Alert archive / Colorado / Flash Flood Warnings in 1996
Flash Flood Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 13, 1996, 2:30 AM MDT for Jefferson County, Colorado. It was in force for 3 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 13, 1996, 2:30 AM MDT (08:30 UTC)
- Expired
- Jul 13, 1996, 5:00 AM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
County Jefferson County, CO
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 8.5 hours before the alert went out and 176 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
- 1200 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 1461 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -30 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KDEN 130835 RRA
FFWDEN
COC059-131100-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
230 AM MDT SAT JUL 13 1996
...FLASH FLOOD WARNING FOR SOUTHERN JEFFERSON COUNTY UNTIL 5 AM...
INCLUDING THE FOLLOWING LOCATIONS
BUFFALO CREEK...RIVERVIEW...FERNDALE...NIGHTHAWK...
AND TWIN CEDARS
EVEN THOUGH THE RAINS HAVE SUBSIDED...FLOODING IS STILL OCCURING
FROM BUFFALO CREEK NORTHWARD TO THE PLATTE RIVER ALONG COUNTY ROAD
96. THIS AREA COVERS RIVERVIEW AND FERNDALE. FLOODING IS ALSO
OCCURING ALONG THE SOUTH PLATTE FROM NIGHTHAWK NORTHWARD TO THE TOWN
OF SOUTH PLATTE. ROADS IN THE ABOVE AREAS ARE FLOODED AND
IMPASSABLE. DO NOT TRY TO CROSS FLOODED ROADWAYS.
AT 220 AM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED NO
THUNDERSTORM ACTIVITY OVER SOUTHERN JEFFERSON COUNTY. RADAR
ESTIMATED OVER 2 INCHES OF RAIN HAD FALLEN OVER THE BUFFALO CREEK
BURN AREA YESTERDAY ALLOWING THE GROUND TO SATURATE 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.
ENTREKINWhat 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 12, 8:31 PM MDT, 5 hours 59 minutes before
COZ044-045-049-046-041-130330- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 830 PM MDT FRI JUL 12 1996 ...THUNDERSTORMS IN NORTHEAST COLORADO... CLUSTERS OF THUNDERSTORMS MOVING THROUGH DOUGLAS...ELBERT...LINCOLN... WASHINGTON...MORGAN AND EASTERN ADAMS AND ARAPAHOE COUNTIES ARE DUMPING HEAVY RAIN AND SMALL HAIL. THE HEAVY RAIN IS FALLING IN SOME LOCATIONS AT THE RATE OF 1 INCH PER HOUR. THE THUNDERSTORMS ARE MOVING TO THE SOUTHEAST ABOUT 10-20 MPH. ANYONE TRAVELLING ON I-70 EAST OF DENVER OR I-76 THROUGH MORGAN COUNTY AS WELL AS OTHER ROADS IN NORTHEAST COLORADO SHOULD DRIVE WITH CAUTION AND BE ALERT FOR HEAVY RAIN CAUSING LOCAL FLOODING OF STREETS AND HIGHWAYS ESPECIALLY IN LOW LYING AREAS. MANY SMALL STREAMS AND CREEKS WILL BE RUNNING QUITE HIGH AND FAST. DO NOT TRY TO FORD OR WADE ACROSS RAIN SWOLLEN STREAMS. MOST OF THE THUNDERSTORMS ARE SLOWLY WEAKENING BUT WILL CONTINUE TO RUMBLE UNTIL WELL AFTELR DARK. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL MIDNIGHT. END...BOODA...WSFO DENVER
Special weather statement, Jul 12, 10:52 PM MDT, 3 hours 38 minutes before
COZ040-130530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1049 PM MDT FRI JUL 12 1996 ...ANOTHER THUNDERSTORM CRUSING THROUGH THE DENVER AREA... A STRONG THUNDERSTORM IS MOVING SOUTH THROUGH THE DENVER METRO AREA BRINGING MORE HEAVY RAIN...HAIL AND FREQUENT LIGHTNING. THE AREAS MOST AFFECTED BY THIS THUNDERSTORM WILL BE ARVADA...DENVER...LAKEWOOD EDGEWATER...LEYDEN...MOUNTAIN VIEW...WESTMINSTER AND WHEAT RIDGE AT 1050 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM OVER ARVADA ...OR ABOUT 12 MILES NORTHWEST OF DENVER. 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. END...BOODA...WSFO DENVER
Special weather statement, Jul 12, 11:02 PM MDT, 3 hours 28 minutes before
COZALL-130530- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1049 PM MDT FRI JUL 12 1996 ...TORNADO WATCH FOR EASTERN COLORADO CANCELLED... THE TORNADO WATCH THAT COVERED A LARGE PORTION OF EASTERN COLORADO HAS BEEN CANCELLED AT 11 PM MDT. ALTHOUGH A COUPLE OF THUNDERSTORMS ARE STILL RUMBLING IN THE DENVER AREA AND OVER THE PALMER DIVIDE...THEY ARE WEAKENING AND NO FURTHER SEVERE WEATHER IS EXPECTED IN NORTHEAST COLORADO TONIGHT". END...BOODA...WSFO DENVER
