Alert archive / Colorado / Severe Thunderstorm Warnings in 1992

Severe Thunderstorm Warning 77, NWS Denver/Boulder, CO

July 1, 1992Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jul 1, 1992, 6:35 PM MDT for Weld County, Colorado. It was in force for 20 min.

The area

The counties it named.

The facts

Issued: Jul 1, 1992, 6:35 PM MDT (00:35 UTC)
Expired: Jul 1, 1992, 6:55 PM MDT
In force: 20 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Weld County, CO

The nearest sounding before it

Denver, CO (KDEN), launched 00:00Z, 0.6 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: 620 J/kg
Mixed-layer CIN: -65 J/kg
Mixed-layer LCL: 1005 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 411 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KDEN 020037
SVRDEN
COC087-123-020115-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
635 PM MDT WED JUL 01 1992

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 715 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN NORTHEASTERN COLORADO
     WESTERN MORGAN AND SOUTH CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     WELDONA AND WIGGINS

AT 635 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 11 MILES SOUTHWEST OF WIGGINS ...OR ABOUT
37 MILES SOUTHEAST OF GREELEY.

THE STORM WAS MOVING 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.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO
ADVANCE WARNING.  PREPARE TO MOVE TO A PLACE OF SAFETY IN A
STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A
TORNADO IS SPOTTED.

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

LESZCYNSKI
LAT...LON 4006 10393 4003 10419 4014 10424 4045 10388
          4038 10381

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, Jul 1, 5:06 PM MDT, 1 hour 29 minutes before

COZ011-012-020000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
510 PM MDT WED JUL 01 1992

...STRONG THUNDERSTORM SOUTHEAST OF PLATTEVILLE...

AT 5 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG
AND RAPIDLY DEVELOPING THUNDERSTORM SOUTHEAST OF PLATTEVILLE OR ABOUT 30
MILES SOUTHEAST OF FORT COLLINS.  THE STORM WAS MOVING TO THE EAST AT
ABOUT 10 MPH.

HAIL...STRONG WINDS AND VERY HEAVY RAIN WILL ACCOMPANY THIS STORM AS IT
MOVES ACROSS SOUTH CENTRAL WELD COUNTY NORTH OF HUDSON OVER THE NEXT 30
MINUTES.

MOVE TO A PLACE OF SAFETY IF THREATENING WEATHER APPROACHES.

ET

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 6:04 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	36 min
Jul 1, 6:35 PM MDT	Severe Thunderstorm Warning	BOU	Morgan	40 min
Jul 1, 7:03 PM MDT	Tornado Warning	BOU	Washington	42 min
Jul 1, 7:39 PM MDT	Tornado Warning	BOU	Washington	51 min
Jul 1, 8:24 PM MDT	Severe Thunderstorm Warning	BOU	Yuma	51 min
Jul 1, 9:13 PM MDT	Severe Thunderstorm Warning	BOU	Yuma	47 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1992 Every severe thunderstorm warning in 1992

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.