Alert archive / Colorado / Tornado Warnings in 2003

Tornado Warning 7, NWS Denver/Boulder, CO

April 28, 2003Adams County, Morgan County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Apr 28, 2003, 8:00 PM MDT for Adams County, Morgan County, Colorado. It was in force for 45 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 28, 2003, 8:00 PM MDT (02:00 UTC)
Expired
Apr 28, 2003, 8:45 PM MDT
In force
45 min
Issued by
NWS Denver/Boulder, CO
Area
Counties, with a storm outline in the text

Counties Adams County, CO, Morgan County, CO

The radar

The Denver radar (KFTG), 50 km from the middle of the area, began a volume at 02:01 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 nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 2.0 hours before the alert went out and 65 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 2003-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1013 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 2003-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 127 square meters per square second.1939587897Sfc1 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
1013 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
1510 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
127 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.3
Supercell composite
5.1

Open this sounding in Storm Lab

The text

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

178 
WFUS55 KBOU 290200
TORBOU
COC001-087-290245-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
759 PM MDT MON APR 28 2003

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  EASTERN ADAMS COUNTY IN NORTHEAST COLORADO
  SOUTH CENTRAL MORGAN COUNTY IN NORTHEAST COLORADO

* UNTIL 845 PM MDT

* AT 759 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO NEAR LEADER...OR ABOUT 30
  MILES SOUTHWEST OF FORT MORGAN...MOVING NORTHEAST AT 15 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...ADENA...
LEADER AND SHAMROCK.

THIS TORNADO WARNING REPLACES THE SEVERE THUNDERSTORM WARNING THAT 
WAS TO EXPIRE AT 800 PM MDT. 

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.

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.

LAT...LON 3994 10422 3979 10410 3978 10372 4000 10372
          4009 10394
BAKER

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, 8:18 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, 5:04 PM MDTSevere Thunderstorm WarningBOUAdams56 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

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.