Alert archive / Colorado / Severe Thunderstorm Warnings in 1988

Severe Thunderstorm Warning 13, NWS Denver/Boulder, CO

June 12, 1988Larimer County, Colorado

NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 12, 1988, 4:54 PM MDT for Larimer County, Colorado. It was in force for 41 min.

The area

The counties it named.

The facts

Issued: Jun 12, 1988, 4:54 PM MDT (22:54 UTC)
Expired: Jun 12, 1988, 5:35 PM MDT
In force: 41 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties

County Larimer County, CO

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Denver, CO (KDEN), launched 12:00Z, 10.9 hours before the alert went out and 209 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: 1820 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 10 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 122257
SVRDEN
COC069-122335-
 
BULLETIN...IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
454 PM MDT SUN JUN 12 1988
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM
WARNING EFFECTIVE UNTIL 535 PM  MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES OF NORTHEAST COLORADO:
 
     SOUTHEASTERN LARIMER
 
INCLUDING THE FOLLOWING TOWNS/CITIES:
 
     DRAKE AND POUDRE PARK AND THE WESTERN PARTS OF FORT COLLINS
 
THE STORM IS LOCATED 5 MILES NORTHEAST OF DRAKE..AND 12 MILES
SOUTHWEST OF FT COLLINS OVER THE FOOTHILLS AND MOVING SLOWLY NORTHEAST.
 
AT 455PM RADAR INDICATED THIS STORM LIKELY HAD LARGE HAIL.
 
IF SEVERE WEATHER APPROACHES YOUR AREA..GO TO A STURDY
SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD PRONE AREAS.
REMEMBER..A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING
HAIL..DAMAGING WINDS OF OVER 60 MPH..DEADLY LIGHTNING..AND
HEAVY RAINS THAT CAN QUICKLY FLOOD A LOW LYING AREA.
 
 
TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT
AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE OFFICE
IN DENVER..OR CALL YOUR REPORT TO THE NATIONAL WEATHER SERVICE
AT 361-0663.  DO NOT CALL THIS NUMBER FOR INFORMATION.
 
DUNN
 
LAT..LON  4070 10537 4069 10512 4043 10511 4041 10540

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, Jun 12, 4:28 PM MDT, 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
430PM MDT SUN JUN 12 1988

     ...STRONG THUNDERSTORMS FORMING IN SOUTHEAST COLORADO...

STRONG THUNDERSTORMS ARE INDICATED BY RADAR IN THE SOUTHEAST CORNER OF
COLORADO OVER BACA...PROWERS AND BENT COUNTIES. THESE STORMS ARE MOVING
NORTH. LOCALLY HEAVY RAIN...WIND GUSTS TO 45 MPH AND SMALL HAIL ARE
LIKELY WITH THESE STORMS. MORE STORMS ARE EXPECTED TO FORM OVER THE AREA
IN THE NEXT FEcW HOURS.  IF THREATENING WEATHER APPROACHES BE PREPARED TO
SEEK SHELTER.

DUNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 12, 2:16 PM MDT	Severe Thunderstorm Warning	BOU	Larimer	39 min

Nearby

Severe Thunderstorm Warnings in Colorado, 1988 Every severe thunderstorm warning in 1988

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.