961
FNUS73 KDMX 110733
FWSDMX
SPOT FORECAST FOR CRYSTAL LAKE...IA DNR
NATIONAL WEATHER SERVICE DES MOINES IA
233 AM CDT MON MAY 11 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON MAY 11.
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
WINDS WILL BE LIGHT AND VARIABLE THIS MORNING, BUT GENERALLY FROM
THE NORTHEAST EARLY THEN TURNING QUICKLY TO SOUTH SOUTHEAST BY
NOON. WIND SPEEDS WILL REMAIN BELOW 10 MPH DURING THIS TIME,
HOWEVER, AND MAY BE CALM AT TIMES. WINDS WILL THEN REMAIN SOUTH
SOUTHEAST AND PICK UP A BIT DURING THE AFTERNOON, REACHING SPEEDS
OF NEAR 15 MPH BY LATE IN THE DAY.
TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
TEMPERATURE.........42 AT IGNITION...MAX 70.
RH..................57 PERCENT AT IGNITION...MIN 27 PERCENT.
WIND (20 FT)........WINDS SOUTHEAST AT 3 MPH AT
IGNITION...OTHERWISE LIGHT WINDS BECOMING SOUTH
5 TO 10 MPH IN THE AFTERNOON.
MIXING HEIGHT.......600 FT AGL AT IGNITION...OTHERWISE 5000 FT AGL.
TRANSPORT WINDS.....SOUTH 7 TO 9 MPH SHIFTING TO THE SOUTHWEST 8 TO
12 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR /4500 KNOT-FT/ AT IGNITION. MAX...FAIR
/48700 KNOT-FT/.
TIME (CDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........2 1 7 3 1 2 16 30 33 37
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............42 48 54 57 60 62 65 67 69 70
RH..............57 49 41 38 35 34 31 29 27 28
20 FT WIND DIR..SE SE S S S S S S S S
20 FT WIND SPD..3 3 3 3 5 6 7 7 8 10
20 FT WIND GUST.6 6 7 6 7 8 9 9 12 15
MIX HGT (KFT)...0.6 1.4 3.5 4.0 4.3 4.9 4.9 5.0 5.0 4.9
TRANSP WIND DIR.SE SE S S S S SW SW S S
TRANSP WIND SPD.9 8 8 7 8 8 9 8 10 12
SMOKE DISPERSAL.5 10 24 24 30 34 39 35 45 49
SMOKE CAT.......PR PR PR PR PR PR PR PR FR FR
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (30-40 PERCENT) THEN BECOMING
MOSTLY CLOUDY (50-60 PERCENT) THEN BECOMING
PARTLY CLOUDY (40-50 PERCENT) THEN BECOMING
MOSTLY CLOUDY (70-80 PERCENT). CHANCE OF RAIN
SHOWERS AFTER 3 AM.
TEMPERATURE.........MIN 54.
RH..................MAX 57 PERCENT.
WIND (20 FT)........SOUTH WINDS 13 TO 22 MPH.
MIXING HEIGHT.......600 FT AGL.
TRANSPORT WINDS.....SOUTH 14 TO 23 MPH INCREASING TO 22 TO 25 MPH
OVERNIGHT.
SMOKE DISPERSAL.....FAIR (56600 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (9100 KNOT-FT) LATE IN THE
NIGHT.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........59 28 27 39 43 81
WEATHER COV..... CHANCE
WEATHER TYPE....NONE NONE NONE NONE NONE RNSHWR
TSTM COV........
TEMP............70 66 59 57 54 57
RH..............29 34 45 49 57 55
20 FT WIND......S 13 SE 14 SE 20 S 22 S 21 S 21
20 FT WIND GUST.18 20 28 30 31 31
MIX HGT (FT)....4700 700 700 700 800 900
TRANSPORT WIND..S 14 S 16 S 21 S 24 S 25 S 22
SMOKE DISPERSAL.57 9 12 15 17 16
SMOKE CAT.......FAIR POOR POOR POOR POOR POOR
TUESDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT) THEN BECOMING
SUNNY (5-15 PERCENT). SLIGHT CHANCE OF RAIN
SHOWERS EARLY IN THE MORNING.
TEMPERATURE.........MAX 76.
RH..................MIN 25 PERCENT.
WIND (20 FT)........BREEZY. SOUTHWEST WINDS 20 TO 22 MPH SHIFTING
TO THE NORTHWEST 22 TO 28 MPH IN THE AFTERNOON.
MIXING HEIGHT.......9200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 23 TO 24 MPH SHIFTING TO THE
NORTHWEST AROUND 31 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (18200 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (85800 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (233100
KNOT-FT).
TIME (CDT) 6 AM 9 AM NOON 3 PM
SKY (%).........58 74 17 3
WEATHER COV.....S CHC
WEATHER TYPE....RNSHWR NONE NONE NONE
TSTM COV........
TEMP............58 66 72 75
RH..............55 48 37 28
20 FT WIND......S 22G31 W 20G28 NW 22G29 NW 25G33
MIX HGT (FT)....900 2200 5500 8600
TRANSPORT WIND..SW 24 W 23 NW 26 NW 30
SMOKE DISPERSAL.18 45 126 224
SMOKE CAT.......POOR FAIR VYGD EXNT
FORECASTER...LEE
REQUESTED BY...MEAD
TYPE OF REQUEST...PRESCRIBED
.TAG 2613286.0/DMX
.DELDT 05/11/26
.FORMATTERVERSION 2.0.0
.EMAIL NATE.MEAD@DNR.IOWA.GOV
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