FNUS75 KBYZ 182212
FWSBYZ

SPOT FORECAST FOR CHLORINE LEAK - DERAILED TRAIN...LIVINGSTON 911 DISPATCH
NATIONAL WEATHER SERVICE BILLINGS MT
312 PM MST SUN DEC 18 2011

FORECAST IS BASED ON INCIDENT TIME OF 1454 MST ON DECEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...

SATELLITE IMAGERY AND GROUND OBSERVATIONS INDICATE COLD FRONT
MOVING SOUTHWARD THROUGH THE NORTHERN SECTIONS OF MONTANA THIS
AFTERNOON. CURRENTLY THE COLD FRONT IS ALREADY THROUGH THE JUDITH
GAP AND HARLOWTON AREAS. EXPECTING WINDS TO SHIFT TO THE
NORTHWEST AROUND 5:00 PM LOCAL TIME...AND THEN EASTERLY A FEW
HOURS LATER AFTER THE FRONTAL PASSES THROUGH THE LIVINGSTON AREA.
ALSO...EXPECTING 1 OR 2 INCHES OF SNOW TO ACCUMULATE THROUGH THE
NIGHTTIME HOURS IN THE LIVINGSTON AREA.

.TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY WITH SCATTERED SNOW SHOWERS.
MIN TEMPERATURE.....17-23.
MAX HUMIDITY........82-86 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......NORTHEAST WINDS 5 TO 10 MPH.
 RIDGETOP...........EAST 10 TO 20 MPH.
MIXING HEIGHT.......2800 FT AGL.
MIXING WINDS........WEST 15 TO 25 MPH.

.MONDAY...

SKY/WEATHER.........PARTLY SUNNY IN THE MORNING THEN CLEARING.
MAX TEMPERATURE.....30-35.
MIN HUMIDITY........47-52 PERCENT.
WIND (20 FT)........
 SLOPE/VALLEY.......EASTERLY WINDS 5 TO 10 MPH IN THE MORNING SHIFTING
                    TO THE WEST 5 TO 15 MPH IN THE AFTERNOON.
 RIDGETOP...........WEST 10 TO 20 MPH.
MIXING HEIGHT.......7300 FT AGL.
MIXING WINDS........WEST 5 TO 15 MPH.

$$
FORECASTER...SINGER
REQUESTED BY...911 DISPATCH
TYPE OF REQUEST...HAZMAT
.TAG 20111218.CHLOR.01/BYZ