Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 30, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 30, 1997, 3:25 PM MDT for 4 counties in Colorado. It was in force for 2 hr. 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
- Jul 30, 1997, 3:25 PM MDT (21:25 UTC)
- Expired
- Jul 30, 1997, 5:30 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Boulder County, CO, Clear Creek County, CO, Gilpin County, CO, Jefferson County, CO
The radar
The Denver radar (KFTG), 72 km from the middle of the area, began a volume at 21:20 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, 9.4 hours before the alert went out and 182 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
- 158 J/kg
- Mixed-layer CIN
- -94 J/kg
- Mixed-layer LCL
- 1017 m above ground
- 0-6 km bulk shear
- 7 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -23 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 302128
FFWDEN
COC013-019-047-059-302330-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
325 PM MDT WED JUL 30 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL 530 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEAST COLORADO
SOUTHERN BOULDER AND NORTHWESTERN JEFFERSON
IN CENTRAL COLORADO
NORTHEASTERN CLEAR CREEK AND GILPIN
INCLUDING THE FOLLOWING LOCATIONS
BOULDER...NORTH CENTRAL GOLDEN...ASPEN SPRINGS...BLACK HAWK...
CENTRAL CITY...DUMONT...ELDORADO SPRINGS...ELDORA...NEDERLAND...
PINECLIFFE...ROCKY FLATS...ROLLINSVILLE...TOLLAND AND WHITE
RANCH OPEN SPACE
AT 325 PM MDT WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
NORTHWEST OF IDAHO SPRINGS AND SOUTHWEST OF BOULDER.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.
A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.
TO REPORT SEVERE WEATHER HAVE THE JNEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
DENVER.
LESZCYNSKI
LAT...LON 4004 10520 3975 10520 3975 10563 4005 10561What 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, 10:56 AM MDT, 4 hours 29 minutes before
COZ030-032>050-310600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT WED JUL 30 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 ...FLASH FLOOD WATCH FOR THE FRONT RANGE FOOTHILLS AND NORTHEAST PLAINS UNTIL MIDNIGHT... SYNOPSIS: A MOIST MONSOONAL FLOW ALOFT WILL CONTINUE OVER MUCH OF THE AREA TODAY. THE SITUATION IS SIMILAR TO YESTERDAY...WITH SLOW MOVING THUNDERSTORMS DROPPING VERY HEAVY RAIN ON ALREADY SATURATED SOIL. IN ADDITION SEVERAL CREEKS AND STREAMS...ESPECIALLY THOSE FROM AROUND STERLING SOUTHWARD...ARE ALREADY SWOLLEN OR FLOODING FROM HEAVY RAIN THAT HIT THE AREA LAST NIGHT. CONDITIONS ARE ALSO FAVORABLE FOR ANOTHER DENVER CYCLONE THIS AFTERNOON. THE DEVELOPMENT OF THIS CONVERGENCE LINE WILL AGAIN BE EAST OF THE DENVER AREA. THE LINE MAY ORIENT ITSELF NORTH AND SOUTH OF STRASBURG...EXTENDING INTO EASTERN ELBERT COUNTY. WIND SHEAR WILL AGAIN BE FAVORABLE ALONG THIS LINE FOR A FEW SHORT LIVED TORNADOS. SCATTERED THUNDERSTORMS WILL DEVELOP IN THE FOOTHILLS...AND ALONG THE CONVERGENCE LINE AROUND 1 PM. THE STORMS WILL INCREASE IN COVERAGE SLOWLY SPREADING EASTWARD FOR TfHE REMAINDER OF THE AFTERNOON AND CONTINUE INTO THIS EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED...BUT REPORTS OF HEAVY RAINFALL OR FLOODING WILL BE GREATLY APPRECIATED. FMC
Special weather statement, Jul 30, 11:00 AM MDT, 4 hours 25 minutes before
COZ030-032>050-310600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1100 AM MDT WED JUL 30 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 ...FLASH FLOOD WATCH FOR THE FRONT RANGE FOOTHILLS AND NORTHEAST PLAINS UNTIL MIDNIGHT... SYNOPSIS: A MOIST MONSOONAL FLOW ALOFT WILL CONTINUE OVER MUCH OF THE AREA TODAY. THE SITUATION IS SIMILAR TO YESTERDAY...WITH SLOW MOVING THUNDERSTORMS DROPPING VERY HEAVY RAIN ON ALREADY SATURATED SOIL. IN ADDITION SEVERAL CREEKS AND STREAMS...ESPECIALLY THOSE FROM AROUND STERLING SOUTHWARD...ARE ALREADY SWOLLEN OR FLOODING FROM HEAVY RAIN THAT HIT THE AREA LAST NIGHT. CONDITIONS ARE ALSO FAVORABLE FOR ANOTHER DENVER CYCLONE THIS AFTERNOON. THE DEVELOPMENT OF THIS CONVERGENCE LINE WILL AGAIN BE EAST OF THE DENVER AREA. THE LINE MAY ORIENT ITSELF NORTH AND SOUTH OF STRASBURG...EXTENDING INTO EASTERN ELBERT COUNTY. WIND SHEAR WILL AGAIN BE FAVORABLE ALONG THIS LINE FOR A FEW SHORT LIVED TORNADOS. SCATTERED THUNDERSTORMS WILL DEVELOP IN THE FOOTHILLS...AND ALONG THE CONVERGENCE LINE AROUND 1 PM. THE STORMS WILL INCREASE IN COVERAGE SLOWLY SPREADING EASTWARD FOR THE REMAINDER OF THE AFTERNOON AND CONTINUE INTO THIS EVENING. SPOTTER ACTIVATION IS NOT ANTICIPATED...BUT REPORTS OF HEAVY RAINFALL OR FLOODING WILL BE GREATLY APPRECIATED. FMC
