Alert archive / Colorado / Flash Flood Warnings in 1996
Flash Flood Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 12, 1996, 10:13 PM MDT for Jefferson County, Park County, Colorado. It was in force for 4 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 12, 1996, 10:13 PM MDT (04:13 UTC)
- Expired
- Jul 13, 1996, 2:15 AM MDT
- In force
- 4 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Whole counties
Counties Jefferson County, CO, Park County, CO
The radar
The Denver radar (KFTG), 94 km from the middle of the area, began a volume at 04:17 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, 4.2 hours before the alert went out and 201 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 130420
FFWDEN
COC093-059-130815-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
1013 PM MDT FRI JUL 12 1996
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A FLASH FLOOD
WARNING EFFECTIVE UNTIL 215 AM MDT FOR PEOPLE IN THE FOLLOWING
COUNTIES
IN CENTRAL COLORADO
NORTHEASTERN PARK
IN NORTHEASTERN COLORADO
SOUTHERN JEFFERSON
INCLUDING THE FOLLOWING LOCATIONS
BAILEY...BUFFALO CREEK...GLENISLE...HIGHLAND PARK...PINE...
SHAFFERS CROSSING...SOUTH PLATTE AND WELLINGTON LAKE
AT 1013 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN 3 MILES SOUTHWEST OF PINE ...OR ABOUT 34 MILES
SOUTHWEST OF DENVER. THE RAIN IS FALLING ON THE BURNED AREA OF
BUFFALO CREEK AND PEOPLE ARE BEING EVACUATED FROM THE AREA.
FLOODING IS LIKELY TO OCCUR ALONG THE NORTH FORK OF THE SOUTH PLATTE
RIVER...BUFFALO CREEK...AND DEER CREEK DOWNSTREAM TO CHATFIELD
RESERVOIR.
EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF
SMALL CREEKS AND STREAMS...LOW LYING AREAS...HIGHWAYS...ROADS...AND
UNDERPASSES.
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 3918 10530 3928 10552 3950 10553 3940 10513What 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, 5:27 PM MDT, 4 hours 46 minutes before
COZ038-130030- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 525 PM MDT FRIDAY JULY 12 1996 ...THUNDERSTORM APPROACHING PAWNEE GRASSLANDS... RADAR INDICATES THAT A STRONG THUNDERSTORM HAS MOVED ACROSS THE WYOMING BORDER INTO NORTHWEST WELD COUNTY. THE THUNDERSTORM WAS LOCATED 5 MILES NORTH OF ROCKPOR COLORADO OR ABOUT 25 MILES SOUTH OF CHEYENNE WYOMIONG AT 525 PM MDT. IT WAS MOVING TO THE SOUTHEAST ABOUT 20 MPH AND WILL MOVE INTO THE PAWNEE GRASSLANDS BETWEEN 6 AND 630 PM MDT. IF YOU ARE IN THE OPEN SEEK SHELTER IF THIS THUNDERSTORM APPROACHES. IT MAY CONTAIN MARBLE OR LARGER SIZE HAIL ALONG WITH MODERATE TO HEAVY RAIN AND DEADLY LIGHTNING. WIND GUSTS TO 40 OR 50 MPH ARE ALSO POSSIBLE WITH THIS THUNDERSTORM. MOTORISTS DRIVING ALONG HIGHWAY 85 FROM NUNN NORTH TO THE WYOMING BORDER SHOULD BE ALERT FOR WATER PONDING ON ROADWAYS ESPECIALLY IN LOW LYING AREAS. A TORNADO WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL 8 PM MDT. END...GCF...WSFO DENVER
Special weather statement, Jul 12, 7:20 PM MDT, 2 hours 53 minutes before
COZ042-043-130145- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE DENVER CO 718 PM MDT FRI JUL 12 1996 ...THUNDERSTORM IN CENTRAL WELD COUNTY... AT 710 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM 3 MILES EAST OF GILL...OR ABOUT 12 MILES EAST OF GREELEY. HAMD RADIO SPOTTERS REPORT PEA SIZE HAIL AND HEAVY RAIN WITH LOCAL STREET FLOODING FROM THIS THUNDERSTORM. THE STORM WAS MOVING NORTHEAST AT 35 MILES PER HOUR. PERSONS IN OR NEAR BARNESVILLE...BRIGGSDALE...GALETON...GILL... KERSEY...PURCELL AND RIVERSIDE RESERVOIR SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER AND MOVE TO A PLACE OF SAFETY IF BAD WEATHER APPROACHES. 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. A TORNADO 2WATCH REMAINS IN EFFECT FOR MUCH OF EASTERN COLORADO UNTIL MIDNIGHT. END...BOODA...WSFO DENVER
Special weather statement, Jul 12, 8:31 PM MDT, 1 hour 42 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
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 13, 2:30 AM MDT | Flash Flood Warning | BOU | Jefferson | 3 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; radar from the NEXRAD Level II archive.