FNUS71 KRNK 192233
FWSRNK

SPOT FORECAST FOR ALLEGHANY TUNNELS...USFS-JAMES RIVER RD
NATIONAL WEATHER SERVICE BLACKSBURG VA
633 PM EDT THU APR 19 2012

FORECAST IS BASED ON REQUEST TIME OF 1810 EDT ON APRIL 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
AS WEAK HIGH PRESSURE WILL PASSES ACROSS THE REGION...WINDS WILL SHIFT
FROM NORTHEASTERLY TO A MORE SOUTHEASTERLY DIRECTION. CLOUD COVER WILL
DIMMINISH SOMEWHAT THROUGH THE EVENING HOURS...BUT INCREASE AGAIN TOWARD
MORNING AS UPSLOPE FLOW REDEVELOPS CLOUDS WITH A LOWER CLOUD BASE.

LOOK FOR A FRONT TO ARRIVE BY SATURDAY WITH INCREASING CHANCES FOR
SHOWERS AND STORMS.

.REST OF TONIGHT...

SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT)...THEN BECOMING
                    PARTLY CLOUDY (35-45 PERCENT). PATCHY FOG LATE.
MIN TEMPERATURE.....AROUND 46.
MAX HUMIDITY........96 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING SOUTHEAST 5
                    TO 6 MPH LATE IN THE EVENING...THEN BECOMING
                    LIGHT AND VARIABLE LATE IN THE EVENING.
CWR (0.01 IN).......0 PERCENT.
MIXING HEIGHT.......2300 FT AGL...DECREASING TO 300 FT AGL IN THE
                    LATE EVENING AND OVERNIGHT.
TRANSPORT WINDS.....SOUTH 0 TO 9 MPH...INCREASING TO AROUND 12 MPH
                    LATE.
EYE LEVEL WINDS.....LIGHT AND VARIABLE WINDS...BECOMING SOUTHEAST 5
                    TO 6 MPH LATE IN THE EVENING...THEN BECOMING
                    LIGHT AND VARIABLE LATE IN THE EVENING.

TIME (EDT)          6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).............68     48     40     28     44     43
WEATHER COV.........                                   PATCHY
WEATHER TYPE........NONE   NONE   NONE   NONE   NONE   FOG
TSTM COV............
TEMP................61     58     56     53     51     50
RH..................64     68     73     79     84     84
20 FT WIND..........SE 2   SE 3   SE 4   SE 3   SE 2   S 2
20 FT WIND GUST.....5      5      10     5      5      5
EYE LEVEL WIND......SE 2   SE 2   SE 3   SE 2   SE 2   S 2
EYE LVL WND GST.....5      5      10     5      5      5
CWR.................0      0      0      0      0      0

.FRIDAY...

SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT). PATCHY FOG EARLY
                    IN THE MORNING. ISOLATED SHOWERS AND
                    THUNDERSTORMS LATE.
MAX TEMPERATURE.....AROUND 71.
MIN HUMIDITY........54 PERCENT.
WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING SOUTH 5 TO
                    8 MPH IN THE LATE MORNING AND AFTERNOON. GUSTY
                    AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS
                    LATE.
CWR (0.01 IN).......20 PERCENT.
MIXING HEIGHT.......1500 FT AGL...INCREASING TO 5400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 12 TO 13 MPH.
EYE LEVEL WINDS.....LIGHT AND VARIABLE WINDS...BECOMING SOUTH 5 TO
                    8 MPH IN THE LATE MORNING AND AFTERNOON.

TIME (EDT)          6 AM   8 AM   10 AM  NOON   2 PM   4 PM
SKY (%).............45     51     48     48     51     55
WEATHER COV.........PATCHY PATCHY
WEATHER TYPE........FOG    FOG    NONE   NONE   NONE   NONE
TSTM COV............
TEMP................48     51     57     63     66     69
RH..................90     85     76     67     59     55
20 FT WIND..........S 2    S 2    S 4    S 5    S 5    S 6
20 FT WIND GUST.....5      5      10     10     10     15
EYE LEVEL WIND......S 1    S 2    S 3    S 4    S 4    S 5
EYE LVL WND GST.....5      5      10     10     10     15
CWR.................10     10     10     10     10     10

$$
FORECASTER...SLEIGHTER
REQUESTED BY...RON SWANN
TYPE OF REQUEST...WILDFIRE
.TAG 20120419.ALLEG.01/RNK