Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 34, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 30, 1997, 8:05 PM MDT for Arapahoe County, Denver County, Colorado. It was in force for 115 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
- Jul 30, 1997, 8:05 PM MDT (02:05 UTC)
- Expired
- Jul 30, 1997, 10:00 PM MDT
- In force
- 115 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Arapahoe County, CO, Denver County, CO
The radar
The Denver radar (KFTG), 10 km from the middle of the area, began a volume at 02:07 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 00:00Z, 2.1 hours before the alert went out and 119 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
- 312 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1001 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 flash flood 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, Jul 30, 3:20 PM MDT, 4 hours 45 minutes before
COZ034>036-3022120 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 320 PM MDT WED JUL 30 1997 ...THUNDERSTORMS IN CLEAR CREEK...GILPIN AND WESTERN BOULDER COUNTIES... AT 315 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS OVER CLEAR CREEK...GILPIN AND BOULDER COUNTIES. THE STRONGEST STORM WAS IN SOUTHWEST BOULDER COUNTY 4 MILES NORTH OF CRESCENT VILLAGE...OR ABOUT 24 MILES NORTHWEST OF DENVER. ANOTHER STRONG STORM WAS IN NORTHERN CLEAR CREEK COUNTY...5 MILES NORTHWEST OF IDAHO SPRINGS. THE STORMS WERE MOVING NORTHEAST AT 10 MILES PER HOUR AND ARE CAPABLE OF PRODUCING VERY HEAVY RAIN. PERSONS IN OR NEAR ASPEN SPRINGS...BLACK HAWK...CENTRAL CITY...DUMONT...ELDORA...IDAHO SPRINGS...NEDERLAND...PINECLIFFE AND ROLLINSVILLE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A FLASH FLOOD WATCH IS IN EFFECT FOR BOULDER...CLEAR CREEK AND GILPIN COUNTIES. BE ALERT FOR THE POSSIBILITY OF RAPIDLY RISING WATERS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY. LESZCYNSKI
Special weather statement, Jul 30, 3:21 PM MDT, 4 hours 44 minutes before
COZ034>036-3022120 SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 320 PM MDT WED JUL 30 1997 ...THUNDERSTORMS IN CLEAR CREEK...GILPIN AND WESTERN BOULDER COUNTIES... AT 315 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS OVER CLEAR CREEK...GILPIN AND BOULDER COUNTIES. THE STRONGEST STORM WAS IN SOUTHWEST BOULDER COUNTY 4 MILES NORTH OF CRESCENT VILLAGE...OR ABOUT 24 MILES NORTHWEST OF DENVER. ANOTHER STRONG STORM WAS IN NORTHERN CLEAR CREEK COUNTY...5 MILES NORTHWEST OF IDAHO SPRINGS. THE STORMS WERE MOVING NORTHEAST AT 10 MILES PER HOUR AND ARE CAPABLE OF PRODUCING VERY HEAVY RAIN. PERSONS IN OR NEAR ASPEN SPRINGS...BLACK HAWK...CENTRAL CITY...DUMONT...ELDORA...IDAHO SPRINGS...NEDERLAND...PINECLIFFE AND ROLLINSVILLE SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. A FLASH FLOOD WATCH IS IN EFFECT FOR BOULDER...CLEAR CREEK AND GILPIN COUNTIES. BE ALERT FOR THE POSSIBILITY OF RAPIDLY RISING WATERS AND BE PREPARED TO MOVE TO A PLACE OF SAFETY. LESZCYNSKI
Special weather statement, Jul 30, 7:04 PM MDT, 1 hour 1 minute before
COZ043>045-310215- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 704 PM MDT WED JUL 30 1997 ...THUNDERSTORMS PRODUCING HEAVY RAIN MOVING INTO MORGAN COUNTY... AT 658 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS OVER EXTREME SOUTHWESTERN MORGAN COUNTY. THE STRONGEST THUNDERSTORM WAS INDICATED ON RADAR 5 MILES NORTH OF HOYT...OR ABOUT 16 MILES SOUTHWEST OF FORT MORGAN. THESE STORMS WERE MOVING NORTHEAST AT 20 MILES PER HOUR. RAIN FALLING ON ALREADY SATURATED GROUND MAY RESULT IN FLOODING...ESPECIALLY IF HEAVY RAINFALL DEVELOPS IN AREAS NORTH AND WEST OF FORT MORGAN. PERSONS IN OR NEAR ADENA SCHOOL...ADENA...ANTELOPE SPRINGS...FORT MORGAN...GOODRICH...HOYT...JACKSON RESERVOIR...LOG LANE VILLAGE... ORCHARD...SNYDER...TWELVE-MILE CORNER...WELDONA AND WIGGINS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. DANGEROUS LIGHTNING...SMALL HAIL...AND STRONG GUSTY WINDS WILL OCCUR WITH THESE STORM. FUNNELS CLOUDS WERE SPOTTED WITH THESE STORMS EARLIER THIS AFTERNOON. IF HEAVY RAINS DEVELOP LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES MAY BECOME FLOODED. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. BAKER
Special weather statement, Jul 30, 7:11 PM MDT, 54 minutes before
COZ046-047-310230- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 710PM MDT WED JUL 30 1997 ...FLASH FLOOD WATCH CANCELLED FOR LINCOLN AND ELBERT COUNTIES... THE FLASH FLOOD WATCH FOR LINCOLN AND EASTERN ELBERT COUNTIES HAS BEEN CANCELLED. ONLY ISOLATED THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE AREA THIS EVENING AND ARE NOT EXPECTED TO PRODUCE ENOUGH RAIN TO CAUSE ANY SIGNIFICANT RUNOFF PROBLEMS. FLASH FLOOD WATCHES STILL REMAIN IN EFFECT FOR THE REST OF NORTHEAST COLORADO INCLUDING THE FRONT RANGE FOOTHILLS AND MOUNTAIN SLOPES EAST OF THE CONTINENTAL DIVIDE. A VARIETY OF FLASH FLOOD WARNINGS AND URBAND AND SMALL STREAM FLOOD ADVISORIES HAVE BEEN ISSUED THIS AFTERNOON AND EVENING FOR NORTHEAST COLORADO. MONITOR LOCAL NEWS OUTLETS OR NOAA WEATHER RADIO FOR THE LATEST WEATHER FORECASTS AND BULLETINS. END...BOODA...WSFO DENVER
Special weather statement, Jul 30, 7:20 PM MDT, 45 minutes before
COZ036-041-310200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 720 PM MDT WED JUL 30 1997 ...THUNDERSTORMS PRODUCING HEAVY RAIN OVER DOUGLAS AND JEFFERSON COUNTIES... AT 715 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN OVER JEFFERSON AND WESTERN DOUGLAS COUNTIES. THE STRONGEST STORM WAS ABOUT 10 MILES WEST OF CASTLE ROCK. OTHER STRONG STORMS WERE BETWEEN GOLDEN AND EVERGREEN IN JEFFERSON COUNTY AND IN THE BUFFALO CREEK AREA. THESE STORMS WERE MOVING NORTHEAST AT 15 MILES PER HOUR. THE STORMS ARE CAPABLE OF PRODUCING HEAVY RAIN AND FREQUENT LIGHTNING. THE GROUND IN THIS AREA IS ALREADY SATURATED FROM PREVIOUS RAINFALL...AND ANY ADDITIONAL RAIN MAY RESULT IN FLOODING. DOPPLER RADAR INDICATED RAINFALL RATES OF 1 TO 1 1/2 INCHES AN HOUR HAD FALLEN WEST OF CASTLE ROCK. PERSONS IN OR NEAR ROXBOROUGH PARK...BUFFALO CREEK... EVERGREEN... CONIFER AND GOLDEN SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. IF HEAVY RAINS DEVELOP LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES MAY BECOME FLOODED. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. LESZCYNSKI
Special weather statement, Jul 30, 7:21 PM MDT, 44 minutes before
COZ036-041-310200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 720 PM MDT WED JUL 30 1997 ...THUNDERSTORMS PRODUCING HEAVY RAIN OVER DOUGLAS AND JEFFERSON COUNTIES... AT 715 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN OVER JEFFERSON AND WESTERN DOUGLAS COUNTIES. THE STRONGEST STORM WAS ABOUT 10 MILES WEST OF CASTLE ROCK. OTHER STRONG STORMS WERE BETWEEN GOLDEN AND EVERGREEN IN JEFFERSON COUNTY AND IN THE BUFFALO CREEK AREA. THESE STORMS WERE MOVING NORTHEAST AT 15 MILES PER HOUR. THE STORMS ARE CAPABLE OF PRODUCING HEAVY RAIN AND FREQUENT LIGHTNING. THE GROUND IN THIS AREA IS ALREADY SATURATED FROM PREVIOUS RAINFALL...AND ANY ADDITIONAL RAIN MAY RESULT IN FLOODING. DOPPLER RADAR INDICATED RAINFALL RATES OF 1 TO 1 1/2 INCHES AN HOUR HAD FALLEN WEST OF CASTLE ROCK. PERSONS IN OR NEAR ROXBOROUGH PARK...BUFFALO CREEK... EVERGREEN... CONIFER AND GOLDEN SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. IF HEAVY RAINS DEVELOP LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES MAY BECOME FLOODED. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. LESZCYNSKI
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 6:35 PM MDT | Flash Flood Warning | BOU | Logan, Weld | 3 hr |
| Jul 31, 2:25 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 35 min |
| Jul 31, 3:28 PM MDT | Tornado Warning | BOU | Elbert | 32 min |
| Jul 31, 4:00 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln, Washington | 60 min |
| Jul 31, 4:00 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 60 min |
| Jul 31, 5:27 PM MDT | Flash Flood Warning | BOU | Morgan | 2 hr |
| Jul 31, 5:30 PM MDT | Flash Flood Warning | BOU | Logan, Washington | 3 hr |
| Jul 31, 5:30 PM MDT | Flash Flood Warning | BOU | Douglas | 2 hr |
Nearby
Flash Flood Warnings in Colorado, 1997Every flash flood 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.