742
FNUS73 KDVN 211320
FWSDVN
SPOT FORECAST FOR CORALVILLE LAKE...USACE
NATIONAL WEATHER SERVICE QUAD CITIES IA/IL
820 AM CDT TUE APR 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 CDT ON APRIL 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE
NATIONAL WEATHER SERVICE QUAD CITIES AT (563) 386-3815.
DISCUSSION
WARM AND BREEZY CONDITIONS WILL BE SEEN TODAY, WITH TEMPERATURES
RISING INTO THE 70S AREA-WIDE AND AN OCCASIONAL WIND GUST OVER 25
MPH. A WEAK COLD FRONT WILL SWEEP THROUGH THE AREA LATE THIS
AFTERNOON WITH WINDS DECREASING AND BECOMING LIGHT NORTHWEST.
MINIMUM RH VALUES TODAY SHOULD RANGE BETWEEN 35 TO 45%.
THE GRASSLAND FIRE DANGER INDEX -GFDI- DOES NOT ACCOUNT FOR
PRECIPITATION THAT OCCURS OR ANY SNOW ON THE GROUND. PLEASE
MAKE APPROPRIATE ADJUSTMENTS.
REST OF TODAY
SKY/WEATHER.........SUNNY (20-30 PERCENT).
CHANCE OF PCPN......10 PERCENT.
BEGIN/END OF PCPN...
MAX TEMPERATURE.....AROUND 80.
MIN HUMIDITY........38 PERCENT.
MAX APPARENT TEMP...79.
EYE LEVEL WINDS.....WEST WINDS 5 TO 8 MPH. GUSTS UP TO 26 MPH IN
THE LATE MORNING AND EARLY AFTERNOON.
WIND SHIFT..........DECREASE AND NORTHWEST AFTER 4 PM.
WIND (20 FT)........WEST WINDS 9 TO 14 MPH. GUSTS UP TO 26 MPH IN
THE LATE MORNING AND EARLY AFTERNOON.
MIXING HEIGHT.......5300 FT AGL.
TRANSPORT WINDS.....WEST 15 TO 24 MPH.
SMOKE DISPERSAL.....FAIR (22700 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (77300 KNOT-FT) IN THE
AFTERNOON.
GFDI................4.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........29 31 29 28 26 26 29 23 19
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 10 10 0 0 0 0
TEMP............60 64 68 71 74 76 77 79 79
RH..............64 60 57 53 50 45 43 41 39
APARNT TMP (F)..60 64 68 71 74 76 77 79 79
20 FT WIND DIR..SW SW W W W W W W W
20 FT WIND SPD..13 14 14 14 13 12 12 10 9
20 FT WIND GUST.26 25 22 20 20 18 18 16 15
EYE LVL WND DIR.SW SW W W W W W W W
EYE LVL WND SPD.8 8 8 8 8 7 7 6 5
EYE LVL WND GST.16 15 13 12 12 11 11 10 9
MIX HGT (KFT)...1.3 2.1 2.9 3.2 3.9 4.4 4.8 5.3 5.2
TRANSP WIND DIR.SW W W W W W W W W
TRANSP WIND SPD.21 24 23 20 20 18 18 16 15
GFDI............4 4 4 4 4 4 4 4 4
SDSPL KT-FT/100023 45 58 55 67 70 77 74 68
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CHANCE OF PCPN......10 PERCENT.
BEGIN/END OF PCPN...
MIN TEMPERATURE.....AROUND 54.
MAX HUMIDITY........87 PERCENT.
MAX APPARENT TEMP...80.
EYE LEVEL WINDS.....WEST WINDS UP TO 4 MPH SHIFTING TO THE SOUTH
AROUND 3 MPH IN THE LATE EVENING AND OVERNIGHT,
THEN SHIFTING TO THE SOUTHWEST OVERNIGHT
SHIFTING TO THE SOUTH AFTER 3 AM BECOMING LIGHT
BECOMING SOUTH AROUND 3 MPH EARLY IN THE
MORNING.
WIND SHIFT..........
WIND (20 FT)........WEST WINDS 5 TO 7 MPH SHIFTING TO THE SOUTH
AROUND 5 MPH IN THE LATE EVENING AND OVERNIGHT,
THEN SHIFTING TO THE SOUTHWEST OVERNIGHT
SHIFTING TO THE SOUTH AFTER 3 AM BECOMING LIGHT
BECOMING SOUTH AROUND 5 MPH EARLY IN THE
MORNING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....NORTHWEST 6 TO 12 MPH SHIFTING TO THE NORTHEAST
5 TO 7 MPH LATE IN THE EVENING, THEN SHIFTING
TO THE EAST AROUND 5 MPH LATE IN THE EVENING
SHIFTING TO THE SOUTHWEST 6 TO 8 MPH OVERNIGHT.
SMOKE DISPERSAL.....FAIR (24500 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (1600 KNOT-FT) LATE IN THE
NIGHT.
GFDI................2.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........15 14 13 11 15 22
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
TEMP............80 73 65 62 59 56
RH..............38 48 65 70 78 83
APARNT TMP (F)..80 73 65 62 59 56
20 FT WIND......W 7 SW 5 SE 5 S 5 SW 5 S 3
20 FT WIND GUST.12 6 6 8 8 8
EYE LEVEL WIND..W 4 SW 3 SE 3 S 3 SW 3 S 2
EYE LVL WND GST.7 4 4 5 5 5
MIX HGT (FT)....2400 500 400 400 400 400
TRANSPORT WIND..W 12 NW 7 NE 5 S 6 SW 7 SW 7
GFDI............3 1 1 1 1 1
SDSPL KT-FT/100025 3 2 2 3 2
WEDNESDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CHANCE OF PCPN......0 PERCENT.
BEGIN/END OF PCPN...
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........52 PERCENT.
MAX APPARENT TEMP...78.
EYE LEVEL WINDS.....SOUTH WINDS AROUND 3 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTH UP TO 4 MPH
EARLY IN THE MORNING INCREASING TO UP TO 6 MPH.
WIND SHIFT..........
WIND (20 FT)........SOUTH WINDS AROUND 5 MPH EARLY IN THE MORNING
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 6 MPH
EARLY IN THE MORNING INCREASING TO 6 TO 10 MPH.
MIXING HEIGHT.......3900 FT AGL.
TRANSPORT WINDS.....SOUTH 8 TO 12 MPH INCREASING TO 7 TO 16 MPH IN
THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR (2600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (54400 KNOT-FT) IN THE
AFTERNOON.
GFDI................2.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........29 9 19 16 12 8
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
TEMP............54 57 64 72 77 78
RH..............83 87 81 66 56 52
APARNT TMP (F)..54 57 64 72 77 78
20 FT WIND......S 5 S 5 SW 6 S 7 S 9 S 10
20 FT WIND GUST.8 7 9 12 14 15
EYE LEVEL WIND..S 3 S 3 SW 4 S 4 S 5 S 6
EYE LVL WND GST.5 4 5 7 8 9
MIX HGT (FT)....400 800 1500 2400 3300 3900
TRANSPORT WIND..SE 8 S 12 SW 7 S 8 S 13 S 16
GFDI............1 1 1 1 2 3
SDSPL KT-FT/10003 8 9 18 36 54
FORECASTER...ERVIN
REQUESTED BY...ZACHARY SCRIVER
TYPE OF REQUEST...PRESCRIBED
.TAG 2611115.0/DVN
.DELDT 04/21/26
.FORMATTERVERSION 2.0.0
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