Severe Thunderstorm Warning 22, NWS Riverton, WY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE RIVERTON WY
305 AM MDT THU AUG 3 2000

UPPER HIGH STILL SPINNING OVER UTAH WITH DECENT AMOUNT OF CLOUDINESS
ACROSS THE WESTERN THIRD OF THE CWA.  WATER VAPOR IMAGERY NOT
SHOWING ANY DRYING OVER OR NEAR THE AREA...WITH COPIOUS MID TO UPPER
LEVEL MOISTURE TO OUR SOUTH THRU WEST.  NEXT SHOT OF SHORTWAVE
ENERGY TO COME TODAY ACROSS SOUTHERN PART OF THE AREA...WHILE A
WEAKER SHOT GRAZES THE NORTH THIS EVENING AND TONIGHT.  LATER IN THE
DAY FRIDAY ANOTHER GOOD SHORTWAVE PROGGED TO WHISK ACROSS SOUTHERN
MONTANA AND NORTHERN WYOMING.  NOT MUCH CHANGE IN THE LOWER LAYER
MOISTURE SITUATION TODAY...SO WOULD EXPECT MOST STORMS TO PRODUCE
LITTLE TO NO RAIN.  MOISTURE EXPECTED TO DEEPEN A BIT FRIDAY FROM
THE MID-LAYER TOWARD THE SURFACE...WHICH IS REFLECTED IN SLIGHTLY
HIGHER PRECIPITABLE WATER VALUES.  SO A BIT BETTER CHANCE OF AT
LEAST SOME STORMS PRODUCING MORE THAN A FEW HUNDREDTHS OF AN INCH OF
RAIN.  FOCUS SHOULD SHIFT FROM MORE STORMS ACROSS THE SOUTH TODAY TO
MORE ACROSS THE NORTH FRIDAY AS SHORTWAVES TRAVERSE THESE AREAS
CORRESPONDINGLY.  NO REALLY GOOD LOW-LEVEL CONVERGENCE/UPPER-LEVEL
DIVERGENCE COUPLETS SEEN...BUT STILL DECENT LOW-LEVEL CONVERGENCE TO
AID IN STORM FORMATION.  TEMPERATURE CHANGES SLIGHT NEXT FEW
DAYS...MAINLY DUE TO CLOUD AMOUNTS AND THUNDERSTORM OUTFLOW.
APPEARS SOME COLLING COULD BE ON THE HORIZON AS MRF SHOWING UPPER
HIGH TO BE FLATTENED INTO THE SOUTHERN PLAINS FOR SUNDAY THRU THE
MIDDLE OF NEXT WEEK AS SERIES OF TROFS CROSS THE NORTHERN TIER OF
STATES.  NEXT BEST CHANCE FOR ANY SIGNIFICANT COOLING TO COME SUNDAY
AS COLD FRONT EXPECTED SATURDAY EVENING/NIGHT BY FIRST IN
AFOREMENTIONED SERIES OF TROFS. BY LATE NEXT WEEK MRF SHOWS UPPER
HIGH FLEXING ITS MUSCLE BACK OUR WAY.

WITH MORE MAINLY DRY CONVECTION EXPECTED TODAY...FIRE SITUATION TO
ONLY WORSEN AS LIGHTNING PROVIDING MORE STARTS EVERY DAY.  CURRENT
PATTERN AND SHORT-TERM EXTENDED NOT HOLDING OUT MUCH HOPE OF RELIEF
ANYTIME SOON.

.RIW...NONE.

VALONE

WYZ015-031930-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
1237 PM MDT THU AUG 3 2000

...THUNDERSTORMS DEVELOPING OVER WESTERN NATRONA COUNTY...

AT 1235 PM DOPPLER RADAR INDICATED A LINE OF DEVELOPING
THUNDERSTORMS OVER WESTERN NATRONA COUNTY MOVING EASTWARD AT 25 TO
30 MPH. AT THEIR CURRENT SPEED THESE STORMS WILL REACH THE CASPER
AREA BY AROUND 120 PM. AT THIS TIME THE STORMS ARE NOT SEVERE...BUT
WERE INTEN5SIFYING. EXPECT AT LEAST GUSTY WINDS...SHOWERS...LIGHTNING
AS THESE STORMS MOVE THROUGH CASPER.

WATCH FOR FURTHER UPDATES OR SEVERE THUNDERSTORM WARNINGS IF THE
STORMS INTENSIFY OR BECOME SEVERE.

WCJIN-WYNE
RWM

WYZ022-024-032000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
102 PM MDT THU AUG 3 2000

...THUNDERSTORMS MOVING INTO SOUTHWESTERN SWEETWATER COUNTY...
AT 1255 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS MOVING INTO SOUTHWESTERN SWEETWATER COUNTY.  THESE
STORMS ARE MOVING TO THE NORTHEAST AT 30 MPH. PEOPLE AROUND THE
FLAMING GORGE RECREATIONAL AREA SHOULD ANTICIPATE THESE STORMS
ARRIVAL BY 120 PM.  THESE STORMS ARE CAPABLE OF PRODUCING STRONG
GUSTY WINDS...BRIEF HEAVY RAIN...AND CLOUD TO GROUND LIGHTNING.

SEEK SHELTER IF THESE STORMS APPROACH YOUR AREA

WCJIN-WYSW

T BAKER