Alert archive / Colorado / Tornado Warnings in 1997

Tornado Warning 7, NWS Denver/Boulder, CO

June 7, 1997Adams County, Arapahoe County, Denver County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 7, 1997, 3:05 PM MDT for Adams County, Arapahoe County, Denver County, Colorado. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 7, 1997, 3:05 PM MDT (21:05 UTC)
Expired
Jun 7, 1997, 3:35 PM MDT
In force
30 min
Issued by
NWS Denver/Boulder, CO
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Adams County, CO, Arapahoe County, CO, Denver County, CO

The radar

The Denver radar (KFTG), 32 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 144 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 1997-06-07Temperature 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 1997-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -73 square meters per square second.193958Sfc1 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
1435 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-73 m²/s²
0-3 km storm-relative helicity
-74 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 072109 RRA
TORDEN
COC001-005-031-072135-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE DENVER CO
305 PM MDT SAT JUN 7 1997

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 335 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES

IN NORTHEAST COLORADO
     NORTHWESTERN ARAPAHOE...DENVER AND SOUTHWESTERN ADAMS

INCLUDING THE FOLLOWING LOCATIONS
     WESTERN AURORA...COMMERCE CITY...DENVER...ENGLEWOOD...
     NORTHEASTERN LITTLETON...SOUTH CENTRAL THORNTON...SOUTH CENTRAL
     WESTMINSTER AND GREENWOOD VILLAGE

AT 300 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
THUNDERSTORM WITH A POSSIBLE TORNADO OVER CENTRAL DENVER. SEVERAL 
REPORTS OF FUNNEL CLOUDS HAVE BEEN SIGHTED.

THE STORM WAS MOVING NORTH AT 25 MILES PER HOUR.

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTE:R ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

ENTREKIN

LAT...LON 3966 10480 3959 10501 3983 10506 3988 10487

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 3:36 PM MDTTornado WarningBOUAdams29 min

Nearby

Tornado Warnings in Colorado, 1997Every tornado warning in 1997Tornadoes in 1997

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.