Alert archive / Colorado / Tornado Warnings in 1997

Tornado Warning 8, NWS Denver/Boulder, CO

June 7, 1997Adams County, Colorado

NWS Denver/Boulder, CO issued this tornado warning at Jun 7, 1997, 3:36 PM MDT for Adams County, Colorado. It was in force for 29 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, 3:36 PM MDT (21:36 UTC)
Expired: Jun 7, 1997, 4:05 PM MDT
In force: 29 min
Issued by: NWS Denver/Boulder, CO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Adams County, CO

The radar

The Denver radar (KFTG), 30 km from the middle of the area, began a volume at 21:36 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, 9.6 hours before the alert went out and 140 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: 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 072141 RRA
TORDEN
COC001-072205-

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

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A TORNADO WARNING
EFFECTIVE UNTIL 405 PM MDT FOR PEOPLE IN THE FOLLOWING COUNTIES

IN NORTHEAST COLORADO
     NORTHWESTERN ADAMS

INCLUDING THE FOLLOWING LOCATIONS
     EASTERN COMMERCE CITY...NORTHGLENN...THORNTON...NORTHEASTERN
     WESTMINSTER AND BRIGHTON

AT 330 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
THUNDERSTORM WITH A POSSIBLE TORNADO 2 MILES NORTHEAST OF COMMERCE
CITY...OR ABOUT 7 MILES NORTHEAST OF DENVER.

WEATHER SPOTTERS HAVE REPORTED FUNNEL CLOUDS WITH THIS STORM. VERY 
HEAVY RAIN...AND STREET FLOODING ARE POSSIBLE WITH THIS STORM.

THE STORM WAS MOVING NORTH AT 20 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 SHELTER 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.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

ENTREKIN

LAT...LON 3988 10477 3982 10483 3977 10492 3992 10501
          3999 10493 3999 10483

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 7, 3:05 PM MDT	Tornado Warning	BOU	Adams, Arapahoe, Denver	30 min

Nearby

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