Alert archive / Colorado / Tornado Warnings in 1990

Tornado Warning 1, NWS Denver/Boulder, CO

May 29, 1990Adams County, Denver County, Jefferson County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at May 29, 1990, 12:39 PM MDT for Adams County, Denver County, Jefferson County, Colorado. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
May 29, 1990, 12:39 PM MDT (18:39 UTC)
Expired
May 29, 1990, 1:09 PM MDT
In force
30 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Adams County, CO, Denver County, CO, Jefferson County, CO

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Fort Carson/Butt, CO (KFCS), launched 12:00Z, 6.7 hours before the alert went out and 118 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, Fort Carson/Butt, CO at 12:00Z on 1990-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 32 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Carson/Butt, CO at 12:00Z on 1990-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.193958Sfc1 km3 km6 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
32 J/kg
Mixed-layer CIN
-55 J/kg
Mixed-layer LCL
814 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
134 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.

000 
TTAA00 KDEN 291842
TORDEN
COC059-031-001-291909-

BULLETIN...EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
1239 PM MDT TUE MAY 29 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 109 PM  MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF NORTHEAST COLORADO:

     EXTREME NORTHEASTERN JEFFERSON
     NORTHERN DENVER
     EXTREME WESTERN ADAMS

INCLUDING THE FOLLOWING TOWNS/CITIES:

     ARVADA..BROOMFIELD..COMMERCE CITY..DENVER..MOUNTAIN VIEW..
     NORTHGLENN..THORNTON..WESTMINSTER..AND WHEAT RIDGE

AT 1235PM MDT A TORNADO WAS REPORTED ON THE GROUND IN THE VICNITY OF
32ND STREET AND FEDERAL BOULEVARD.  THE THUNDERSTORM SPAWING THIS
TORNADO IS MOVING NORTH ABOUT 25 MPH.  SO FAR NO DAMAGE REPORT HAS BEEN
RECEIVED.
IN HOMES GO TO THE BASEMENT OR A FULLY ENCLOSED ROOM.
IN SCHOOLS..HIGH RISES AND HOSPITALS GO TO AN INTERIOR
HALLWAY ON THE LOWEST FLOOR.  IF IN MOBILE HOMES OR VEHICLES..
EVACUATE THEM AND GO TO A SUBSTANTIAL SHELTER.  IF NO SHELTER
IS AVAILABLE..LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT.
IN ALL CASES..STAY AWAY FROM WINDOWS..DOORS AND OUTSIDE WALLS.

A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF SOUTHEAST COLORADO
UNTIL 4PM MDT.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE
IN DENVER..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663.  DO NOT CALL THIS NUMBER FOR INFORMATION.

END...GCF...WSFO DENVER
LAT..LON  3972 10490 3970 10508 3990 10510 3993 10493

Nearby

Tornado Warnings in Colorado, 1990Every tornado warning in 1990Tornadoes in 1990

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.