Spot Forecast
Issued by NWS Omaha/Valley, NE

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FNUS73 KOAX 221255
FWSOAX

Spot Forecast for Brush pile burning...Iowa DNR
National Weather Service Omaha/Valley NE
755 AM CDT Fri Mar 22 2024

Forecast is based on ignition time of 0900 CDT on March 22.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Cloudy and blustery conditions prevail today. The remainder of the
day should be dry. Northerly winds at 15 to 20 mph, with potential
gusts 20 to 25 mph. Humidity could drop into the lower 50s percent.


Strongest Possible Wind Speeds on Day of Burn: 25 mph

Lowest Possible Relative Humidity on Day of Burn: 50 percent

.REST OF TODAY...

Sky/weather.........Cloudy (85-95 percent).
Max temperature.....Around 43.
Min humidity........53 percent.
Eye level winds.....North winds 9 to 11 mph.
Surface winds (mph).North winds 15 to 19 mph.
Wind (20 ft)........North winds 13 to 16 mph.
Mixing height.......4000 ft AGL.
Transport winds.....North 18 to 23 mph.
Smoke dispersal.....Fair (20900 knot-ft) early in the morning
                    increasing to excellent (75900 knot-ft) in the
                    afternoon.
GFDI................6.
Haines Index........2 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........96  98  99  98  97  96  93  90  83
Weather cov.....
Weather type....
Tstm cov........
Temp............34  35  37  38  40  41  41  42  40
RH..............89  89  82  76  68  63  60  53  55
20 FT wind dir..N   N   N   N   N   N   N   N   N
20 FT wind spd..12  13  13  14  15  14  14  13  13
20 FT wind gust.18  18  18  19  20  18  18  18  18
Eye lvl wnd dir.N   N   N   N   N   N   N   N   N
Eye lvl wnd spd.9   10  10  11  11  11  11  10  10
Eye lvl wnd gst.13  14  14  14  15  14  14  13  13
Surface wnd dir.N   N   N   N   N   N   N   N   N
Surface wnd spd.15  16  16  18  19  18  18  16  16
Surface wnd gst.22  23  23  24  25  23  23  22  22
Mix hgt (kft)...1.4 1.5 2.1 2.6 3.0 3.4 3.7 4.0 3.9
Transp wind dir.N   N   N   N   N   N   N   N   N
Transp wind spd.18  20  21  23  23  22  22  22  21
GFDI............4   4   5   6   7   7   7   7   7
Haines index....2   2   2   2   2   2   2   2   2
SDspl kt-ft/100021  26  36  49  61  68  73  75  76

.TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent) then becoming
                    partly cloudy (25-35 percent).
Min temperature.....Around 22.
Max humidity........76 percent.
Eye level winds.....Northeast winds up to 9 mph in the evening and
                    overnight becoming light.
Surface winds (mph).Northeast winds 6 to 15 mph in the evening and
                    overnight becoming light.
Wind (20 ft)........Northeast winds 5 to 12 mph in the evening and
                    overnight becoming light.
Mixing height.......500 ft AGL.
Transport winds.....North 12 to 21 mph shifting to the northeast 9
                    to 10 mph overnight.
Smoke dispersal.....Excellent (72900 knot-ft) early in the evening
                    decreasing to poor (4100 knot-ft) late in the
                    night.
GFDI................4.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........82     67     10     5      29     49
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Temp............39     34     30     27     26     25
RH..............54     61     69     71     71     74
20 ft wind......N 12   N 9    N 7    N 6    NE 6   NE 4
20 ft wind gust.17     14     16     13     10     7
Eye level wind..N 9    N 7    N 5    N 4    NE 4   NE 3
Eye lvl wnd gst.13     11     12     10     7      5
Surface wind....N 15   N 11   N 9    N 8    NE 8   NE 5
Surface wnd gst.21     18     20     16     12     9
Mix hgt (ft)....3900   1500   900    1000   500    500
Transport wind..N 21   N 16   N 14   NE 13  NE 10  NE 9
GFDI............6      4      3      2      1      1
Haines index....2      3      3      3      3      3
SDspl kt-ft/100073     47     11     7      7      4

.SATURDAY...

Sky/weather.........Partly sunny (65-75 percent) then becoming
                    mostly cloudy (80-90 percent). Chance of snow
                    in the late morning and early afternoon. Slight
                    chance of snow late in the afternoon.
Max temperature.....Around 40.
Min humidity........44 percent.
Eye level winds.....Light winds becoming east up to 5 mph in the
                    morning, then shifting to the southeast 6 to 10
                    mph in the afternoon.
Surface winds (mph).Light winds becoming east 6 to 9 mph in the
                    morning, then shifting to the southeast 10 to
                    16 mph in the afternoon.
Wind (20 ft)........Light winds becoming east 5 to 8 mph in the
                    morning, then shifting to the southeast 9 to 14
                    mph in the afternoon.
Mixing height.......4000 ft AGL.
Transport winds.....East 9 to 18 mph shifting to the southeast 21
                    to 24 mph late in the afternoon.
Smoke dispersal.....Poor (9400 knot-ft) early in the morning
                    increasing to excellent (80200 knot-ft) in the
                    afternoon.
GFDI................5.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........51     60     77     84     88     89
Weather cov.....              CHANCE CHANCE CHANCE S CHC
Weather type....NONE   NONE   SNOW   SNOW   SNOW   SNOW
Tstm cov........
Temp............24     23     29     33     38     40
RH..............76     72     55     50     46     45
20 ft wind......NE 4   E 5    E 6    SE 8   SE 10  SE 12
20 ft wind gust.8      10     10     11     14     18
Eye level wind..NE 3   E 4    E 4    SE 6   SE 8   SE 9
Eye lvl wnd gst.6      7      7      8      10     13
Surface wind....NE 5   E 6    E 8    SE 10  SE 13  SE 15
Surface wnd gst.10     12     12     14     17     22
Mix hgt (ft)....600    1800   2000   3000   3500   4000
Transport wind..E 9    E 9    E 10   E 13   SE 18  SE 23
GFDI............1      1      2      3      5      7
Haines index....3      3      3      3      3      3
SDspl kt-ft/10009      14     18     36     62     80

$$
Forecaster...NWS Omaha/Valley
Requested by...Jeff Seago
Type of request...PRESCRIBED
.TAG 2408178.0/OAX
.DELDT 03/22/24
.FormatterVersion 2.0.0
.EMAIL jeffrey.seago@dnr.iowa.gov


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