Flash Flood Warning 4, NWS Riverton, WY

000 
WGUS75 KRIW 072252
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
451 PM MDT MON AUG 7 2006

WYC019-080030-
JOHNSON WY-
451 PM MDT MON AUG 7 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN JOHNSON
COUNTY UNTIL 630 PM MDT...

AT 450 PM MDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED FLASH   
FLOODING FROM A THUNDERSTORM OVER NORTHEAST JOHNSON COUNTY. THE 
FLASH FLOODING WAS OCCURRING ALONG TIPPERARY ROAD BETWEEN LUDDECK 
ROAD AND DOUBLE CROSS ROAD. DEPUTIES REPORT THAT A PORTION OF 
TIPPERARY ROAD HAS ALREADY BEEN WASHED OUT. DOPPLER RADAR NOW 
ESTIMATES A GROWING AREA OF TWO AND TWO AND ONE-HALF INCHES OF
RAINFALL THAT HAS ALREADY OCCURRED. THIS STORM WAS LOCATED OVER 
NORTHEASTERN JOHNSON COUNTY...OR ABOUT 23 MILES EAST OF 
BUFFALO...MOVING EAST-NORTHEAST AROUND 10 MPH.

ANOTHER THUNDERSTORM NOW CROSSING INTERSTATE 90 SOUTHEAST OF BUFFALO 
WILL TRACK ACROSS THE WARNED AREA BETWEEN 500 AND 530 PM. THE SLOW 
MOVEMENT OF THIS STORM WILL ENABLE ANOTHER ONE-HALF TO ONE INCH OF 
RAIN TO FALL ALONG TIPPERARY ROAD. 

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON 
FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. TURN YOUR CAR 
AROUND DO NOT DROWN.

REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT
1-800-211-1448.

LAT...LON 4448 10648 4432 10637 4441 10603 4455 10603
      4456 10631

$$

JONES

000 
WGUS75 KRIW 072358
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
558 PM MDT MON AUG 7 2006

WYC019-080030-
JOHNSON WY-
558 PM MDT MON AUG 7 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR NORTHEASTERN JOHNSON
COUNTY UNTIL 630 PM MDT...

AT 555 PM MDT...FLASH FLOODING CONTINUES ALONG TIPPERARY ROAD
NORTHEAST OF BUFFALO. THE FLOODING WAS OCCURRING ALONG THIS ROAD
BETWEEN LUDDECK ROAD AND DOUBLE CROSS ROAD. DOPPLER RADAR
ESTIMATES THAT OVER TWO AND ONE-HALF INCHES OF RAIN HAS FALLEN IN
THIS AREA. ADDITIONAL RAINFALL IS EXPECTED TO BE LESS THAN 
ONE-QUARTER INCH AS RAIN SHOWERS PASS TO THE SOUTH OF THE WARNED 
AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS 
SAFELY. TURN AROUND DO NOT DROWN.

REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT
1-800-211-1448.

LAT...LON 4448 10648 4432 10637 4441 10603 4455 10603
      4456 10631

$$

JONES

000 
WGUS75 KRIW 080029
FFSRIW

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
629 PM MDT MON AUG 7 2006

WYC019-080035-
JOHNSON WY-
629 PM MDT MON AUG 7 2006

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MDT FOR NORTHEASTERN
JOHNSON COUNTY...

THE JOHNSON COUNTY SHERIFFS OFFICE REPORTS THAT THE FLOOD WATERS 
ALONG TIPPERARY ROAD NORTHEAST OF BUFFALO HAVE QUICKLY RECEDED. 
COUNTY ROAD AND BRIDGE OFFICIALS ARE ON SCENE TO ASSESS REPAIRS TO 
THE ROAD AND THE ABILITY FOR SAFE TRAVEL. ISOLATED SHOWERS MAY 
STILL OCCUR THROUGH THE EVENING HOURS...BUT RAINFALL WILL BE LESS 
THAN ONE-QUARTER INCH. THEREFORE...WITH THE FLOOD WATERS SUBSIDING 
AND LITTLE ADDITIONAL RAINFALL EXPECTED THE FLASH FLOOD WARNING WILL 
BE ALLOWED TO EXPIRE.

