Alert archive / Colorado / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 75, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this severe thunderstorm warning at Jun 23, 1997, 5:28 PM MDT for Boulder 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 counties it named.
The facts
- Issued
- Jun 23, 1997, 5:28 PM MDT (23:28 UTC)
- Expired
- Jun 23, 1997, 6:15 PM MDT
- In force
- 47 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Boulder County, CO
The radar
The Denver radar (KFTG), 77 km from the middle of the area, began a volume at 23:30 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
Fort Carson/Butt, CO (KFCS), launched 12:00Z, 11.5 hours before the alert went out and 167 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
- 294 J/kg
- Mixed-layer CIN
- -393 J/kg
- Mixed-layer LCL
- 1570 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What 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, Jun 23, 4:43 PM MDT, 45 minutes before
COZ036-040-041-232315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 443 PM MDT MON JUN 23 1997 ...NUMEROUS FUNNEL CLOUDS REPORTED IN DOUGLAS COUNTY... AT 440 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES WEST OF CASTLE ROCK...OR ABOUT 25 MILES SOUTH OF DENVER. AT 435 PM MDT AMATEUR RADIO WEATHER SPOTTERS AND THE PUBLIC REPORTED NUMEROUS SMALL FUNNEL CLOUDS WITH THIS THUNDERSTORM. DOPPLER RADAR ALSO INDICATED POSSIBLE STRONG DOWNBURST WINDS WITH THIS STORM. THE STORM WAS MOVING NORTHEAST AT 10 MILES PER HOUR AND IS EXPECTED TO STRENGTHEN DURING THE NEXT 30 MINUTES. PERSONS IN OR NEAR BEVERLY HILLS...CASTLE ROCK...HIGHLANDS RANCH... LOUVIERS...PARKER...ROXBOROUGH PARK...SEDALIA...SOUTH PLATTE... SPRUCEWOOD...SURREY RIDGE AND THE PINERY SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND WIND GUSTS TO 50 MPH MAY OCCUR WITH THIS STORM. BAKER
Special weather statement, Jun 23, 4:44 PM MDT, 44 minutes before
COZ036-040-041-232315- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 443 PM MDT MON JUN 23 1997 ...NUMEROUS FUNNEL CLOUDS REPORTED IN DOUGLAS COUNTY... AT 440 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 4 MILES WEST OF CASTLE ROCK...OR ABOUT 25 MILES SOUTH OF DENVER. AT 435 PM MDT AMATEUR RADIO WEATHER SPOTTERS AND THE PUBLIC REPORTED NUMEROUS SMALL FUNNEL CLOUDS WITH THIS THUNDERSTORM. DOPPLER RADAR ALSO INDICATED POSSIBLE STRONG DOWNBURST WINDS WITH THIS STORM. THE STORM WAS MOVING NORTHEAST AT 10 MILES PER HOUR AND IS EXPECTED TO STRENGTHEN DURING THE NEXT 30 MINUTES. PERSONS IN OR NEAR BEVERLY HILLS...CASTLE ROCK...HIGHLANDS RANCH... LOUVIERS...PARKER...ROXBOROUGH PARK...SEDALIA...SOUTH PLATTE... SPRUCEWOOD...SURREY RIDGE AND THE PINERY SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND WIND GUSTS TO 50 MPH MAY OCCUR WITH THIS STORM. BAKER
Special weather statement, Jun 23, 5:04 PM MDT, 24 minutes before
COZ041-045-046-240000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 504 PM MDT MON JUN 23 1997 ...STRONG THUNDERSTORM IN EASTERN ARAPAHOE AND NORTHERN ELBERT COUNTIES... AT 454 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 15 MILES SOUTHWEST OF AGATE...OR ABOUT 26 MILES WEST OF LIMON. THE STORM WAS MOVING NORTHEAST AT 10 MILES PER HOUR. ALL PERSONS IN OR NEAR AGATE AND DEER TRAIL SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS STORM UNTIL 600 PM MDT THIS EVENING. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. GARD...WSFO DENVER
