Severe Thunderstorm Warning 27, NWS Cheyenne, WY

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
400 AM MDT THU JUNE 10 2004

.SHORT TERM...SOUTHEAST UPSLOPE FLOW EAST OF THE SNOWY RANGE WILL
GIVE WAY TO STRONGER DOWNSLOPE FLOW ONCE THE COLD FRONT MOVES
THROUGH THE SOUTHEAST WYOMING AROUND 18Z. FEW LINGERING WEAK
THUNDERSTORMS IN OUR NORTHERN CWA SHOULD DISSIPATE BY 12Z. AREAS
OF FOG ALREADY FORMING IN LARAMIE COUNTY AND SHOULD SEE THIS EXPAND
ON THE PLAINS AND INTO THE PANHANDLE. SO LOW CEILINGS AND POOR
VISIBILITY...POSSIBLY SOME DRIZZLE...BEFORE THE COLD FRONT MOVES
EAST AND DRIES OUT THE LOWER LEVELS OF THE ATMOSPHERE. GUSTY SURFACE
WINDS EXPECTED TODAY IN WYOMING PORTION OF THE ZONES. IN THE
NEBRASKA PANHANDLE...COULD BE INTERESTING EARLY THIS AFTERNOON WITH
POTENTIAL FOR CONVECTION. STRONG FRONTAL BOUNDARY WILL COLLIDE WITH
MOIST AIR IN THIS AREA AND COULD SEE STRONG THUNDERSTORMS DEVELOP
BETWEEN 18 AND 20Z. SPC DAY 1 OUTLOOK HIGHLIGHTS THIS WITH SLIGHT
RISK OVER THE PANHANDLE AND MODERATE RISK JUST TO THE EAST OF THE
AREA. HIGH TEMPERATURES TODAY WILL BE FAIRLY TRICKY WITH GOOD CAA
BEHIND THE FRONT...AREAS OF FOG THIS MORNING AND DOWNSLOPE SURFACE
WINDS. WENT A FEW DEGREES COOLER THAN PREVIOUS FORECAST AS GUIDANCE
WAS TRENDING COOLER. SURFACE WINDS STAY UP TONIGHT HELPING TO OFFSET
THE POTENTIAL FOR GOOD RADIATIONAL COOLING. FEW EVENING SHOWERS IN
THE MOUNTAINS...OTHERWISE DRY AND PARTLY CLOUDY SKIES.

.LONG TERM...UPPER TROUGH AXIS WILL MOVE E OF THE CWA EARLY FRI AS
UPR LO OVR ERN MT MVS INTO ND.  WRLY FLOW WILL THEN DVLP ALF OVR
THE CWA.  WRLY FLOW CONTS FRI NT WITH A WK S/WV MVG ACRS THE AREA
DRNG THE EVNG.  WINDY CONDITIONS WL OCR AT THE SFC FRI WITH
DOWNSLOPE WEST WINDS.  LOW LEVELS WILL BE DRY BUT SOME MID LEVEL
MOISTURE WL MV OVR THE AREA.  LIS WL BE ABOVE ZERO AND WITH NO
TRIGGER...WILL NO SIGNIFICANT TRIGGER...WILL GO WITH A DRY FORECAST.
WRLY FLOW WL CONT ALF SAT THEN FLOW SHIFTS TO THE NW FOR SUN THRU
WED.  UPPER RIDGE ACRS THE W BUILDS CONSIDERABLY ON TUE AND WED.
WILL MENTION DIURANAL TYPE THUNDERSTORMS ON MOST DAYS IN THE
EXTENDED...DUE TO MID LEVEL MOISTURE AND INSTABILITY GENERATED BY
SURFACE HEATING.  HIGH TEMPERATURES WILL BE ABOUT NORMAL EACH DAY.

.CYS WATCHES/WARNINGS/ADVISORIES...
WY...NONE.
NE...NONE.

JLS/KMD

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
1048 AM MDT THU JUN 10 2004

NEZ001>003-019>021-054-055-111106-
BANNER-BOX BUTTE-CHEYENNE-DAWES-KIMBALL-MORRILL-SCOTTS BLUFF-SIOUX-
INCLUDING THE CITIES OF...ALLIANCE...CHADRON...KIMBALL...
SCOTTSBLUFF AND SIDNEY
1048 AM MDT THU JUN 10 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS THE NEBRASKA
PANHANDLE THIS AFTERNOON AND EARLY THIS EVENING.

SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AND EXTEND INTO
THE EARLY EVENING HOURS.  THE MAIN THREAT WITH THE STORMS WILL BE
LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY
A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS CAN BE EXPECTED FROM
SUNDAY THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED.

WYZ059>070-111106-
CHEYENNE FOOTHILLS-CONVERSE-GOSHEN-LARAMIE RANGE-LARAMIE VALLEY-
NIOBRARA-NORTH CARBON-NORTH LARAMIE RANGE-PINE BLUFFS-PLATTE-
SNOWY RANGE-SOUTHWEST CARBON-
INCLUDING THE CITIES OF...CHEYENNE...DOUGLAS...LARAMIE...LUSK...
RAWLINS...TORRINGTON AND WHEATLAND
1048 AM MDT THU JUN 10 2004

THIS HAZARDOUS OUTLOOK IS FOR SOUTHEASTERN WYOMING.

.DAY ONE...TODAY AND TONIGHT

ISOLATED THUNDERSTORMS WILL OCCUR ACROSS THE AREA TODAY.  SOME SMALL
HAIL AND GUSTY WINDS MAY OCCUR IN THE STRONGER STORMS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

A CHANCE OF AFTERNOON AND EVENING THUNDERSTORMS CAN BE EXPECTED FROM
SUNDAY THROUGH WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT ANTICIPATED.

GRIFFITH