Alert archive / Colorado / Flash Flood Warnings in 2012
Flash Flood Warning 22, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jul 27, 2012, 1:07 PM MDT for Larimer County, Colorado. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 27, 2012, 1:07 PM MDT (19:07 UTC)
- Expired
- Jul 27, 2012, 4:00 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 19:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 27, 1:50 PM MDT | FLASH FLOOD | 2 E Mishowaka, CO | EASTBOUND HIGHWAY 14 AT MILE MARKER 106 IS COMPLETELY BLOCKED BY DEBRIS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 7.1 hours before the alert went out and 206 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
- 2426 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- -29 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
137 WGUS55 KBOU 271907 FFWBOU COC069-272200- /O.NEW.KBOU.FF.W.0022.120727T1907Z-120727T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE DENVER CO 107 PM MDT FRI JUL 27 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 102 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 6 MILES SOUTHWEST OF MISHOWAKA...OR 19 MILES WEST OF FORT COLLINS. THIS STORM WAS MOVING NORTHEAST AT 10 MPH. * LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE HIGH PARK BURN AREA...MISHOWAKA AND BUCKHORN MOUNTAIN. DOPPLER RADAR ESTIMATES THAT RAIN FROM THE STORM IS FALLING AT THE RATE OF AROUND ONE INCH PER HOUR. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... CACHE LA POUDRE RIVER...SOUTH FORK CACHE LA POUDRE RIVER... PENDERGRASS CREEK...BENNETT CREEK...GORDON CREEK...REDSTONE CREEK AND BUCKHORN CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... 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 THE HIGH PARK BURN AREA. TO REPORT ANY FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN DENVER. && LAT...LON 4067 10552 4072 10532 4060 10531 4058 10552 $$
3 follow-up statements
249 WGUS75 KBOU 271925 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 125 PM MDT FRI JUL 27 2012 COC069-272200- /O.CON.KBOU.FF.W.0022.000000T0000Z-120727T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 125 PM MDT FRI JUL 27 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR CENTRAL LARIMER COUNTY... AT 122 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM 2 MILES NORTHEAST OF MISHOWAKA...OR ABOUT 17 MILES NORTHWEST OF FORT COLLINS. THIS STORM WAS MOVING NORTHEAST AT 10 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISHOWAKA AND BUCKHORN MOUNTAIN AS WELL AS THE WESTERN HALF OF THE HIGH PARK BURN AREA. DOPPLER RADAR ESTIMATES THAT RAIN FROM THE STORM IS FALLING AT THE RATE OF ONE INCH PER HOUR. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... CACHE LA POUDRE RIVER...SOUTH FORK CACHE LA POUDRE RIVER... PENDERGRASS CREEK...PENNOCK CREEK...BENNETT CREEK...GORDON CREEK... REDSTONE CREEK AND BUCKHORN CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS...AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER DEBRIS FLOWS OR ROCK SLIDES IN THE WESTERN HALF OF THE HIGH PARK BURN AREA. && LAT...LON 4067 10552 4072 10532 4060 10531 4058 10552 $$
011 WGUS75 KBOU 272005 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 205 PM MDT FRI JUL 27 2012 COC069-272200- /O.CON.KBOU.FF.W.0022.000000T0000Z-120727T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 205 PM MDT FRI JUL 27 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MDT FOR CENTRAL LARIMER COUNTY... AT 150 PM MDT...THE LARIMER COUNTY EMERGENCY MANAGER REPORTED THE EASTBOUND LANE OF HIGHWAY 14 AT MILE MARKER 106...ABOUT 2 MILES EAST OF MISHOWAKA...WAS COMPLETELY BLOCKED BY DEBRIS. MISHOWAKA IS ABOUT 16 MILES NORTHWEST OF FORT COLLINS. THE STORMS WERE MOVING NORTHEAST AT 10 MPH. LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MISHOWAKA...BUCKHORN MOUNTAIN AND THE WESTERN HALF OF THE HIGH PARK BURN AREA. DOPPLER RADAR ESTIMATES THAT 1 TO 1.25 INCHES OF RAIN HAS FALLEN IN THE LAST 60 MINUTES...HEAVIEST SOUTH AND EAST OF MISHOWAKA...IN THE THE HIGH PARK BURN AREA. THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... CACHE LA POUDRE RIVER...SOUTH FORK CACHE LA POUDRE RIVER... PENDERGRASS CREEK...PENNOCK CREEK...BENNETT CREEK...GORDON CREEK... REDSTONE CREEK AND BUCKHORN CREEK. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS AND STREAMS...ROADS...AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO TRIGGER DEBRIS FLOWS OR ROCK SLIDES IN THE HIGH PARK BURN AREA. 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 4067 10552 4072 10532 4060 10531 4058 10552 $$
149 WGUS75 KBOU 272155 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 355 PM MDT FRI JUL 27 2012 COC069-272205- /O.EXP.KBOU.FF.W.0022.000000T0000Z-120727T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ LARIMER CO- 355 PM MDT FRI JUL 27 2012 ...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM MDT FOR CENTRAL LARIMER COUNTY... THE STORMS THAT PROMPTED THE WARNING HAS EXITED THE AREA. THEREFORE THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. LAT...LON 4067 10552 4072 10532 4060 10531 4058 10552 $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 12:07 PM MDT | Areal Flood Advisory | BOU | Boulder | 21 min |
| Jul 27, 12:38 PM MDT | Areal Flood Advisory | BOU | Larimer | 82 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.