Alert archive / Colorado / Severe Thunderstorm Warnings in 1994

Severe Thunderstorm Warning 7, NWS Denver/Boulder, CO

April 25, 1994Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Apr 25, 1994, 9:45 AM MDT for Weld County, Colorado. It was in force for 30 min.

The area

The counties it named.

The facts

Issued: Apr 25, 1994, 9:45 AM MDT (15:45 UTC)
Expired: Apr 25, 1994, 10:15 AM MDT
In force: 30 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Weld County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 3.8 hours before the alert went out and 125 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1386 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: 67 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 251546
SVRDEN
COC123-251615-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
945 AM MDT MON APR 25 1994

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 1015 AM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN NORTHEASTERN COLORADO
     NORTH CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     HEREFORD AND ROCKPORT

AT 945 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 12 MILES EAST OF ROCKPORT ...OR ABOUT 30
MILES NORTH OF GREELEY.

THE STORM WAS MOVING TO THE NORTHEAST 20 TO 25 MPH.

THIS THUNDERSTORM HAS HAD A HISTORY OF PRODUCING LARGE HAIL AND 
HEAVY RAIN.

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.


LAT...LON 4073 10441 4074 10486 4100 10484 4101 10420

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, Apr 25, 8:05 AM MDT, 1 hour 40 minutes before

COZ038-042>043-251500-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
805 AM MDT MON APR 25 1994

...THUNDERSTORMS ALONG THE FRONT RANGE...

AT 750 AM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS ALONG THE FRONT RANGE.  THE STRONGEST THUNDERSTORM WAS
NEAR BERTHOUD IN LARIMER COUNTY...OR 19 MILES SOUTH OF FORT COLLINS.
OTHER STORMS WERE IN DOUGLAS COUNTY NEAR SEDALIA...OR 20 MILES SOUTH OF
DENVER AND JUST WEST OF GOLDEN IN JEFFERSON COUNTY.  THE STORMS WERE
MOVING NORTH NORTHWEST AT 20 MPH.

WEATHER SPOTTERS AT 745 AM REPORTED PEA SIZE HAIL PARTIALLY COVERING THE
GROUND IN BERTHOUD.  PEA SIZE HAIL WAS ALSO REPORTED IN GOLDEN.

PEOPLE ALONG THE FRONT RANGE...INCLUDING FORT COLLINS...LOVELAND...
DENVER AND BOULDER SHOULD BE ALERT FOR GUSTY WINDS...SMALL HAIL AND
FREQUENT LIGHTNING.

LESZCYNSKI

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 8:18 AM MDT	Severe Thunderstorm Warning	BOU	Boulder, Jefferson	27 min
Apr 25, 8:18 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver	27 min
Apr 25, 8:32 AM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	28 min
Apr 25, 8:49 AM MDT	Severe Thunderstorm Warning	BOU	Adams, Denver, Jefferson	41 min
Apr 25, 8:49 AM MDT	Severe Thunderstorm Warning	BOU	Boulder, Weld	41 min
Apr 25, 9:03 AM MDT	Severe Thunderstorm Warning	BOU	Larimer, Weld	42 min
Apr 25, 1:47 PM MDT	Severe Thunderstorm Warning	BOU	Arapahoe, Washington	43 min
Apr 25, 2:20 PM MDT	Tornado Warning	BOU	Washington	25 min
Apr 25, 2:45 PM MDT	Severe Thunderstorm Warning	BOU	Washington	25 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1994 Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive.