Flash Flood Warning 14, NWS Riverton, WY

000 
WGUS75 KRIW 170216
FFSRIW
WYC023-170315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
812 PM MDT SAT AUG 16 2003

...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN LINCOLN COUNTY
UNTIL 915 PM MDT...

AT 808 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WERE CONTINUING TO PRODUCE HEAVY RAIN ABOUT 6 MILES 
SOUTHEAST OF SAGE JUNCTION. THE THUNDERSTORMS IN THE AREA CONTINUED 
TO REMAIN NEARLY STATIONARY. RADAR RAINFALL ESTIMATES HAVE INDICATED 
THAT 3 TO 4 INCHES OF RAIN HAVE FALLEN OVER SOUTHWEST LINCOLN COUNTY 
SINCE 500 PM...JUST SOUTHEAST OF SAGE JUNCTION. AN ADDITIONAL INCH 
OF RAIN IS POSSIBLE THROUGH 915 PM.

RESIDENTS SHOULD MONITOR WEATHER AND STREAM CONDITIONS...AND BE
PREPARED TO MOVE TO HIGHER GROUND QUICKLY SHOULD FLOOD WATERS
THREATEN.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNED AREA EVACUATE TO HIGHER GROUND IMMEDIATELY.
DRY CREEKS AND GENTLY FLOWING STREAMS CAN BECOME RAGING TORRENTS IN A
MATTER OF MINUTES DURING VERY HEAVY RAINFALL. NEVER ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS BY FOOT OR IN A CAR.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY 
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN 
RIVERTON.

LAT...LON 4160 11080 4183 11081 4185 11102 4165 11097
$$

KNUTSVIG

000 
WGUS75 KRIW 170241
FFSRIW
WYC023-170315-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
840 PM MDT SAT AUG 16 2003

...A FLASH FLOOD WARNING CONTINUES FOR SOUTHWESTERN LINCOLN COUNTY
UNTIL 915 PM MDT...

AT 835 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS HAD DISSIPATED ACROSS THE SAGE JUNCTION AREA. RADAR 
RAINFALL ESTIMATES HAVE INDICATED THAT 3 TO 4 INCHES OF RAIN HAVE 
FALLEN OVER SOUTHWEST LINCOLN COUNTY SINCE 500 PM...JUST SOUTHEAST 
OF SAGE JUNCTION. ALTHOUGH THE RAIN HAS DECREASED 
SIGNIFICANTLY...THE THREAT OF RAPIDLY RISING WATER IN STREAMS AND 
CREEKS CONTINUES.

RESIDENTS SHOULD MONITOR WEATHER AND STREAM CONDITIONS...AND BE
PREPARED TO MOVE TO HIGHER GROUND QUICKLY SHOULD FLOOD WATERS 
THREATEN.  NEVER ATTEMPT TO CROSS SWIFTLY FLOWING WATERS BY FOOT OR 
IN A CAR.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY 
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN 
RIVERTON.

LAT...LON 4160 11080 4183 11081 4185 11102 4165 11097
$$

KNUTSVIG

000 
WGUS75 KRIW 170315
FFSRIW
WYC023-170345-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
915 PM MDT SAT AUG 16 2003

...THE FLASH FLOOD WARNING FOR SOUTHWESTERN LINCOLN COUNTY HAS BEEN
ALLOWED TO EXPIRE...

AT 910 PM MDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT 
THE THREAT OF FLASH FLOODING THAT PROMPTED THE WARNING HAS ENDED 
...THUS THE WARNING HAS BEEN ALLOWED TO EXPIRE.



$$
KNUTSVIG

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
235 PM MDT SAT AUG 16 2003

...TONIGHT THROUGH TUESDAY NIGHT...
CONVECTION OCCURRING OVER THE FAR SOUTH AND WEST. INTERESTING FLOW
PATTERN OVER THE AREA WITH SOME ELEMENTS MOVING EAST WHILE OTHER
MOVING NORTH. MODELS CONTINUE THE SAGA OF THE UPPER LOW AND ITS
JOURNEY INTO THE ROCKIES. SATL LOOPS SHOW THE UPPER LOW IS STARTING
TO DIVE SE SO THINK SHORT TERM MODELS ARE OK. CONVECTION WILL LINGER
OVER THE AREA TONIGHT WITH A FRONT MOVING INTO THE NORTH LATE.
SUNDAY AND MONDAY WILL FEATURE THIS UPPER LOW AS IT SETTLES TOWARD
SE IDAHO BY SUNDAY NIGHT AND INTO SW WY/NE UT MONDAY MORNING.
COOLER AIR ALOFT AS SYSTEM MOVES IN AND THIS WILL AID IN AFTERNOON
AND EVENING CONVECTION BOTH DAYS. WILL NOT TRY TO ISOLATE THE BEST
PLACES FOR STORMS AND DEFAULT THE MTNS TO HIGHER POPS. WILL HOPE THE
HIGHER RHS AND COOLER TEMPS WILL AID FIRE FIGHTING EFFORTS THE NEXT
FEW DAYS. WHAT IS LEFT OF THE UPPER SYSTEM EXISTS ACROSS S WY TUESDAY
WITH NW FLOW BEHIND IT. HAVE OPTED TO PUT IN LOW POPS CENT AND E
ZONES AS INSTABILITY WILL STILL BE AROUND MAINLY DUE TO DECENT LAPSE
RATES.

.WEDNESDAY THROUGH SATURDAY...
THE HEAT RETURNS WITH UPPER RIDGE EXPANDING BACK INTO FOUR CORNERS
AREA THROUGH EXTENDED.  DIFFERENCES STILL IN TIMING OF NORTHERN
STREAM SHORTWAVES WED-THU WITH GFS BRUSHING A FRONT THROUGH WEDNESDAY
NIGHT. NOT MUCH IMPACT ON OUR AREA AS H7 TEMPS REBOUND INTO THE 15C
TO 17C RANGE SO BACK TO 90+ READINGS IN BASINS. TRAJECTORY OF UPPER
FLOW IS MORE FROM WSW WHICH SHOULD KEEP US DRY WED-SAT.

.RIW...NONE.

WYZ001>020-022>030-171100-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MDT SAT AUG 16 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS THE FAR WEST THIS
AFTERNOON AND MOVE INTO CENTRAL WYOMING TOWARD EVENING.  THE MAIN
HAZARDS WILL BE FREQUENT CLOUD TO GROUND LIGHTNING AND
THUNDERSTORM-OUTFLOW WIND GUSTS NEAR 50 MILES PER HOUR.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON THROUGH THIS EVENING.