Alert archive / Colorado / Tornado Warnings in 1994

Tornado Warning 8, NWS Denver/Boulder, CO

July 16, 1994Larimer County, Weld County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jul 16, 1994, 5:30 PM MDT for Larimer County, Weld County, Colorado. It was in force for 45 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jul 16, 1994, 5:30 PM MDT (23:30 UTC)
Expired
Jul 16, 1994, 6:15 PM MDT
In force
45 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Larimer County, CO, Weld County, CO

What was reported inside it

TimeReportWhereRemark
Jul 16, 5:45 PM MDTTornado F0Prospect Valley, COSpotters reported a brief tornado touchdown in an open field east of Prospect Valley. No injuries or damage were reported. This tornado was seen simultaneously with the above tornado.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 11.5 hours before the alert went out and 166 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 1994-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 26 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 1994-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
26 J/kg
Mixed-layer CIN
-553 J/kg
Mixed-layer LCL
1654 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
22 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 162334 COR
TORDEN
COC069-123-170015-

BULLETIN - EBS ACTIVATION REQUESTED
TORNADO WARNING...CORRECTION TO ADD PROSPECT VALLEY TO WARNING
NATIONAL WEATHER SERVICE DENVER CO
530 PM MDT SAT JUL 16 1994

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

IN NORTH CENTRAL COLORADO
     SOUTHEASTERN LARIMER

IN NORTHEASTERN COLORADO
     SOUTHWESTERN WELD

INCLUDING THE FOLLOWING LOCATIONS
     BARNESVILLE...BERTHOUD...EVANS...FORT COLLINS...GARDEN CITY
     ...GILCREST...GILL...GREELEY...HARMONY...KERSEY...LA SALLE
     ...LOVELAND...LUCERNE...MASONVILLE...MILLIKEN...MILTON
     RESERVOIR...PECKHAM...PLATTEVILLE...RIVERSIDE RESERVOIR...
     ROGGEN...SEVERANCE...TIMNATH...WINDSOR AND PROSPECT VALLEY.

AT 528 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A POSSIBLE TORNADO 4 MILES SOUTH OF TIMNATH ...OR ABOUT 9 MILES
SOUTHEAST OF FORT COLLINS.

AT 513PM A TORNADO WAS REPORTED 3 MILES SOUTH OF KERSEY IN WELD COUNTY.
AT 528PM WINDS WERE GUSTING TO 75 MPH AT HORSETOOTH RESERVOIR JUST WEST
OF FORT COLLINS.  AT 528 HAIL TO 1 1/4 INCH WAS REPORTED AT WINDSOR IN
WELD COUNTY.

THIS IS A COMPLEX OF SEVERE THUNDERSTORMS WHICH ARE MOVING TOWARD THE
SOUTH SOUTHEAST AT 20 MPH.

MOVE TO A PLACE OF SAFETY IF YOU ARE NEAR ANY OF THESE THUNDERSTORMS.

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.

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

HOLZINGER

LAT...LON 4005 10428 4035 10529 4060 10532 4044 10420

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 16, 1:24 PM MDT, 4 hours 6 minutes before
COZ041-162000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
125 PM MDT SAT JUL 16 1994

...STRONG THUNDERSTORM OVER DOUGLAS COUNTY...

AT 120 PM...A STRONG THUNDERSTORM WAS INDICATED ABOUT 5 MILES SOUTH OF
CASTLE ROCK MOVING EAST AT 20 MPH AND WILL LIKELY MOVE ACROSS SOUTHEAST
DOUGLAS COUNTY BY 200 PM MDT.

IF YOU ARE IN THE PATH OF THIS STORM...ESPECIALLY IN OR NEAR THE TOWNS
OF LARKSPUR...CASTLE ROCK AND FRANKTOWN...BE READY  FOR WINDS GUSTING
TO 40 MPH...AND THE POSSIBILITY OF BRIEF HEAVY RAIN OR HAIL.

STAY TUNED TO NOAA WEATHER RADIO FOR ANY UPDATES OR POSSIBLE WARNINGS.

