Suppression Forecast
Issued by NWS Des Moines, IA

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000
FNUS73 KDMX 231313
FWSDMX

SPOT FORECAST FOR ETTRICK TRACT...IOWA DNR
NATIONAL WEATHER SERVICE DES MOINES IA
813 AM CDT THU APR 23 2015

FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 23.
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...
HIGH PRESSURE WILL KEEP WINDS LIGHT BECOMING SOUTHERLY WITH
CLEARING SKIES. RH VALUES WILL BE LOW IN THE AFTERNOON BETWEEN 20
TO 30 PERCENT. PRECIPITATION CHANCES WILL INCREASE TONIGHT AFTER
MIDNIGHT AND CONTINUE THROUGH THE DAY FRIDAY.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT). AREAS OF FROST
                    EARLY IN THE MORNING...THEN PATCHY FROST EARLY
                    IN THE MORNING.
MAX TEMPERATURE.....AROUND 58.
MIN HUMIDITY........23 PERCENT.
EYE LEVEL WINDS.....NORTHWEST WINDS AROUND 5 MPH EARLY IN THE
                    MORNING BECOMING LIGHT...THEN BECOMING SOUTH 5
                    TO 7 MPH LATE IN THE AFTERNOON.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1900 FT AGL INCREASING TO 6400 FT AGL.
MIXING WINDS........SOUTHWEST 3 TO 9 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (800-45500 KNOT-FT).
WIND (20 FT)........NORTHWEST WINDS AROUND 5 MPH EARLY IN THE
                    MORNING BECOMING LIGHT...THEN BECOMING SOUTH 5
                    TO 7 MPH LATE IN THE AFTERNOON.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........26  4   1   3   0   0   0   3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............43  46  49  52  55  56  58  58
RH..............36  32  28  25  23  23  23  23
20 FT WIND DIR..N   N   NW  W   W   SW  S   S
20 FT WIND SPD..3   3   3   3   3   5   6   7
20 FT WIND GUST.5   5   5   5   5
EYE LVL WND DIR.N   N   NW  W   W   SW  S   S
EYE LVL WND SPD.2   2   2   2   2   4   4   5
EYE LVL WND GST.5   5   5   5   5
MIX HGT (KFT)...2.7 3.7 4.7 5.7 5.9 6.2 6.4 5.9
MIXNG WIND DIR..NW  NW  NW  NW  W   W   SW  SW
MIXNG WIND SPD..5   6   8   9   8   8   7   8
HAINES INDEX....4   4   3   3   3   3   3   3

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (65-75 PERCENT). SLIGHT CHANCE OF
                    RAIN SHOWERS AFTER MIDNIGHT. CHANCE OF RAIN
                    SHOWERS EARLY IN THE MORNING.
MIN TEMPERATURE.....AROUND 44.
MAX HUMIDITY........73 PERCENT.
EYE LEVEL WINDS.....SOUTHEAST WINDS 7 TO 13 MPH.
HAINES INDEX........4 OR LOW POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......5500 FT AGL DECREASING TO 300 FT AGL.
MIXING WINDS........SOUTHEAST 7 TO 14 MPH.
SMOKE DISPERSAL.....POOR TO GOOD (1500-49700 KNOT-FT).
WIND (20 FT)........SOUTHEAST WINDS 7 TO 13 MPH.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........23     16     27     42     49     69
WEATHER COV.....                            S CHC  CHANCE
WEATHER TYPE....NONE   NONE   NONE   NONE   RNSHWR RNSHWR
TSTM COV........
TEMP............57     54     48     46     46     44
RH..............27     34     47     53     58     65
20 FT WIND......S 7    SE 8   SE 9   SE 12  SE 13  S 13
20 FT WIND GUST.       10     15     15     20     15
EYE LEVEL WIND..S 5    SE 6   SE 6   SE 9   SE 9   S 9
EYE LVL WND GST.       10     15     15     20     15
MIX HGT (FT)....5500   3400   300    300    300    300
MIXNG WIND......S 10   S 10   SE 7   SE 9   SE 10  SE 12
HAINES INDEX....3      3      3      3      3      4

.FRIDAY...

SKY/WEATHER.........CLOUDY (90-100 PERCENT). CHANCE OF RAIN SHOWERS
                    EARLY IN THE MORNING...THEN RAIN SHOWERS
                    LIKELY.
MAX TEMPERATURE.....AROUND 52.
MIN HUMIDITY........63 PERCENT.
EYE LEVEL WINDS.....SOUTHEAST WINDS 13 TO 17 MPH.
HAINES INDEX........3 OR VERY LOW POTENTIAL FOR LARGE PLUME
                    DOMINATED FIRE GROWTH.
MIXING HEIGHT.......1600 FT AGL INCREASING TO 3100 FT AGL IN THE
                    AFTERNOON.
MIXING WINDS........SOUTHEAST 17 TO 24 MPH.
SMOKE DISPERSAL.....POOR TO EXCELLENT (3600-60500 KNOT-FT)
                    INCREASING TO EXCELLENT TO EXCELLENT
                    (62600-64400 KNOT-FT) LATE IN THE AFTERNOON.
WIND (20 FT)........SOUTHEAST WINDS 13 TO 17 MPH.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
SKY (%).........88        93        94        96
WEATHER COV.....CHANCE    LIKELY    LIKELY    LIKELY
WEATHER TYPE....RNSHWR    RNSHWR    RNSHWR    RNSHWR
TSTM COV........
TEMP............44        44        49        51
RH..............65        73        68        68
20 FT WIND......SE 13G20  SE 16G25  SE 17G25  SE 16G25
EYE LEVEL WIND..SE 9G20   SE 11G25  SE 12G25  SE 11G25
MIX HGT (FT)....300       700       2300      3000
MIXNG WIND......S 17      S 23      SE 23     SE 24
HAINES INDEX....3         3         3         3

$$
FORECASTER...AWB
REQUESTED BY...STEVE WOODRUFF
TYPE OF REQUEST...PRESCRIBED
.TAG 20150423.ETTRI.01/DMX



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