FNUS75 KBYZ 270802
FWSBYZ

SPOT FORECAST FOR SGC NG GAS LEAK...SWEET GRASS CO DES
NATIONAL WEATHER SERVICE BILLINGS MT
202 AM MDT SAT OCT 27 2012

FORECAST IS BASED ON INCIDENT TIME OF 0131 MDT ON OCTOBER 27.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
A SURFACE LOW PRESSURE SYSTEM WILL REMAIN OVER SWEET GRASS COUNTY
THIS MORNING. THIS WILL KEEP LIGHT WEST WINDS OVER THE TOWN OF
GREYCLIFF. THE SURFACE LOW AND A ASSOCIATED SURFACE TROUGH WILL
SHIFT EASTWARD THROUGH THE MORNING WHICH WILL ALLOW WEST WINDS TO
INCREASE TO 5 TO 15 MPH BY LATE MORNING. LIGHT SNOW WILL ALSO
DEVELOP OVER THE SPILL SITE EARLY THIS MORNING. SNOW ACCUMULATIONS
WILL BE LIGHT WITH LESS THAN AN INCH EXPECTED. TEMPERATURES WILL
WARM BY EARLY AFTERNOON AND A MIX OF RAIN OR SNOW SHOWERS CAN BE
EXPECTED.

.TODAY...

SKY/WEATHER.........MOSTLY CLOUDY. SNOW LIKELY IN THE
                    MORNING...THEN SCATTERED LIGHT RAIN SHOWERS AND
                    VERY LIGHT SNOW SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....40-45.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 5 TO 8 MPH THIS MORNING...INCREASING
                    TO 5 TO 15 MPH BY NOON.
 RIDGETOP...........WEST 15 TO 25 MPH.
MIXING HEIGHT.......2200 FT AGL.
MIXING WINDS........WEST 5 TO 15 MPH.

.TONIGHT...

MIN TEMPERATURE.....27-32.
WIND (20 FT)........
 SLOPE/VALLEY.......SOUTHWEST WINDS 5 TO 10 MPH.
 RIDGETOP...........WEST 20 TO 35 MPH.
MIXING HEIGHT.......300 FT AGL.
MIXING WINDS........LIGHT WINDS.

.SUNDAY...

SKY/WEATHER.........MOSTLY CLOUDY WITH ISOLATED RAIN SHOWERS.
MAX TEMPERATURE.....53-58.
WIND (20 FT)........
 SLOPE/VALLEY.......WEST WINDS 10 TO 20 MPH.
 RIDGETOP...........WEST 35 TO 50 MPH.
MIXING HEIGHT.......2600 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

$$
FORECASTER...RICHMOND
REQUESTED BY...KEVIN LNGHUS
TYPE OF REQUEST...HAZMAT
.TAG 20121027.SGCNG.01/BYZ