Alert archive / Colorado / Flash Flood Warnings in 2015
Flash Flood Warning 13, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at Jun 11, 2015, 1:31 PM MDT for Larimer 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 outline as issued.
The facts
- Issued
- Jun 11, 2015, 1:31 PM MDT (19:31 UTC)
- Expired
- Jun 11, 2015, 5:30 PM MDT
- In force
- 4 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Larimer County, CO
The radar
The Cheyenne radar (KCYS), 50 km from the middle of the area, began a volume at 19:32 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 (KDEN), launched 12:00Z, 7.5 hours before the alert went out and 182 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
- 125 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 884 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- 26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
493
WGUS55 KBOU 111931
FFWBOU
COC069-112330-
/O.NEW.KBOU.FF.W.0013.150611T1931Z-150611T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
131 PM MDT THU JUN 11 2015
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN LARIMER COUNTY IN NORTH CENTRAL COLORADO...
* UNTIL 530 PM MDT
* AT 129 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN OVER WELLINGTON. THE RAIN IS MOVING SOUTHEAST AT 10 MPH.
FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
NORTHEASTERN FORT COLLINS AND WELLINGTON.
* A RAIN GAUGE IN OWL CANYON REPORTED 1.73 INCHES OF RAIN IN 30
MINUTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4081 10498 4078 10494 4057 10494 4058 10503
4063 10511 4076 10514 4087 10524 4089 10505
$$
RJK2 follow-up statements
334
WGUS75 KBOU 112035
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
235 PM MDT THU JUN 11 2015
COC069-112330-
/O.CON.KBOU.FF.W.0013.000000T0000Z-150611T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LARIMER CO-
235 PM MDT THU JUN 11 2015
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM MDT FOR
NORTHEASTERN LARIMER COUNTY...
AT 234 PM MDT...THUNDERSTORMS PRODUCING HEAVY RAIN HAD MOVED OUT OF
THE WARNING AREA. MAINLY LIGHT TO MODERATE RAIN CONTINUED. RADAR
INDICATES AS MUCH AS 2 INCHES OF RAIN FELL IN A SHORT TIME EARLIER
THIS AFTERNOON AROUND OWL CANYON...AS WELL AS NORTHWEST OF
BUCKEYE...AND SOUTHEAST OF WELLINGTON.
SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
WELLINGTON...OWL CANYON...AND BUCKEYE.
THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...STONEWALL
CREEK...NORTH FORK CACHE LA POUDRE RIVER...RAWHIDE CREEK...PARK
CREEK...DRY CREEK...COAL CREEK...LONETREE CREEK AND BOXELDER CREEK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4081 10498 4078 10494 4057 10494 4057 10498
4063 10500 4067 10512 4076 10514 4087 10524
4089 10505
$$
BARJENBRUCH914
WGUS75 KBOU 112146
FFSBOU
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
346 PM MDT THU JUN 11 2015
COC069-112154-
/O.CAN.KBOU.FF.W.0013.000000T0000Z-150611T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LARIMER CO-
346 PM MDT THU JUN 11 2015
...THE FLASH FLOOD WARNING FOR NORTHEASTERN LARIMER COUNTY IS
CANCELLED...
THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO
POSE A THREAT. NORTHERN LARIMER COUNTY WILL SEE STEADY RAIN DURING
THE NEXT COUPLE OF HOURS.
LAT...LON 4081 10498 4078 10494 4057 10494 4057 10498
4063 10500 4067 10512 4076 10514 4087 10524
4089 10505
$$
THThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 10, 8:43 PM MDT | Tornado Warning | BOU | Phillips | 37 min |
| Jun 11, 10:35 AM MDT | River Flood Warning | BOU | Jefferson | 55 hr |
| Jun 11, 10:35 AM MDT | River Flood Warning | BOU | Adams | 43 hr |
| Jun 11, 10:35 AM MDT | River Flood Warning | BOU | Logan, Morgan, Washington | 5 days |
| Jun 11, 10:35 AM MDT | River Flood Warning | BOU | Larimer | 3 days |
| Jun 11, 10:35 AM MDT | River Flood Warning | BOU | Larimer | 45 hr |
| Jun 11, 12:16 PM MDT | River Flood Advisory | BOU | Sedgwick | 8 days |
| Jun 11, 12:16 PM MDT | River Flood Advisory | BOU | Douglas | 36 hr |
| Jun 11, 1:35 PM MDT | River Flood Advisory | BOU | Boulder | 30 hr |
| Jun 11, 2:24 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jun 11, 2:26 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 34 min |
| Jun 11, 3:05 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| Jun 11, 3:23 PM MDT | River Flood Advisory | BOU | Larimer | 5 days |
| Jun 11, 4:15 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 30 min |
| Jun 11, 4:58 PM MDT | Areal Flood Advisory | BOU | Douglas, Jefferson | 3 hr |
| Jun 11, 5:15 PM MDT | Flash Flood Warning | BOU | Arapahoe, Douglas, Elbert | 3 hr |
| Jun 11, 5:27 PM MDT | Flash Flood Warning | BOU | Washington | 4 hr |
Nearby
Flash Flood Warnings in Colorado, 2015Every flash flood warning in 2015
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.