590
FNUS73 KDMX 011131
FWSDMX
SPOT FORECAST FOR CHICHAQUA PRESCRIBED FIRE - DARNELL...POLK COUNTY CONSERVATION
NATIONAL WEATHER SERVICE DES MOINES IA
631 AM CDT TUE SEP 1 2026
FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON SEPTEMBER 01.
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.
..HEAT ADVISORY IN EFFECT UNTIL 7 PM CDT WEDNESDAY
DISCUSSION
NO FIRE WEATHER CONCERNS ARE ANTICIPATED. VERY LIGHT AND VARIABLE
WINDS THIS MORNING WILL COME AROUND TO ROUGHLY SOUTH BY THIS
AFTERNOON, AT SPEEDS OF AROUND 5-10 MPH. RELATIVE HUMIDITY WILL
FALL AFTER SUNRISE, REACHING A MINIMUM AROUND 50% THIS AFTERNOON.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (20-30 PERCENT).
TEMPERATURE.........88 AT IGNITION...MAX 93.
RH..................61 PERCENT AT IGNITION...MIN 52 PERCENT.
WIND (20 FT)........WINDS SOUTH AT 3 MPH AT IGNITION...OTHERWISE
LIGHT WINDS BECOMING SOUTH AROUND 5 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......1900 FT AGL AT IGNITION...OTHERWISE 4100 FT
AGL.
TRANSPORT WINDS.....SOUTH 8 TO 13 MPH.
SMOKE DISPERSAL.....POOR /13600 KNOT-FT/ AT IGNITION. MAX...FAIR
/44900 KNOT-FT/.
GFDI................0.
TIME (CDT) 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........37 35 35 34 27 16
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............88 89 90 92 92 92
RH..............61 59 56 52 52 52
20 FT WIND DIR..S S S S S S
20 FT WIND SPD..3 5 5 5 5 5
20 FT WIND GUST.7 8 9 10 10 9
MIX HGT (KFT)...1.9 2.5 3.3 3.7 4.1 3.5
TRANSP WIND DIR.S S S S S S
TRANSP WIND SPD.8 10 12 13 13 10
GFDI............0 0 0 0 0 0
SMOKE DISPERSAL.14 23 33 41 45 31
SMOKE CAT.......PR PR PR FR FR PR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
TEMPERATURE.........MIN 75.
RH..................MAX 74 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 7 MPH.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 15 MPH.
SMOKE DISPERSAL.....POOR (3700 KNOT-FT).
GFDI................0.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........8 5 7 16 39 34
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............91 87 80 79 78 77
RH..............56 63 74 69 67 69
20 FT WIND......S 3 SE 5 S 6 S 7 S 7 S 7
20 FT WIND GUST.7 7 9 10 12 12
MIX HGT (FT)....1400 500 500 500 500 500
TRANSPORT WIND..S 8 SE 9 S 13 S 14 SW 15 SW 12
GFDI............0 0 0 0 0 0
SMOKE DISPERSAL.10 4 5 6 6 5
SMOKE CAT.......POOR POOR POOR POOR POOR POOR
WEDNESDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
TEMPERATURE.........MAX 93.
RH..................MIN 50 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 9 MPH.
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....NORTH AROUND 10 MPH SHIFTING TO THE SOUTHWEST
10 TO 16 MPH IN THE MORNING, THEN SHIFTING TO
THE WEST 9 TO 16 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (4000 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (42700 KNOT-FT) IN THE
AFTERNOON.
GFDI................0.
TIME (CDT) 6 AM 9 AM NOON 3 PM
SKY (%).........33 24 26 5
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
TEMP............75 78 87 91
RH..............71 71 57 52
20 FT WIND......S 6G10 SW 7G12 SW 9G15 SW 9G15
MIX HGT (FT)....400 900 3000 2600
TRANSPORT WIND..N 10 SW 13 W 16 W 13
GFDI............0 0 0 0
SMOKE DISPERSAL.4 9 42 29
SMOKE CAT.......POOR POOR FAIR POOR
FORECASTER...LEE
REQUESTED BY...DOUGLAS TODEY
TYPE OF REQUEST...PRESCRIBED
.TAG 2621024.0/DMX
.DELDT 09/01/26
.FORMATTERVERSION 2.0.0
.EMAIL DOUGLAS.TODEY@POLKCOUNTYIOWA.GOV
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