Flash Flood Warning 6, NWS Riverton, WY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
257 AM MDT SAT JUN 14 1997

FCST PRBLM IS CHOOSING THE CORRECT MODEL SOLN FOR SPEED OF EJECTING
THE CUT OFF LOW TO THE EAST AS THIS WILL DETERMINE THE DURATION OF THE
AFT/EVE TSRA ACTIVITY THROUGH THE WEEKEND. KICKER OVER ALASKA ATTM
WHICH IS SOMEWHAT DISTANT AS FAR AS KICKING CUT OFF LOW OVER S NEV TO
THE EAST. HOWEVER WITH LACK OF ANY SIGNIFICANT RIDGE TO THE EAST THE
UPPER LOW SHOULD GET BOOTED OUT TO THE EAST AS EVIDENT BY THE JET MAX
ROUNDING THE TROUGH BY 18Z TODAY. THEREFORE WILL FAVOR THE NGM SOLN OF
THE SHORT WAVE DRAGGING THE CUT OFF LOW TO THE FOUR CORNERS AREA BY
00Z MON. WV/IR LOOP INDICATING VORT MAX STILL SPINNING AROUND OVER S
CENTRAL NEV AND IS RESPONSIBLE FOR THE BROAD AREA OF PRECIP OVER N
UTAH. GOOD STREAMLINE CONV IN THAT AREA AS WELL. THIS AREA OF RAIN
SHOULD THREATEN SW WY THROUGHOUT MOST OF THE MORNING HOURS. WITH THETA
E RIDGE AND AREA OF SFC MSTR CONV OVER SE WY ATTM...E SWEETWATER AND
SE NATRONA COUNTIES SHOULD BE ONE OF THE FIRST AREAS TO SEE CONVECTIVE
ACTIVITY BREAK OUT TODAY. LIFTED INDICES WILL BE AROUND MINUS 4 ONCE
AGAIN THIS AFT. PRECIP WATER AMOUNTS ARE .63 FOR RIW AND QPF GIVES
MUCH OF CWFA ONE QUARTER INCH PRECIP FOR MUCH OF CFWA. LOCALLY HEAVY
RAINS SHOULD ONCE AGAIN BE A THREAT FOR WESTERN/CENTRAL WY. BIG HORN
BASIN WILL HAVE TO BE WATCHED CAREFULLY AS THAT AREA HAS RECEIVED ALOT
OF RAIN YESTERDAY. AS THE CUT OFF LOW GETS SHOVED EAST A SECONDARY SFC
CIRCULATION WILL ESTABLISH ITSELF OVER SE CO AS H7 WINDS SHIFT TO NW
BY LATE TODAY DURING PAC FROPA. WINDS ACTUALLY BECOME NE/UPSLOPE BY
LATE SUN AND WITH SOME 500-800 LYR AVE MSTR STILL AROUND COULD EVEN
SEE SOME STRATIFORM PRECIP BREAK OUT SUN NIGHT AS AIRMASS STABILIZES.
FWC TEMPS LOOK FINE. WOULD BROADBRUSH 70 POPS TODAY. 50 POPS EASTERN
ZONES AND 40 POPS WESTERN ZONES SUN.

LIPSON

WYZ014-018-020-022>025-142110-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
106 PM MDT SAT JUN 14 1997

...THUNDERSTORMS WERE BUILDING OVER SOUTHWEST WYOMING...

AT 105 PM RADAR SHOWED THUNDERSTORMS INCREASING ACROSS SOUTHWEST
WYOMING. THE STRONGEST STORMS WERE BETWEEN ROCK SPRINGS AND RAWLINS AND
WERE MOVING NORTH AROUND 30 MPH. PERSONS TRAVELING ON INTERSTATE 80
BETWEEN ROCK SPRINGS...WAMSUTTER AND RAWLINS SHOULD BE ALERT FOR THESE
STORMS. HEAVY RAIN AND SMALL HAIL ARE LIKELY AND DRIVERS COULD
ENCOUNTER AREAS OF REDUCED VISIBILITIES AND WATER ON THE ROAD.

IF THREATENING WEATHER APPROACHES YOUR AREA...BE PREPARED TO SEEK
SHELTER IMMEDIATELY.

WCJIN-WYSW
BUSH

WYZ014-018-020-022>025-142110-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
106 PM MDT SAT JUN 14 1997

...THUNDERSTORMS WERE BUILDING OVER SOUTHWEST WYOMING...

AT 105 PM RADAR SHOWED THUNDERSTORMS INCREASING ACROSS SOUTHWEST
WYOMING. THE STRONGEST STORMS WERE BETWEEN ROCK SPRINGS AND RAWLINS AND
WERE MOVING NORTH AROUND 30 MPH. PERSONS TRAVELING ON INTERSTATE 80
BETWEEN ROCK SPRINGS...WAMSUTTER AND RAWLINS SHOULD BE ALERT FOR THESE
STORMS. HEAVY RAIN AND SMALL HAIL ARE LIKELY AND DRIVERS COULD
ENCOUNTER AREAS OF REDUCED VISIBILITIES AND WATER ON THE ROAD.

IF THREATENING WEATHER APPROACHES YOUR AREA...BE PREPARED TO SEEK
SHELTER IMMEDIATELY.

WCJIN-WYSW
BUSH