Alert archive / Colorado / Flash Flood Warnings in 2012
Flash Flood Warning 10, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 6, 2012, 1:06 PM MDT for Larimer 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 outline as issued.
The facts
- Issued
- Jul 6, 2012, 1:06 PM MDT (19:06 UTC)
- Expired
- Jul 6, 2012, 3:40 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 77 km from the middle of the area, began a volume at 19:07 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, 7.1 hours before the alert went out and 219 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.
058 WGUS55 KBOU 061906 FFWBOU COC069-062200- /O.NEW.KBOU.FF.W.0010.120706T1906Z-120706T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 106 PM MDT FRI JUL 6 2012 THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL LARIMER COUNTY IN NORTH CENTRAL COLORADO * UNTIL 400 PM MDT * AT 104 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM NEAR RUSTIC...OR 26 MILES WEST OF FORT COLLINS. THIS STORM WAS NEARLY STATIONARY. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RUSTIC. DOPPLER RADAR ESTIMATES THAT 1.5 TO 2.5 INCHES OF RAIN HAS FALLEN FROM A SERIES OF STORMS MOVING OVER THE AREA SINCE 1130 AM MDT. THE HIGH PARK BURN SCAR IS NOT INCLUDED IN THE WARNING AT THIS TIME...BUT RESIDENTS IN THE BURN AREA SHOULD REMAIN ALERT TO CHANGING WEATHER CONDITIONS. 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. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN. && LAT...LON 4081 10557 4080 10542 4063 10555 4063 10562 $$
2 follow-up statements
747 WGUS75 KBOU 061940 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 140 PM MDT FRI JUL 6 2012 COC069-062200- /O.CON.KBOU.FF.W.0010.000000T0000Z-120706T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 140 PM MDT FRI JUL 6 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR CENTRAL LARIMER COUNTY... AT 135 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN HAD FALLEN FROM A SERIES OF THUNDERSTORMS IN THE VICINITY OF RUSTIC...OR ABOUT 27 MILES WEST OF FORT COLLINS. THE STORMS WERE MOVING TO THE NORTH AT 10 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RUSTIC. RIVER BASINS AFFECTED BY THE HEAVY RAIN INCLUDE THE CACHE LA POUDRE RIVER AND MANHATTAN CREEK...BETWEEN RUSTIC TO JUST SOUTHEAST OF RED FEATHER LAKES. DOPPLER RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN HAS FALLEN FROM THESE STORM SINCE 1130 AM MDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER ROCK SLIDES OR DEBRIS FLOWS IN STEEP TERRAIN. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS... OR CREEKS...WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. && LAT...LON 4081 10557 4080 10542 4063 10555 4063 10562 $$
294 WGUS75 KBOU 062140 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 340 PM MDT FRI JUL 6 2012 COC069-062150- /O.CAN.KBOU.FF.W.0010.000000T0000Z-120706T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 340 PM MDT FRI JUL 6 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL LARIMER COUNTY... THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA. LAT...LON 4081 10557 4080 10542 4063 10555 4063 10562 $$
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, 1:55 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, 3:36 PM MDT | Flash Flood Warning | BOU | Douglas | 2 hr |
| 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.