Alert archive / Colorado / Severe Thunderstorm Warnings in 1986

Severe Thunderstorm Warning 7, NWS Denver/Boulder, CO

June 8, 1986Adams County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 8, 1986, 3:26 PM MDT for Adams County, Colorado. It was in force for 54 min.

The area

The counties it named.

The facts

Issued
Jun 8, 1986, 3:26 PM MDT (21:26 UTC)
Expired
Jun 8, 1986, 4:20 PM MDT
In force
54 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

County Adams 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, 9.4 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 12:00Z on 1986-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 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 1986-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
117 J/kg
Mixed-layer CIN
-286 J/kg
Mixed-layer LCL
776 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
50 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 082126
SVRDEN
COC001-082220-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
326 PM MDT SUN JUN 8 1986

THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM 
WARNING EFFECTIVE UNTIL 420 PM MDT FOR PEOPLE IN THE FOLLOWING 
COUNTY OF

NORTHEAST COLORADO...CENTRAL ADAMS

THIS WARNING INCLUDES THE FOLLOWING TOWNS AND CITIES... WATKINS AND
BENNETT

AT 320PM MDT RADAR INDICATED A SEVERE THUNDERSTORM 30 MILES EAST OF
DENVER...NEAR THE TOWN OF BENNETT.  THE STORM WAS MOVING TOWARD THE
NORTH NORTHEAST AT 15 MPH.

REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE HAIL...DAMAGING
WINDS OF OVER 60 MPH...DEADLY LIGHTNING...AND HEAVY RAINS THAT CAN
QUICKLY FLOOD A LOW LYING AREA.

THESE STORMS CAN AND OCCASIONALLY DO PRODUCE A TORNADO WITH LITTLE OR
NO ADVANCE WARNING...SO BE ON THE LOOKOUT AND BE PREPARED TO MOVE TO
A PLACE OF SAFETY IF ONE IS SPOTTED.

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

A TORNADO WATCH REMAINS IN EFFECT FOR NORTHEASTERN COLORADO AND
EAST CENTRAL COLORADO TIL 8PM MDT.

MARKKANEN

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 7:37 PM MDTSevere Thunderstorm WarningBOUMorgan53 min
Jun 8, 4:40 PM MDTSevere Thunderstorm WarningBOUWeld65 min
Jun 8, 5:17 PM MDTTornado WarningBOUAdams, Arapahoe23 min
Jun 8, 5:44 PM MDTTornado WarningBOUAdams26 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1986Every severe thunderstorm warning in 1986

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.