Special weather statement, Jun 23, 5:07 PM MDT, 21 minutes before
COZ041-045-046-240000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 504 PM MDT MON JUN 23 1997 ...STRONG THUNDERSTORM IN EASTERN ARAPAHOE AND NORTHERN ELBERT COUNTIES... AT 454 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 15 MILES SOUTHWEST OF AGATE...OR ABOUT 26 MILES WEST OF LIMON. THE STORM WAS MOVING NORTHEAST AT 10 MILES PER HOUR. ALL PERSONS IN OR NEAR AGATE AND DEER TRAIL SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...BRIEF HEAVY RAIN...AND GUSTY WINDS WILL OCCUR WITH THIS STORM UNTIL 600 PM MDT THIS EVENING. INTENSE LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. GARD...WSFO DENVER
Special weather statement, Jun 23, 5:20 PM MDT, 8 minutes before
COZ040-240000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 520 PM MDT MON JUN 23 1997 ...STRONG THUNDERSTORMS MOVING INTO SOUTHERN PORTIONS OF THE DENVER METRO AREA... AT 515 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS OVER NORTHWEST DOUGLAS AND SOUTHWEST ARAPAHOE COUNTIES. THE STRONGEST THUNDERSTORM WAS LOCATED OVER HIGHLANDS RANCH...OR ABOUT 13 MILES SOUTH OF DENVER. THE STORM WAS MOVING NORTH AT 20 MILES PER HOUR TAKING IT ACROSS THE DENVER METRO AREA BETWEEN 520 PM AND 615 PM MDT. THIS STORM HAS HAD A HISTORY OF PRODUCING FUNNEL CLOUDS. PERSONS IN OR NEAR ARVADA DENVER...ENGLEWOOD...LAKEWOOD...LITTLETON... WHEAT RIDGE...ARAPAHOE PARK...BEVERLY HILLS...CHATFIELD RESERVOIR... GREENWOOD VILLAGE...HIGHLANDS RANCH...LOUVIERS...PARKER...SHERIDAN... AND SURREY RIDGE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...HAIL...BRIEF HEAVY RAIN...AND WIND GUSTS TO 50 MILES PER HOUR WILL OCCUR WITH THIS STORM. INTENSE CLOUD-TO-GROUND LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. BAKER
Special weather statement, Jun 23, 5:23 PM MDT, 5 minutes before
COZ040-240000- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 520 PM MDT MON JUN 23 1997 ...STRONG THUNDERSTORMS MOVING INTO SOUTHERN PORTIONS OF THE DENVER METRO AREA... AT 515 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS OVER NORTHWEST DOUGLAS AND SOUTHWEST ARAPAHOE COUNTIES. THE STRONGEST THUNDERSTORM WAS LOCATED OVER HIGHLANDS RANCH...OR ABOUT 13 MILES SOUTH OF DENVER. THE STORM WAS MOVING NORTH AT 20 MILES PER HOUR TAKING IT ACROSS THE DENVER METRO AREA BETWEEN 520 PM AND 615 PM MDT. THIS STORM HAS HAD A HISTORY OF PRODUCING FUNNEL CLOUDS. PERSONS IN OR NEAR ARVADA DENVER...ENGLEWOOD...LAKEWOOD...LITTLETON... WHEAT RIDGE...ARAPAHOE PARK...BEVERLY HILLS...CHATFIELD RESERVOIR... GREENWOOD VILLAGE...HIGHLANDS RANCH...LOUVIERS...PARKER...SHERIDAN... AND SURREY RIDGE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...HAIL...BRIEF HEAVY RAIN...AND WIND GUSTS TO 50 MILES PER HOUR WILL OCCUR WITH THIS STORM. INTENSE CLOUD-TO-GROUND LIGHTNING IS REPORTED WITH THIS STORM. IF OUTDOORS...STAY AWAY FROM ISOLATED HIGH OBJECTS SUCH AS TREES. MOVE INDOORS IF POSSIBLE. WHEN INDOORS...STAY AWAY FROM WINDOWS AND DOORS AND AVOID USING TELEPHONES UNLESS IT IS AN EMERGENCY. TRY TO UNPLUG UNNECESSARY ELECTRICAL APPLIANCES BEFORE THE THUNDERSTORM APPROACHES. BAKER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 22, 7:15 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 45 min |
| Jun 23, 5:28 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Jefferson | 47 min |
| Jun 23, 5:28 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 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.