WINDS IN EXCESS OF 58 MPH...LARGE HAIL...AND DEADLY
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG
BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN...AND DEADLY
LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY
FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3992 10474 3993 10456 4000 10446 4000 10473

GARD...WFO BOULDER

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 28, 6:09 PM MDTTornado WarningBOUMorgan31 min
Apr 28, 7:00 PM MDTSevere Thunderstorm WarningBOUAdams60 min
Apr 28, 8:00 PM MDTTornado WarningBOUAdams, Morgan45 min
Apr 28, 8:18 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Denver57 min
Apr 28, 8:49 PM MDTTornado WarningBOUAdams41 min
Apr 28, 9:28 PM MDTSevere Thunderstorm WarningBOUWashington57 min
Apr 28, 10:11 PM MDTSevere Thunderstorm WarningBOUAdams19 min
Apr 28, 10:29 PM MDTSevere Thunderstorm WarningBOUMorgan, Washington56 min
Apr 29, 3:48 PM MDTSevere Thunderstorm WarningBOUAdams42 min
Apr 29, 4:15 PM MDTSevere Thunderstorm WarningBOUDouglas45 min
Apr 29, 4:28 PM MDTSevere Thunderstorm WarningBOUAdams32 min
Apr 29, 4:39 PM MDTSevere Thunderstorm WarningBOUWeld66 min
Apr 29, 4:48 PM MDTSevere Thunderstorm WarningBOULincoln57 min
Apr 29, 4:55 PM MDTTornado WarningBOULincoln50 min
Apr 29, 4:58 PM MDTSevere Thunderstorm WarningBOUElbert62 min
Apr 29, 5:11 PM MDTSevere Thunderstorm WarningBOUWeld64 min
Apr 29, 5:18 PM MDTSevere Thunderstorm WarningBOUWeld57 min
Apr 29, 5:38 PM MDTSevere Thunderstorm WarningBOUJefferson37 min
Apr 29, 5:58 PM MDTSevere Thunderstorm WarningBOUArapahoe, Denver, Douglas47 min
Apr 29, 5:59 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert61 min

Nearby

Severe Thunderstorm Warnings in Colorado, 2003Every severe thunderstorm warning 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.