Spot Forecast
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
688
FNUS73 KDMX 291625
FWSDMX
Spot Forecast for S-190 TEST SPOT RX...US Wildland Fire Service
National Weather Service Des Moines IA
1125 AM CDT Tue Sep 29 2026
Forecast is based on ignition time of 1200 CDT on September 29.
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...
...Test Forecast...
Fire weather concerns are minimal today given a moist airmass
over the state, leading to RH values bottoming out in near 65%
this afternoon. Southerly winds around 10kts gusting as high as
15kts are expected before gusts drop out at sunset. Showers are
ongoing across portions of western Iowa and are expected to reach
the burn site within the next two hours. A few rumbles of thunder
and erratic gusty winds are possible with stronger storms.
.REST OF TODAY...
Sky/weather.........Cloudy (85-95 percent). Showers and slight
chance of thunderstorms.
Max temperature.....Around 72.
Min humidity........73 percent.
Wind (20 ft)........South winds 7 to 9 mph. Gusty and erratic winds
expected near thunderstorms late in the
afternoon.
Mixing height.......1300 ft AGL.
Transport winds.....South 13 to 16 mph.
Smoke dispersal.....Poor (10800 knot-ft).
GFDI................0.
TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........81 91 90 89 87 94
Weather cov..... CHC DEF DEF LKY LKY
Weather type.... RW RW RW RW RW
Tstm cov........ SCH
Temp............68 68 68 68 67 68
RH..............73 76 81 87 90 89
20 FT wind dir..S S S S S S
20 FT wind spd..9 9 8 8 7 7
20 FT wind gust.10 10
Mix hgt (kft)...1.1 1.1 1.3 1.2 1.1 1.0
Transp wind dir.S S S S S S
Transp wind spd.16 14 14 14 15 13
GFDI............0 0 0 0 0 0
Smoke Dispersal.16 14 15 14 14 11
Smoke Cat.......PR PR PR PR PR PR
.TONIGHT...
Sky/weather.........Cloudy (85-95 percent). Showers likely and
slight chance of thunderstorms in the evening,
then showers and chance of thunderstorms
overnight.
Min temperature.....Around 63.
Max humidity........100 percent.
Wind (20 ft)........South winds 5 to 7 mph. Gusty and erratic winds
expected near thunderstorms.
Mixing height.......400 ft AGL.
Transport winds.....South 8 to 13 mph.
Smoke dispersal.....Poor (3300 knot-ft).
GFDI................0.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........92 94 93 96 94 93 92 93 91 90 88 91
Weather cov.....LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY LKY DEF
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH SCH SCH SCH SCH SCH SCH CHC CHC
Temp............68 69 67 67 67 66 66 66 66 66 65 65
RH..............88 87 97 97 97 100 100 100 100 100 100 100
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..7 7 7 7 7 6 5 5 5 5 5 6
20 FT wind gust. 13 12 12 12 9 8 8 7 7 8 9
Mix hgt (kft)...0.8 0.6 0.5 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.S S S S S S SW S SW SW SW SW
Transp wind spd.12 13 12 13 13 12 12 12 10 9 8 9
GFDI............0 0 0 0 0 0 0 0 0 0 0 0
Smoke Dispersal.8 7 5 5 5 5 5 5 4 4 3 4
Smoke Cat.......PR PR PR PR PR PR PR PR PR PR PR PR
.WEDNESDAY...
Sky/weather.........Cloudy (85-95 percent). Chance of thunderstorms
in the morning. Showers through the day. Slight
chance of thunderstorms in the afternoon.
Max temperature.....Around 71.
Min humidity........97 percent.
Wind (20 ft)........South winds 5 to 8 mph. Gusty and erratic winds
expected near thunderstorms early in the
morning. Gusty and erratic winds expected near
thunderstorms late in the afternoon.
Mixing height.......1400 ft AGL.
Transport winds.....South 7 to 12 mph.
Smoke dispersal.....Poor (2700 knot-ft).
GFDI................0.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........92 88 87 84 89 88 90 94 93 90 96 95
Weather cov.....LKY LKY LKY LKY DEF DEF DEF DEF DEF DEF DEF DEF
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........CHC SCH SCH
Temp............65 64 65 66 67 68 68 68 69 69 69 70
RH..............100 100 100 100 100 100 100 100 97 100 100 97
20 FT wind dir..S S S S S S S S S S S S
20 FT wind spd..6 7 7 7 8 7 8 7 7 7 6 5
20 FT wind gust.9 10 12 13 13 13 14 14 14 13 12 9
Mix hgt (kft)...0.4 0.5 0.5 0.7 0.7 0.9 1.2 1.4 1.2 1.0 1.0 0.8
Transp wind dir.S S S SW S SW S S S S S SW
Transp wind spd.7 8 8 9 9 10 10 10 12 12 12 10
GFDI............0 0 0 0 0 0 0 0 0 0 0 0
Smoke Dispersal.3 3 4 5 6 8 11 13 12 10 10 7
Smoke Cat.......PR PR PR PR PR PR PR PR PR PR PR PR
$$
Forecaster...67
Requested by...Ryan Harr
Type of request...PRESCRIBED
.TAG 2622765.0/DMX
.DELDT 09/29/26
.FormatterVersion 2.0.0
.EMAIL ryan_harr@fws.gov