Suppression Forecast
Issued by NWS Des Moines, IA

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000
FNUS73 KDMX 111332
FWSDMX

SPOT FORECAST FOR SPRING BROOK STATE PARK...IOWA DNR FIRE
NATIONAL WEATHER SERVICE DES MOINES IA
832 AM CDT FRI APR 11 2014

FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON APRIL 11.
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...

FIRE DANGER WILL BECOME ELEVATED BY THIS AFTERNOON AS WINDS
INCREASE AND RELATIVE HUMIDITY VALUES DROP TO BETWEEN 20 AND
30 PERCENT. SKIES WILL BE SUNNY BY AFTERNOON WITH GOOD MIXING.
WINDS WILL BEGIN TO SUBSIDE THIS EVENING WITH INCREASING CLOUDS.

.TODAY...

SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
TEMPERATURE.........57 AT IGNITION...MAX 74.
RH..................34 PERCENT AT IGNITION...MIN 22 PERCENT.
EYE LEVEL WINDS.....WEST WINDS 6 TO 15 MPH.
HAINES INDEX........6 OR HIGH POTENTIAL FOR LARGE PLUME DOMINATED
                    FIRE GROWTH.
MIXING HEIGHT.......1400 FT AGL INCREASING TO 3900 FT AGL LATE IN
                    THE MORNING...THEN INCREASING TO 6400 FT AGL
                    EARLY IN THE AFTERNOON INCREASING TO 10300 FT
                    AGL IN THE AFTERNOON DECREASING TO 7000 FT AGL.
MIXING WINDS........SOUTHWEST 6 TO 12 MPH INCREASING TO WEST 18 TO
                    26 MPH IN THE LATE MORNING AND EARLY
                    AFTERNOON...THEN DECREASING TO 14 TO 15 MPH
                    LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR TO POOR (1200-6700 KNOT-FT) INCREASING TO
                    FAIR TO EXCELLENT (15900-90600 KNOT-FT) LATE IN
                    THE MORNING...THEN INCREASING TO EXCELLENT TO
                    EXCELLENT (147300-207300 KNOT-FT) EARLY IN THE
                    AFTERNOON DECREASING TO EXCELLENT TO EXCELLENT
                    (86600-159200 KNOT-FT) LATE IN THE AFTERNOON.
WIND (20 FT)........WINDS SOUTHWEST AT 14 MPH AT
                    IGNITION...OTHERWISE WEST WINDS 6 TO 15 MPH.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........42  37  26  21  21  21  21  22
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............57  63  68  70  72  73  74  74
RH..............34  31  28  26  25  23  22  22
20 FT WIND DIR..SW  SW  SW  W   W   W   W   W
20 FT WIND SPD..14  15  15  15  15  15  14  12
20 FT WIND GUST.20  20  25  25  25  25  20  20
EYE LVL WND DIR.SW  SW  SW  W   W   W   W   W
EYE LVL WND SPD.10  11  11  11  11  11  10  9
EYE LVL WND GST.20  20  25  25  25  25  20  20
MIX HGT (KFT)...1.4 3.9 6.4 8.9 9.4 9.9 10  7.0
MIXNG WIND DIR..SW  SW  W   W   W   W   W   W
MIXNG WIND SPD..23  25  26  25  22  18  15  14
HAINES INDEX....6   6   5   5   5   5   5   5

.TONIGHT...

SKY/WEATHER.........PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
                    MOSTLY CLOUDY (50-60 PERCENT).
TEMPERATURE.........MIN 49.
RH..................MAX 77 PERCENT.
EYE LEVEL WINDS.....SOUTH WINDS 8 TO 13 MPH.
WIND (20 FT)........SOUTH WINDS 8 TO 13 MPH.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........22     26     33     42     48     57
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TSTM COV........
TEMP............73     63     55     52     52     51
RH..............24     35     51     58     60     70
20 FT WIND......SW 9   SW 9   S 12   S 13   S 13   S 13
20 FT WIND GUST.15     10     15     15     15     15
EYE LEVEL WIND..SW 6   SW 6   S 9    S 9    S 9    S 9
EYE LVL WND GST.15     10     15     15     15     15

.SATURDAY...

EYE LEVEL WINDS.....SOUTHWEST WINDS 12 TO 20 MPH.
WIND (20 FT)........SOUTHWEST WINDS 12 TO 20 MPH. GUSTY AND ERRATIC
                    WINDS EXPECTED NEAR THUNDERSTORMS.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
20 FT WIND......S 13G15   S 16G25   SW 20G30  SW 15G20
EYE LEVEL WIND..S 9G15    S 11G25   SW 14G30  SW 11G20

$$
FORECASTER...LEE
REQUESTED BY...KARL HARRIS
TYPE OF REQUEST...PRESCRIBED
.TAG 20140411.SPRIN.01/DMX



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