Spot Forecast
Issued by NWS Des Moines, IA
Issued by NWS Des Moines, IA
250
FNUS73 KDMX 121434
FWSDMX
Spot Forecast for Petersburg...Worth County Conservation
National Weather Service Des Moines IA
834 AM CST Wed Nov 12 2025
Forecast is based on ignition time of 0900 CST on November 12.
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...
It will be mild and breezy today, with west northwest winds around
15 MPH and gusts to near 25 MPH at times. Relative humidity will
remain fairly high however, with minimum values between 40 and 50
percent.
.REST OF TODAY...
Sky/weather.........Sunny (20-30 percent).
Temperature.........41 at ignition...Max 54.
RH..................67 percent at ignition...Min 45 percent.
Wind (20 ft)........Winds northwest at 13 mph at
ignition...otherwise West winds 10 to 15 mph.
Mixing height.......800 ft AGL at ignition...otherwise 3100 ft AGL.
Transport winds.....Northwest 20 to 28 mph decreasing to 14 to 17
mph late in the afternoon.
Smoke dispersal.....Fair /14300 knot-ft/ at ignition.
Max...excellent /70600 knot-ft/.
GFDI................3.
TIME (CST) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5 4 3 7 6 7 30 35 46
Weather cov.....
Weather type....
Tstm cov........
Temp............41 45 50 53 53 54 54 52 49
RH..............67 60 54 50 48 47 45 48 54
20 FT wind dir..NW NW NW W W W W W W
20 FT wind spd..13 15 15 15 15 15 15 13 10
20 FT wind gust.22 23 24 24 24 24 23 20 17
Mix hgt (kft)...0.8 1.4 1.6 2.1 2.8 3.1 2.5 0.9 0.6
Transp wind dir.NW NW NW NW NW NW NW NW W
Transp wind spd.20 23 23 24 28 26 24 17 14
GFDI............2 3 3 4 4 4 4 3 2
Smoke Dispersal.14 28 32 44 68 71 52 14 7
Smoke Cat.......PR PR PR FR GD GD FR PR PR
.TONIGHT...
Sky/weather.........Mostly cloudy (60-70 percent) then becoming
partly cloudy (40-50 percent) then becoming
mostly cloudy (55-65 percent).
Temperature.........Min 30.
RH..................Max 92 percent.
Wind (20 ft)........West winds 5 to 7 mph in the evening becoming
light.
Mixing height.......400 ft AGL.
Transport winds.....West 5 to 14 mph shifting to the southwest 6 to
7 mph after 3 am.
Smoke dispersal.....Poor (1600 knot-ft).
GFDI................1.
TIME (CST) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........59 75 78 69 43 58
Weather cov.....
Weather type....NONE NONE NONE NONE NONE NONE
Tstm cov........
Temp............46 39 37 35 34 32
RH..............60 76 82 89 85 89
20 ft wind......W 7 W 6 W 5 W 3 W 2 W 2
20 ft wind gust.14 12 9 8 7 6
Mix hgt (ft)....500 400 400 400 400 400
Transport wind..W 14 W 12 W 10 W 9 W 6 SW 6
GFDI............1 1 0 0 0 0
Smoke Dispersal.6 5 4 3 2 2
Smoke Cat.......POOR POOR POOR POOR POOR POOR
.THURSDAY...
Sky/weather.........Mostly sunny (40-50 percent).
Temperature.........Max 56.
RH..................Min 53 percent.
Wind (20 ft)........Light winds becoming south 5 to 9 mph in the
late morning and afternoon.
Mixing height.......1700 ft AGL.
Transport winds.....South 8 to 15 mph.
Smoke dispersal.....Poor (2200 knot-ft) early in the morning
increasing to fair (21100 knot-ft) in the
afternoon.
GFDI................1.
TIME (CST) 6 AM 9 AM NOON 3 PM
Sky (%).........70 40 41 36
Weather cov.....
Weather type....NONE NONE NONE NONE
Tstm cov........
Temp............31 38 53 56
RH..............100 89 57 53
20 FT wind......S 2G5 S 5G9 S 9G14 S 8G14
Mix hgt (ft)....400 400 1400 1600
Transport wind..S 8 S 13 S 15 S 13
GFDI............0 0 1 1
Smoke Dispersal.3 5 19 18
Smoke Cat.......POOR POOR POOR POOR
$$
Forecaster...Lee
Requested by...Dustin Doty
Type of request...PRESCRIBED
.TAG 2525672.0/DMX
.DELDT 11/12/25
.FormatterVersion 2.0.0
.EMAIL dustin.doty@worthcountyiowa.gov