Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 112, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 2, 1997, 1:59 PM MDT for Douglas County, Elbert County, Colorado. It was in force for 31 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
- Aug 2, 1997, 1:59 PM MDT (19:59 UTC)
- Expired
- Aug 2, 1997, 2:30 PM MDT
- In force
- 31 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Douglas County, CO, Elbert County, CO
The radar
The Denver radar (KFTG), 58 km from the middle of the area, began a volume at 20:02 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, 8.0 hours before the alert went out and 139 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.
- Mixed-layer CAPE
- 126 J/kg
- Mixed-layer CIN
- -185 J/kg
- Mixed-layer LCL
- 1709 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 022000 RRA
SVRDEN
COC035-039-022030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
159 PM MDT SAT AUG 2 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 230 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
EASTERN DOUGLAS
IN EAST CENTRAL COLORADO
WEST CENTRAL ELBERT
INCLUDING THE FOLLOWING LOCATIONS
CASTLE ROCK...ELBERT...ELIZABETH...FRANKTOWN...PONDEROSA PARK
AND THE PINERY
AT 159 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 4 MILES SOUTH OF FRANKTOWN...OR ABOUT 32 MILES
SOUTH OF DENVER.
THE STORM WAS MOVING SOUTHEAST AT 10 MILES PER HOUR.
VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.
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.
REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMEPNT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
TA
LAT...LON 3920 10446 3915 10473 3932 10494 3951 10472What 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, Aug 2, 10:46 AM MDT, 3 hours 13 minutes before
COZ030-032>050-030600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1045 AM MDT SATURDAY AUG 2 1997 THIS OUTLOOK PERTAINS TO THE FOLLOWING COLORADO COUNTIES ADAMS ARAPAHOE BOULDER CLEAR CREEK DENVER DOUGLAS ELBERT GILPIN GRAND JACKSON JEFFERSON LARIMER LINCOLN LOGAN MORGAN PARK PHILLIPS SEDGWICK SUMMIT WASHINGTON WELD SYNOPSIS...A STREAM OF MONSOONAL MOISTURE FROM MEXICO AND THE GULF OF MEXICO HAS MOVED BACK OVER COLORADO TODAY. WHILE THE TOTAL AMOUNT OF MOISTURE IN THE AIR MASS IS CONSIDERABLY LESS THAN IT WAS EARLIER IN THE WEEK THE THREAT OF LOCALLY HEAVY THUNDERSTORM RAIN WILL CONTINUE THROUGH THIS AFTERNOON AND EVENING. SCATTERED SHOWERS AND THUNDERSTORMS WILL FORM OVER THE MOUNTAINS AND HIGHER TERRAIN DURING THE EARLY AFTERNOON AND SPREAD OVER THE NORTHEASTERN PLAINS OF COLORADO INTO THE EVENING. RAINFALL AMOUNTS UP TO 2.00 INCHES AN HOUR ARE POSSIBLE. THIS AMOUNT OF RAIN MAY CAUSE LOCAL FLOODING OF SMALL STREAMS...ROADWAYS AND LOW LYING OR FLOOD PRONE AREAS. SPOTTER ACTIVATION WILL NOT BE REQUIRED. GARD...WSFO DENVER
Special weather statement, Aug 2, 1:54 PM MDT, 5 minutes before
COZ041-022030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 154 PM MDT SAT AUG 2 1997 ...THUNDERSTORM IN EAST CENTRAL DOUGLAS AND WEST CENTRAL ELBERT COUNTIES... AT 154 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER CASTLEWOOD CANYON...OR ABOUT 31 MILES SOUTH OF DENVER. THE STORM WAS MOVING SOUTHEAST AT 5 MILES PER HOUR. PERSONS IN OR NEAR CASTLE ROCK...ELBERT...ELIZABETH...FRANKTOWN AND PONDEROSA PARK SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL AND HEAVY RAIN WILL OCCUR WITH THIS STORM. TA
Special weather statement, Aug 2, 1:55 PM MDT, 4 minutes before
COZ041-022030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 154 PM MDT SAT AUG 2 1997 ...THUNDERSTORM IN EAST CENTRAL DOUGLAS AND WEST CENTRAL ELBERT COUNTIES... AT 154 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER CASTLEWOOD CANYON...OR ABOUT 31 MILES SOUTH OF DENVER. THE STORM WAS MOVING SOUTHEAST AT 5 MILES PER HOUR. PERSONS IN OR NEAR CASTLE ROCK...ELBERT...ELIZABETH...FRANKTOWN AND PONDE:ROSA PARK SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL AND HEAVY RAIN WILL OCCUR WITH THIS STORM. TA
Nearby
Severe Thunderstorm Warnings in Colorado, 1997Every severe thunderstorm warning 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.