Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 14, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 28, 1997, 9:40 PM MDT for Larimer County, 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 28, 1997, 9:40 PM MDT (03:40 UTC)
- Expired
- Jul 29, 1997, 12:00 AM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 63 km from the middle of the area, began a volume at 03:40 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, 3.7 hours before the alert went out and 184 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
- 733 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 1050 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 122 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 290349 COR
FFWDEN
COC069-290600-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...RESTRANSMITTED
NATIONAL WEATHER SERVICE DENVER CO
940 PM MDT MON JUL 28 1997
...THIS IS A DANGEROUS SITUATION...
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL MIDNIGHT MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTH CENTRAL COLORADO
EASTERN LARIMER
INCLUDING THE FOLLOWING LOCATIONS
FORT COLLINS...BELLVUE...HARMONY...LIVERMORE...MASONVILLE AND
TEDS PLACE
AT 934 PM MDT...THE LARIMER COUNTY SHERIFF REPORTED FLOODING OF
HOMES IN TAFT CANYON ESTATES...BETWEEN FORT COLLINS AND HORSETOOTH
RESERVOIR. BETWEEN 3 AND 4 INCHES OF RAIN HAS ALREADY FALLEN IN
THIS AREA.
MORE HEAVY RAIN WILL CONTINUE THROUGH 11 PM OVER EASTERN LARIMER
COUNTY. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WILL CAUSE
ADDITIONAL FLOODING PROBLEMS. THIS IS A DANGEROUS SITUATION!
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
SWIFTL4Y FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.
THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES IN STEEP
TERRAIN.
BARJENBRUCH
LAT...LON 4043 10507 4041 10528 4098 10529 4100 10502What 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 28, 3:59 PM MDT, 5 hours 41 minutes before
COZ034-036-037-040-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 400 PM MDT MON JUL 28 1997 ...THUNDERSTORMS WITH HEAVY RAIN IN THE FOOTHILLS WEST OF DENVER... AT 400 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM JUST WEST OF GOLDEN TO BAILEY...AND THEN INTO CENTRAL PARK COUNTY. THE STRONGEST STORM WAS OVER EVERGREEN...OR ABOUT 20 MILES SOUTHWEST OF DOWNTOWN DENVER. THE STORMS WERE MOVING VERY SLOWLY NORTHEAST AT 5 MILES PER HOUR. PERSONS IN OR NEAR GOLDEN...ANTERO RESERVOIR...ASPEN PARK...BAILEY... BERGEN PARK...COMO...CONIFER...EVERGREEN...FAIRPLAY...PARK... HARTSEL...HIGHLAND PARK...IDLEDALE...INDIAN HILLS...JEFFERSON... KITTREDGE...PINE...RED HILL PASS...SHAWNEE...TARRYALL RESERVOIR...TINY TOWN...WELLINGTON LAKE AND WHITE RANCH OPEN SPACE SHOULD BE ON THE LOOKOUT FOR VERY HEAVY RAIN. THE STRONGEST STORMS IN THIS LINE WILL PRODUCE BETWEEN 1 AND 2 INCHES OF RAIN IN AN HOUR. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFOtRE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. BARJENBRUCH
Special weather statement, Jul 28, 4:00 PM MDT, 5 hours 40 minutes before
COZ034-036-037-040-282300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 400 PM MDT MON JUL 28 1997 ...THUNDERSTORMS WITH HEAVY RAIN IN THE FOOTHILLS WEST OF DENVER... AT 400 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM JUST WEST OF GOLDEN TO BAILEY...AND THEN INTO CENTRAL PARK COUNTY. THE STRONGEST STORM WAS OVER EVERGREEN...OR ABOUT 20 MILES SOUTHWEST OF DOWNTOWN DENVER. THE STORMS WERE MOVING VERY SLOWLY NORTHEAST AT 5 MILES PER HOUR. PERSONS IN OR NEAR GOLDEN...ANTERO RESERVOIR...ASPEN PARK...BAILEY... BERGEN PARK...COMO...CONIFER...EVERGREEN...FAIRPLAY...PARK... HARTSEL...HIGHLAND PARK...IDLEDALE...INDIAN HILLS...JEFFERSON... KITTREDGE...PINE...RED HILL PASS...SHAWNEE...TARRYALL RESERVOIR...TINY TOWN...WELLINGTON LAKE AND WHITE RANCH OPEN SPACE SHOULD BE ON THE LOOKOUT FOR VERY HEAVY RAIN. THE STRONGEST STORMS IN THIS LINE WILL PRODUCE BETWEEN 1 AND 2 INCHES OF RAIN IN AN HOUR. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. BARJENBRUCH
