Flash Flood Warning 31, NWS Salt Lake City, UT

000 
WGUS75 KSLC 100156
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
756 PM MDT TUE AUG 9 2005

UTC029-100245-
MORGAN UT-
756 PM MDT TUE AUG 9 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 845 PM MDT FOR SOUTH CENTRAL
MORGAN COUNTY...

THE THUNDERSTORM PRODUCING THE EXCESSIVE RAINFALL IN THE EAST CANYON 
RESERVOIR AREA HAS WEAKENED SINCE 745 PM. RADAR RAINFALL ESTIMATES 
AROUND THE RESERVOIR RANGE BETWEEN 1.50 AND 2.70 INCHES SINCE 630 
PM.  VERY HEAVY RUNOFF BACK TOWARD THE RESERVOIR WILL CONTINUE 
THROUGH 845 PM. 

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.

FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE
YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME
KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR
CREEKS.

LAT...LON 4084 11164 4083 11156 4094 11152 4094 11165

$$

000 
WGUS75 KSLC 100256
FFSSLC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
842 PM MDT TUE AUG 9 2005

UTC029-100305-
MORGAN UT-
852 PM MDT TUE AUG 9 2005

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL MORGAN COUNTY EXPIRES AT
845 PM MDT...

THE THUNDERSTORM THAT BROUGHT HEAVY RAIN TO THE EAST CANYON 
RESERVOIR AREA HAS WEAKENED AND MOVED OFF TO THE EAST.  RADAR 
RAINFALL ESTIMATES APPROACHING 2.70 INCHES WERE RECORDED.

FLASH FLOODING ON THE SMALL STREAMS AND WASHES THAT FEED EAST CANYON 
RESERVOIR WILL SUBSIDE OVER THE NEXT HOUR.  WATER MAY STILL BE 
FLOWING FAST THROUGH THOSE AREAS...SO DO NOT ATTEMPT TO CROSS FAST 
FLOWING WATER...EITHER IN AN AUTOMOBILE OR ON FOOT.

LAT...LON 4084 11164 4083 11156 4094 11152 4094 11165

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
300 PM MDT TUE AUG 9 2005

.SYNOPSIS...MOISTURE WILL REMAIN OVER THE AREA THROUGH WEDNESDAY. A
DRYING TREND FROM THE NORTH WILL BEGIN THURSDAY BUT MOISTURE WILL
REMAIN OVER THE SOUTHERN PORTION OF THE AREA THROUGH THE REMAINDER
OF THE WEEK.

&&

.DISCUSSION...REMNANT CLOUD COVER OVER THE SOUTH HAS DELAYED ONSET
OF CONVECTION OVER THAT AREA THUS FAR THIS AFTERNOON...BUT ACTIVITY
NOW GETTING GOING AND EXPECT IT TO CONTINUE WELL INTO THE NIGHT
GIVEN THE VERY HIGH MOISTURE CONTENT OF THE AIRMASS.

NORTH OF ABOUT I-70 CONVECTION HAS BEEN GOING FOR A FEW HOURS IN
MANY OF THE USUAL TERRAIN INDUCED SPOTS. ACTIVITY ACROSS NE NV THIS
AFTERNOON LENDS SOME CREDIBILITY TO THE 12Z ETA IDEA OF A SHORT WAVE
TROUGH AT 500 MB AND ABOVE MOVING INTO NW UT LATE AFTERNOON/EVENING.
WITH AMPLE MOISTURE STILL IN PLACE OVER THE AREA...CONVECTION LIKELY
TO PERSIST WELL PAST DARK.

WEDNESDAY LOOKS TO BE POTENTIALLY BIG DAY FOR STORMS AS 300 MB JET
ENTRANCE REGION TO BE DIRECTLY OVER THE AREA AND AIRMASS WILL
CONTINUE TO BE QUITE UNSTABLE...ESPECIALLY OVER THE SOUTHWEST WHERE
LATEST 18Z ETA SHOWS AROUND 2000 J/KG CAPE WED AFTERNOON. ENOUGH
SHEAR ACROSS N. UT FOR POTENTIALLY SEVERE STORMS...BUT BEST
INSTABILITY WILL BE SOUTH OF JET AXIS OVER CENTRAL/SOUTHERN UT.

DRYING TREND BEGINS THURSDAY OVER THE NORTH...MORE SO ON THE
GFS...AND 18Z ETA THAN ON THE 12Z ETA. MODELS ARE OFTEN ABOUT A DAY
TOO FAST ON DRYING US OUT...BUT IDEA OF DRYING OVER THE NORTH LOOKS
OK...WITH SLOWEST SOLUTION PREFERRED. VERY LITTLE DRYING OVER THE
SOUTH THROUGH THE REST OF THE WEEK WITH DIFFERENT MODEL SOLUTIONS
HANDLING UPPER CIRCULATION OVER NW AZ DIFFERENTLY...BUT ALL
INDICATED CONTINUED CONVECTIVE ACTIVITY OVER THE SOUTH AT LEAST
THROUGH FRIDAY AND PROBABLY LONGER.

&&

.AVIATION...SEE SLCTAFSLC

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...NONE.
WY...NONE.

&&

DUNN