850
FNUS73 KOAX 191012
FWSOAX
SPOT FORECAST FOR RIVERTON JENSEN EAST...IOWA DNR
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
512 AM CDT THU MAR 19 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON MARCH 19.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
UNDER MOSTLY SUNNY SKIES, TEMPERATURES WILL WARM INTO THE UPPER
70S TODAY. RELATIVE HUMIDITY OF AROUND 85 PERCENT AS OF 9 AM WILL
FALL TO AROUND 25 PERCENT IN THE 4 PM TO 5 PM TIMEFRAME. RELATIVE
HUMIDITY THEN RECOVERS TO AROUND 30 PERCENT BY 7 PM AND 45 PERCENT
BY 9 PM. WINDS WILL BE FROM THE NORTH TODAY AT 3 TO 7 MPH THIS
MORNING, INCREASING TO 5 TO 10 MPH THIS AFTERNOON.
STRONGEST POSSIBLE WIND SPEEDS ON DAY OF BURN: SUSTAINED: 10 MPH
GUST: 13 MPH
LOWEST POSSIBLE RELATIVE HUMIDITY ON DAY OF BURN: 23 TO 25 PERCENT
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........26 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS.
SURFACE WINDS (MPH).LIGHT WINDS.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....NORTH 7 TO 8 MPH SHIFTING TO THE NORTHWEST LATE
IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3100 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (28100 KNOT-FT) IN THE
AFTERNOON.
GFDI................2.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........8 6 5 7 5 4 4 11 25
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............47 55 62 67 72 76 77 78 78
RH..............84 66 53 44 37 31 29 27 26
20 FT WIND DIR..N N N N N N NW NW NW
20 FT WIND SPD..3 3 3 3 3 3 3 3 2
20 FT WIND GUST. 6 6 6 6 6 6 6 6
EYE LVL WND DIR.N N N N N N NW NW NW
EYE LVL WND SPD.2 2 2 2 2 2 2 2 1
EYE LVL WND GST. 5 5 5 5 5 5 5 4
SURFACE WND DIR.N N N N N N NW NW NW
SURFACE WND SPD.4 4 4 4 4 4 4 4 3
SURFACE WND GST. 8 8 8 8 8 8 8 7
MIX HGT (KFT)...0.4 0.6 0.8 1.3 1.9 2.8 3.8 4.0 3.7
TRANSP WIND DIR.N N N N N N NW NW W
TRANSP WIND SPD.7 8 8 7 8 8 8 8 7
GFDI............1 1 1 2 2 3 3 3 3
SDSPL KT-FT/10003 4 7 9 13 20 26 28 21
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT).
MIN TEMPERATURE.....AROUND 47.
MAX HUMIDITY........81 PERCENT.
EYE LEVEL WINDS.....LIGHT WINDS BECOMING SOUTHWEST AROUND 4 MPH
LATE IN THE EVENING.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING SOUTHWEST AROUND 6 MPH
LATE IN THE EVENING.
WIND (20 FT)........SOUTH WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING SOUTHWEST AROUND
5 MPH LATE IN THE EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST AROUND 8 MPH SHIFTING TO THE SOUTH 5 TO 14
MPH IN THE EVENING, THEN SHIFTING TO THE
SOUTHWEST 14 TO 16 MPH OVERNIGHT.
SMOKE DISPERSAL.....POOR (800 KNOT-FT).
GFDI................2.
TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........35 43 39 40 36 17 22 18 25 14 15 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............77 74 70 64 62 60 58 55 54 52 52 50
RH..............26 30 38 47 52 56 61 65 68 70 71 75
20 FT WIND DIR..SW SE SE S S S S S SW SW SW SW
20 FT WIND SPD..2 2 3 4 4 5 5 5 5 5 5 5
20 FT WIND GUST.5 5
EYE LVL WND DIR.SW SE SE S S S S S SW SW SW SW
EYE LVL WND SPD.1 1 2 3 3 4 4 4 4 4 4 4
EYE LVL WND GST.4 4
SURFACE WND DIR.SW SE SE S S S S S SW SW SW SW
SURFACE WND SPD.3 3 4 5 5 6 6 6 6 6 6 6
SURFACE WND GST.6 6
MIX HGT (KFT)...3.3 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W S S S S S S S SW SW SW W
TRANSP WIND SPD.8 5 6 9 10 12 14 15 16 14 14 14
GFDI............2 2 2 2 2 2 2 2 2 1 1 1
SDSPL KT-FT/100011 2 1 2 4 5 6 7 7 6 6 5
FRIDAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
MAX TEMPERATURE.....AROUND 81.
MIN HUMIDITY........28 PERCENT.
EYE LEVEL WINDS.....WEST WINDS AROUND 4 MPH SHIFTING TO THE NORTH
IN THE LATE MORNING AND AFTERNOON.
SURFACE WINDS (MPH).LIGHT WINDS BECOMING NORTH 6 TO 8 MPH IN THE
LATE MORNING AND AFTERNOON.
WIND (20 FT)........SOUTHWEST WINDS AROUND 5 MPH SHIFTING TO THE
NORTHWEST 5 TO 7 MPH IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......3700 FT AGL.
TRANSPORT WINDS.....WEST 9 TO 12 MPH SHIFTING TO THE NORTHWEST 16
TO 20 MPH.
SMOKE DISPERSAL.....POOR (3800 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (62900 KNOT-FT) IN THE
AFTERNOON.
GFDI................5.
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........11 5 7 9 11 15 19 23 29 34 40 33
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............49 49 48 53 59 65 71 75 78 80 81 80
RH..............75 81 80 72 62 52 42 37 32 30 28 29
20 FT WIND DIR..W SW SW W NW NW NW NW NW N N N
20 FT WIND SPD..4 5 5 5 5 6 6 6 6 6 6 6
20 FT WIND GUST.5 6 6 7 10 10 11 11 11 11 11 10
EYE LVL WND DIR.W SW SW W NW NW NW NW NW N N N
EYE LVL WND SPD.3 4 4 4 4 4 4 4 4 4 4 4
EYE LVL WND GST.4 5 5 5 7 8 8 8 8 8 8 8
SURFACE WND DIR.W SW SW W NW NW NW NW NW N N N
SURFACE WND SPD.5 6 6 6 6 8 8 8 8 8 8 8
SURFACE WND GST.6 8 8 9 12 13 14 14 14 14 14 13
MIX HGT (KFT)...0.5 0.5 0.5 0.6 0.9 1.2 1.6 2.0 2.8 3.5 3.7 2.8
TRANSP WIND DIR.W W W NW NW NW N N N NW NW N
TRANSP WIND SPD.12 10 9 9 9 12 14 16 18 20 20 16
GFDI............1 1 1 2 2 4 5 6 7 8 8 6
SDSPL KT-FT/10004 4 4 4 7 12 19 29 44 58 63 47
FORECASTER...MEAD
REQUESTED BY...ZAC RIPPERGER
TYPE OF REQUEST...PRESCRIBED
.TAG 2606041.0/OAX
.DELDT 03/19/26
.FORMATTERVERSION 2.0.0
.EMAIL ZAC.RIPPERGER@DNR.IOWA.GOV
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