726
FNUS74 KBRO 301313
FWSBRO

Spot Forecast for San Francisco 2...USFWS
National Weather Service Brownsville TX
813 AM CDT Wed Sep 30 2026

Forecast is based on forecast start time of 0900 CDT on September 30.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...Expect relative humidity to fall to around 40
percent this afternoon, with a southeast wind gust up to 25-30 mph
from late morning persisting into or through tonight. Relative
humidity rebounds to 85-90 percent tonight. Moisture increases
into Thursday, with gusty southeasterly winds and a chance of
strong to severe thunderstorms by Thursday afternoon with
occasional to frequent cloud to ground lightning and erratic wind
gusts.

.REST OF TODAY...

Sky/weather.........Mostly sunny (35-45 percent).
Max temperature.....Around 105.
Min humidity........39 percent.
Eye level winds.....Southeast winds 7 to 8 mph with gusts to around
                    16 mph.
Wind (20 ft)........Southeast winds 10 to 13 mph with gusts to
                    around 26 mph.
Mixing height.......6700 ft AGL.
Transport winds.....South 16 to 23 mph.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........48  33  30  32  32  48  48  54  38
Weather cov.....
Weather type....
Tstm cov........
Temp............85  91  95  99  101 103 104 103 102
RH..............81  67  60  50  45  41  39  39  41
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..12  14  14  14  14  14  13  13  14
20 FT wind gust.24  25  26  26  25  25  25  25  26
Eye lvl wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  SE
Eye lvl wnd spd.7   8   8   8   8   8   8   8   8
Eye lvl wnd gst.14  15  16  16  15  15  15  15  16
Mix hgt (kft)...2.6 3.8 4.7 5.4 5.9 6.4 6.7 6.5 6.0
Transp wind dir.SE  S   S   S   S   S   S   SE  SE
Transp wind spd.23  23  22  21  18  17  16  16  17

.TONIGHT...

Sky/weather.........Partly to mostly cloudy (40-55 percent).
                    Slight chance of showers overnight.
Min temperature.....Around 82.
Max humidity........85 percent.
Eye level winds.....Southeast winds 7 to 9 mph with gusts to
                    around 18 mph.
Wind (20 ft)........Southeast winds 10 to 14 mph with gusts to
                    around 30 mph.
Mixing height.......1300 ft AGL.
Transport winds.....Southeast 17 to 25 mph.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........32  37  36  24  30  45  70  41  46  45  57  48
Weather cov.....                        SCH SCH
Weather type....                        RW  RW
Tstm cov........
Temp............100 95  91  89  87  87  86  85  85  83  83  83
RH..............45  54  61  66  70  74  77  78  79  80  81  82
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..15  15  15  15  15  15  15  14  13  13  13  12
20 FT wind gust.28  29  29  29  29  29  30  30  29  28  28  26
Eye lvl wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Eye lvl wnd spd.9   9   9   9   9   9   9   8   8   8   8   7
Eye lvl wnd gst.17  17  17  17  17  17  18  18  17  17  17  16
Mix hgt (kft)...5.1 4.2 3.3 2.5 1.9 1.7 1.8 1.8 1.6 1.5 1.3 1.3
Transp wind dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Transp wind spd.21  23  24  24  25  24  23  22  22  21  18  17

.THURSDAY...

Sky/weather.........Mostly sunny (45-55 percent) then becoming
                    partly sunny (60-70 percent). Chance of showers
                    and thunderstorms in the afternoon.
Max temperature.....Around 103.
Min humidity........42 percent.
Eye level winds.....Southeast winds 5 to 7 mph with gusts to around
                    14 mph.
Wind (20 ft)........Southeast winds 8 to 10 mph with gusts to
                    around 24 mph. Gusty and erratic winds expected
                    near thunderstorms early in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms late in the afternoon.
Mixing height.......5300 ft AGL.
Transport winds.....Southeast 13 to 22 mph.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........46  45  43  39  53  52  59  56  61  55  72  57
Weather cov.....                            SCH CHC CHC CHC CHC
Weather type....                            RW  RW  RW  RW  RW
Tstm cov........                            SCH SCH SCH CHC CHC
Temp............82  82  82  86  91  95  98  100 102 103 101 99
RH..............83  83  85  80  68  61  52  47  45  42  44  50
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..10  10  9   10  12  12  12  10  10  10  10  10
20 FT wind gust.24  23  22  21  22  22  21  20  20  20  20  21
Eye lvl wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Eye lvl wnd spd.6   6   5   6   7   7   7   6   6   6   6   6
Eye lvl wnd gst.14  14  13  13  13  13  13  12  12  12  12  13
Mix hgt (kft)...1.3 1.5 1.9 2.3 2.8 3.5 4.2 4.7 5.1 5.3 4.9 3.5
Transp wind dir.SE  SE  SE  SE  SE  S   S   S   S   SE  SE  SE
Transp wind spd.16  16  20  22  21  20  17  15  14  13  14  15

$$
Forecaster...Hallman
Requested by...Ismael Lerma
Type of request...WILDFIRE
.TAG 2622831.0/BRO
.DELDT 09/30/26
.FormatterVersion 2.0.0
.EMAIL eleazar_fernandez@fws.gov,Ismael_lerma@fws.gov