Spot Forecast
Issued by NWS Des Moines, IA

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FNUS73 KDMX 211036
FWSDMX

Spot Forecast for Curt Cable...Dallas County Conservation Boaed
National Weather Service Des Moines IA
536 AM CDT Thu Mar 21 2024

Forecast is based on ignition time of 0600 CDT on March 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...

Although relative humidities will be low at times, fairly seasonal
fire weather conditions can be expected across central Iowa today.
Winds will generally remain easterly with only a slight increase
into the afternoon.

.TODAY...

Sky/weather.........Mostly sunny (35-45 percent) then becoming
                    mostly cloudy (65-75 percent).
Max temperature.....Around 49.
Min humidity........27 percent.
Wind (20 ft)........East winds 7 to 12 mph.
Mixing height.......3400 ft AGL.
Transport winds.....East 10 to 16 mph.
Smoke dispersal.....Poor (4200 knot-ft) early in the morning
                    increasing to good (48100 knot-ft) in the
                    afternoon.
GFDI................5.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........38  28  23  27  34  44  41  42  47  55  61  72
Weather cov.....
Weather type....
Tstm cov........
Temp............29  28  29  31  34  37  40  42  45  46  47  48
RH..............42  50  48  45  39  35  31  29  27  27  27  29
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..7   7   8   10  12  12  10  12  12  12  12  12
20 FT wind gust.15  15  16  17  17  16  14  14  14  14  14  15
Mix hgt (kft)...0.5 0.5 0.7 1.8 2.2 2.6 3.1 3.2 3.4 3.4 3.4 3.4
Transp wind dir.E   E   E   E   E   E   E   E   E   E   E   SE
Transp wind spd.10  10  12  16  16  16  16  14  15  15  15  16
GFDI............3   3   3   4   5   6   5   6   6   7   7   7
Haines index....4   4   4   4   4   4   4   3   3   3   3   3
SDspl kt-ft/10004   4   7   25  31  36  43  39  44  44  44  48

.TONIGHT...

Sky/weather.........Mostly cloudy (65-75 percent). Rain showers
                    likely and chance of thunderstorms overnight.
Min temperature.....Around 35.
Max humidity........62 percent.
Wind (20 ft)........Southeast winds 7 to 12 mph. Gusts up to 23 mph
                    early in the evening. Gusty and erratic winds
                    expected near thunderstorms after 3 am.
Mixing height.......700 ft AGL.
Transport winds.....Southeast 13 to 20 mph.
Smoke dispersal.....Good (50400 knot-ft) early in the evening
                    decreasing to poor (8000 knot-ft) late in the
                    night.
GFDI................5.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........78     76     76     70     64     70
Weather cov.....                                   CHANCE
Weather type....NONE   NONE   NONE   NONE   NONE   RNSHWR
Tstm cov........                                   CHANCE
Temp............47     44     41     41     40     39
RH..............30     38     46     48     52     59
20 ft wind......E 12   E 10   E 9    SE 10  SE 10  SE 8
20 ft wind gust.16     20     22     21     18     14
Mix hgt (ft)....3400   1000   800    900    700    700
Transport wind..SE 17  SE 17  SE 20  SE 18  S 15   S 13
GFDI............7      7      6      6      5      3
Haines index....3      3      3      3      3      3
SDspl kt-ft/100050     14     14     15     9      8

.FRIDAY...

Sky/weather.........Mostly cloudy (75-85 percent). Rain showers
                    likely and chance of thunderstorms in the
                    morning.
Max temperature.....Around 45.
Min humidity........60 percent.
Wind (20 ft)........North winds 8 to 16 mph increasing to 18 to 20
                    mph in the afternoon. Gusty and erratic winds
                    expected near thunderstorms early in the
                    morning.
Mixing height.......3600 ft AGL.
Transport winds.....West around 14 mph shifting to the north 10 to
                    17 mph in the morning, then increasing to 23 to
                    25 mph late in the morning.
Smoke dispersal.....Poor (9900 knot-ft) early in the morning
                    increasing to excellent (79100 knot-ft) in the
                    afternoon.
GFDI................5.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........90        86        76        68
Weather cov.....LIKELY    CHANCE
Weather type....RNSHWR    RNSHWR    NONE      NONE
Tstm cov........CHANCE    CHANCE
Temp............38        37        42        43
RH..............73        92        76        62
20 FT wind......N 8G15    N 9G13    N 16G20   N 20G23
Mix hgt (ft)....1000      1100      2700      3400
Transport wind..W 14      N 13      N 25      N 25
GFDI............2         2         5         8
Haines index....3         3         3         2
SDspl kt-ft/100012        12        59        77

$$
Forecaster...Small
Requested by...Curt Cable
Type of request...PRESCRIBED
.TAG 2408016.0/DMX
.DELDT 03/21/24
.FormatterVersion 2.0.0
.EMAIL curt.cable@dallascountyiowa.gov


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