Alert archive / Colorado / Tornado Warnings in 1998

Tornado Warning 25, NWS Denver/Boulder, CO

July 24, 1998Adams County, Arapahoe County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 24, 1998, 3:54 PM MDT for Adams County, Arapahoe County, Colorado. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jul 24, 1998, 3:54 PM MDT (21:54 UTC)
Expired
Jul 24, 1998, 4:30 PM MDT
In force
36 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Adams County, CO, Arapahoe County, CO

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 9.9 hours before the alert went out and 96 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 1998-07-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 340 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 1998-07-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
340 J/kg
Mixed-layer CIN
-69 J/kg
Mixed-layer LCL
751 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
-13 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.

543 
WFUS1 KDEN 242157 RRA
TORDEN
COC001-005-242230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
354 PM MDT FRI JUL 24 1998

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

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

* UNTIL 430 PM MDT

* AT 351 PM MDT...SPOTTERS REPORTED A SMALL TORNADO 3 MILES 
    SOUTHWEST OF BYERS...OR ABOUT 37 MILES EAST OF DENVER.    
    THE THUNDERSTORM WAS NEARLY STATIONARY.

LOCATIONS IN THE WARNING INCLUDE...BENNETT...BYERS...COUNTRY GARDENS
AND STRASBURG

SMALL...SHORT-LIVED TORNADOES CAN BE EXPECTED ON THE GUST FRONT 
ASSOCIATED WITH THE DEVELOPING THUNDERSTORMS THROUGH 430 PM.

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 3969 10453 3957 10437 3981 10394 3982 10432
DANKERS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 24, 3:07 PM MDTFlash Flood WarningBOUMorgan113 min
Jul 24, 3:52 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert28 min
Jul 24, 5:10 PM MDTFlash Flood WarningBOUWeld95 min

Nearby

Tornado Warnings in Colorado, 1998Every tornado warning in 1998Tornadoes in 1998

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.