845
FNUS73 KDMX 081153
FWSDMX
SPOT FORECAST FOR YELLOW BANKS - OVERLOOK TRAIL UNIT...POLK COUNTY CONSERVATION
NATIONAL WEATHER SERVICE DES MOINES IA
653 AM CDT WED APR 8 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 CDT ON APRIL 08.
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 WINDY AND WARM TODAY CREATING ELEVATED FIRE WEATHER
CONDITIONS. WINDS FROM THE SOUTH AT 10 TO 20 MPH EARLY THIS
MORNING WILL BECOME FROM THE SOUTHWEST AT 15 TO 25 MPH THIS
AFTERNOON. THE STRONGEST WINDS WILL BE FROM LATE THIS MORNING TO
EARLY THIS AFTERNOON WHEN GUSTS UP TO 40 TO 45 MPH ARE POSSIBLE.
RELATIVE HUMIDITY VALUES WILL FALL TO AROUND 40% WITH MIXING
HEIGHTS INCREASING THROUGH THE DAY PEAKING BETWEEN 5000 AND 6000
FEET AND ALLOWING FOR EXCELLENT SMOKE DISPERSION THIS AFTERNOON.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS OR THUNDERSTORMS.
MAX TEMPERATURE.....AROUND 72.
MIN HUMIDITY........39 PERCENT.
WIND (20 FT)........BREEZY. SOUTH WINDS 15 TO 24 MPH WITH GUSTS TO
AROUND 41 MPH SHIFTING TO THE SOUTHWEST 20 TO
25 MPH WITH GUSTS TO AROUND 44 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WINDS.....SOUTH 22 TO 29 MPH INCREASING TO SOUTHWEST 35
TO 44 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR (16000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (208500 KNOT-FT)
IN THE AFTERNOON.
GFDI................8 INCREASING TO 19 LATE IN THE MORNING.
TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........62 46 30 15 17 20 23 39 55 71 78
WEATHER COV..... SCH CHC CHC CHC
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH SCH
TEMP............46 47 53 57 60 64 67 69 70 71 72
RH..............76 79 69 64 60 52 49 45 44 41 39
20 FT WIND DIR..S S S S S SW SW SW SW SW SW
20 FT WIND SPD..15 18 21 23 24 25 25 24 23 22 20
20 FT WIND GUST.22 26 31 39 41 43 44 44 41 38 33
MIX HGT (KFT)...0.8 1.1 1.8 2.5 3.0 3.7 4.2 4.6 5.3 6.0 4.6
TRANSP WIND DIR.S S S S SW SW SW SW SW SW SW
TRANSP WIND SPD.22 24 29 37 40 43 44 44 44 40 35
GFDI............4 5 8 12 17 19 22 22 21 20 16
SMOKE DISPERSAL.16 23 45 81 104 137 160 174 203 209 137
SMOKE CAT.......PR PR FR GD VGD VGD EXL EXL EXL EXL VGD
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT). SLIGHT CHANCE OF
SHOWERS OR THUNDERSTORMS IN THE EVENING.
MIN TEMPERATURE.....AROUND 41.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 13 TO 17 MPH WITH GUSTS TO
AROUND 28 MPH SHIFTING TO THE NORTHWEST 8 TO 10
MPH EARLY IN THE EVENING. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN
THE EVENING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 18 TO 25 MPH BECOMING NORTHWEST 6 TO
13 MPH EARLY IN THE EVENING.
SMOKE DISPERSAL.....POOR (1800 KNOT-FT).
GFDI................7 DECREASING TO 1 LATE IN THE EVENING.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........85 91 87 68 51 36
WEATHER COV.....CHANCE CHANCE CHANCE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR NONE NONE NONE
TSTM COV........S CHC S CHC
TEMP............70 65 58 53 50 45
RH..............42 48 57 69 71 76
20 FT WIND......SW 17 W 10 NW 8 NW 6 W 5 W 5
20 FT WIND GUST.28 18 14 9 7 7
MIX HGT (FT)....1700 600 500 500 400 400
TRANSPORT WIND..SW 25 W 12 NW 13 N 9 NW 6 NW 7
GFDI............11 4 2 1 1 1
SMOKE DISPERSAL.38 6 6 4 2 2
SMOKE CAT.......POOR POOR POOR POOR POOR POOR
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (45-55 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). RAIN SHOWERS
LIKELY IN THE AFTERNOON. SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON.
MAX TEMPERATURE.....AROUND 60.
MIN HUMIDITY........44 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTH AROUND 5 MPH IN THE
MORNING, THEN SHIFTING TO THE NORTHEAST 5 TO 6
MPH IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
MIXING HEIGHT.......2600 FT AGL.
TRANSPORT WINDS.....NORTH 6 TO 10 MPH SHIFTING TO THE EAST 6 TO 8
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3200 KNOT-FT).
GFDI................2.
TIME (CDT) 6 AM 9 AM NOON 3 PM
SKY (%).........33 39 63 82
WEATHER COV..... LIKELY
WEATHER TYPE....NONE NONE NONE RNSHWR
TSTM COV........
TEMP............43 45 54 59
RH..............76 63 47 45
20 FT WIND......NW 3G7 N 5G7 NE 5G7 E 6G8
MIX HGT (FT)....400 1100 2300 2500
TRANSPORT WIND..N 9 N 10 N 6 E 6
GFDI............1 1 1 2
SMOKE DISPERSAL.3 10 10 11
SMOKE CAT.......POOR POOR POOR POOR
FORECASTER...ANSORGE
REQUESTED BY...DOUGLAS TODEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2609531.0/DMX
.DELDT 04/08/26
.FORMATTERVERSION 2.0.0
.EMAIL DOUGLAS.TODEY@POLKCOUNTYIOWA.GOV
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