Special weather statement, Jul 30, 1:25 PM MDT, 2 hours before
COZ033>035-302025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 125 PM MDT WED JUL 30 1997 ...THUNDERSTORMS DEVELOPING ALONG THE FOOTHILLS OF LARIMER AND BOULDER COUNTIES... AT 120 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS DEVELOPING ALONG THE FOOTHILLS OF BOULDER AND LARIMER COUNTIES. THE STRONGEST STORM WAS OVER MEEKER PARK...OR ABOUT 34 MILES SOUTHWEST OF FORT COLLINS. THE STORMS WERE SLOWLY MOVING NORTH AT 5 MPH. THE SLOW MOVING STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN OVER A GIVEN AREA. PERSONS IN WESTERN BOULDER AND WESTERN LARIMER COUNTIES...INCLUDING THE LOCATIONS OF ALLENSPARK...BRAINARD LAKE... ESTES PARK...GLEN HAVEN...GOLD HILL...JAMESTOWN...MEEKER PARK... PEACEFUL VALLEY...RAYMOND...RED FEATHER LAKES...RUSTIC AND WARD SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. A FLASH FLOOD WATCH IS IN EFFECT FOR MUCH OF NORTHEAST COLORADO UNTIL MIDNIGHT...INCLUDING THE FOOTHILLS OF BOULDER AND LARIMER COUNTIES. BE ALERT THE POSSIBILITY OF FLASH FLOODING AND BE PREPARED TO EVACUATE TO HIGHER GROUND IF FLASH FLOODING OCCURS. CONTINUE TO MONITOR NOAA WEATHER RADIO OR THE LOCAL NEWS MEDIA FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. LESZCYNSKI
Special weather statement, Jul 30, 1:27 PM MDT, 1 hour 58 minutes before
COZ033>035-302025- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 125 PM MDT WED JUL 30 1997 ...THUNDERSTORMS DEVELOPING ALONG THE FOOTHILLS OF LARIMER AND BOULDER COUNTIES... AT 120 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS DEVELOPING ALONG THE FOOTHILLS OF BOULDER AND LARIMER COUNTIES. THE STRONGEST STORM WAS OVER MEEKER PARK...OR ABOUT 34 MILES SOUTHWEST OF FORT COLLINS. THE STORMS WERE SLOWLY MOVING NORTH AT 5 MPH. THE SLOW MOVING STORMS ARE CAPABLE OF PRODUCING VERY HEAVY RAIN OVER A GIVEN AREA. PERSONS IN WESTERN BOULDER AND WESTERN LARIMER COUNTIES...INCLUDING THE LOCATIONS OF ALLENSPARK...BRAINARD LAKE... ESTES PARK...GLEN HAVEN...GOLD HILL...JAMESTOWN...MEEKER PARK... PEACEFUL VALLEY...RAYMOND...RED FEATHER LAKES...RUSTIC AND WARD SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. A FLASH FLOOD WATCH IS IN EFFECT FOR MUCH OF NORTHEAST COLORADO UNTIL MIDNIGHT...INCLUDING THE FOOTHILLS OF BOULDER AND LARIMER COUNTIES. BE ALERT THE POSSIBILITY OF FLASH FLOODING AND BE PREPARED TO EVACUATE TO HIGHER GROUND IF FLASH FLOODING OCCURS. CONTINUE TO MONITOR NOAA WEATHER RADIO OR THE LOCAL NEWS MEDIA FOR FURTHER STATEMENTS AND POSSIBLE WARNINGS. LESZCYNSKI
Special weather statement, Jul 30, 3:20 PM MDT, 5 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 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
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 6:24 PM MDT | Flash Flood Warning | BOU | Elbert | 96 min |
| Jul 29, 7:03 PM MDT | Flash Flood Warning | BOU | Logan, Weld | 72 min |
| Jul 29, 7:59 PM MDT | Flash Flood Warning | BOU | Elbert, Lincoln | 2 hr |
| Jul 29, 8:00 PM MDT | Flash Flood Warning | BOU | Logan, Weld | 90 min |
| Jul 29, 8:15 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 29, 8:20 PM MDT | Flash Flood Warning | BOU | Morgan | 55 min |
| Jul 29, 9:20 PM MDT | Flash Flood Warning | BOU | Morgan | 40 min |
| Jul 29, 9:40 PM MDT | Flash Flood Warning | BOU | Logan, Weld | 80 min |
| Jul 29, 9:55 PM MDT | Flash Flood Warning | BOU | Elbert, Lincoln | 2 hr |
| Jul 29, 10:10 PM MDT | Flash Flood Warning | BOU | Morgan | 50 min |
| Jul 29, 10:50 PM MDT | Flash Flood Warning | BOU | Logan, Morgan, Washington, Weld | 2 hr |
| Jul 29, 11:26 PM MDT | Flash Flood Warning | BOU | Elbert, Lincoln | 2 hr |
| Jul 30, 2:25 PM MDT | Flash Flood Warning | BOU | Larimer | 110 min |
| Jul 30, 4:05 PM MDT | Flash Flood Warning | BOU | Boulder, Jefferson | 115 min |
| Jul 30, 4:05 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Jefferson | 115 min |
| Jul 30, 4:30 PM MDT | Flash Flood Warning | BOU | Logan | 14 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.