Alert archive / Colorado / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 63, NWS Denver/Boulder, CO

June 11, 1996Elbert County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 11, 1996, 4:59 PM MDT for Elbert County, Colorado. It was in force for 46 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 11, 1996, 4:59 PM MDT (22:59 UTC)
Expired
Jun 11, 1996, 5:45 PM MDT
In force
46 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

County Elbert County, CO

The radar

The Denver radar (KFTG), 66 km from the middle of the area, began a volume at 22:59 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, 11.0 hours before the alert went out and 101 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 1996-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 17 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 1996-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 square meters per square second.1939Sfc1 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
17 J/kg
Mixed-layer CIN
-338 J/kg
Mixed-layer LCL
2298 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-7 m²/s²
0-3 km storm-relative helicity
30 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 112301
SVRDEN
COC039-112345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
459 PM MDT TUE JUN 11 1996

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 545 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN EAST CENTRAL COLORADO
     CENTRAL ELBERT

AT 459 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 39 MILES SOUTHEAST OF DENVER.

THE STORM WAS MOVING TO THE EAST SOUTHEAST AT 10 TO 15 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 EASTERN
COLORADO UNTIL 900PM MDT.

GARD...WSFO DENVER
LAT...LON 3927 10403 3918 10416 3934 10440 3946 10432
          3941 10399

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 11, 11:09 AM MDT, 5 hours 50 minutes before
COZ030-032>050-120600-

SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO
NATIONAL WEATHER SERVICE DENVER CO
1115 AM MDT TUE JUN 11 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...AN UPPER LEVEL RIDGE WITH WARM AIR ALOFT WILL REMAIN OVER THE
CENTRAL ROCKY MOUNTAINS TODAY.  THE AIR MASS REMAINS RELATIVELY DRY OVER
THE MOUNTAINS AND NEAR THE EASTERN FOOTHILLS WITH HIGHER DEWPOINTS NEAR
THE EASTERN BORDER.  THE SATELLITE LOOP SHOWS MOISTURE ASSOCIATED WITH A
WEAK UPPER LEVEL DISTURBANCE MOVING INTO THE STATE THIS MORNING FROM THE
SOUTHWEST.  THIS MOISTURE ARRIVING OVER THE FORECAST AREA AT MAXIMUM
HEATING TIME WILL TEND TO DESTABLIZE THE AIR MASS OVER THE NORTHERN AND
CENTRAL MOUNTAINS AND EASTERN PLAINS THIS AFTERNOON AND EARLY TONIGHT.

SCATTERED THUNDERSTORMS WILL DEVELOP OVER THE NORTHERN AND CENTRAL
MOUNTAINS BY EARLY AFTERNOON AND SPREAD OVER THE NORTHEASTERN PLAINS
REACHING THE EASTERN BORDER BY LATE AFTERNOON.  THESE THUNDERSTORMS WILL
PRODUCE STRONG GUSTY WINDS...SMALL HAIL AND BRIEF HEAVY RAIN.  INITIALLY
THESE THUNDERSTORMS WILL BE HIGH BASED AND A FEW MAY POSE A THREAT OF
BRIEF WIND GUSTS OVER 50 KNOTS FROM MICROBURSTS.  AS THE STORMS MOVE
FARTHER EAST INTO A MORE MOIST AIRMASS THE THREAT OF POSSIBLE LARGE HAIL
WILL INCREASE MAINLY EAST OF A FORT MORGAN TO LIMON LINE.  WEAK WIND
SHEAR ALOFT MAKES CONDITIONS UNFAVORABLE FOR THUNDERSTORM TORNADO
FORMATION.

SPOTTER ACTIVATION WILL BE REQUIRED AT AROUND 100 PM MDT.

GARD...WSFO DENVER
Special weather statement, Jun 11, 3:18 PM MDT, 1 hour 41 minutes before
COZ042-112215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
318 PM MDT TUE JUN 11 1996

...STRONG THUNDERSTORM OVER NORTHEASTERN WELD COUNTY COLORADO...

AT 314 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A STRONG THUNDERSTORM 47 MILES NORTHEAST OF GREELEY OR JUST EAST OF
GROVER IN NORTHEASTERN WELD COUNTY COLORADO.  THE STORM WAS MOVING
TO THE EAST AT 10 TO 15 MPH.

ALL PEOPLE IN NORTHEASTERN WELD COUNTY SHOULD BE ALERT FOR STRONG
GUSTY WINDS...FREQUENT DANGEROUS LIGHTNING...SMALL HAIL AND BRIEF
HEAVY RAIN FROM THIS STORM UNTIL 415 PM MDT THIS AFTERNOON.

INTENSE LIGHTNING IS REPORTED WITH THIS STORM.  IF OUTDOORS...
STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES.  MOVE
INDOORS IF POSSIBLE.  WHEN INDOORS...STAY AWAY FROM WINDOWS AND
DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.
TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE
THUNDERSTORM APPROACHES.

GARD...WSFO DENVERn

LAT...LON 4057 10368 4077 10420 4100 10406 4097 10358
Special weather statement, Jun 11, 3:36 PM MDT, 1 hour 23 minutes before
COZ045-112230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
335 PM MDT TUE JUN 11 1996

...STRONG THUNDERSTORM EAST OF DENVER...

AT 332 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A STRONG THUNDERSTORM 2 MILES EAST OF MANILA VILLAGE ...OR ABOUT 23
MILES EAST OF DENVER.  THE STORM WAS DEVELOPING RAPIDLY LAND MOVING TO
THE EAST AT 10 TO 15 MPH.