Special weather statement, Jul 28, 6:17 PM MDT, 3 hours 23 minutes before
COZ040-290045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 617 PM MDT MON JUL 28 1997 ...THUNDERSTORMS WITH STRONG GUSTY WINDS AND TORRENTIAL RAIN MOVING THROUGH AURORA... AT 617 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE AREA OF THUNDERSTORMS OVER AURORA. THESE STORMS WERE PRODUCING WIND GUSTS UP TO 50 MPH...AND TORRENTIAL RAIN. BRIEF FUNNEL CLOUDS WERE ALSO REPORTED NEAR BUCKLEY. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AURORA...EASTERN DENVER...ARAPAHOE PARK...BEVERLY HILLS...GREENWOOD VILLAGE...PARKER AND SURREY RIDGE SHOULD BE ON THE LOOKOUT FOR DANGEROUS WEATHER CONDITIONS. MOVE INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. FLOODING OF ROADS...HIGHWAYS...DITCHES...AND OTHER LOW LYING AREAS WILL OCCUR WITH THESE STORMS. DO NOT DRIVE THROUGH FLOODED AREAS. BARJENBRUCH
Special weather statement, Jul 28, 6:21 PM MDT, 3 hours 19 minutes before
COZ040-290045- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 617 PM MDT MON JUL 28 1997 ...THUNDERSTORMS WITH STRONG GUSTY WINDS AND TORRENTIAL RAIN MOVING THROUGH AURORA... AT 617 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LARGE AREA OF THUNDERSTORMS OVER AURORA. THESE STORMS WERE PRODUCING WIND GUSTS UP TO 50 MPH...AND TORRENTIAL RAIN. BRIEF FUNNEL CLOUDS WERE ALSO REPORTED NEAR BUCKLEY. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR AURORA...EASTERN DENVER...ARAPAHOE PARK...BEVERLY HILLS...GREENWOOD VILLAGE...PARKER AND SURREY RIDGE SHOULD BE ON THE LOOKOUT FOR DANGEROUS WEATHER CONDITIONS. MOVE INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. FLOODING OF ROADS...HIGHWAYS...DITCHES...AND OTHER LOW LYING AREAS WILL OCCUR WITH THESE STORMS. DO NOT DRIVE THROUGH FLOODED AREAS. BARJENBRUCH
Special weather statement, Jul 28, 9:28 PM MDT, 12 minutes before
COZ040-290430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 928 PM MDT MON JUL 28 1997 ...MORE THUNDERSTORMS WITH HEAVY RAIN IN THE DENVER METRO AREA... AT 926 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER NORTHEAST ARVADA... WESTMINSTER AND FEDERAL HEIGHTS. A WEATHER SPOTTER AT 76TH AND SHERIDAN REPORTED 1 INCH OF RAIN IN 24 MINUTES AS THIS STORM PASSED OVERHEAD. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR NORTHEAST ARVADA...NORTHGLENN...THORNTON... WESTMINSTER...BRIGHTON AND FEDERAL HEIGHTS SHOULD BE ON THE LOOKOUT FOR VERY HEAVY RAIN. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. BARJENBRUCH
Special weather statement, Jul 28, 9:31 PM MDT, 9 minutes before
COZ040-290430- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 928 PM MDT MON JUL 28 1997 ...MORE THUNDERSTORMS WITH HEAVY RAIN IN THE DENVER METRO AREA... AT 926 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER NORTHEAST ARVADA... WESTMINSTER AND FEDERAL HEIGHTS. A WEATHER SPOTTER AT 76TH AND SHERIDAN REPORTED 1 INCH OF RAIN IN 24 MINUTES AS THIS STORM PASSED OVERHEAD. THE STORM WAS MOVING NORTHEAST AT 20 MILES PER HOUR. PERSONS IN OR NEAR NORTHEAST ARVADA...NORTHGLENN...THORNTON... WESTMINSTER...BRIGHTON AND FEDERAL HEIGHTS SHOULD BE ON THE LOOKOUT FOR VERY HEAVY RAIN. HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS. BARJENBRUCH
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 6:41 PM MDT | Flash Flood Warning | BOU | Adams | 2 hr |
| Jul 28, 6:58 PM MDT | Flash Flood Warning | BOU | Weld | 2 hr |
| Jul 28, 7:55 PM MDT | Tornado Warning | BOU | Elbert | 35 min |
| Jul 29, 3:50 PM MDT | Tornado Warning | BOU | Arapahoe, Elbert | 40 min |
| Jul 29, 4:38 PM MDT | Flash Flood Warning | BOU | Elbert | 112 min |
| Jul 29, 5:37 PM MDT | Flash Flood Warning | BOU | Elbert | 113 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.