Alert archive / Colorado / Flash Flood Warnings in 1996
Flash Flood Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Aug 23, 1996, 4:06 PM MDT for Jefferson County, Colorado. It was in force for 84 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
- Aug 23, 1996, 4:06 PM MDT (22:06 UTC)
- Expired
- Aug 23, 1996, 5:30 PM MDT
- In force
- 84 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Jefferson County, CO
The radar
The Denver radar (KFTG), 64 km from the middle of the area, began a volume at 22:06 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
Fort Carson/Butt, CO (KFCS), launched 12:00Z, 10.1 hours before the alert went out and 111 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
- 2 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 826 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 24 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 232210
FFWDEN
COC059-232330-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
406 PM MDT FRI AUG 23 1996
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 JEFFERSON
INCLUDING THE FOLLOWING LOCATIONS
BUFFALO CREEK...FERNDALE...AND FOXTON.
AT 405PM MDT JEFFERSON COUNTY SHERRIF REPORTS FLASH FLOODING IN THE
BUFFALO CREEK AREA. HIGHWAY 126 HAS BEEN CLOSED. BUFFALO CREEK...
SAND DRAW...AND THE NORTH FORK OF THE SOUTH PLATTE WILL BE DIRECTLY
EFFECTED BY THE EXCESSIVE RUNOFF.
DOPPLER RADAR HAS INDICATED RAINFALL RATES OF AN INCH AN HOUR SOUTH
OF PINE...AND WEST OF DECKERS. RAIN FALLING ON THE BUFFALO CREEK
BURN AREA WILL RUN OFF VERY QUICKLY.
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. 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 NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
DENVER.
LAT...LON 3943 10519 3926 10520 3923 10535 3938 10535
RTGWhat 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, Aug 23, 11:15 AM MDT, 4 hours 51 minutes before
COZ030-032>050-230600- SIGNIFICANT WEATHER OUTLOOK FOR NORTHEAST AND NORTH CENTRAL COLORADO NATIONAL WEATHER SERVICE DENVER CO 1115 AM MDT FRI AUG 23 1996 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 SYNOPSIS: A MOIST UNSTABLE AIRMASS WILL AGAIN SIT AGAINST THE FOOTHILLS TODAY. A RIDGE OF HIGH PRESSURE RESIDES OVER THE STATE... AND WINDS THROUGH THE ATMOSPHERE ARE VERY LIGHT. THUNDERSTORMS WILL DEVELOP OVER THE MOUNTAINS AFTER NOON...AND MOVE TO THE LOWER ELEVATIONS AFTER 3PM. THESE STORMS WILL MOVE VERY SLOWLY...ALLOWING 1 TO 2 INCHES OF RAIN TO FALL IN AN HOUR OVER LOCAL AREAS LATE THIS AFTERNOON. THE PRIME LOCATIONS FOR THIS HEAVY RAIN APPEAR TO BE FROM THE FOOTHILLS...EASTWARD TO WESTERN WELD AND WESTERN ELBERT COUNTIES. THESE AREAS ARE BEING CONSIDERED FOR A FLASH FLOOD WATCH LATER THIS AFTERNOON. FURTHER EAST THE AIRMASS IS MORE STABLE...AND THUNDERSTORMS ARE NOT EXPECTED EAST OF AKRON AND STERLING. SPOTTERS MAY RAGAIN BE NEEDED FOR RAINFALL RATES AND LOCAL FLOODING REPORTS THIS AFTERNOON. RTG
Special weather statement, Aug 23, 2:45 PM MDT, 1 hour 21 minutes before
