FNUS75 KSLC 131757
FWSSLC

SPOT FORECAST FOR BARTHOLOMEW
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
1155 AM MDT FRI MAY 13 2011

.DISCUSSION...THE STRONG HIGH PRESSURE ALOFT ACROSS UTAH TODAY WILL
MOVE EAST INTO WESTERN COLORADO TONIGHT. INCREASING SOUTHERLY FLOW
BEHIND THE EXITING HIGH PRESSURE WILL BRING FURTHER WARMING TO THE
FIRE SITE...WITH INCREASING SOUTHERLY WINDS THROUGH THE WEEKEND.
HUMIDITIES WILL ALSO TREND DOWNWARD WITH THE LOWEST RH VALUES ON
SUNDAY AFTERNOON. A COLD FRONT WILL WEAKEN AS IT SWEEPS THROUGH
THE SITE SUNDAY NIGHT. COOLER TEMPERATURES...HIGHER RH VALUES AND
LIGHTER WINDS ARE EXPECTED EARLY NEXT WEEK BEHIND THE FRONT.

NOTE --- IT WOULD PROBABLY WORK OUT BETTER IF YOU CONVERTED THE
20-FOOT WINDS TO EYE-LEVEL WINDS. ON SITE OBSERVATION SHOULD GIVE
YOU A BETTER IDEA OF VEGETATION DENSITY/DISTRIBUTION...AND WOULD
MAKE CONVERSION FROM 20-FOOT WINDS TO EYE-LEVEL WINDS MORE
ACCURATE.

.TODAY...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......710.
  SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....65-68.
  MIN HUMIDITY........21-23 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 TO 10 MPH...INCREASING TO
                      6 TO 12 MPH AFTER 1400.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....44-46.
  MAX HUMIDITY........63-65 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 6 TO 10 MPH...BECOMING
                      NORTHWEST 5 TO 10 MPH AFTER 2000.

.OUTLOOK FOR SATURDAY...
  LAL.................1 UNTIL 1500...THEN 2.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND ISOLATED THUNDERSTORMS
                      AFTER 1500.
  MAX TEMPERATURE.....64-66.
  MIN HUMIDITY........19-21 PERCENT.
  WINDS - 20-FOOT.....SOUTHEAST WINDS 5 TO 10 MPH...BECOMING SOUTH
                      SOUTHEAST 10 TO 15 MPH AFTER 1100. GUSTS TO
                      18 MPH AFTER 1400.

.OUTLOOK FOR SUNDAY AND MONDAY...SUNDAY WILL BECOME WINDY OUT OF
THE SOUTH WITH VERY WARM TEMPERATURES AND LOW RH VALUES. A COLD
FRONT WILL WEAKEN AS IT MOVES THROUGH THE FIRE SITE SUNDAY NIGHT.
SUBSTANTIALLY COOLER TEMPERATURES ARE EXPECTED WITH MODEST
INCREASES IN RH VALUES. WINDS WILL DROP OFF CONSIDERABLY..THOUGH
THESE WINDS COULD REMAIN BREEZY OUT OF THE WEST SOUTHWEST DURING
THE AFTERNOON.



FORECASTER...CONGER
REQUESTED BY...Lanson Stavast
REASON FOR REQUEST...PRESCRIBED
.TAG 20110515.BARTH.01/SLC

$$