867
FNUS75 KSLC 182310
FWSSLC
SPOT FORECAST FOR ROCKCREEK
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
510 PM MDT TUE JUN 18 2013
...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THURSDAY FOR
GUSTY WINDS...LOW HUMIDITY...DRY FUELS...AND HIGH HAINES
INDEX...
DISCUSSION
BIG PICTURE LOOK AT THE WEATHER IDENTIFIES HIGH
PRESSURE SHIFTING EAST ALLOWING A NET INCREASE OF WARM SOUTHWEST
FLOW ALOFT OVER THE AREA. ADDITIONALLY A COLD FRONT APPROACHING
NORTHERN UTAH IS TIGHTENING A SOUTH-NORTH SURFACE PRESSURE
GRADIENT WITH THIS COMBINATION ALLOWING FOR GUSTY SOUTHERLY WINDS
TO CONTINUE AND ACTUALLY RAMP UP OVER THE NEXT 24-30 HOURS TIME
AS THE FRONT APPROACHES. THIS FRONT WILL MOVE INTO CENTRAL
UTAH TOMORROW AFTERNOON STALLING VERY CLOSE TO THE WILD FIRE
SITE...LIKELY DIMINISHING WIND SPEEDS SOME LATE AFTERNOON AND
WEDNESDAY EVENING. THE FRONT WILL LIFT BACK NORTH OF THE AREA FOR
FRIDAY YIELDING ANOTHER DAY OF BREEZY SOUTH WINDS AND BONE DRY
CONDITIONS...THOUGH UNCERTAIN IF WIND SPEEDS WILL REACH RFW
CRITERIA. REGARDLESS IT WILL BE CLOSE. HUMIDITY WILL REMAIN BONE
DRY WITH SINGLE DIGIT MINIMUMS AND MINIMAL OVERNIGHT RECOVERY
THROUGH THE END OF THE WEEK.
HIGH PRESSURE RETURNS FOR THE WEEKEND ALLOWING LIGHTER WINDS
BUT BONE DRY CONDITIONS WILL CONTINUE.
TONIGHT
LAL.................1.
HAINES INDEX........6 ..HIGH.
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT CLOUD COVER).
MIN TEMPERATURE.....60-62.
MAX HUMIDITY........12-18 PERCENT.
WINDS - 20-FOOT.....BREEZY. SOUTHWEST WINDS 15 TO 25 MPH WITH
GUSTS TO 35 MPH DECREASING TO 10 TO 15 MPH IN
THE LATE EVENING. DOWNSLOPE/DOWNCANYON WINDS
6 TO 12 MPH AFTER 0100.
WEDNESDAY
LAL.................1.
HAINES INDEX........6 ..HIGH.
CLEARING INDEX......1000+.
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
MAX TEMPERATURE.....80-83.
MIN HUMIDITY........6-9 PERCENT.
WINDS - 20-FOOT.....WINDY. SOUTH WINDS 10 TO 15 MPH INCREASING TO
20 TO 30 MPH WITH GUSTS TO AROUND 45 MPH
AFTER 11/1200.
OUTLOOK FOR THURSDAY
LAL.................1.
HAINES INDEX........6 ..HIGH.
CLEARING INDEX......1000+.
SKY/WEATHER.........MOSTLY SUNNY (5-15 PERCENT CLOUD COVER).
MAX TEMPERATURE.....75-77.
MIN HUMIDITY........8-13 PERCENT.
WINDS - 20-FOOT.....DOWNSLOPE/DOWNCANYON 4 TO 8 MPH BECOMING
SOUTH/SOUTHWEST 20 MPH IN THE AFTERNOON.
FORECASTER...MERRILL
REQUESTED BY...DAVE ENGLEMAN
REASON FOR REQUEST...WILDFIRE
.TAG 20130618.ROCKC.01/SLC
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page