Alert archive / Colorado / Tornado Warnings in 1996

Tornado Warning 59, NWS Denver/Boulder, CO

July 20, 1996Lincoln County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 20, 1996, 7:19 PM MDT for Lincoln County, Colorado. It was in force for 26 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
Jul 20, 1996, 7:19 PM MDT (01:19 UTC)
Expired
Jul 20, 1996, 7:45 PM MDT
In force
26 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

County Lincoln County, CO

The radar

The Pueblo radar (KPUX), 82 km from the middle of the area, began a volume at 01:19 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 00:00Z, 1.3 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 00:00Z on 1996-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 7 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 1996-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -15 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
7 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
3778 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
-15 m²/s²
0-3 km storm-relative helicity
26 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 210121
TORDEN
COC073-210145-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
719 PM MDT SAT JUL 20 1996

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 745 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES

IN EAST CENTRAL COLORADO
     CENTRAL LINCOLN

INCLUDING THE FOLLOWING LOCATIONS
     HUGO

AT 714 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM WITH A POSSIBLE TORNADO 10 MILES EAST OF HUGO...OR
ABOUT 24 MILES SOUTHEAST OF LIMON.

THE STORM WAS MOVING SLOWLY TO THE SOUTHEAST AT 5 TO 10 MPH. 

LARGE HAIL IN EXCESS OF AN INCH IN DIAMETER AND LOCALLY HEAVY RAIN 
ARE ALSO POSSIBLE WITH THIS STORM.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A 
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE 
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

LAT...LON 3913 10321 3898 10336 3908 10353 3924 10337

What forecasters said that day

The local office's own words before this tornado 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, Jul 20, 6:50 PM MDT, 29 minutes before
COZ046-047-210115-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
635 PM MDT SAT JUL 20 1996

...STRONG THUNDERSTORMS DEVELOPING IN CENTRAL LINCOLN COUNTY...

AT 640 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
ISOLATED...BUT STRONG...THUNDERSTORMS DEVELOPING IN CENTRAL LINCOLN
COUNTY.

THE STRONGEST STORMS WERE LOCATED 21 MILES SOUTH OF HUGO...NEAR THE
COUNTY LINE...ANOTHER JUST TO THE NORTH OF PUNKIN CENTER OR ABOUT 19
MILES SOUTH OF LIMON AND YET ANOTHER 12 MILES EAST OF HUGO OR 24
MILES SOUTHEAST OF LIMON

THESE STORMS WERE NEARLY STATIONARY.

LOCALLY HEAVY RAIN...SMALL SMALL HAIL...STRONG GUSTY WINDS AND
DANGEROUS LIGHTNING CAN BE EXPECTED WITH THESE STORMS...ALONG WITH
SOME MINOR FLOODING.

PERSONS IN CENTRAL LINCOLN COUNTY SHOULD REMAIN IN A PLACE OF SAFETY
UNTIL THE SEVERE WEATHER PASSES.  IF SEVERE WEATHER APPROACHES YOUR
AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER B
FLOOD-PRONE AREAS.

FMC

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 7:32 PM MDTSevere Thunderstorm WarningBOUElbert, Lincoln28 min
Jul 20, 7:57 PM MDTTornado WarningBOUElbert33 min
Jul 20, 8:00 PM MDTSevere Thunderstorm WarningBOULincoln45 min
Jul 20, 8:21 PM MDTSevere Thunderstorm WarningBOUElbert24 min

Nearby

Tornado Warnings in Colorado, 1996Every tornado warning in 1996Tornadoes 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.