Suppression Forecast
Issued by NWS Des Moines, IA

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000
FNUS73 KDMX 202222
FWSDMX

SPOT FORECAST FOR PLC EAST...U.S. FISH AND WILDLIFE SERVICE
NATIONAL WEATHER SERVICE DES MOINES IA
522 PM CDT SUN APR 20 2014

FORECAST IS BASED ON IGNITION TIME OF 1100 CDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

AN INITIAL OBSERVATION AT IGNITION AND A MID BURN OBSERVATION ARE REQUIRED...
PLEASE RELAY THEM TO THE NATIONAL WEATHER SERVICE FOR EACH PRESCRIBED BURN.

.DISCUSSION...
FRONTAL BOUNDARY WILL PUSH SE ACROSS CENTRAL IOWA THROUGH THE OVERNIGHT
AND DURING THE DAY MONDAY...REACHING SOUTHERN IOWA LATE. WINDS WILL BE
FROM THE SOUTHWEST AHEAD OF THE BOUNDARY...SHIFTING TO THE NORTH BEHIND.
SHOWERS AND THUNDERSTORMS CAN BE EXPECTED ALONG THE BOUNDARY...THROUGH
MUCH OF THE DAY MONDAY.

.REST OF TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (45-55 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT). ISOLATED SHOWERS
                    AND THUNDERSTORMS AFTER MIDNIGHT. SCATTERED
                    SHOWERS AND THUNDERSTORMS AFTER MIDNIGHT.
MIN TEMPERATURE.....AROUND 59.
MAX HUMIDITY........84 PERCENT.
EYE LEVEL WINDS.....SOUTHWEST WINDS 7 TO 15 MPH.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......6700 FT AGL DECREASING TO 2900 FT AGL IN THE
                    LATE EVENING AND OVERNIGHT.
MIXING WINDS........SOUTHWEST 12 TO 21 MPH DECREASING TO AROUND 10
                    MPH LATE IN THE NIGHT.
SMOKE DISPERSAL.....EXCELLENT TO EXCELLENT (79800-117100 KNOT-FT)
                    DECREASING TO POOR TO GOOD (8900-47500 KNOT-FT)
                    IN THE LATE EVENING AND OVERNIGHT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 15 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS AFTER
                    MIDNIGHT.

TIME (CDT)      5 PM   7 PM   9 PM   11 PM  1 AM   3 AM   5 AM
SKY (%).........45     46     58     65     75     79     82
WEATHER COV.....                            ISOLTD SCTTRD SCTTRD
WEATHER TYPE....NONE   NONE   NONE   NONE   RNSHWR RNSHWR RNSHWR
TSTM COV........                            ISOLTD SCTTRD SCTTRD
TEMP............82     78     71     66     64     62     59
RH..............37     40     51     61     67     72     80
20 FT WIND......S 15   S 14   S 10   S 9    SW 8   SW 7   SW 7
20 FT WIND GUST.20     20     15     10     10
EYE LEVEL WIND..S 11   S 10   S 7    S 6    SW 6   SW 5   SW 5
EYE LVL WND GST.20     20     15     10     10
MIX HGT (FT)....6700   6600   2900   1000   1000   1000   1000
MIXNG WIND......S 21   S 20   S 18   S 17   SW 15  SW 13  SW 10
HAINES INDEX....3      3      3      3      4      3      3

.MONDAY...

SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
                    MOSTLY SUNNY (35-45 PERCENT). SHOWERS AND
                    THUNDERSTORMS LIKELY IN THE MORNING...THEN
                    CHANCE OF SHOWERS AND THUNDERSTORMS IN THE
                    AFTERNOON.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........41 PERCENT.
EYE LEVEL WINDS.....NORTH WINDS 7 TO 15 MPH.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......2300 FT AGL INCREASING TO 6500 FT AGL.
MIXING WINDS........NORTHWEST 9 TO 15 MPH INCREASING TO NORTH 21 TO
                    28 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO FAIR (7700-19600 KNOT-FT) INCREASING TO
                    EXCELLENT TO EXCELLENT (108100-146400 KNOT-FT).
WIND (20 FT)........SOUTHWEST WINDS BECOMING NORTH WINDS 7 TO 15
                    MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR
                    THUNDERSTORMS UNTIL LATE AFTERNOON.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
SKY (%).........85        86        80        53
WEATHER COV.....SCTTRD    LIKELY    CHANCE    S CHC
WEATHER TYPE....RNSHWR    RNSHWR    RNSHWR    RNSHWR
TSTM COV........SCTTRD    LIKELY    CHANCE    S CHC
TEMP............59        60        71        73
RH..............80        84        61        48
20 FT WIND......SW 7      W 7G10    NW 9G15   NW 14G20
EYE LEVEL WIND..SW 5      W 5G10    NW 6G15   NW 10G20
MIX HGT (FT)....1000      1000      3700      6000
MIXNG WIND......SW 9      W 10      NW 9      N 21
HAINES INDEX....4         4         3         3

$$
FORECASTER...BHATTARAI
REQUESTED BY...JIM KRIZMAN FMS
TYPE OF REQUEST...PRESCRIBED
.TAG 20140421.PLCEA.01/DMX



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