Alert archive / Colorado / Tornado Warnings in 2003

Tornado Warning 8, NWS Denver/Boulder, CO

April 28, 2003Adams County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Apr 28, 2003, 8:49 PM MDT for Adams County, Colorado. It was in force for 41 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, 8:49 PM MDT (02:49 UTC)
Expired: Apr 28, 2003, 9:30 PM MDT
In force: 41 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), 66 km from the middle of the area, began a volume at 02:48 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, 2.8 hours before the alert went out and 48 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

597 
WFUS55 KBOU 290249
TORBOU
COC001-290330-

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

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN ADAMS COUNTY IN NORTHEAST COLORADO

* UNTIL 930 PM MDT

* AT 845 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A THUNDERSTORM WITH A POSSIBLE TORNADO 3 MILES WEST OF             
  SHAMROCK...OR ABOUT 26 MILES SOUTH OF FORT MORGAN...MOVING         
  NORTHEAST AT 8 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...SHAMROCK.
PEOPLE IN THE TOWN OF SHAMROCK SHOULD MOVE TO A PLACE OF SAFETY 
IMMEDIATELY. 

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 4000 10371 4000 10388 3987 10393 3981 10382
          3987 10371
BAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 6:09 PM MDT	Tornado Warning	BOU	Morgan	31 min
Apr 28, 7:00 PM MDT	Severe Thunderstorm Warning	BOU	Adams	60 min
Apr 28, 8:00 PM MDT	Tornado Warning	BOU	Adams, Morgan	45 min
Apr 28, 8:18 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Arapahoe, Denver	57 min
Apr 28, 9:28 PM MDT	Severe Thunderstorm Warning	BOU	Washington	57 min
Apr 28, 10:11 PM MDT	Severe Thunderstorm Warning	BOU	Adams	19 min
Apr 28, 10:29 PM MDT	Severe Thunderstorm Warning	BOU	Morgan, Washington	56 min
Apr 29, 3:48 PM MDT	Severe Thunderstorm Warning	BOU	Adams	42 min
Apr 29, 4:15 PM MDT	Severe Thunderstorm Warning	BOU	Douglas	45 min
Apr 29, 4:28 PM MDT	Severe Thunderstorm Warning	BOU	Adams	32 min
Apr 29, 4:39 PM MDT	Severe Thunderstorm Warning	BOU	Weld	66 min
Apr 29, 4:48 PM MDT	Severe Thunderstorm Warning	BOU	Lincoln	57 min
Apr 29, 4:55 PM MDT	Tornado Warning	BOU	Lincoln	50 min
Apr 29, 4:58 PM MDT	Severe Thunderstorm Warning	BOU	Elbert	62 min
Apr 29, 5:04 PM MDT	Severe Thunderstorm Warning	BOU	Adams	56 min
Apr 29, 5:11 PM MDT	Severe Thunderstorm Warning	BOU	Weld	64 min
Apr 29, 5:18 PM MDT	Severe Thunderstorm Warning	BOU	Weld	57 min
Apr 29, 5:38 PM MDT	Severe Thunderstorm Warning	BOU	Jefferson	37 min
Apr 29, 5:58 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Denver, Douglas	47 min
Apr 29, 5:59 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Elbert	61 min

Nearby

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