FNUS71 KLWX 291018
FWSLWX

SPOT FORECAST FOR ANTIETAM-OTTO FARM 2011...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
618 AM EDT TUE MAR 29 2011

FORECAST IS BASED ON IGNITION TIME OF 0930 EDT ON MARCH 29.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

.DISCUSSION...
VERY DRY AIR AT THE LOW LEVELS WILL LEAD TO RELATIVE HUMIDITY VALUES
AS LOW AS 20 PERCENT ACROSS THE AREA TODAY. 10-HOUR
FUEL MOISTURE VALUES AND MAY DROP TO AROUND 8 PERCENT...RED FLAG CRITERION
TODAY. HOWEVER...WINDS WILL NOT MEET SUSTAINED 20 MPH CRITERION.

HIGH PRESSURE WILL BUILD ACROSS THE AREA THROUGH TODAY.  LOW
PRESSURE WILL MOVE TOWARD THE AREA LATE TONIGHT AND CROSS
TOMORROW...BRINGING RAIN AND POSSIBLY SNOW. ANOTHER LOW PRESSURE
WILL IMPACT THE REGION THURSDAY NIGHT INTO FRIDAY. AN ACTIVE
WEATHER PATTERN MAY CONTINUE INTO THE WEEKEND.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 50.
MIN HUMIDITY........25 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 9 MPH.
CWR.................0 PERCENT.
MIXING HEIGHT.......400-1900 FT AGL...INCREASING TO 5000-5800 FT
                    AGL.
TRANSPORT WINDS.....NORTHWEST 10 TO 16 MPH.

TIME (EDT)          9 AM   11 AM  1 PM   3 PM   5 PM
SKY (%).........21     29     35     38     44
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE
TEMP............32     40     45     48     48
RH..............45     33     27     25     25
20 FT WIND......NW 5   NW 6   NW 6   NW 6   NW 6
20 FT WIND GUST.10     15     15     15     15
CWR.............0      0      0      0      0

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT)...THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT).
MIN TEMPERATURE.....AROUND 29.
MAX HUMIDITY........69 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 7 MPH EARLY IN THE
                    EVENING...BECOMING LIGHT AND VARIABLE.
CWR.................10 PERCENT.
MIXING HEIGHT.......4000 FT AGL...DECREASING TO 0-400 FT AGL.
TRANSPORT WINDS.....NORTHEAST 2 TO 8 MPH.

TIME (EDT)          6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........47     52     60     71     79     84
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............47     42     39     36     34     33
RH..............27     34     40     50     56     58
20 FT WIND......NW 6   NW 4   N 3    N 3    N 2    N 2
20 FT WIND GUST.15     10     5      5      5      5
CWR.............0      0      0      0      0      0

$$
FORECASTER...KONARIK
REQUESTED BY...ED WENSCHHOF
TYPE OF REQUEST...PRESCRIBED
.TAG 20110329.ANTIE.01/LWX