Alert archive / Colorado / Tornado Warnings in 2002

Tornado Warning 20, NWS Denver/Boulder, CO

August 25, 2002Washington County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Aug 25, 2002, 1:28 AM MDT for Washington County, Colorado. It was in force for 62 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
Aug 25, 2002, 1:28 AM MDT (07:28 UTC)
Expired
Aug 25, 2002, 2:30 AM MDT
In force
62 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), 139 km from the middle of the area, began a volume at 07:29 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, 7.5 hours before the alert went out and 57 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 2002-08-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 740 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 2002-08-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
740 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
2494 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

Open this sounding in Storm Lab

The text

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

795 
WFUS55 KBOU 250728
TORDEN
COC121-250830-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
127 AM MDT SUN AUG 25 2002

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 230 AM MDT

* AT 127 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  THUNDERSTORM WITH A POSSIBLE TORNADO 8 MILES WEST OF BURDETT...OR
  ABOUT 14 MILES NORTHEAST OF AKRON...MOVING SOUTHEAST AT 10 MPH.
  ADDITIONAL STRONG THUNDERSTORMS WERE NEAR PREWITT RESERVOIR.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
BURDETT...LONE STAR AND PREWITT RESERVOIR.

VERY LARGE HAIL AND DAMAGING WINDS ARE ALSO POSSIBLE WITH THESE 
STORMS.

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 4043 10346 4014 10281 4044 10278 4044 10300

GIMMESTAD

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 6:17 PM MDTTornado WarningBOUWashington43 min
Aug 24, 6:32 PM MDTSevere Thunderstorm WarningBOUPhillips43 min
Aug 24, 6:59 PM MDTTornado WarningBOUWashington46 min
Aug 24, 7:48 PM MDTTornado WarningBOUWashington27 min
Aug 24, 10:22 PM MDTSevere Thunderstorm WarningBOUWashington53 min
Aug 24, 10:32 PM MDTTornado WarningBOUWashington43 min
Aug 24, 11:14 PM MDTTornado WarningBOUWashington16 min
Aug 25, 2:00 AM MDTTornado WarningBOUWashington60 min
Aug 25, 2:33 AM MDTTornado WarningBOUWashington57 min

Nearby

Tornado Warnings in Colorado, 2002Every tornado warning in 2002Tornadoes in 2002

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.