Flash Flood Warning 15, NWS Denver/Boulder, CO

Issued

Jul 12, 2011, 8:44 PM MDT (02:44 UTC)

Expired

Jul 12, 2011, 10:45 PM MDT

In force

2 hr

Issued by

NWS Denver/Boulder, CO

Area

Storm-based polygon

Flood severity

None

County Weld County, CO

The Cheyenne radar (KCYS), 59 km from the middle of the area, began a volume at 02:46 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.

687 
WGUS55 KBOU 130244
FFWBOU
COC123-130445-
/O.NEW.KBOU.FF.W.0015.110713T0244Z-110713T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
844 PM MDT TUE JUL 12 2011

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL WELD COUNTY IN NORTHEAST COLORADO

* UNTIL 1045 PM MDT

* AT 839 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM A THUNDERSTORM 9 MILES NORTHEAST OF PURCELL...
  OR 26 MILES NORTHEAST OF GREELEY. THIS STORM WAS MOVING NORTHEAST
  AT 15 MPH.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PURCELL.

DOPPLER RADAR ESTIMATES THAT AROUND TWO AND ONE-HALF INCHES OF RAIN 
HAS FALLEN FROM THIS STORM IN THE LAST HOUR. 

CREEKS AND STREAMS COVERED BY THIS WARNING INCLUDE COAL CREEK...SAND 
CREEK...WILD HORSE CREEK...WILLOW CREEK...GEARY CREEK AND CROW 
CREEK.     

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 SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

&&

LAT...LON 4072 10456 4087 10445 4080 10432 4062 10437
      4053 10442 4058 10460

$$


BAKER

158 
WGUS75 KBOU 130416
FFSBOU

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
1016 PM MDT TUE JUL 12 2011

COC123-130445-
/O.CON.KBOU.FF.W.0015.000000T0000Z-110713T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WELD CO-
1016 PM MDT TUE JUL 12 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM MDT FOR
CENTRAL WELD COUNTY...

AT 1001 PM MDT...NATIONAL WEATHER SPOTTER REPORTED 1.0 INCH OF 
RAINFALL IN 5 MINUTES. 

AT 1010 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
VERY HEAVY RAIN FROM A THUNDERSTORM 6 MILES NORTHEAST OF PURCELL...OR
ABOUT 23 MILES NORTHEAST OF GREELEY. THIS STORM WAS MOVING NORTHEAST 
AT 20 MPH.

LOCATIONS REMAINING IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
PURCELL.

DOPPLER RADAR ESTIMATES THAT 2 TO 3 INCHES OF RAIN HAS FALLEN FROM 
STORMS IN THE LAST HOUR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4072 10456 4087 10445 4080 10432 4062 10437
      4053 10442 4058 10460

$$

Flash Flood Warnings in Colorado, 2011Every flash flood warning in 2011

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.