Alert archive / Colorado / Severe Thunderstorm Warnings in 1995

Severe Thunderstorm Warning 11, NWS Denver/Boulder, CO

May 12, 1995Adams County, Weld County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at May 12, 1995, 6:19 PM MDT for Adams County, Weld County, Colorado. It was in force for 41 min.

The area

The counties it named.

The facts

Issued: May 12, 1995, 6:19 PM MDT (00:19 UTC)
Expired: May 12, 1995, 7:00 PM MDT
In force: 41 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

Counties Adams County, CO, Weld County, CO

The nearest sounding before it

Denver, CO (KDNR), launched 00:00Z, 0.3 hours before the alert went out and 104 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: 299 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1979 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: 93 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KDEN 130021
SVRDEN
COC001-123-130100-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
619 PM MDT FRI MAY 12 1995

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 700 PM MDT FOR PEOPLE IN
THE FOLLOWING COUNTIES

IN NORTHEASTERN COLORADO
     NORTH CENTRAL ADAMS AND SOUTH CENTRAL WELD

INCLUDING THE FOLLOWING LOCATIONS
     KEENESBURG...PROSPECT VALLEY AND ROGGEN

AT 619 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A SEVERE THUNDERSTORM 7 MILES SOUTH OF KEENESBURG ...OR ABOUT
32 MILES SOUTH OF GREELEY.

THE STORM WAS MOVING TO THE EAST AT 25 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.

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

GARD...WSFO DENVER
LAT...LON 3995 10416 3996 10457 4018 10461 4019 10418

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, May 12, 3:53 PM MDT, 2 hours 26 minutes before

COZ031-035-038-042-122245-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
350 PM MDT FRI MAY 12 1995

AT 347 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A STRONG THUNDERSTORM 6 MILES NORTH OF TEDS PLACE ...OR ABOUT 12 MILES
NORTH OF FORT COLLINS.  OTHER STRONG THUNDERSTORMS WERE LOCATED OVER
NORTHEASTERN LARIMER AND NORTHWESTERN WELD COUNTIES.  HAIL 1/2 INCHES
IN DIAMETER WAS REPORTED FROM THESE STORMS IN FORT COLLINS.  THE STORMS
ARE MOVING TO THE NORTHEAST AT 25 MPH.

ALL PEOPLE IN NORTHEASTERN LARIMER AND NORTHWESTERN WELD COUNTIES
OF COLORADO INCLUDING THE FOLLOWING LOCATIONS
     BELLVUE...CARR...FORT COLLINS...LIVERMORE...NATURAL FORT
     REST AREA...NUNN...ROCKPORT...TEDS PLACE...VIRGINIA DALE
     AND WELLINGTON
SHOULD BE ALERT FOR SMALL HAIL...STRONG GUSTY WINDS...BRIEF HEAVY
RAIN AND FREQUENT DANGEROUS LIGHTNING FROM THESE STORMS UNTIL 445 PM MDT
THIS AFTERNOON.

GARD...WSFO DENVER
LAT...LON 4068 10455 4059 10516 4099 10552 4099 10447

Special weather statement, May 12, 4:13 PM MDT, 2 hours 6 minutes before

COZ041-045>046-049-122315-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
410 PM MDT FRI MAY 12 1995

...STRONG THUNDERSTORMS EAST OF DENVER...

AT 408 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
A STRONG THUNDERSTORM 9 MILES SOUTHEAST OF COUNTRY GARDENS ...OR ABOUT
37 MILES NORTHWEST OF LIMON.  THIS STORM WAS MOVING TO THE NORTHEAST AT
25 MPH.

ALL PEOPLE IN EASTERN ARAPAHOE...EASTERN ADAMS AND EXTREME SOUTHWESTTERN
WASHINGTON COUNTIES OF COLORADO INCLUDING THE TOWNS OF
     BYERS...COUNTRY GARDENS...DEER TRAIL...JOLLY RANCH...LAST
     CHANCE...SHAMROCK AND STRASBURG
SHOULD BE ALERT FOR HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND
FREQUENT DANGEROUS LIGHTNING FROM THIS STORM UNTIL 515 PM MDT THIS
AFTERNOON.

GARD...WSFO DENVER
LAT...LON 3964 10347 3947 10419 3969 10440 4001 10374

Special weather statement, May 12, 4:38 PM MDT, 1 hour 41 minutes before

COZ042>043-122330-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
435 PM MDT FRI MAY 12 1995

...STRONG THUNDERSTORM NEAR GREELEY...

AT 433 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG
THUNDERSTORM OVER PIERCE...OR ABOUT 13 MILES NORTH OF GREELEY.  THE
STORM WAS MOVING TO THE EAST AT 30 MPH.

