FNUS75 KSLC 231357
FWSSLC

SPOT FORECAST FOR MERCHANT VALLEY MIXED CON
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
757 AM MDT TUE APR 23 2013

.DISCUSSION...A COLD AND DRY AIRMASS IS CURRENTLY IN PLACE ACROSS
THE REGION. HIGH PRESSURE IS BUILDING AND WILL CONTINUE FOR
MUCH OF THE UPCOMING WEEK. TRANSPORT WINDS SHOULD BE STRONG
ENOUGH FOR GOOD MIXING THIS MORNING AND INTO EARLY AFTERNOON BUT
ARE EXPECTED TO WEAKEN BY MID TO LATE AFTERNOON. LIGHT WINDS
COUPLED WITH ATMOSPHERIC STABILITY WILL LIKELY KEEP CLEARING
INDICES LOW BEGINNING WEDNESDAY DESPITE THE PASSAGE OF A FEW WEAK
STORM SYSTEMS. THE DRY AIRMASS WILL REMAIN IN PLACE...KEEPING RH
VALUES GENERALLY LOW.

.TODAY...
  LAL.................1.
  HAINES INDEX........3 ..VERY LOW.
  CLEARING INDEX......1000+.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER).
  MAX TEMPERATURE.....40-44.
  MIN HUMIDITY........21-25 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 15 TO 25 MPH GUSTING TO 30 MPH
                      DECREASING TO 10-15 MPH BY 2100.

.TONIGHT...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  SKY/WEATHER.........MOSTLY CLEAR (20-30 PERCENT CLOUD COVER).
  MIN TEMPERATURE.....22-26.
  MAX HUMIDITY........69-71 PERCENT.
  WINDS - 20-FOOT.....NORTH WINDS 10 MPH BECOMING NORTHEAST 5 MPH
                      AROUND 2000...THEN SHIFTING TO THE SOUTH AFTER
                      MIDNIGHT.

.OUTLOOK FOR WEDNESDAY...
  LAL.................1.
  HAINES INDEX........4 ..LOW.
  CLEARING INDEX......350.
  SKY/WEATHER.........MOSTLY SUNNY (10-20 PERCENT CLOUD COVER) THEN
                      BECOMING PARTLY CLOUDY (30-40 PERCENT CLOUD
                      COVER).
  MAX TEMPERATURE.....49-53
  MIN HUMIDITY........16-20 PERCENT.
  WINDS - 20-FOOT.....SOUTHWEST WINDS 5 MPH SHIFTING TO THE
                      NORTHEAST AROUND 1000.



FORECASTER...VERZELLA
REQUESTED BY...CORY NORMAN
REASON FOR REQUEST...PRESCRIBED
.TAG 20130423.MERCH.01/SLC

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