Alert archive / Colorado / Flash Flood Warnings in 2012
Flash Flood Warning 20, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 16, 2012, 2:31 PM MDT for Jefferson County, Park County, Colorado. It was in force for 51 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 16, 2012, 2:31 PM MDT (20:31 UTC)
- Expired
- Jul 16, 2012, 3:22 PM MDT
- In force
- 51 min
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
Counties Jefferson County, CO, Park County, CO
The radar
The Denver radar (KFTG), 84 km from the middle of the area, began a volume at 20:32 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 12:00Z, 8.5 hours before the alert went out and 193 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
- 1 J/kg
- Mixed-layer CIN
- -362 J/kg
- Mixed-layer LCL
- 2158 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
084
WGUS55 KBOU 162031
FFWBOU
COC059-093-162230-
/O.NEW.KBOU.FF.W.0020.120716T2031Z-120716T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
231 PM MDT MON JUL 16 2012
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN PARK COUNTY IN CENTRAL COLORADO
WEST CENTRAL JEFFERSON COUNTY IN NORTHEAST COLORADO
* UNTIL 430 PM MDT
* AT 229 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM NEAR PINE JUNCTION...OR 29
MILES SOUTHWEST OF DENVER. THIS STORM WAS MOVING NORTH AT 10 MPH.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PINE
JUNCTION...PINE GROVE...WELLINGTON LAKE...SHAWNEE...HARRIS PARK...
CONIFER...BUFFALO CREEK AND BAILEY.
DOPPLER RADAR ESTIMATES THAT ONE TO TWO INCHES OF RAIN HAVE FALLEN
JUST SOUTH OF BAILEY COLORADO IN PARK COUNTY SINCE 1:15 PM MDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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. TURN AROUND...DO NOT DROWN.
&&
LAT...LON 3956 10545 3953 10528 3938 10524 3931 10530
3927 10542 3928 10556 3948 10555
$$
RJK1 follow-up statement
289
WGUS75 KBOU 162122
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
322 PM MDT MON JUL 16 2012
COC059-093-162127-
/O.CAN.KBOU.FF.W.0020.000000T0000Z-120716T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PARK CO-JEFFERSON CO-
322 PM MDT MON JUL 16 2012
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR WEST CENTRAL
JEFFERSON AND NORTHEASTERN PARK COUNTIES...
THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. RAINFALL
REPORTS IN THE WARNING AREA WERE ALL UNDER 0.75 OF AN INCH. HOWEVER
WHERE THE RADAR ESTIMATED THE GREATEST AMOUNTS...ABOUT 2
INCHES...LOCATED FROM 2 TO 5 MILES SOUTH OF BAILEY IN PARK
COUNTY...THERE WERE NO RAINFALL REPORTS.
LAT...LON 3956 10545 3953 10528 3938 10524 3931 10530
3927 10542 3928 10556 3948 10555
$$
RJKThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 1:43 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 16, 4:34 PM MDT | Flash Flood Warning | BOU | Boulder | 49 min |
Nearby
Flash Flood Warnings in Colorado, 2012Every flash flood warning in 2012
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.