FNUS75 KSLC 241207
FWSSLC

SPOT FORECAST FOR RAILROAD RX
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
607 AM MDT WED APR 24 2013

.DISCUSSION...HIGH PRESSURE WILL BEGIN BUILDING OVER THE AREA LATER
TODAY...LEADING TO WARMER AND MORE STABLE CONDITIONS THROUGH THE
END OF THE WEEK. CLEARING INDICES STILL LOOK GOOD FOR
TODAY...WITH THE BEST CLEARING LIKELY IN THE EARLY AND MID
AFTERNOON. TRANSPORT WINDS ALOFT WILL GENERALLY BE NORTHEASTERLY
AROUND 10 MPH THROUGH THIS PERIOD OF TIME. TRANSPORT WINDS WILL
DECREASE AND BECOME MORE EASTERLY AS THE DAY GOES ON...BUT
VERTICAL MIXING SHOULD STILL BE GOOD FROM 1200 TO 1800 LOCAL
TIME.

CLEARING FOR THURSDAY WILL BE LITTLE MORE MARGINAL...WITH BOTH
TRANSPORT WINDS AND MIXING LOOKING LESS FAVORABLE THAN TODAY.
HOWEVER...IT DOES LOOK LIKE THERE WILL BE A PERIOD OF TIME IN THE
MIDDLE OF THE AFTERNOON WHERE CLEARING SHOULD EXCEED 400. SURFACE
WINDS ARE GENERALLY EXPECTED TO BE LIGHT AND VARIABLE...BUT AS
MENTIONED BELOW THE MOST LIKELY DIRECTION FOR WINDS GREATER THAN
5 MPH IS OUT OF THE WEST.

.TODAY...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......630.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....58-61.
  MIN HUMIDITY........12-14 PERCENT.
  WINDS - 20-FOOT.....NORTHEAST WINDS 5 TO 10 MPH.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....35-38.
  MAX HUMIDITY........38-41 PERCENT.
  WINDS - 20-FOOT.....LIGHT AND VARIABLE.

.OUTLOOK FOR THURSDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......510.
  SKY/WEATHER.........MOSTLY SUNNY (15-25 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....66-69.
  MIN HUMIDITY........10-12 PERCENT.
  WINDS - 20-FOOT.....LIGHT AND VARIABLE. WEST WINDS 4 TO 8 MPH
                      POSSIBLE IN THE AFTERNOON.



FORECASTER...SCHOENING
REQUESTED BY...ERIC LAMALFA
REASON FOR REQUEST...PRESCRIBED
.TAG 20130424.RAILR.02/SLC

$$