DULONG
Special weather statement, Jul 16, 3:10 PM MDT, 2 hours 20 minutes before
COZ038-042-162215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
310 PM MDT SAT JUL 16 1994

...VERY STRONG THUNDERSTORM HEADING TOWARDS LARIMER AND WELD COUNTIES...

A VERY STRONG THUNDERSTORM JUST ACROSS THE BORDER IN WYOMING WILL LIKELY
MOVE INTO EXTREME NORTHEAST LARIMER AND NORTHWEST WELD COUNTIES OF
COLORADO BY 330 PM.

IF YOU ARE IN THE PATH OF THIS STORM...ESPECIALLY IN OR NEAR THE
COLORADO TOWNS OF VIRGINIA DALE...LIVERMORE...NORFOLK...WARREN...
WELLINGTON OR NUNN...BE READY TO TAKE COVER FROM THREATENING WEATHER
FROM NOW THROUGH 415 PM.

A WARNING MAY BE ISSUED FOR THIS STORM SHORTLY.

DULONG
Special weather statement, Jul 16, 3:12 PM MDT, 2 hours 18 minutes before
COZ038-042-162215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
310 PM MDT SAT JUL 16 1994

...VERY STRONG THUNDERSTORM HEADING TOWARDS LARIMER AND WELD COUNTIES...

A VERY STRONG THUNDERSTORM JUST ACROSS THE BORDER IN WYOMING WILL LIKELY
MOVE INTO EXTREME NORTHEAST LARIMER AND NORTHWEST WELD COUNTIES OF
COLORADO BY 330 PM.

IF YOU ARE IN THE PATH OF THIS STORM...ESPECIALLY IN OR NEAR THE
COLORADO TOWNS OF VIRGINIA DALE...LIVERMORE...NORFOLK...WARREN...
WELLINGTON OR NUNN...BE READY TO TAKE COVER FROM THREATENING WEATHER
FROM NOW THROUGH 415 PM.

A WARNING MAY BE ISSUED FOR THIS STORM SHORTLY.

DULONG
Special weather statement, Jul 16, 5:20 PM MDT, 10 minutes before
COZ038>092-170000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
515 PM MDT SAT JUL 16 1994

...TORNADO WATCH IN EFFECT FOR MUCH OF NORTHEAST COLORADO UNTIL 1100
PM...

A TORNADO WATCH NOW COVERS ALL OF NORTHEAST COLORADO FROM THE FOOTHILLS
EASTWARD TO THE KANSAS/NEBRASKA BORDER.  SEVERAL SEVERE-TORNADIC STORMS
WERE LOCATED IN LARIMER AND WELD COUNTY AT 515 PM.  MORE SEVERE AND
TORNADIC THUNDERSTORMS ARE EXPECTED TOP DEVELOP DURING THE EVENING
ACROSS NORTHEAST COLORADO.

RESIDENTS IN NORTHEAST COLORADO ARE URGED TO REMAIN ALERT TO CHANGING
WEATHER CONDITIONS AND MOVE TO A SAFE LOCATION IF A SEVERE THUNDERSTORM
OR TORNADO WARNING IS ISSUED OR THREARTENING WEATHER IS OBSERVED.

THE SEVERE THUNDERSTORM WATCH ISSUED EARLIER FOR NORTHEAST COLORADO IS
NO LONGER IN EFFECT.

IMY

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 15, 6:06 PM MDTSevere Thunderstorm WarningBOUDouglas39 min
Jul 16, 3:22 PM MDTSevere Thunderstorm WarningBOULarimer, Weld38 min
Jul 16, 4:04 PM MDTTornado WarningBOULarimer, Weld26 min
Jul 16, 4:30 PM MDTTornado WarningBOULarimer, Weld30 min
Jul 16, 5:00 PM MDTTornado WarningBOULarimer, Weld30 min
Jul 16, 5:52 PM MDTTornado WarningBOUAdams, Morgan53 min

Nearby

Tornado Warnings in Colorado, 1994Every tornado warning in 1994Tornadoes in 1994

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.