Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 32, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 30, 1997, 4:30 PM MDT for Logan County, Colorado. It was in force for 14 hr. 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, 4:30 PM MDT (22:30 UTC)
- Expired
- Jul 31, 1997, 6:00 AM MDT
- In force
- 14 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Logan County, CO
The radar
The Cheyenne radar (KCYS), 150 km from the middle of the area, began a volume at 22:32 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, 10.5 hours before the alert went out and 96 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
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, 10:56 AM MDT, 5 hours 34 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, 5 hours 30 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, 3 hours 5 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, 1:27 PM MDT, 3 hours 3 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, 1 hour 10 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, 1 hour 9 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, 3:25 PM MDT | Flash Flood Warning | BOU | Boulder, Clear Creek, Gilpin, Jefferson | 2 hr |
| 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 |
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.