ALL PEOPLE IN CENTRAL ADAMS AND ARAPAHOE COUNTIES OF COLORADO
INCLUDING THE FOLLOWING LOCATIONS
     BENNETT...BYERS...COUNTRY GARDENS...MANILA VILLAGE AND
     STRASBURG
SHOULD BE ALERT FOR STRONG GUSTY WINDS...SMALL HAIL...BRIEF HEAVY
RAIN AND FREQUENT DANGEROUS LIGHTNING FROM THIS STORM UNTIL 430 PM MDT
THIS AFTERNOON.

INTENSE LIGHTNING IS REPORTED WITH THIS STORM.  IF OUTDOORS...
STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES.  MOVE
INDOORS IF POSSIBLE.  WHEN INDOORS...STAY AWAY FROM WINDOWS AND
DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.
TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE
THUNDERSTORM APPROACHES.

GARD...WSFO DENVER
LAT...LON 3959 10410 3967 10458 3985 10450 3982 10400
Special weather statement, Jun 11, 3:47 PM MDT, 1 hour 12 minutes before
COZ033-035-038-112245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
345 PM MDT TUE JUN 11 1996

...STRONG THUNDERSTORM WEST OF FORT COLLINS...

AT 343 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A STRONG THUNDERSTORM 6 MILES SOUTH OF RUSTIC...OR ABOUT 24 MILES
WEST OF FORT COLLINS.  THE STORM WAS MOVING TO THE EAST
SOUTHEAST AT 10 TO 15 MPH.

ALL PEOPLE IN CENTRAL AND SOUTHEAST LARIMER COUNTY COLORADO...
INCLUDING THE FOLLOWING LOCATIONS
     BELLVUE...BUCKHORN MOUNTAIN...DRAKE...FORT COLLINS...GLEN
     HAVEN...MASONVILLE...MISHOWAKA...POUDRE PARK...RUSTIC AND
     TEDS PLACE
SHOULD BE ALERT FOR STRONG GUSTY WINDS...BRIEF HEAVY RAIN...
FREQUENT DANGEROUS LIGHTNING AND SMALL HAIL FROM THIS STORM UNTIL
445 PM MDT THIS AFTERNOON.

INTENSE LIGHTNING IS REPORTED WITH THIS STORM.  IF OUTDOORS...
STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES.  MOVE
INDOORS IF POSSIBLE.  WHEN INDOORS...STAY AWAY FROM WINDOWS AND
DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.
TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE
THUNDERSTORM APPROACHES.

GARD...WSFO DENVER
LAT...LON 4030 10526 4055 10567 4076 10554 4068 10499
Special weather statement, Jun 11, 3:58 PM MDT, 1 hour 1 minute before
COZ041-044>045-112245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
355 PM MDT TUE JUN 11 1996

...LINE OF STRONG THUNDERSTORMS DEVELOPING EAST OF DENVER...

AT 350 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE
OF STRONG THUNDERSTORMS DEVELOPING EAST OF DENVER FROM NEAR HOYT IN
SOUTHWESTERN MORGAN COUNTY TO WEST OF AGATE IN NORTHERN ELBERT
COUNTY.  THE STRONGEST STORM WAS LOCATED 4 MILES SOUTHWEST OF HOYT ...OR
ABOUT 54 MILES NORTHWEST OF LIMON.  THESE STORMS WERE MOVING TO THE EAST
SOUTHEAST AT 10 TO 15 MPH.

ALL PEOPLE IN SOUTHWESTERN MORGAN...EASTERN ADAMS...CENTRAL
ARAPAHOE...AND NORTH CENTRAL ELBERT COUNTIES OF COLORADO...
INCLUDING THE FOLLOWING LOCATIONS
     ADENA...ADENA SCHOOL...BYERS...COUNTRY GARDENS...DEER TRAIL
     ...HOYT...LEADER...STRASBURG AND TWELVE-MILE CORNER
SHOULD BE ALERT FOR STRONG GUSTY WINDS...BRIEF HEAVY RAIN...
FREQUENT DANGEROUS LIGHTNING...AND SMALL HAIL UNTIL 445 PM MDT
THIS AFTERNOON.

AT 340 PM MDT A WEATHER SPOTTER REPORTED PEA TO 1/2 INCH DIAMETER HAIL
AT BENNETT FROM THESE STORMS.

INTENSE LIGHTNING IS REPORTED WITH THIS STORM.  IF OUTDOORS...
STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES.  MOVE
INDOORS IF POSSIBLE.  WHEN INDOORS...STAY AWAY FROM WINDOWS AND
DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY.
TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE
THUNDERSTORM APPROACHES.

GARD...WSFO DENVER
LAT...LON 394<6 10419 3963 10452 4022 10400 4007 10367

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 7:16 PM MDTSevere Thunderstorm WarningBOULogan, Weld29 min
Jun 11, 4:06 PM MDTSevere Thunderstorm WarningBOUAdams24 min
Jun 11, 4:28 PM MDTSevere Thunderstorm WarningBOUAdams, Arapahoe, Washington47 min
Jun 11, 4:35 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert40 min
Jun 11, 4:44 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln46 min
Jun 11, 5:16 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln44 min
Jun 11, 5:30 PM MDTSevere Thunderstorm WarningBOUArapahoe, Elbert, Lincoln, Washington30 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.