DO NOT DRIVE INTO AREAS WHERE WATER REMAINS OVER THE ROAD SURFACE. 
THE ROAD MAY HAVE BEEN WASHED AWAY. ALMOST HALF OF ALL FLASH FLOOD 
RELATED DEATHS OCCUR IN VEHICLES. TURN AROUND DO NOT DROWN.

REPORT FLOODING TO THE NATIONAL WEATHER SERVICE OFFICE IN RIVERTON AT
1-800-211-1448.

LAT...LON 4448 10648 4432 10637 4441 10603 4455 10603
      4456 10631

$$

JONES

AREA FORECAST DISCUSSION...
NATIONAL WEATHER SERVICE RIVERTON WY
301 PM MDT MON AUG 7 2006

.SHORT TERM...TONIGHT THROUGH THURSDAY
A COUPLE OF SHORTWAVES NE BETWEEN UPPER LOW OVER NORTHERN
CALIFORNIA AND BROAD RIDGE OVER SOUTHERN PLAINS.  FIRST WAVE WAS
NEAR NORTHWEST CORNER OF WYOMING AT 2030Z AND THE SECOND NEAR VERNAL
UTAH.  THUNDERSTORMS HAVE BEEN MAINLY HUGGING THE HIGH TERRAIN THIS
AFTERNOON.  AS HAS BEEN THE CASE THE LAST COUPLE OF NIGHTS THESE
WAVES WILL BE SLOW TO MAKE THE TURN EASTWARD AROUND THE UPPER RIDGE
WITH THE ADDITIONAL FACTOR OF SUB-TROPICAL JET PUNCHING INTO THE
GREAT BASIN KEEPING UPPER LEVEL DIVERGENCE OVER THE SOUTH AND EAST
CENTRAL THROUGH THE NIGHT.  SOME OF THE DRIER AIR OVER THE
NEVADA/UTAH LINE WILL PUSH INTO THE WEST OVERNIGHT.  THUS...
ISOLATED THUNDERSTORMS WILL CONTINUE ACROSS MOST OF THE AREA THIS
EVENING WITH SOME ACTIVITY LINGERING ACROSS MAINLY SWEETWATER AND
NATRONA COUNTIES AFTER MIDNIGHT.  MAIN CHANGE TO FORECAST IS A
SLOWDOWN OF PROGRESSION OF UPPER LOW OVER NORTHERN CALIFORNIA THAT
WILL KEEP MUCH OF WYOMING IN DRY WARM SECTOR TUESDAY.  WITH GOOD
PRESSURE FALLS AHEAD OF THIS UPPER LOW ACROSS CENTRAL MONTANA
TUESDAY...THIS WILL RESULT IN HOT...WINDY AND DRY CONDITIONS ACROSS
MUCH OF SOUTHERN AND CENTRAL WYOMING...A SCENARIO THE MODELS
TYPICALLY UNDERPLAY AS FAR AS WIND...TEMPS AND RH/S.  A FIRE
WEATHER WATCH WILL BE IN EFFECT FOR MUCH OF SOUTHERN AND CENTRAL
WYOMING FROM NOON TUESDAY THROUGH EARLY EVENING.  UPPER TROUGH WILL
MOVE NORTHEAST ACROSS IDAHO TUESDAY NIGHT AND ACROSS MONTANA
WEDNESDAY.  NORTHWEST WYOMING WILL GET BRUSHED WITH THE BEST LIFT
AND MOISTURE FROM THIS SYSTEM TUESDAY AFTERNOON AND NIGHT WHERE
SHOWERS AND THUNDERSTORMS WILL BE MOST PREVALENT.  ANY
THUNDERSTORMS THAT MAKE IT INTO CENTRAL WYOMING WILL BE MAINLY DRY...
PRODUCING STRONG WIND GUSTS.  AIRMASS DRIES OUT AND STABILIZES
BEHIND EXITING TROUGH WEDNESDAY WITH BOTH MODELS PUSHING THE SUB-
TROPICAL MOISTURE PLUME TOWARD THE SOUTHERN BORDER.  TEMPERATURES
WEDNESDAY WILL ONLY BE SLIGHTLY COOLER THAN THE HOT TEMPERATURES
TOMORROW WITH RHS REMAINING LOW...SO FIRE DANGER WILL ONCE AGAIN
BE HIGH DURING WEDNESDAY AFTERNOON AND EARLY EVENING.  ON THURSDAY AN
UPPER LEVEL HIGH PRESSURE RIDGE IS EXPECTED TO EXTEND FROM WEST TEXAS
NORTH ACROSS EASTERN NEW MEXICO...EASTERN COLORADO AND EASTERN
WYOMING CONTINUING NORTH INTO EASTERN MONTANA. AN UPPER LEVEL LOW
PRESSURE TROUGH IS EXPECTED ALONG THE COAST OF WASHINGTON...OREGON
AND NORTHERN COLORADO.  THIS WILL SET UP SOUTHWEST FLOW ALOFT OVER
WYOMING WITH SUBTROPICAL MOISTURE MOVING NORTH OUT OF UTAH AND
WESTERN COLORADO INTO SOUTHERN AND WESTERN WYOMING.  THIS WILL
SUPPORT ISOLATED SHOWERS AND THUNDERSTORMS IN THE SOUTH AND WEST IN
THE AFTERNOON AND EVENING. ENOUGH MOISTURE AND INSTABILITY SHOULD BE
PRESENT FOR ISOLATED SHOWERS IN THE WEST LATE THURSDAY NIGHT AND
EARLY FRIDAY MORNING.

