Spot Forecast
Issued by NWS Omaha/Valley, NE
Issued by NWS Omaha/Valley, NE
888
FNUS73 KOAX 171110
FWSOAX
Spot Forecast for V&W Middle Unit...IA DNR
National Weather Service Omaha/Valley NE
610 AM CDT Fri May 17 2024
Forecast is based on ignition time of 0900 CDT on May 17.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...
Conditions will remain mostly clear with a few high clouds
entering the area this afternoon. South-southwesterly winds will
increase in speeds early this morning with sustained speeds of
15-18 mph with gusts up to 24 mph possible through this afternoon.
Strong mixing will lead to high temperatures in the upper 80s and
afternoon relative humidity values decreasing to a minimum value
of 28 to 30 percent. Relative humidity values will recover after
sunset. Southerly wind speeds will decrease to sustained speeds
of 10 mph with gusts up to 15 mph overnight.
Strongest Possible Wind Speeds on Day of Burn: 24 mph
Lowest Possible Relative Humidity on Day of Burn: 28 percent
.REST OF TODAY...
Sky/weather.........Sunny (5-15 percent).
Max temperature.....Around 81.
Min humidity........33 percent.
Eye level winds.....South winds up to 9 mph. Gusts up to 23 mph in
the afternoon.
Surface winds (mph).South winds 8 to 15 mph. Gusts up to 23 mph in
the afternoon.
Wind (20 ft)........South winds 7 to 13 mph. Gusts up to 23 mph in
the afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....South 15 to 24 mph.
Smoke dispersal.....Poor (8300 knot-ft) early in the morning
increasing to excellent (99200 knot-ft) in the
afternoon.
GFDI................0.
Haines Index........5 to 6 or moderate to high potential for large
plume dominated fire growth.
TIME (CDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15 15 16 13 4 2 8 5 3
Weather cov.....
Weather type....
Tstm cov........
Temp............63 69 72 74 78 80 81 81 81
RH..............72 63 55 50 42 35 34 33 34
20 FT wind dir..S S S S S S S S S
20 FT wind spd..6 8 10 11 11 12 12 12 12
20 FT wind gust.12 14 14 17 18 18 18 18 18
Eye lvl wnd dir.S S S S S S S S S
Eye lvl wnd spd.4 6 8 8 8 9 9 9 9
Eye lvl wnd gst.9 10 11 13 13 14 14 14 14
Surface wnd dir.S S S S S S S S S
Surface wnd spd.8 10 13 14 14 15 15 15 15
Surface wnd gst.15 17 18 21 22 23 23 23 23
Mix hgt (kft)...0.6 1.1 1.9 3.0 3.5 4.4 4.8 5.0 5.0
Transp wind dir.S S S S S S S S S
Transp wind spd.15 16 17 18 18 21 22 23 24
GFDI............0 0 0 0 0 0 0 0 0
Haines index....6 6 6 6 5 5 5 5 5
SDspl kt-ft/10008 15 26 40 56 77 94 99 79
.TONIGHT...
Sky/weather.........Mostly clear (5-15 percent).
Max humidity........87 percent.
Wind (20 ft)........South winds 10 to 12 mph. Gusts up to 22 mph in
the evening then 20 mph overnight.
TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
Sky (%).........3 3 4 2 5 13
Weather cov.....
Weather type....NONE NONE NONE NONE NONE NONE
Tstm cov........
RH..............34 42 61 70 75 78
20 ft wind......S 11 S 10 S 9 S 9 S 9 S 9
20 ft wind gust.18 16 16 16 16 16
.SATURDAY...
Sky/weather.........Mostly sunny (20-30 percent).
Min humidity........30 percent.
Wind (20 ft)........Southwest winds 10 to 12 mph shifting to the
northwest late in the afternoon.
TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
Sky (%).........41 38 20 19 15 8
Weather cov.....
Weather type....NONE NONE NONE NONE NONE NONE
Tstm cov........
RH..............87 78 62 50 42 35
20 ft wind......S 9 S 9 SW 10 W 11 NW 11 NW 10
20 ft wind gust.16 16 16 16 16 16
.FORECAST DAYS 3 THROUGH 5...
.SUNDAY...
Partly cloudy. Chance of showers and thunderstorms. Lows in the
lower 50s. Highs in the upper 70s. East winds around 8 mph.
.MONDAY...
Showers with thunderstorms likely. Lows in the upper 50s. Highs
in the upper 70s. Southeast winds around 13 mph.
.TUESDAY...
Showers and thunderstorms likely. Lows in the mid 50s. Highs in
the lower 70s. Northeast winds around 8 mph.
$$
Forecaster...Wood
Requested by...Doug Chafa
Type of request...PRESCRIBED
.TAG 2414483.0/OAX
.DELDT 05/17/24
.FormatterVersion 2.0.0
.EMAIL Doug.Chafa@dnr.iowa.gov