617
FNUS73 KOAX 111254
FWSOAX
SPOT FORECAST FOR LHSF LITTLE SIOUX C RX BURN UNIT...IOWA DNR
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
754 AM CDT MON MAY 11 2026
FORECAST IS BASED ON IGNITION TIME OF 1000 CDT ON MAY 11.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
EXPECT A WARM AND DRY DAY WITH PLENTY OF SUNSHINE. TEMPERATURE AT
IGNITION WILL BE AROUND 60 DEGREES AND TOP OUT AT 84 THIS
AFTERNOON WITH RH FALLING FROM THE UPPER 30S TO 24 PERCENT. WIND
WILL BE LIGHT AND SOUTHEASTERLY TO START AND GRADUALLY BECOME
SOUTHERLY, WITH SPEEDS AROUND 8 TO 12 MPH AND GUSTS AROUND 20-22
MPH BY 3-4 PM. GIVEN THE SUNSHINE AND INCREASING WINDS, EXPECT
GOOD MIXING AND SMOKE DISPERSAL. RH SHOULD RECOVER TO AROUND 50
PERCENT OVERNIGHT, THOUGH IT LOOKS EVEN WINDIER, WITH SOUTH TO
SOUTHWEST WINDS GUSTING AROUND 25-30 MPH THROUGH ABOUT SUNRISE.
TUESDAY WILL BE A FEW DEGREES COOLER, WITH SLIGHTLY LOWER RH
AND STRONGER WINDS FOLLOWING A WIND SHIFT FROM SOUTHWESTERLY TO
NORTHWESTERLY BY AROUND 9-10 AM. EXPECT GUSTS OF 30-35 MPH IN THE
AFTERNOON WITH MINIMUM RH OF 21 PERCENT.
STRONGEST POSSIBLE 30 FT WIND SPEEDS ON DAY OF BURN: GUSTS TO 28
MPH
LOWEST POSSIBLE RELATIVE HUMIDITY ON DAY OF BURN: 19 PERCENT
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........24 PERCENT.
EYE LEVEL WINDS.....SOUTH WINDS UP TO 8 MPH. GUSTS UP TO 22 MPH
LATE IN THE AFTERNOON.
WIND (30 FT)........SOUTH WINDS 8 TO 13 MPH. GUSTS UP TO 22 MPH
LATE IN THE AFTERNOON.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 12 MPH. GUSTS UP TO 22 MPH
LATE IN THE AFTERNOON.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WINDS.....SOUTH 12 TO 17 MPH SHIFTING TO THE SOUTHWEST
AROUND 18 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (15300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (111000 KNOT-FT) IN THE
AFTERNOON.
GFDI................0.
TIME (CDT) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........17 7 11 7 25 26 22 27
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............60 64 67 71 77 79 81 84
RH..............39 38 33 30 26 26 25 24
20 FT WIND DIR..SE SE SE SE S S S S
20 FT WIND SPD..6 6 6 7 8 8 9 10
20 FT WIND GUST.10 12 12 14 14 16 17 18
EYE LVL WND DIR.SE SE SE SE S S S S
EYE LVL WND SPD.4 4 4 5 6 6 7 8
EYE LVL WND GST.8 9 9 10 11 12 13 13
30 FT WND DIR...SE SE SE SE S S S S
30 FT WND SPD...8 8 8 9 10 10 11 13
30 FT WND GST...13 15 15 17 18 20 21 22
MIX HGT (KFT)...1.5 2.3 3.0 3.6 4.2 5.6 6.7 7.5
TRANSP WIND DIR.SE SE S S S S SW SW
TRANSP WIND SPD.12 12 12 14 15 17 18 18
GFDI............0 0 0 0 0 0 0 0
SDSPL KT-FT/100016 21 30 44 71 98 111 91
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
MIN TEMPERATURE.....AROUND 61.
MAX HUMIDITY........49 PERCENT.
EYE LEVEL WINDS.....SOUTH WINDS 8 TO 12 MPH WITH GUSTS TO AROUND 19
MPH.
