Alert archive / Colorado / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

June 6, 1990Adams County, Washington County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 6, 1990, 5:15 PM MDT for Adams County, Washington County, Colorado. It was in force for 41 min.

The area

The counties it named.

The facts

Issued
Jun 6, 1990, 5:15 PM MDT (23:15 UTC)
Expired
Jun 6, 1990, 5:56 PM MDT
In force
41 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Adams County, CO, Washington 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 12:00Z, 11.3 hours before the alert went out and 46 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 1990-06-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 101 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 12:00Z on 1990-06-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 36 square meters per square second.193958Sfc1 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
101 J/kg
Mixed-layer CIN
-396 J/kg
Mixed-layer LCL
1467 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
36 m²/s²
0-3 km storm-relative helicity
89 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 062314
SVRDEN
COC073-039-005-001-121-062356-

BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
515 PM MDT WED JUN 06 1990

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 600 PM  MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF EAST CENTRAL COLORADO:

     EASTERN ARAPAHOE
     SOUTHEASTERN ADAMS
     EXTREME SOUTHWESTERN WASHINGTON

INCLUDING THE FOLLOWING TOWNS/CITIES:

     NONE

AT 515 PM MDT RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 10 MILES 
NORTHEAST OF LAST CHANCE COLORADO...OR ABOUT 30 MILES NORTH OF LIMON.
THE STORM WAS MOVING TOWARD THE EAST SOUTHEAST AT 10 MPH.  LARGE
HAIL AND HEAVY RAIN ARE PROBABLE WITH THIS STORM.

IF SEVERE WEATHER APPROACHES YOUR AREA..GO TO A STURDY
SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD PRONE AREAS.
REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING
HAIL..DAMAGING WINDS OF OVER 60 MPH..DEADLY LIGHTNING..AND
HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA.

A TORNADO WATCH REMAINS IN EFFECT FOR MOST OF NORTHEASTERN COLORADO
UNTIL 9 PM MDT.

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

MARKKANEN 

LAT..LON  3958 10358 3957 10394 3980 10388 3980 10360

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 4:45 PM MDTSevere Thunderstorm WarningBOUMorgan, Weld40 min
Jun 6, 5:15 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln41 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1990Every severe thunderstorm warning 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.