Alert archive / Colorado / Flash Flood Warnings in 2012
Flash Flood Warning 11, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 6, 2012, 3:36 PM MDT for Douglas 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 as issued.
The facts
- Issued
- Jul 6, 2012, 3:36 PM MDT (21:36 UTC)
- Expired
- Jul 6, 2012, 5:57 PM MDT
- In force
- 2 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Douglas County, CO
The radar
The Denver radar (KFTG), 65 km from the middle of the area, began a volume at 21:38 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, 9.6 hours before the alert went out and 161 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2053 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
365 WGUS55 KBOU 062136 FFWBOU COC035-070030- /O.NEW.KBOU.FF.W.0011.120706T2136Z-120707T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 336 PM MDT FRI JUL 6 2012 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL DOUGLAS COUNTY IN NORTHEAST COLORADO * UNTIL 630 PM MDT * AT 334 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 3 MILES NORTHEAST OF PERRY PARK...OR 30 MILES NORTH OF COLORADO SPRINGS. THIS STORM WAS MOVING NORTH AT 5 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PERRY PARK AND THE PLUM CREEK AND EAST PLUM CREEK RIVER BASINS. AUTOMATED RAIN GAUGES INDICATE THAT 2.05 INCHES OF RAIN HAS FALLEN FROM THIS STORM IN THE LAST HOUR. 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 3937 10501 3934 10483 3919 10488 3920 10501 $$
2 follow-up statements
469 WGUS75 KBOU 062228 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 428 PM MDT FRI JUL 6 2012 COC035-070030- /O.CON.KBOU.FF.W.0011.000000T0000Z-120707T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DOUGLAS CO- 428 PM MDT FRI JUL 6 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MDT FOR CENTRAL DOUGLAS COUNTY... AT 425 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 7 MILES NORTHEAST OF PERRY PARK...OR ABOUT 28 MILES SOUTH OF DENVER. THIS STORM WAS MOVING NORTH AT 5 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PERRY PARK. AUTOMATED RAIN GAUGES INDICATE THAT 2.44 INCHES OF RAIN HAS FALLEN ALONG TOMAH ROAD FROM THIS STORM IN THE LAST 90 MINUTES. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... PLUM CREEK...EAST PLUM CREEK...CARPENTER CREEK...COOK CREEK...GARBER CREEK...JACKSON CREEK...DRY GULCH...SPRING CREEK...BEAR CREEK AND GOVE CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER CLIMB TO HIGHER GROUND. && LAT...LON 3937 10501 3934 10483 3919 10488 3920 10501 $$
263 WGUS75 KBOU 062357 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 557 PM MDT FRI JUL 6 2012 COC035-070004- /O.CAN.KBOU.FF.W.0011.000000T0000Z-120707T0030Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DOUGLAS CO- 557 PM MDT FRI JUL 6 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL DOUGLAS COUNTY... THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. IN ADDITION...NO REPORTS OF FLASH FLOODING HAVE BEEN RECIEVED FROM THE PERRY PARK AREA. THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELLED. ADDITIONAL THUNDERSTORMS MAY MOVE BACK INTO DOUGLAS COUNTY LATER THIS EVENING SO CONTINUE TO MONITOR YOU LOCAL TELEVISION STATION OR NOAA WEATHER RADIO FOR THE LATEST UPDATES. LAT...LON 3937 10501 3934 10483 3919 10488 3920 10501 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 6, 12:45 PM MDT | Areal Flood Advisory | BOU | Larimer | 90 min |
| Jul 6, 1:06 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jul 6, 1:55 PM MDT | Areal Flood Advisory | BOU | Jefferson, Park | 80 min |
| Jul 6, 2:12 PM MDT | Areal Flood Advisory | BOU | Larimer | 93 min |
| Jul 6, 3:23 PM MDT | Areal Flood Advisory | BOU | Douglas | 82 min |
| Jul 6, 4:22 PM MDT | Areal Flood Advisory | BOU | Larimer | 83 min |
| Jul 6, 4:36 PM MDT | Areal Flood Advisory | BOU | Boulder | 63 min |
| Jul 6, 4:52 PM MDT | Areal Flood Advisory | BOU | Douglas | 83 min |
| Jul 6, 5:38 PM MDT | Flash Flood Warning | BOU | Larimer | 103 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.