FNUS75 KSLC 171923
FWSSLC

SPOT FORECAST FOR GRACE
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
123 PM MDT WED JUL 17 2013

.DISCUSSION...UPPER LEVEL RIDGE OVER THE EASTERN GREAT BASIN TODAY
WILL SHIFT SLOWLY TO THE WEST OVER THE NEXT SEVERAL DAYS. VERY
MOIST AIRMASS IN PLACE TODAY WILL RESULT IN NUMEROUS THUNDERSTORMS
OVER THE HIGHER TERRAIN OF SOUTHERN UTAH. THERE IS A VERY GOOD
CHANCE THAT OUTFLOW BOUNDARIES FROM NEARBY CONVECTION WILL IMPACT
THE FIRE LOCATION AT TIMES THIS AFTERNOON AND EVENING. THE OUTFLOW WILL
BE CAPABLE OF BRINGING GUSTY AND ERRATIC WINDS TO THE FIRE. OTHERWISE...AWAY
FROM OUTFLOW WINDS WILL LARGELY BE TERRAIN DRIVEN AND LIGHT. WITH
THE MOIST AIRMASS IN PLACE...AFTERNOON MINIMUM RELATIVE HUMIDITY
READINGS WILL BE HIGH WITH GOOD OVERNIGHT RECOVERY EXPECTED.

A MOIST AIRMASS WILL REMAIN IN PLACE TOMORROW INTO THE WEEKEND OVER
THE BURN AREA BRINGING A THREAT FOR AFTERNOON AND EVENING
THUNDERSTORMS EACH DAY. TEMPERATURES WILL SLOWLY CLIMB AND
AFTERNOON HUMIDITY VALUES WILL DROP SLIGHTLY. OVERNIGHT RECOVERY WILL
REMAIN QUITE GOOD AND WINDS WILL LARGELY BE TERRAIN DRIVEN
BENEATH LIGHT FLOW ALOFT.


.REST OF TODAY...
  LAL.................4.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......610.
  SKY/WEATHER.........PARTLY CLOUDY (60-70 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS.
  MAX TEMPERATURE.....76-79.
  MIN HUMIDITY........33-35 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE 3-8 MPH WITH GUSTS TO 13 MPH. GUSTY AND
                      ERRATIC WINDS POSSIBLE NEAR THUNDERSTORMS.

.TONIGHT...
  LAL.................4 UNTIL MIDNIGHT...THEN 2.
  HAINES INDEX........3 ..VERY LOW.
  SKY/WEATHER.........PARTLY CLOUDY (55-65 PERCENT CLOUD COVER). A
                      CHANCE OF SHOWERS AND THUNDERSTORMS UNTIL
                      MIDNIGHT...THEN A SLIGHT CHANCE OF SHOWERS
                      AND THUNDERSTORMS.
  MIN TEMPERATURE.....55-60.
  MAX HUMIDITY........80-85 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE WINDS 3-8 MPH BECOMING DOWNSLOPE AFTER
                      2100 MDT.

.OUTLOOK FOR THURSDAY...
  LAL.................2 UNTIL NOON...THEN 4.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......640.
  SKY/WEATHER.........PARTLY CLOUDY (40-50 PERCENT CLOUD COVER)
                      THEN BECOMING MOSTLY CLOUDY (65-75 PERCENT
                      CLOUD COVER). A SLIGHT CHANCE OF SHOWERS AND
                      THUNDERSTORMS IN THE MORNING...THEN A CHANCE
                      OF SHOWERS AND THUNDERSTORMS IN THE
                      AFTERNOON.
  MAX TEMPERATURE.....77-82.
  MIN HUMIDITY........29-33 PERCENT.
  WINDS - 20-FOOT.....UPSLOPE 3-8 MPH WITH GUSTS TO 13 MPH. GUSTY AND
                      ERRATIC WINDS POSSIBLE NEAR THUNDERSTORMS.

FORECASTER...GRAHAM
REQUESTED BY...PAULA IMLAY
REASON FOR REQUEST...WILDFIRE
.TAG 20130717.GRACE.01/SLC

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