.LONG TERM...FRIDAY THROUGH MONDAY
FRIDAY SHOULD SEE THE MOISTURE INCREASE AS SHORT WAVE LOW PRESSURE
TROUGHS MOVE NORTHEAST IN THE SOUTHWEST FLOW.  THE NORTHERN PART OF
THE UPPER LEVEL HIGH PRESSURE RIDGE IS EXPECTED TO SHIFT SLIGHTLY
EAST INTO WESTERN NEBRASKA AND WESTERN SOUTH DAKOTA.  THIS WILL
ALLOW THE SUBTROPICAL MOISTURE TO SPREAD FARTHER NORTH AND EAST
BRINGING A THREAT OF AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS
TO ALL OF WESTERN AND CENTRAL WYOMING.  A RATHER STRONG SHORT WAVE
TROUGH WILL EJECT FROM THE PACIFIC TROUGH FRIDAY NIGHT.  BEHIND THE
TROUGH ENOUGH DRYING IS EXPECTED TO REMOVE THE THREAT OF CONVECTION
ON SATURDAY.  THE PACIFIC TROUGH IS THEN EXPECTED TO REESTABLISH
ITSELF ON SUNDAY BRINGING ANOTHER FEED OF SUBTROPICAL MOISTURE NORTH
INTO SOUTHERN AND WESTERN WYOMING BRINGING A RETURN TO ISOLATED
SHOWERS AND THUNDERSTORMS SUNDAY AFTERNOON AND EVENING.  MOISTURE
WILL CONTINUE TO MOVE INTO THE AREA ON MONDAY WITH SOUTHWEST FLOW
REMAINING OVER THE AREA.  TEMPERATURES ARE EXPECTED TO REMAIN RATHER
WARM OVER THE AREA WITH SLIGHT COOLING WITH THE TROUGH ON SATURDAY.
OVERALL...THE EXTENDED MODELS ARE IN FAIR AGREEMENT WITH THE SLIGHT
DIFFERENCES THAT DO OCCUR NOT IMPACTING THE OVERALL FORECAST OVER
WESTERN AND CENTRAL WYOMING.

