Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 121, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Aug 16, 1997, 5:43 PM MDT for Adams County, Denver County, Colorado. It was in force for 47 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 16, 1997, 5:43 PM MDT (23:43 UTC)
- Expired
- Aug 16, 1997, 6:30 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Adams County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 13 km from the middle of the area, began a volume at 23:44 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, 11.7 hours before the alert went out and 115 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
- 49 J/kg
- Mixed-layer CIN
- -437 J/kg
- Mixed-layer LCL
- 1514 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
194
WUUS1 KDEN 162343
SVRDEN
COC001-031-123-170030-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DENVER CO
543 PM MDT SAT AUG 16 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SEVERE
THUNDERSTORM WARNING EFFECTIVE UNTIL 630 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES...
IN NORTHEAST COLORADO
NORTHEASTERN DENVER...WESTERN ADAMS AND SOUTH CENTRAL WELD
INCLUDING THE FOLLOWING LOCATIONS
DENVER INTERNATIONAL AIRPORT...NORTHEASTERN THORNTON...BARR
LAKE...BRIGHTON...HUDSON...KEENESBURG AND LOCHBUIE
AT 543 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM 5 MILES NORTH OF DENVER INTERNATIONAL AIRPORT...
OR ABOUT 20 MILES NORTHEAST OF DENVER.
THE STORM WAS MOVING EAST AT 25 MILES PER HOUR.
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 ENFORCEMENT AGENCY. THEY
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST
OFFICE IN DENVER.
LAT...LON 3980 10430 3980 10486 3998 10495 4014 10445
FMCWhat 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 16, 4:35 PM MDT, 1 hour 8 minutes before
COZ035-036-038-039-040-043-162330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 435 PM MDT SAT AUG 16 1997 ...SCATTERED THUNDERSTORMS DEVELOPING IN THE FOOTHILLS LATE THIS AFTERNOON... AT 430 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES EAST OF BOULDER...OR ABOUT 24 MILES NORTHWEST OF DENVER. THE STORM WAS MOVING SOUTHEAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR ARVADA...BOULDER...BROOMFIELD...LONGMONT... ELDORADO SPRINGS...ERIE...JAMESTOWN...LAFAYETTE...LOUISVILLE...NIWOT ...ROCKY FLATS AND SUPERIOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...LOCALLY HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS STORM. RADAR INDICATED THIS STORM HAD PRODUCED UP TO 1 INCH OF RAINFALL IN THE LAST HOUR. ELSEWHERE SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THE FOOTHILLS LATE THIS AFTERNOON AND DRIFT INTO THE URBAN CORRIDOR. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. FMC
Special weather statement, Aug 16, 4:37 PM MDT, 1 hour 6 minutes before
COZ035-036-038-039-040-043-162330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 435 PM MDT SAT AUG 16 1997 ...SCATTERED THUNDERSTORMS DEVELOPING IN THE FOOTHILLS LATE THIS AFTERNOON... AT 430 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES EAST OF BOULDER...OR ABOUT 24 MILES NORTHWEST OF DENVER. THE STORM WAS MOVING SOUTHEAST AT 15 MILES PER HOUR. PERSONS IN OR NEAR ARVADA...BOULDER...BROOMFIELD...LONGMONT... ELDORADO SPRINGS...ERIE...JAMESTOWN...LAFAYETTE...LOUISVILLE...NIWOT ...ROCKY FLATS AND SUPERIOR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...LOCALLY HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS STORM. RADAR INDICATED THIS STORM HAD PRODUCED UP TO 1 INCH OF RAINFALL IN THE LAST HOUR. ELSEWHERE SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP OVER THE FOOTHILLS LATE THIS AFTERNOON AND DRIFT INTO THE URBAN CORRIDOR. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...ZTHEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. FMC
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 5:43 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 47 min |
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.