Alert archive / Colorado / Tornado Warnings in 1990

Tornado Warning 7, NWS Denver/Boulder, CO

June 15, 1990Morgan County, Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 15, 1990, 6:10 PM MDT for Morgan County, Weld County, Colorado. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jun 15, 1990, 6:10 PM MDT (00:10 UTC)
Expired
Jun 15, 1990, 6:40 PM MDT
In force
30 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Morgan County, CO, Weld 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

Denver, CO (KDEN), launched 00:00Z, 0.2 hours before the alert went out and 95 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 1990-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1346 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 1990-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.19395878Sfc1 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
1346 J/kg
Mixed-layer CIN
-83 J/kg
Mixed-layer LCL
2024 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
277 m²/s²
Significant tornado parameter
0.0
Supercell composite
10.9

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDEN 160014
TORDEN
COC087-123-160040-

BULLETIN...EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
610 PM MDT FRI JUN 15 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 640 PM  MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF NORTHEAST COLORADO:

     SOUTHWESTERN MORGAN
     SOUTH CENTRAL WELD

INCLUDING THE FOLLOWING TOWNS/CITIES:

     ROGGEN...DEARFIELD...AND WIGGINS.

THE STORM WAS LOCATED 3 MILES SOUTHEAST OF ROGGEN..WHICH IS 27
MILES SOUTHEAST OF GREELEY.

AT 610 PM MDT DOPPLER RADAR SHOWED A POSSIBLE TORNADO AND SPOTTERS
ALSO HAVE REPORTED A ROTATING CLOUD BASE.

THIS STORM IS MOVING EAST NORTHEAST AT 15 TO 20 MPH.

IN HOMES GO TO THE BASEMENT OR INTO A CLOSET OR BATHROOM.
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 NORTHEAST COLORADO UNTIL
8 PM 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.

HEITKAMP

LAT..LON  4004 10406 4006 10439 4023 10439 4028 10411

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.