Alert archive / Colorado / Tornado Warnings in 1988

Tornado Warning 7, NWS Denver/Boulder, CO

June 10, 1988Arapahoe County, Douglas County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 10, 1988, 3:50 PM MDT for Arapahoe County, Douglas County, Colorado. It was in force for 30 min.

The area

The counties it named.

The facts

Issued
Jun 10, 1988, 3:50 PM MDT (21:50 UTC)
Expired
Jun 10, 1988, 4:20 PM MDT
In force
30 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties

Counties Arapahoe County, CO, Douglas 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, 9.8 hours before the alert went out and 127 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-pSkew-T log-p diagram, Denver, CO at 12:00Z on 1988-06-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 1988-06-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1981 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
6 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 102153
TORDEN
COC005-035-102220-
 
BULLETIN...EBS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
350 PM MDT FRI JUN 10 1988
 
THE NATIONAL WEATHER SERVICE HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 420 PM  MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES OF NORTHEAST COLORADO:
 
     WESTERN ARAPAHOE
     NORTHERN DOUGLAS
 
INCLUDING THE FOLLOWING TOWNS/CITIES:
 
     PARKER AND SEDALIA
 
A LINE OF DEVELOPING STORMS ARE LOCATED 4 MILES NORTH OF PARKER..AND
17 MILES SOUTHEAST OF DENVER.
 
AT 350 PM RADAR INDICATED A STRONG LINE OF STORMS WAS FORMING AND
TORNADO DEVELOPMENT SEEMS VERY LIKELY. NUMEROUS FUNNEL CLOUDS HAVE BEEN
SIGHTED AND THESE STORMS ARE INTENSIFYING. 

IN HOMES GO TO THE BASEMENT OR INTO A CLOSET OR BATHROOM.
IN SCHOOLS..HIGH RISES AND HOSPITALS GO TO AN INTERIOR
HALLWAY ON THE LOWEST FLOOR.  IF IN MOBILE HOMES OR VEHICLES..
EVACUATE THEM AND GO TO A SUBSTANTIAL SHELTER.  IF NO SHELTER
IS AVAILABLE..LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT.
IN ALL CASES..STAY AWAY FROM WINDOWS..DOORS AND OUTSIDE WALLS.
 
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR MOST OF EASTERN
COLORADO UNTIL 9 PM.

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  3974 10468 3975 10450 3936 10489 39.38 10510

What forecasters said that day

The local office's own words before this tornado 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 10, 11:37 AM MDT, 4 hours 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1140AM MDT FRI JUN 10 1988

...THUNDERSTORMS AGAIN...BUT NOT LIKE THURSDAY...

AFTERNOON THUNDERSTORMS WILL OCCUR AGAIN TODAY IN EASTERN COLORADO...
PARTICULARLY NEAR THE FRONT RANGE...BUT THESE ARE NOT FORECAST TO BE
AS WIDESPREAD OR HEAVY AS THOSE OF THURSDAY. HEAVY RAIN MAY FALL IN A
FEW PLACES BUT SHOULD PRESENT PROBLEMS ONLY IN LOW LYING AREAS AND
ALONG SOME ROADWAYS.

THE POSSIBILITY EXISTS FOR A FEW SEVERE THUNDERSTORMS...WITH LARGE
HAIL AND STRONG WINDS. STORMS WILL BE MOVING MORE RAPIDLY THAN
THOSE OF THURSDAY.

DRYING CONDITIONS SHOULD SIGNIFICANTLY LESSEN CHANCES FOR SEVERE
THUNDERSTORMS AND HEAVY RAIN NEAR THE FRONT RANGE ON SATURDAY.

TUNNELL
Special weather statement, Jun 10, 3:48 PM MDT, 2 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
350PM MDT FRI JUN 10 1988

        ...THUNDERSTORMS LIKELY IN NEXT 1 TO 2 HOURS....

THUNDERSTORMS ARE LIKELY TO FORM IN THE NEXT 1 TO 2 HOURS ON A LINE FROM
NORTHERN DOUGLAS COUNTY THROUGH AURORA AND NORTHEAST INTO NORTHEAST
DENVER. THE STORMS MAY BECOME SEVERE WITH LARGE HAIL...HEAVY RAINS AND
DAMAGING WINDS TO 50 MPH. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR
THESE AREAS UNTIL 9 PM. THE STORMS WILL FORM AND THEN MOVE SLOWLY EAST
INTO AREAS NEAR THE TOWNS OF WATKINS...BENNET AND ELBERT.  PERSONS
TRAVELLING ON INTERSTATE 70 EAST OF DENVER SHOULD PREPARE FOR STRONG
STORMS.

 THESE STORMS ARE CAUSED BY COOL AIR FROM SHOWERS O(VER THE FOOTHILLS IS
NOW RUSHING THROUGH DENVER WITH GUSTY NORTHWEST WINDS AND LOWER
TEMPERATURES. THIS AIR WILL MEET WARM MOIST AIR ON THE PLAINS AND THE
RESULT WILL BE THUNDERST

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 10, 4:18 PM MDTTornado WarningBOUArapahoe, Douglas32 min
Jun 10, 4:18 PM MDTTornado WarningBOUAdams32 min

Nearby

Tornado Warnings in Colorado, 1988Every tornado warning in 1988Tornadoes 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.