Alert archive / Colorado / Flash Flood Warnings in 2014
Flash Flood Warning 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this flash flood warning at May 23, 2014, 7:20 PM MDT for Boulder 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
- May 23, 2014, 7:20 PM MDT (01:20 UTC)
- Expired
- May 23, 2014, 10:15 PM MDT
- In force
- 3 hr
- Issued by
- NWS Denver/Boulder, CO
- Area
- Storm-based polygon
- Flood severity
- None
County Boulder County, CO
The radar
The Denver radar (KFTG), 75 km from the middle of the area, began a volume at 01:19 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 00:00Z, 1.3 hours before the alert went out and 183 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
- 530 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 1524 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -72 m²/s²
- 0-3 km storm-relative helicity
- -15 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
645
WGUS55 KBOU 240120
FFWBOU
COC013-240415-
/O.NEW.KBOU.FF.W.0002.140524T0120Z-140524T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
720 PM MDT FRI MAY 23 2014
THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A
* FLASH FLOOD WARNING FOR...
CENTRAL BOULDER COUNTY IN CENTRAL COLORADO...
* UNTIL 1015 PM MDT
* AT 718 PM MDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
HEAVY RAIN OVER CRISMAN. THE RAIN IS MOVING NORTHWEST AT 15 MPH.
FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. EXCESSIVE RAINFALL
OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW MOVING THROUGH THE
FOUR MILE BURN AERA. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...
VEGETATION AND OTHER LOOSE MATERIALS.
* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SUMMERVILLE...SALINA...CRISMAN...GOLD HILL...SUNSHINE AND
WALLSTREET.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A LIFE THREATENING SITUATION. HEAVY RAINFALL WILL CAUSE
EXTENSIVE AND SEVERE FLASH FLOODING OF CREEKS...STREAMS...AND DITCHES
IN THE FOURMILE BURN AREA. SOME DRAINAGE BASINS IMPACTED INCLUDE
FOURMILE CREEK...GOLD RUN...AND FOURMILE CANYON CREEK. SEVERE DEBRIS
FLOWS CAN ALSO BE ANTICIPATED ACROSS ROADS. ROADS AND DRIVEWAYS MAY
BE WASHED AWAY IN PLACES. IF YOU ENCOUNTER FLOOD WATERS...CLIMB TO
SAFETY.
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.
MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.
&&
LAT...LON 4000 10535 4004 10544 4009 10538 4006 10529
$$
ENTREKIN2 follow-up statements
078 WGUS75 KBOU 240203 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 803 PM MDT FRI MAY 23 2014 COC013-240415- /O.CON.KBOU.FF.W.0002.000000T0000Z-140524T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BOULDER CO- 803 PM MDT FRI MAY 23 2014 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM MDT FOR CENTRAL BOULDER COUNTY... AT 758 PM MDT...A THUNDERSTORM PRODUCING HEAVY RAIN WAS LOCATED OVER CRISMAN...OR 30 MILES NORTHWEST OF DENVER...AND IS STATIONARY. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. EXCESSIVE RAINFALL OVER THE BURN SCAR WILL RESULT IN DEBRIS FLOW MOVING THROUGH FOUR MILE CREEK. THE DEBRIS FLOW CAN CONSIST OF ROCK...MUD...VEGETATION AND OTHER LOOSE MATERIALS. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... SUMMERVILLE...SALINA...CRISMAN...GOLD HILL...SUNSHINE AND WALLSTREET. SPOTTERS AND AUTOMATED RAIN GAUGES HAVE REPORTED AROUND A HALF INCH OF RAIN IN THE PAST 45 MINUTES. ADDITIONAL STORMS WILL CONTINUE TO MOVE NORTHWARD ACROSS THE BURN AREA AND CONTINUE TO CREATE FLASH FLOODING. PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF CREEKS...STREAMS...AND DITCHES IN THE FOURMILE BURN AREA. SOME DRAINAGE BASINS AFFECTED BY EXCESSIVE RUNOFF INCLUDE FOURMILE CREEK...GOLD RUN...AND FOURMILE CANYON CREEK. WATER WILL BE FLOWING DOWN ROADWAYS. ROCK SLIDES OR DEBRIS FLOWS CAN ALSO BE EXPECTED. && LAT...LON 4000 10535 4004 10544 4009 10538 4006 10529 $$ ENTREKIN
282 WGUS75 KBOU 240251 FFSBOU FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE DENVER CO 851 PM MDT FRI MAY 23 2014 COC013-240258- /O.CAN.KBOU.FF.W.0002.000000T0000Z-140524T0415Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BOULDER CO- 851 PM MDT FRI MAY 23 2014 ...THE FLASH FLOOD WARNING FOR CENTRAL BOULDER COUNTY IS CANCELLED... THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO POSE A THREAT OVER THE FOUR MILE BURN AREA. EMERGENCY MANGERS HAVE REPORTED SOME DEBRIS FLOW ON THE NORTHEAST PORTIONS OF FOUR MILE BURN BUT NO MAJOR FLOODING PROBLEMS. LAT...LON 4000 10535 4004 10544 4009 10538 4006 10529 $$ ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 6:05 PM MDT | Areal Flood Advisory | BOU | Adams, Arapahoe, Denver | 115 min |
| May 23, 7:21 PM MDT | Flash Flood Warning | BOU | Larimer | 3 hr |
| May 23, 8:10 PM MDT | Flash Flood Warning | BOU | Larimer, Weld | 3 hr |
| May 23, 9:20 PM MDT | Areal Flood Advisory | BOU | Weld | 4 hr |
| May 23, 10:06 PM MDT | Areal Flood Warning | BOU | Larimer | 4 hr |
| May 23, 10:10 PM MDT | Flash Flood Warning | BOU | Weld | 3 hr |
| May 23, 10:26 PM MDT | Areal Flood Advisory | BOU | Adams, Denver, Weld | 3 hr |
| May 23, 11:09 PM MDT | Areal Flood Advisory | BOU | Larimer | 96 min |
| May 24, 5:50 AM MDT | Flash Flood Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 17 hr |
| May 24, 4:42 PM MDT | Special Weather Statement | BOU | Grand | 33 min |
| May 24, 5:11 PM MDT | Special Weather Statement | BOU | Jackson | 34 min |
| May 24, 5:37 PM MDT | Special Weather Statement | BOU | Jefferson | 23 min |
| May 24, 5:58 PM MDT | Special Weather Statement | BOU | Douglas | 47 min |
Nearby
Flash Flood Warnings in Colorado, 2014Every flash flood warning in 2014
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.