FNUS75 KSLC 261008
FWSSLC

SPOT FORECAST FOR RAILROAD RX
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
408 AM MDT WED MAY 26 2010

.DISCUSSION...A COLD FRONT WILL APPROACH THE UTAH/NEVADA BORDER
TODAY AND WILL STALL THIS AFTERNOON. AHEAD OF THE FRONT WARM AND
BREEZY CONDITIONS ARE EXPECTED TO DEVELOP BY LATE THIS MORNING...
CONTINUING THROUGH THE AFTERNOON HOURS. GOOD VENTILATION IS
EXPECTED IN THIS SCENARIO...WITH RH VALUES FALLING RAPIDLY MIDDAY
AND EARLY AFTERNOON. ISOLATED HIGH BASED SHOWERS AND STORMS ARE
EXPECTED TO DEVELOP ALONG THE FRONT MID TO LATE AFTERNOON. AT
THIS TIME IT IS EXPECTED THAT THIS DEVELOPMENT WILL BE JUST WEST
OF THE BURN SITE. THAT SAID...LIGHT OUTFLOW WINDS FROM THE
WEST/NORTHWEST ARE POSSIBLE BETWEEN 1800-2100. IF THIS OCCURS RH
VALUES WILL LIKELY JUMP RAPIDLY BY 10 TO 15 PERCENT LATE IN THE
DAY. THE COLD FRONT WILL REMAIN NEARLY STATIONARY THROUGH
THURSDAY...WITH INCREASINGLY DRY AND WINDY CONDITIONS DEVELOPING.
SIMILAR OUTFLOW WIND THREATS ARE POSSIBLE THURSDAY AFTERNOON.

.REST OF TONIGHT...
LAL...................1.
HAINES INDEX..........4 ..LOW.
SKY/WEATHER...........PARTLY CLOUDY (45-55 PERCENT CLOUD COVER).
MIN TEMPERATURE.......50.
MAX HUMIDITY..........51-53 PERCENT.
WIND (20 FT)..........SOUTHEAST WINDS 10 MPH.

.WEDNESDAY...
LAL...................1 UNTIL NOON...THEN 2.
HAINES INDEX..........3 ..VERY LOW.
CLEARING INDEX........1000+.
SKY/WEATHER...........CLOUDY (90-100 PERCENT CLOUD COVER). A SLIGHT
                      CHANCE OF SHOWERS AND THUNDERSTORMS AFTER
                      1600.
MAX TEMPERATURE.......70-72.
MIN HUMIDITY..........23-25 PERCENT...JUMPING TO 33-40 PERCENT LATE DAY.
WIND (20 FT)..........SOUTH WINDS 10 MPH INCREASING TO 10-15 MPH WITH
                      GUSTS TO 25 MPH IN THE AFTERNOON. WEST WINDS 10 MPH
                      POSSIBLE VERY LATE IN THE DAY.

.OUTLOOK FOR THURSDAY...
LAL...................1 UNTIL NOON...THEN 2.
HAINES INDEX..........3 ..VERY LOW.
CLEARING INDEX........1000+.
SKY/WEATHER...........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      SLIGHT CHANCE OF SHOWERS. A SLIGHT CHANCE OF
                      THUNDERSTORMS IN THE AFTERNOON.
MAX TEMPERATURE.......71-73.
MIN HUMIDITY..........29-31 PERCENT.
WIND (20 FT)..........SOUTHWEST WINDS 10 MPH INCREASING TO SOUTH 20
                      MPH WITH GUSTS TO 35 MPH IN THE AFTERNOON.



FORECASTER...MERRILL
REQUESTED BY...ERIK HABERSTICK
REASON FOR REQUEST...PRESCRIBED
.TAG 20100526.RAILR.01/SLC

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