Flash Flood Warning 3, NWS Denver/Boulder, CO

Issued

Jun 6, 2012, 9:53 PM MDT (03:53 UTC)

Expired

Jun 6, 2012, 11:15 PM MDT

In force

82 min

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Flood severity

None

County Larimer County, CO

The Cheyenne radar (KCYS), 61 km from the middle of the area, began a volume at 03:57 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.

272 
WGUS55 KBOU 070353
FFWBOU
COC069-070515-
/O.NEW.KBOU.FF.W.0003.120607T0353Z-120607T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
953 PM MDT WED JUN 6 2012

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL LARIMER COUNTY IN NORTH CENTRAL COLORADO
  INCLUDING THE HEWLETT BURN AREA

* UNTIL 1115 PM MDT

* AT 951 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM OVER CENTRAL LARIMER           
  COUNTY...OR 14 MILES NORTHWEST OF FORT COLLINS MOVING INTO THE     
  HEWLETT BURN AREA. THIS STORM WAS MOVING EAST AT 10 MPH.

* THE STORM PRODUCING VERY HEAVY RAIN WILL REMAIN OVER MAINLY RURAL
  AREAS OF THE WARNED COUNTY.

DOPPLER RADAR ESTIMATES THAT AROUND ONE INCH OF RAIN MAY FALL
IN THE HEWLETT BURN AREA IN THE NEXT 45 MINUTES.

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 THE HEWLETT BURN AREA.

&&

LAT...LON 4077 10526 4073 10521 4067 10528 4072 10534

$$

442 
WGUS75 KBOU 070421
FFSBOU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1021 PM MDT WED JUN 6 2012

COC069-070515-
/O.CON.KBOU.FF.W.0003.000000T0000Z-120607T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LARIMER CO-
1021 PM MDT WED JUN 6 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM MDT FOR 
CENTRAL LARIMER COUNTY INCLUDING THE HEWLETT BURN AREA...

AT 1019 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM A THUNDERSTORM OVER EAST CENTRAL LARIMER 
COUNTY...OR ABOUT 12 MILES NORTHWEST OF FORT COLLINS. THIS STORM WAS 
OVER THE HEWLETT BURN AREA AND WAS MOVING EAST AT 10 MPH.

THE STORM PRODUCING VERY HEAVY RAIN WILL REMAIN OVER MAINLY RURAL
AREAS OF THE WARNED COUNTY.

DOPPLER RADAR ESTIMATES THAT AROUND ONE INCH OF RAIN MAY FALL FROM 
THIS STORM IN THE HEWLETT BURN AREA.

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 HEWLETT BURN AREA.

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 4077 10526 4073 10521 4067 10528 4072 10534

$$

255 
WGUS75 KBOU 070512
FFSBOU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1112 PM MDT WED JUN 6 2012

COC069-070522-
/O.EXP.KBOU.FF.W.0003.000000T0000Z-120607T0515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LARIMER CO-
1112 PM MDT WED JUN 6 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1115 PM MDT FOR CENTRAL
LARIMER COUNTY...

THE STORM THAT PROMPTED THE WARNING HAS EXITED THE AREA.

LAT...LON 4077 10526 4073 10521 4067 10528 4072 10534

$$

Flash Flood Warnings in Colorado, 2012Every flash flood warning in 2012

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.