Alert archive / Colorado / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 69, NWS Denver/Boulder, CO

June 12, 19964 counties in Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 12, 1996, 5:30 PM MDT for 4 counties in Colorado. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 12, 1996, 5:30 PM MDT (23:30 UTC)
Expired
Jun 12, 1996, 6:15 PM MDT
In force
45 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Arapahoe County, CO, Elbert County, CO, Lincoln County, CO, Washington County, CO

The radar

The Denver radar (KFTG), 73 km from the middle of the area, began a volume at 23:32 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 11.5 hours before the alert went out and 66 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 1996-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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 1996-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 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
2 J/kg
Mixed-layer CIN
-280 J/kg
Mixed-layer LCL
1873 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
99 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 122332
SVRDEN
COC039-073-005-121-130015-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
530 PM MDT WED JUN 12 1996

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 615 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN EAST CENTRAL COLORADO
     EASTERN ELBERT AND NORTHERN LINCOLN

IN NORTHEASTERN COLORADO
     EASTERN ARAPAHOE AND SOUTHWESTERN WASHINGTON

INCLUDING THE FOLLOWING LOCATIONS
     AGATE...JOLLY RANCH AND LIMON

AT 529 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 2 MILES SOUTHEAST OF AGATE...OR ABOUT 17
MILES NORTHWEST OF LIMON.

THE STORM WAS MOVING TOWARD THE EAST AT 20 MPH.

IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY
SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS.
REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING
HAIL...DAMAGING WINDS OVER 60 MPH...DEADLY LIGHTNING...AND VERY
HEAVY RAIN.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
FORECAST OFFICE IN DENVER.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR A LARGE PART OFP
EASTERN COLORADO UNTIL 9PM.

HOLZINGER

LAT...LON 3932 10336 3918 10401 3944 10408 3972 10392
          3968 10347

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jun 12, 11:32 AM MDT, 5 hours 58 minutes before
COZ030-032>050-130600-

SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1130 AM MDT WED JUN 12 1996

THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES

ADAMS     ARAPAHOE     BOULDER   CLEAR CREEK   DENVER       DOUGLAS
ELBERT    GILPIN       GRAND     JACKSON       JEFFERSON    LARIMER
LINCOLN   LOGAN        MORGAN    PARK          PHILLIPS     SEDGWICK
SUMMIT    WASHINGTON   WELD

SYNOPSIS: SURFACE MOISTURE CONTINUES TO INCREASE ACROSS THE NORTHEAST
COLORADO TODAY AS WINDS SHIFT TO THE NORTHEAST.  IN ADDITION...A WEAK
WEATHER DISTURBACE IS EXPECTED TO MOVE ACROSS THE AREA AFTER 1PM.  AS A
RESULT  THUNDERSTORMS ARE AGAIN A POSSIBILITY THIS AFTERNOON.  THE
STORMS WILL DEVELOP OVER THE MOUNTAINS AND ALONG THE FOOTHILLS BY 1PM
AND DRIFT SLOWLY ONTO THE PLAINS DURING THE AFTERNOON.

SOME OF THE STORMS COULD BECOME SEVERE IN THE NORTHEAST...WITH LARGE
HAIL AND WIND GUSTS TO 60 MPH THE MAIN THREAT.  DUE TO THE SLOW MOVEMENT
OF THE STORMS...SOME AREAS COULD RECEIVE HEAVY RAIN WHICH COULD CAUSE
LOCAL FLOODING PROBLEMS.

SPOTTER ACTIVITATION MAY BE REQUIRED AFTER 2PM TODAY.

LESZCYNSKI
Special weather statement, Jun 12, 2:56 PM MDT, 2 hours 34 minutes before
COC059-122200-

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
255 PM MDT TUE JUN 11 1996

...HEAVY RAIN IN SOUTHERN JEFFERSON COUNTY...

SEVERAL SLOW MOVING THUNDERSTORMS ARE DROPPING SMALL HAIL AND HEAVY
RAIN IN SOUTHERN JEFFERSON COUNTY.  RESIDENTS OF OF SOUTHERN
JEFFERSON COUNTY SHOULD BE PREPARED FOR HEAVY RAIN PRODUCING LOCAL
FLOODING ALONG THE SOUTH PLATTE RIVER.

A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR JEFFERSON COUNT8Y AND
MUCH OF NORTHEAST COLORADO UNTIL 9PM.

RTG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 11, 6:00 PM MDTSevere Thunderstorm WarningBOULincoln45 min
Jun 12, 2:05 PM MDTSevere Thunderstorm WarningBOUJefferson25 min
Jun 12, 4:45 PM MDTSevere Thunderstorm WarningBOUElbert45 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1996Every severe thunderstorm warning in 1996

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; radar from the NEXRAD Level II archive.