COZ041-232300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 245 PM MDT THU AUG 22 1996 ...HEAVY RAIN IN DOUGLAS COUNTY... AT 232 PM DOPPLER RADAR SHOWED AN AREA OF VERY HEAVY RAIN IN EASTERN DOUGLAS COUNTY. THE AREA WAS ABOUT 10 MILES SOUTH OF FRANKTOWN ALONG CHERRY CREEK...AND RAINFALL HAS EXCEEDED 1.5 INCHES IN THE PAST HOUR. THE STORM WAS NEARLY STATIONARY. ANYONE LIVING IN EASTERN DOUGLAS COUNTY SHOULD BE PREPARED FOR VERY HEAVY RAIN OVER THE NEXT TWO HOURS. SOME LOCAL FLOODING OF LOW LYING ROADS MAY OCCUR. DO NOT ATTEMPT TO DRIVE THROUGH FLOODED AREAS...AS YOU WILL LOSE CONTROL OF YOUR CAR QUICKLY IN RUNNING WATER. A FLASH FLOOD WATCH WILL BE IN EFFECT FOR DOUGLAS COUNTY...AND THE FOOTHILLS AND ADJACENT PLAINS OF COLORADO UNTIL MIDNIGHT TONIGHT. RTG
Special weather statement, Aug 23, 3:07 PM MDT, 59 minutes before
COZ040-232300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 305 PM MDT FRI AUG 23 1996 ...ANOTHER WET RUSH HOUR IN THE DENVER AREA?... AT 301PM NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED NEW THUNDERSTORMS DEVELOPING RAPIDLY OVER THE SOUTHERN AND EASTERN METRO AREAS FROM NEAR CHATFIELD RESERVOIR...ACROSS LITTLETON TO AURORA. IT LOOKS LIKE ANOTHER WET COMMUNTE THIS AFTERNOON. THUNDERSTORMS TODAY HAVE BEEN MOVING VERY SLOWLY...WITH RAINFALL RATES LOCALLY REACHING 1.5 INCHES AN HOUR. A FLASH FLOOD WATCH REMAINS IN EFFECT FOR THE DENVER AREA THROUGH MIDNIGHT TONIGHT. RTG
Special weather statement, Aug 23, 3:45 PM MDT, 21 minutes before
COZ040-232345-
URBAN AND SMALL STREAM FLOOD ADVISORY
NATIONAL WEATHER SERVICE DENVER CO
339 PM MDT FRI AUG 23 1996
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED AN URBAN AND SMALL
STREAM FLOOD ADVISORY EFFECTIVE UNTIL 545 PM MDT FOR PEOPLE IN THE
FOLLOWING COUNTIES
IN COLORADO
NORTHEASTERN JEFFERSON...EXTREME NORTHERN DOUGLAS...WESTERN
ARAPAHOE...DENVER AND WESTERN ADAMS
INCLUDING...BUT NOT LIMITED TO THE FOLLOWING LOCATIONS
ARVADA...AURORA...EXTREME SOUTH CENTRAL BROOMFIELD...CHERRY
HILLS VILLAGE...COMMERCE CITY...DENVER...WESTERN DENVER
INTERNATIONAL AIRPORT...ENGLEWOOD...LAKEWOOD...LITTLETON...
NORTHGLENN...THORNTON...WESTMINSTER...WHEAT RIDGE...ACRES
GREEN...BARR LAKE...CHATFIELD RESERVOIR...EDGEWATER...FEDERAL
HEIGHTS...GRANDVIEW ESTATES...GREENWOOD VILLAGE...HIGHLANDS
RANCH...LEYDEN...MOUNTAIN VIEW...PARKER...SHERIDAN AND STONEGATE
AT 331 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
RAPIDLY DEVELOPING THUNDERSTORMS ACROSS THE DENVER METRO AREA.
RAINFALL AMOUNTS OF A HALF INCH TO THREE QUARTERS OF AN INCH WERE
INDICATED IN THE CHERRY HILLS AREA.
STORMS IN THE METRO AREA WILL BE MOVING VERY SLOWLY...AND RAINFALL
AMOUNTS OF 1 TO 1.5 INCHES AN HOUR WILL BE POSSIBLE.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE LOCAL FLOODING OF
HIGHWAYS...ROADS...AND UNDERPASSES. ANYONE DRIVING AROUND THE METRO
AREA SHOULD BE PREPARED FOR LOCAL FLOODINGx. DO NOT ATTEMPT TO DRIVE
THROUGH FLOODED INTERSECTIONS OR UNDERPASSES. YOU CAN EASILY LOSE
CONTROL OF YOUR VEHICLE.
RTGNearby
Flash Flood Warnings in Colorado, 1996Every flash flood warning in 1996
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.