Special weather statement, Jul 12, 11:58 PM MDT, 2 hours 32 minutes before
COZ038-039-040-041-130700- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 1155 PM MDT FRI JUL 12 1996 ...LOCAL HEAVY RAIN CONTINUES ALONG FRONT RANGE... SCATTERED SHOWERS AND THUNDERSTORMS STRETCH FROM NEAR LYONS IN LARIMER COUNTY SOUTHEAST THROUGH BOULDER...SOUTHWEST WELD...DENVER AND INTO DOUGLAS AND ELBERT COUNTIES. THESE CELLS CONTINUE TO MOVE SOUTHEAST ABOUT 10-20 MPH AND ARE CAUSING MODERATE TO HEAVY RAIN IN A FEW LOCATIONS. THE ADDITIONAL RAIN WILL EXACERBATE THE LOCAL FLOODING OF STREETS AND SMALL STREAMS THROUGH THE EARLY MORNING HOURS. SMALL HAIL IS ALSO POSSIBLE WITH SOME OF THE THUNDERSTORMS. MOTORISTS NEED TO REMAIN ALERT FOR FLOODED ROADS AND HIGHWAYS ESPECIALLY IN LOW LYING AREAS. AVOID SWOLLEN AND SWIFT FLOWING STREAMS. A FLASH FLOOD WARNING CONTINUES IN EFFECT UNTIL 2 AM MDT FOR PORTIONS OF JEFFERSON AND PARK COUNTIES MAINLY IN THE AREA WHERE A WILDFIRE DENUDED THE LANDSCAPE AROUND BUFFALO CREEK. END...BOODA...WSFO DENVER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 6:35 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 40 min |
| Jul 12, 7:02 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Jefferson | 43 min |
| Jul 12, 7:10 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 50 min |
| Jul 12, 7:26 PM MDT | Tornado Warning | BOU | Adams, Arapahoe, Washington | 34 min |
| Jul 12, 7:50 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 40 min |
| Jul 12, 7:54 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Denver | 21 min |
| Jul 12, 7:54 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 21 min |
| Jul 12, 8:13 PM MDT | Severe Thunderstorm Warning | BOU | Boulder, Weld | 47 min |
| Jul 12, 8:20 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Douglas | 40 min |
| Jul 12, 8:50 PM MDT | Tornado Warning | BOU | Adams, Denver, Jefferson | 25 min |
| Jul 12, 8:50 PM MDT | Tornado Warning | BOU | Boulder | 25 min |
| Jul 12, 9:05 PM MDT | Tornado Warning | BOU | Weld | 25 min |
| Jul 12, 9:16 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Jefferson | 44 min |
| Jul 12, 9:19 PM MDT | Severe Thunderstorm Warning | BOU | Douglas | 41 min |
| Jul 12, 9:29 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 31 min |
| Jul 12, 10:01 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 44 min |
| Jul 12, 10:06 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 24 min |
| Jul 12, 10:13 PM MDT | Flash Flood Warning | BOU | Jefferson, Park | 4 hr |
| Jul 13, 2:40 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 35 min |
| Jul 13, 3:12 PM MDT | Tornado Warning | BOU | Weld | 33 min |
| Jul 13, 3:40 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 35 min |
| Jul 13, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 40 min |
| Jul 13, 4:10 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Washington | 35 min |
| Jul 13, 4:10 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 35 min |
| Jul 13, 4:11 PM MDT | Tornado Warning | BOU | Morgan, Washington | 34 min |
| Jul 13, 4:24 PM MDT | Tornado Warning | BOU | Elbert, Lincoln | 21 min |
| Jul 13, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Denver | 45 min |
| Jul 13, 4:30 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 45 min |
| Jul 13, 4:50 PM MDT | Tornado Warning | BOU | Washington | 25 min |
| Jul 13, 5:00 PM MDT | Tornado Warning | BOU | Adams, Arapahoe | 30 min |
| Jul 13, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Elbert | 45 min |
| Jul 13, 5:15 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 6 hr |
Nearby
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.