FNUS75 KSLC 291558
FWSSLC

SPOT FORECAST FOR CLEAR TRAP RX
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
958 AM MDT MON APR 29 2013

.DISCUSSION...RIDGE AXIS WILL AMPLIFY ALONG THE WEST COAST OVER
THE NEXT COUPLE OF DAYS WHICH WILL SEND A STRONG COLD FRONT ACROSS
THE BURN SITE TUESDAY NIGHT. NORTH NORTHEAST WINDS AT 15-20 MPH
WITH GUSTS TO 30 MPH ARE LIKELY WEDNESDAY...BUT THIS WILL BE A
SHALLOW FRONT SO THE SUBSIDENCE INVERSION WILL BE NEAR 8000 FT
MSL. THIS MAKES THE CLEARING INDEX MARGINAL ABOUT 450-500 DESPITE
GREAT HORIZONTAL DISPERSION. AT THE SAME ANOTHER MODEL GUIDANCE IS
SHOWING THE SUBSIDENCE INVERSION CLOSER TO 10K FT MSL. THIS WOULD
SUPPORT GOOD CLEARING INDEX.
THE SUBSIDENCE INVERSION REMAINS IN PLACE THROUGH THURSDAY WITH
GOOD EAST TO NORTHEAST HORIZONTAL TRANSPORT UNDER THE INVERSION
BUT CLEARING INDEX MAY AGAIN BE MARGINAL IN THE 500 TO 600 RANGE.
UNFORTUNATELY THE DISPARITY BETWEEN MODELS AT THIS TIME IS KEEPING
THE CONFIDENCE LOW FOR CLEARING INDEX FOR THE END OF THE WEEK.

.TODAY...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....77-79.
  MIN HUMIDITY........9-11 PERCENT.
  WINDS - 20-FOOT.....NORTHWEST WINDS 5 MPH INCREASING TO WEST 15
                      MPH IN THE AFTERNOON.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........5 ..MODERATE.
  SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....44-46.
  MAX HUMIDITY........42-44 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 20 MPH DECREASING TO 5 TO 10
                      MPH IN THE LATE EVENING AND OVERNIGHT.

.OUTLOOK FOR TUESDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....75-77.
  MIN HUMIDITY........10-12 PERCENT.
  WINDS - 20-FOOT.....BREEZY. SOUTHWEST WINDS 5 TO 10 MPH
                      INCREASING TO 20 TO 25 MPH IN THE AFTERNOON.



FORECASTER...STRUTHWOLF
REQUESTED BY...TAIGA ROHRER
REASON FOR REQUEST...PRESCRIBED
.TAG 20130429.CLEAR.01/SLC

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