WIND (30 FT)........SOUTH WINDS 13 TO 20 MPH WITH GUSTS TO AROUND
31 MPH.
WIND (20 FT)........SOUTH WINDS 12 TO 17 MPH WITH GUSTS TO AROUND
25 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....SOUTH 15 TO 23 MPH.
SMOKE DISPERSAL.....GOOD (58100 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (8900 KNOT-FT) LATE IN THE
NIGHT.
GFDI................0.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........49 39 26 28 15 48
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............83 79 72 70 68 64
RH..............24 28 35 36 36 41
20 FT WIND......S 11 S 11 S 13 S 16 S 13 S 13
20 FT WIND GUST.18 19 22 25 21 20
EYE LEVEL WIND..S 8 S 8 S 10 S 12 S 10 S 10
EYE LVL WND GST.14 14 17 19 16 15
30 FT WIND......S 14 S 14 S 16 S 20 S 16 S 16
30 FT WND GST...23 24 28 31 26 25
MIX HGT (FT)....7100 500 600 500 600 700
TRANSPORT WIND..SW 18 S 15 S 20 S 23 S 23 S 23
GFDI............0 0 0 0 0 0
SDSPL KT-FT/100058 16 10 10 13 14
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT) THEN BECOMING
SUNNY (0-10 PERCENT). SLIGHT CHANCE OF SHOWERS
LATE IN THE MORNING.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........21 PERCENT.
EYE LEVEL WINDS.....WEST WINDS 7 TO 8 MPH WITH GUSTS TO AROUND 14
MPH SHIFTING TO THE NORTHWEST 10 TO 13 MPH WITH
GUSTS TO AROUND 21 MPH IN THE LATE MORNING AND
AFTERNOON.
WIND (30 FT)........SOUTHWEST WINDS 11 TO 13 MPH WITH GUSTS TO
AROUND 22 MPH SHIFTING TO THE NORTHWEST 20 TO
23 MPH WITH GUSTS TO AROUND 35 MPH IN THE
AFTERNOON.
WIND (20 FT)........SOUTHWEST WINDS 10 TO 12 MPH WITH GUSTS TO
AROUND 18 MPH SHIFTING TO THE NORTHWEST 17 TO
20 MPH WITH GUSTS TO AROUND 28 MPH IN THE
AFTERNOON.
MIXING HEIGHT.......7500 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 16 TO 17 MPH SHIFTING TO THE
NORTHWEST 16 TO 23 MPH LATE IN THE MORNING,
THEN INCREASING TO 28 TO 30 MPH IN THE
AFTERNOON.
SMOKE DISPERSAL.....POOR (8600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (107200 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (140900
KNOT-FT) IN THE AFTERNOON.
GFDI................1.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........64 66 76 52 35 8
WEATHER COV..... S CHC
WEATHER TYPE....NONE NONE RNSHWR NONE NONE NONE
TSTM COV........
TEMP............63 65 72 77 80 80
RH..............45 47 40 32 26 23
20 FT WIND......SW 10 SW 10 NW 13 NW 16 NW 18 NW 18
20 FT WIND GUST.18 19 18 23 26 26
EYE LEVEL WIND..SW 8 SW 8 NW 10 NW 12 NW 13 NW 13
EYE LVL WND GST.13 14 14 17 20 20
30 FT WIND......SW 13 SW 13 NW 16 NW 20 NW 23 NW 23
30 FT WND GST...22 24 23 29 33 33
MIX HGT (FT)....700 900 2000 4500 6200 7300
TRANSPORT WIND..SW 17 SW 16 NW 20 NW 23 NW 28 NW 30
GFDI............0 0 0 1 1 1
SDSPL KT-FT/100010 12 38 107 170 190
FORECASTER...CA
REQUESTED BY...JEFF SEAGO
TYPE OF REQUEST...PRESCRIBED
.TAG 2613318.0/OAX
.DELDT 05/11/26
.FORMATTERVERSION 2.0.0
.EMAIL JEFFREY.SEAGO@DNR.IOWA.GOV
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