Text Products for FWS Issued by DMX

Spot Forecast
Issued by NWS Des Moines, IA
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FNUS73 KDMX 251251
FWSDMX

Spot Forecast for Larson Marsh...Story County Conservation
National Weather Service Des Moines IA
751 AM CDT Thu Apr 25 2024

Forecast is based on ignition time of 1100 CDT on April 25.
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...

Aside from a sprinkle possibility or two this morning, dry
conditions are expected to prevail through the daytime hours
before showers and storms lift into the state from the south
tonight. Expect RH values to fall into the 30s percent this
afternoon, with southeast winds around 20 mph and gusts to around
30 mph.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent).
Max temperature.....Around 66.
Min humidity........36 percent.
Wind (20 ft)........Southeast winds 17 to 21 mph.
Mixing height.......4100 ft AGL.
Transport winds.....Southeast 24 to 29 mph.
Smoke dispersal.....Good (44400 knot-ft) early in the morning
                    increasing to excellent (99700 knot-ft) in the
                    afternoon.
GFDI................1.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........62  60  60  60  53  54  58
Weather cov.....
Weather type....
Tstm cov........
Temp............57  60  63  64  65  65  66
RH..............53  49  44  43  40  38  36
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..17  18  18  20  21  20  21
20 FT wind gust.24  25  25  26  28  28  28
Mix hgt (kft)...2.1 2.7 3.5 3.8 4.0 4.1 4.0
Transp wind dir.SE  SE  SE  SE  SE  SE  SE
Transp wind spd.24  25  25  26  26  28  29
GFDI............1   1   1   1   1   1   1
Haines index....4   4   4   4   4   4   4
SDspl kt-ft/100044  60  76  87  93  98  100

.TONIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Slight chance of
                    showers and thunderstorms overnight. Chance of
                    showers and thunderstorms overnight, then
                    showers and thunderstorms early in the morning.
Min temperature.....Around 48.
Max humidity........77 percent.
Wind (20 ft)........Breezy. Southeast winds 17 to 26 mph. Gusts up
                    to 33 mph increasing to 38 mph overnight. Gusty
                    and erratic winds expected near thunderstorms
                    overnight.
Mixing height.......800 ft AGL.
Transport winds.....Southeast 21 to 30 mph.
Smoke dispersal.....Excellent (88900 knot-ft) early in the evening
                    decreasing to fair (14000 knot-ft) late in the
                    night.
GFDI................1.
Haines Index........2 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........63     71     78     85     92     98
Weather cov.....                     S CHC  CHANCE CHANCE
Weather type....NONE   NONE   NONE   RNSHWR RNSHWR RNSHWR
Tstm cov........                     S CHC  CHANCE CHANCE
Temp............64     59     55     53     51     50
RH..............37     44     51     57     63     71
20 ft wind......SE 18  SE 18  SE 20  SE 22  SE 24  SE 26
20 ft wind gust.28     26     31     33     37     38
Mix hgt (ft)....3600   800    800    1000   1100   1300
Transport wind..SE 29  SE 21  SE 21  SE 24  SE 28  SE 28
GFDI............1      1      1      1      1      1
Haines index....4      4      4      4      2      2
SDspl kt-ft/100089     14     15     21     27     31

.FRIDAY...

Sky/weather.........Cloudy (90-100 percent). Showers and
                    thunderstorms.
Max temperature.....Around 64.
Min humidity........81 percent.
Wind (20 ft)........Breezy. Southeast winds 23 to 25 mph with gusts
                    to around 38 mph. Gusty and erratic winds
                    expected near thunderstorms.
Mixing height.......1900 ft AGL.
Transport winds.....Southeast 29 to 36 mph.
Smoke dispersal.....Fair (28200 knot-ft) early in the morning
                    increasing to good (53100 knot-ft) in the
                    afternoon.
GFDI................1.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........98        96        97        95
Weather cov.....DEFNTE    DEFNTE    DEFNTE    DEFNTE
Weather type....RNSHWR    RNSHWR    RNSHWR    RNSHWR
Tstm cov........DEFNTE    DEFNTE    DEFNTE    DEFNTE
Temp............48        49        53        58
RH..............83        89        89        83
20 FT wind......SE 24G38  SE 24G38  SE 25G38  SE 23G37
Mix hgt (ft)....1100      1400      1600      1500
Transport wind..SE 30     SE 33     SE 33     SE 30
GFDI............1         1         1         1
Haines index....2         2         2         2
SDspl kt-ft/100029        40        47        39

$$
Forecaster...Curtis
Requested by...Brandon Clough
Type of request...PRESCRIBED
.TAG 2412423.0/DMX
.DELDT 04/25/24
.FormatterVersion 2.0.0
.EMAIL bclough@storycountyiowa.gov
National Weather Service Weather Forecast Office
