FNUS73 KDMX 272103
FWSDMX

SPOT FORECAST FOR THORN VALLEY...USFWS
NATIONAL WEATHER SERVICE DES MOINES IA
403 PM CDT WED APR 27 2011

FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

PLEASE REMEMBER TO SUBMIT A MID BURN OBSERVATION TO THE NATIONAL WEATHER
SERVICE FOR EACH PRESCRIBED BURN.

.DISCUSSION...
A NORTHWEST FLOW WILL CONTINUE ACROSS THE AREA TONIGHT THROUGH THURSDAY.
THERE WILL BE A CHANCE FOR ISOLATED LIGHT SHOWERS BY THE AFTERNOON ON
THURSDAY.  RAINFALL FROM THESE WILL BE LIGHT...FROM A TRACE TO NO MORE
THAN ONE OR TWO HUNDREDTHS.

.THURSDAY...

SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT). ISOLATED RAIN
                    SHOWERS IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........42 PERCENT.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1900 FT AGL INCREASING TO 5200 FT AGL EARLY IN
                    THE MORNING...THEN INCREASING TO 8000 FT AGL IN
                    THE LATE MORNING AND EARLY AFTERNOON INCREASING
                    TO 8100 FT AGL LATE IN THE AFTERNOON DECREASING
                    TO 5500 FT AGL.
MIXING WINDS........NORTHWEST 16 TO 21 MPH INCREASING TO 23 TO 31
                    MPH EARLY IN THE MORNING.
SMOKE DISPERSAL.....GOOD (81300 KNOT-FT) INCREASING TO EXCELLENT
                    (191300 KNOT-FT) LATE IN THE MORNING...THEN
                    INCREASING TO EXCELLENT (216900 KNOT-FT) EARLY
                    IN THE AFTERNOON DECREASING TO EXCELLENT
                    (209600 KNOT-FT) LATE IN THE AFTERNOON.
WIND (20 FT)........NORTHWEST WINDS 13 TO 22 MPH.

TIME (CDT)      7 AM      10 AM     1 PM      4 PM
SKY (%).........80        65        41        50
WEATHER COV.....                    ISOLTD    ISOLTD
WEATHER TYPE....NONE      NONE      RNSHWR    RNSHWR
TEMP............41        51        58        61
RH..............82        59        47        42
20 FT WIND......W 13G15   NW 20G30  NW 22G30  NW 20G30
MIX HGT (FT)....300       5200      7800      8100
MIXNG WIND......NW 16     NW 30     NW 31     NW 30
HAINES INDEX....3         3         4         4

$$
FORECASTER...SCHUMACHER
REQUESTED BY...JAMES KRIZMAN
TYPE OF REQUEST...PRESCRIBED
.TAG 20110427.THORN.02/DMX