&&

RIW WATCHES/WARNINGS/ADVISORIES...FIRE WEATHER WATCH FOR SOUTH AND
CENTRAL ZONES...FIRE WX ZONES 274...279-283...285...287-289.

&&

SHORT TERM...AEM
LONG TERM...C.BAKER

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE RIVERTON WY
334 PM MDT MON AUG 7 2006

WYZ001>020-022>030-081100-
ABSAROKA MOUNTAINS-BIGHORN MOUNTAINS SOUTHEAST-
BIGHORN MOUNTAINS WEST-CASPER MOUNTAIN-CODY FOOTHILLS-
EAST SWEETWATER COUNTY-FLAMING GORGE-
GREEN MOUNTAINS AND RATTLESNAKE RANGE-JACKSON HOLE-LANDER FOOTHILLS-
NATRONA COUNTY LOWER ELEVATIONS-NORTH BIG HORN BASIN-
NORTHEAST JOHNSON COUNTY-OWL CREEK AND BRIDGER MOUNTAINS-
ROCK SPRINGS AND GREEN RIVER-SALT RIVER AND WYOMING RANGES-
SOUTH LINCOLN COUNTY-SOUTHEAST BIG HORN BASIN-
SOUTHEAST JOHNSON COUNTY-SOUTHWEST BIG HORN BASIN-STAR VALLEY-
TETON AND GROS VENTRE MOUNTAINS-UPPER GREEN RIVER BASIN-
UPPER GREEN RIVER BASIN FOOTHILLS-UPPER WIND RIVER BASIN-
WIND RIVER BASIN-WIND RIVER MOUNTAINS EAST-WIND RIVER MOUNTAINS WEST-
YELLOWSTONE NATIONAL PARK-
334 PM MDT MON AUG 7 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN AND CENTRAL WYOMING.

...FIRE WEATHER WATCH FOR SOUTHERN AND EAST CENTRAL WYOMING FOR
TUESDAY AFTERNOON AND EARLY EVENING...

.DAY ONE...TODAY AND TONIGHT

THE CHANCE FOR THUNDERSTORMS CONTINUES THIS AFTERNOON ACROSS THE
AREA.  THE BEST CHANCE...HOWEVER...WILL BE OVER NATRONA AND JOHNSON
COUNTIES.  THUNDERSTORMS WILL HAVE SOMEWHAT LESS MOISTURE TO WORK
WITH TODAY...SO OUTFLOWS TO 50 MPH ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE THREAT FOR THUNDERSTORMS CONTINUES TUESDAY AS A COOL FRONT MOVES
THROUGH. AHEAD OF THIS FRONT...HOT...DRY AND WINDY CONDITIONS WILL
OCCUR ALONG WITH RELATIVE HUMIDITY DROPPING DOWN TO 10 PERCENT.
THESE WEATHER CONDITIONS HAVE PROMPTED THE ISSUANCE OF A FIRE WEATHER
WATCH FROM 12 NOON TUESDAY THROUGH 9 PM TUESDAY EVENING FOR SOUTHERN
AND EAST CENTRAL WYOMING. OCCASIONAL LIGHTNING AND GUSTY WINDS WILL
BE POSSIBLE WITH THE STORMS DIRECTLY ASSOCIATED WITH FRONT. THE
THUNDERSTORM THREAT WEDNESDAY SHOULD BE CONFINED MAINLY TO SOUTHERN
AND WESTERN WYOMING. ON FRIDAY...THE COMBINATION OF MONSOONAL FLOW
AND AN APPROACHING COLD FRONT MAY PRODUCE STRONG THUNDERSTORMS ACROSS
THE AREA FROM FRIDAY AFTERNOON INTO FRIDAY NIGHT.

SPOTTER INFORMATION STATEMENT...

SPOTTERS ARE ENCOURAGED TO REPORT RAINFALL AMOUNTS...WIND GUSTS OF
40 MPH OR GREATER AND ANY HAIL. THANK YOU.

TEAM RIVERTON