ALL PEOPLE IN CENTRAL WELD COUNTY COLORADO INCLUDING THE FOLLOWING
TOWNS...
     AULT...BARNESVILLE...BRIGGSDALE...EATON...GALETON...GILL...
     GREELEY...KERSEY...LUCERNE...NUNN...PIERCE...PURCELL AND
     RIVERSIDE RESERVOIR
SHOULD BE ALERT FOR HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND
FREQUENT DANGEROUS LIGHTNING UNTIL 530 PM MDT THIS AFTERNOON.

GARD...WSFO DENVER
LAT...LON 4030 10418 4041 10471 4052 10483 4065 10485
          4076 10476 4073 10410

Special weather statement, May 12, 5:05 PM MDT, 1 hour 14 minutes before

COZ046-130000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
500 PM MDT FRI MAY 12 1995

...STRONG THUNDERSTORMS AROUND LIMON...

AT 500 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS 15 MILES NORTH AND 13 MILES EAST OF LIMON COLORADO.
THESE STORMS WERE MOVING TO THE EAST AT 25 MPH.

ALL PEOPLE IN NORTHERN LINCOLN COUNTY COLORADO INCLUDING THE FOLLOWING
TOWNS...LIMON...SHAW...ARRIBA...GENOA...HUGO AND BOVINA SHOULD BE ALERT
FOR HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND FREQUENT DANGEROUS
LIGHTNING FROM THESE STORMS UNTIL 600 PM MDT THIS AFTERNOON.

GARD...WSFO DENVER
LAT...LON 4030 10418 4041 10471 4052 10483 4065 10485
          4076 10476 4073 10410

Special weather statement, May 12, 5:18 PM MDT, 1 hour 1 minute before

COZ042-043-044-130015

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
515 PM MDT FRI MAY 12 1995

...STRONG THUNDERSTORMS NEAR GREELEY...

AT 510 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS NEAR BRACEWELL COLORADO...6 MILES WEST OF GREELEY AND
NEAR CORNISH COLORADO...17 MILES NORTHEAST OF GREELEY.  THESE
STORMS WERE MOVING TO THE EAST AT 25 TO 30 MPH.

ALL PEOPLE IN CENTRAL WELD COUNTY AND NORTHEASTERN MORGAN
COUNTIES OF COLORADO INCLUDING THE FOLLOWING TOWNS...
     AULT...BARNESVILLE...BRIGGSDALE...EATON...EVANS...GALETON
     ...GARDEN CITY...GILL...GOODRICH...GREELEY...JACKSON
     RESERVOIR...KEOTA...KERSEY...LA SALLE...LUCERNE...ORCHARD
     ...PURCELL AND RIVERSIDE RESERVOIR
SHOULD BE ALERT FOR HAIL...STRONG GUSTY WINDS...BRIEF HEAVY RAIN AND
FREQUENT DANGEROUS LIGHTNING FROM THESE STORMS UNTIL 615 PM MDT THIS
EVENING.

GARD...WSFO DENVER

Special weather statement, May 12, 6:02 PM MDT, 17 minutes before

COZ040-042-043-044-045-130100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
600 PM MDT FRI MAY 12 1995

...STRONG THUNDERSTORMS NORTHEAST OF DENVER...

AT 550 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS OVER CENTRAL AND SOUTHERN WELD...NORTHERN MORGAN...AND
CENTRAL ADAMS COUNTIES OF COLORADO AND NEAR DENVER INTERNATIONAL
AIRPORT.  THE STRONGEST STORM WAS LOCATED NEAR HARDIN COLORADO...12
MILES SOUTHEAST OF GREELEY.  ANOTHER STRONG STORM WAS LOCATED NEAR
TONVILLE COLORADO...ABOUT 10 MILES NORTH OF DENVER INTERNATIONAL
AIRPORT.  THESE STORMS WERE MOVING TO THE EAST NORTHEAST AT 25
MPH.

ALL PEOPLE IN SOUTHERN AND CENTRAL WELD...MORGAN...AND CENTRAL AND
EASTERN ADAMS COUNTIES OF COLORADO SHOULD BE ALERT FOR HAIL...STRONG
GUSTY WINDS...BRIEF HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING FROM
THESE STORMS UNTIL 700 PM MDT THIS EVENING.

GARD...WSFO DENVER

The office that day

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

Issued	Product	Office	Counties	Lasted
May 12, 6:12 PM MDT	Severe Thunderstorm Warning	BOU	Weld	48 min
May 12, 6:43 PM MDT	Tornado Warning	BOU	Arapahoe, Douglas	32 min
May 12, 7:00 PM MDT	Severe Thunderstorm Warning	BOU	Adams, Morgan, Washington	45 min
May 12, 7:47 PM MDT	Severe Thunderstorm Warning	BOU	Washington	43 min
May 12, 8:12 PM MDT	Tornado Warning	BOU	Washington	18 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.