Alert archive / Colorado / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 2, NWS Denver/Boulder, CO

April 30, 1995Denver County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Apr 30, 1995, 5:10 PM MDT for Denver County, Colorado. It was in force for 35 min.

The area

The counties it named.

The facts

Issued: Apr 30, 1995, 5:10 PM MDT (23:10 UTC)
Expired: Apr 30, 1995, 5:45 PM MDT
In force: 35 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Denver County, CO

The radar

The Denver radar (KFTG), 28 km from the middle of the area, began a volume at 23:13 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, 11.2 hours before the alert went out and 141 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: 713 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 435 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 302311
SVRDEN
COC001-031-123-302345-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
510 PM MDT SUN APR 30 1995

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

IN NORTHEASTERN COLORADO
     WESTERN ADAMS...NORTHEASTERN DENVER AND EXTREME SOUTH
     CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     BARR LAKE...BRIGHTON...COMMERCE CITY...DENVER...DENVER
     INTL AIRPORT AND THORNTON

AT 508 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 3 MILES SOUTH OF BARR LAKE ...OR ABOUT 14
MILES NORTHEAST OF DENVER.

THE PUBLIC HAS REPORTED 1/4 TO 1/2 INCH HAIL WITH THIS STORM
ALREADY...AND THE STORM IS STILL INTENSIFYING OVER DENVER INTERNATIONAL
AIRPORT.

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.

ENTREKIN

LAT...LON 3977 10448 3979 10502 3996 10484 4005 10445

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 30, 4:27 PM MDT, 43 minutes before

COZ038-039-042-043-302330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
425 PM MDT SUNDAY APRIL 30 1995

...STRONG THUNDERSTORMS OVER THE NORTHERN FRONT RANGE COORIDOR...

AT 415 PM...DOPPLER RADAR INDICATED A LINE OF SHOWERS AND THUNDERSTORMS
IN ASSOCIATION WITH A COLD FRONT OVER NORTHWESTERN WELD COUNTY AND
STRETCHING SOUTHWESTWARD TO SOUTHEASTERN BOULDER COUNTY. THE STORMS
ARE PRODUCING HEAVY RAIN..SMALL HAIL AND STRONG GUSTY NORTHWEST WINDS.
THE STRONGEST STORMS ARE NOW LOCATED OVER NORTH CENTRAL AND SOUTHWESTERN
WELD COUNTY.

PEA SIZED HAIL WAS REPORTED 4 MILES NORTHWEST OF GREELY...WHILE 1/4 INCH
HAIL FELL 3 MILES SOUTHWEST OF LOVELAND. THIS BAND OF STORMS IS
MOVINNG SOUTHEAST AT 30 MPH. THE FRONTAL BAND WILL MOVE INTO THE
REMAINDER OF WELD COUNTY BY 5 PM. IN ADDITION STRONG NORTHWEST WINDS OF
25 TO 35 MPH...WITH GUSTS TO 45 MPH ARE BLOWING OVER THE AREA BEHIND THE
FRONT.

ENTREKIN

Special weather statement, Apr 30, 4:54 PM MDT, 16 minutes before

COZ038-039-040-042-043-302330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
455 PM MDT SUNDAY APRIL 30 1995

...STRONG THUNDERSTORMS OVER WELD AND WESTERN ADAMS COUNTY...

AT 445 PM...DOPPLER RADAR INDICATED A LINE OF VERY HEAVY RAIN SHOWERS
AND SMALL HAIL OVER EASTERN WELD...AND STRETCHING SOUTHWESTWARD INTO
WESTERN ADAMS COUNTY. THESE STROMS ARE PRODUCING HEAVY
RAIN...HAIL AND STRONG NORTHWEST WINDS. THE STRONGEST STORMS ARE LOCATED
OVER NORTHWESTERN ADAMS COUNTY AND MOVING INTO THE THORTON AND
NORTHGLENN AREAS.

NUMEROUS REPORTS OF 1/4 TO 1/2 INCH HAIL HAVE BEEN REPORTED OVER
BROOMFIELD AND NOW MOVING INTO THORTON...WHERE STREETS IN SOME PLACES
ARE COVERED IN HAIL. THIS STORM IS MOVING RAPIDLY TO THE SOUTHEAST AND
WILL BE AFFECTING CENTRAL ADAMS...AND INCLUDING DENVER INTERNATIONAL
AIRPORT DURING THE NEXT HOUR.

ALL PERSONS IN THE VICINITY OF THESE STRONG STORMS SHOULD TAKE COVER
IMMEDIATELY.

ENTREKIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 5:10 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Weld	35 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1995 Every severe thunderstorm warning in 1995

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.