Alert archive / Colorado / Flash Flood Warnings in 1997
Flash Flood Warning 12, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 28, 1997, 6:41 PM MDT for Adams 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, 6:41 PM MDT (00:41 UTC)
- Expired
- Jul 28, 1997, 9:00 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Adams County, CO
The radar
The Denver radar (KFTG), 66 km from the middle of the area, began a volume at 00:43 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, 0.7 hours before the alert went out and 47 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 290041
FFWDEN
COC001-290300-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
641 PM MDT MON JUL 28 1997
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL 900 PM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN NORTHEAST COLORADO
EXTREME EASTERN ADAMS
INCLUDING THE FOLLOWING LOCATIONS
SHAMROCK
AT 637 PM MDT WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG
THUNDERSTORM WITH TORRENTIAL RAIN NEAR SHAMROCK. THE HEAVIEST
RAIN...UP TO 4 INCHES...HAD OCCURRED ABOUT 2 MILES SOUTH OF
SHAMROCK. ADDITIONAL HEAVY RAIN WILL CONTINUE THROUGH 730 PM...
WITH RAIN FALLING AT THE RATE OF 1 TO 2 INCHES AN HOUR.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
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.
BARJENBRUCH
LAT...LON 3991 10371 3983 10371 3981 10389 3989 10386What 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, 3:44 PM MDT, 2 hours 57 minutes before
COZ043-282245- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 344 PM MDT MON JUL 28 1997 ...STRONG THUNDERSTORM IN SOUTHERN WELD COUNTY.. AT 341 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 5 MILES NORTHEAST OF FORT LUPTON...OR ABOUT 20 MILES SOUTH OF GREELEY. THIS STORM WAS PRODUCING A FUNNEL CLOUD. PERSONS BETWEEN FORT LUPTON AND MILTON RESERVOIR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER. MOVE TO A PLACE OF SAFETY IF A FUNNEL CLOUD APPROACHES. THE STORM WAS MOVING NORTHEAST AT 10 MILES PER HOUR. DUE TO THE SLOW MOVEMENT...VERY HEAVY RAIN CAN ALSO BE EXPECTED WITH THE STORM. UP TO 2 INCHES WILL FALL IN LESS THAN 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, 3:59 PM MDT, 2 hours 42 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, 2 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...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. BARJENBRUCH
Special weather statement, Jul 28, 6:17 PM MDT, 24 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, 20 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
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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 28, 9:40 PM MDT | Flash Flood Warning | BOU | Larimer | 2 hr |
| 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.