Flash Flood Warning 14, NWS Denver/Boulder, CO

Issued

Jul 14, 2001, 7:38 PM MDT (01:38 UTC)

Expired

Jul 14, 2001, 8:50 PM MDT

In force

72 min

Issued by

NWS Denver/Boulder, CO

Area

Whole counties; the outline is the Mesonet’s reconstruction

Counties Logan County, CO, Morgan County, CO, Washington County, CO

The Denver radar (KFTG), 155 km from the middle of the area, began a volume at 01:38 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.

000 
WGUS55 KBOU 150140
FFWBOU
COC075-087-121-150250-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE DENVER CO
738 PM MDT SAT JUL 14 2001

THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN LOGAN COUNTY IN NORTHEAST COLORADO
  THIS INCLUDES THE CITY OF STERLING
  EAST CENTRAL MORGAN COUNTY IN NORTHEAST COLORADO
  NORTHERN WASHINGTON COUNTY IN NORTHEAST COLORADO

* UNTIL 850 PM MDT

* AT 738 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM ILIFF TO BRUSH...OR FROM 15 MILES NORTHEAST OF
  STERLING TO 8 MILES EAST OF FORT MORGAN. THE STORMS PRODUCING
  THE VERY HEAVY RAIN WAS MOVING EAST AT 20 MPH.

LOCATIONS IN THE WARNING INCLUDE...BUT ARE NOT LIMITED TO...
STERLING...ATWOOD...BRUSH...BURDETT...CROOK...FLEMING...HILLROSE...
ILIFF...MERINO...MIDWAY...PREWITT RESERVOIR...PROCTOR...SNYDER...ST
PETERSBURG AND TWIN BUTTES.

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. IF YOUR VEHICLE STALLS ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

DOPPLER RADAR ESTIMATES THAT AROUND 3.5 INCHES OF RAIN HAS FALLEN FROM
STORMS ALONG THIS LINE IN THE LAST HOUR.

FLASH FLOODING HAS ALREADY OCCURRED IN PORTIONS OF LOGAN COUNTY.

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 4090 10311 4060 10323 4021 10375 4020 10297
          4045 10279 4047 10271 4092 10266
BAKER

NWS Denver/Boulder, CO wrote its last area forecast discussion before this flash flood warning went out at Jul 14, 3:10 PM MDT, 4 hours 28 minutes earlier.

NORTHEAST AND NORTH CENTRAL COLORADO AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DENVER COLORADO
310 PM MDT SAT JUL 14 2001

SHORT TERM DISCUSSION:  CURRENTLY...BEST CONVECTION OVER THE
FOOTHILLS...BUT STILL ONLY MINIMAL COVERAGE.  THERE AREA COUNTLESS
BOUNDARIES FLOATING AROUND ACCORDING THE AREA RADARS.  LATEST ACARS
AND FORECAST SOUNDINGS STILL SHOWING A MIDDLE LEVEL CAPS.  PLENTY OF
CAPE OVER THE PLAINS...2000 JOULES PLUS.  WATER VAPOR PICTURE DO
SHOW A SYNOPTIC SCALE FEATURE TO ENHANCE STORMS THIS EVENING.   WILL
LEAVE FORECAST PRETTY MUCH AS IS...WATCH IS OK SO FAR.

LONG TERM DISCUSSION:  PERSISTENCE.  UPPER RIDGE STAYS
SOUTH-SOUTHEAST OF US THROUGH THE PERIOD.  MOISTURE GRIDS/CROSS
SECTIONS SHOW LOW LEVEL DRYING FOR SUNDAY INTO MONDAY.  EVEN SOME
MIDDLE AND UPPER LEVEL DRYING ON SUNDAY.   WATER VAPOR PICTURES DO
SHOW A BIT OF A "PINCHING OFF" OF THE SOUTHWESTERN MOISTURE
STREAM...BUT THEN THERE'S QUITE MOVING OUR WAY FROM THE SOUTHEAST
GULF OF MEXICO AREA.  THE LOW LEVEL DRYING SEEMS TO BE ASSOCIATED
WITH SOME SYNOPTIC SCALE SUBSIDENCE AND ASSOCIATED DOWNSLOPING ON
SUNDAY.  NOT CONVINCED IT WILL PUSH THAT FAR EAST INTO KANSAS AND
LEAVE US WITH UPPER 30S/LOWER 40S SURFACE DEW POINTS...ESPECIALLY
WITH ALL THE GROUND MOISTURE RIGHT NOW.  WILL STILL GO WITH 30% POPS
FOR NOW.  MONDAY'S GRIDS SHOW IS MOISTENING UP A BIT...SO "SCATTERED
POPS AGAIN.  FOR TEMPERATURES...GRIDS SHOW A BIT OF WARM-UP WITH THE
DRYING ON SUNDAY...SIMILAR READINGS FOR MONDAY.

IN THE EXTENDED PERIOD...MODELS SHOW UPPER RIDGE CENTER STAYING
SOUTH-EAST TO SOUTH-SOUTHEAST OF COLORADO THROUGH THE PERIOD.
VARIOUS MODELS SHOW VARIOUS AMOUNTS OF MOISTURE AT VARIOUS
LEVEL...BUT WITH HEMISPHERIC WATER VAPOR SATELLITE PICTURES IN
MIND...WILL GO WITH "CHANCE" THROUGH THE PERIOD.  TEMPERATURES WILL
CHANGE LITTLE FROM CURRENT READINGS...MAYBE A LITTLE WARMER FOR THE
LATER HALF OF THE WEEK.     RJK

.DEN...FLASH FLOOD WATCH FOR ZONES 34..36..38>51.

In the hours before

COZ047-150140-

SPECIAL WEATHER STATMENT
COLORADO NATIONAL WEATHER SERVICE DENVER COLORADO
735 PM MDT SAT JUL 14 2001

SEVERE THUNDERSTORM WATCH FOR SOUTHERN PORTIONS OF LINCOLN COUNTY
HAS BEEN CANCELLED.  THE THREAT OF SEVERE THUNDERSTORMS HAS
DIMINISHED OVER SOUTHERN LINCOLN COUNTY.

RPK

Flash Flood Warnings in Colorado, 2001Every flash flood warning in 2001

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.