Spot Forecast
Issued by NWS Jacksonville, FL

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445
FNUS72 KJAX 311033
FWSJAX

Spot Forecast for Chacala Burn...Florida Park Service
National Weather Service Jacksonville FL
633 AM EDT Fri May 31 2024

Forecast is based on ignition time of 0700 EDT on May 31.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (904) 741-4370 if you have questions
or concerns with this forecast.

.DISCUSSION...

An isolated, brief shower or thunderstorm will be possible at
the burn site late this afternoon. Otherwise, a dry air mass
will continue today and again on Saturday, with afternoon
relative humidity values falling to the 30-35 percent range
during the afternoon hours. East-northeasterly surface and
transport winds will prevail at the burn site today, followed
by winds shifting slightly to easterly on Saturday. Sustained
speeds will increase to 10-15 mph during the afternoon hours,
and these winds will combine with elevated mixing heights to
create good to marginally high daytime dispersion values this
afternoon and again on Saturday afternoon.

.REST OF TODAY...
TIME (EDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9   11  1   2   5   13  12  9   22  16  15
Weather cov.....                                        SCH
Weather type....                                        RW
Tstm cov........                                        SCH
Chc of pcpn (%).0   0   0   0   0   0   0   0   10  10  20
LAL.............1   1   1   1   1   1   1   1   1   1   2
Temp............67  71  77  83  87  89  91  92  93  94  92
RH..............87  81  65  50  45  40  35  35  35  35  35
Heat index (F)..67  71  77  84  88  89  92  93  94  95  93
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..1   2   3   5   6   7   7   8   9   9   10
20 FT wind gust.2   3   6   7   9   10  10  13  14  14  16
Mix hgt (kft)...0.4 0.5 1.8 3.5 5.0 5.7 6.4 7.2 7.6 7.2 6.8
Transp wind dir.E   E   E   E   E   E   NE  NE  NE  E   E
Transp wind spd.8   9   9   8   8   8   8   9   9   10  12
Dispersion idx..4   10  20  40  50  55  60  65  70  75  65
LVORI...........5   4   3   1   1   1   1   1   1   1   1

.TONIGHT...
TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........15     5      16     19     19     10
Chc of pcpn (%).10     10     0      0      0      0
Temp............90     83     78     74     72     69
RH..............35     45     55     64     71     76
Heat index (F)..90     84     78     74     72     69
20 ft wind......E 12   E 12   E 8    E 6    E 3    E 3
20 ft wind gust.17     17     13     9      6      6
Mix hgt (ft)....5300   1600   600    500    500    500
Transport wind..E 15   E 20   E 16   E 12   E 9    E 9
Dispersion idx..65     20     15     5      4      4
LVORI...........1      2      2      3      3      4

.SATURDAY...
TIME (EDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........13     8      7      14     31     28
Chc of pcpn (%).0      0      0      0      10     10
Temp............68     70     79     85     90     90
RH..............78     78     55     45     35     35
Heat index (F)..68     70     79     86     90     90
20 ft wind......E 5    E 6    E 8    E 10   E 10   E 12
20 ft wind gust.7      9      13     16     16     17
Mix hgt (ft)....600    900    3400   5100   6100   6200
Transport wind..E 10   E 13   E 13   E 12   E 10   E 12
Dispersion idx..5      15     55     70     70     55
LVORI...........4      4      1      1      1      1

$$
Forecaster...Nelson
Requested by...Keith Morin
Type of request...PRESCRIBED
.TAG 2415396.0/JAX
.DELDT 05/31/24
.FormatterVersion 2.0.0
.EMAIL keith.morin@floridadep.gov