Spot Forecast
Issued by NWS Houston/Galveston, TX

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Spot Forecast for Mad Island Marsh Preserve RX...The Nature Conservancy - TX
National Weather Service Houston/Galveston TX
623 AM CDT Thu Aug 28 2025

If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Showers and thunderstorms will remain a daily occurrence for the
late portion of this week, though coverage may be somewhat
limited
compared to previous days. This should result in slightly hotter
and drier conditions for most, with relative humidity falling to
the 40s or around 50 percent inland. Closer to the coast, look
for
RH to stay up in the 50-60 percent range. Winds will be light and
fairly variable, but mostly south to southeast prior to a front
arriving this weekend. This front will bring back increased storm
coverage over the weekend, followed by a modest bit of drier air
filtering in well inland early next week.


.REST OF TODAY...
TIME (CDT)      2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P
Sky cover.......PC  PC  PC  PC  PC  PC  MCR MCR MCR MCR MCR
Sky (%).........28  29  34  30  27  31  14  11  14  16  13
Weather cov.....    SCH SCH     SCH SCH SCH
Weather type....    RW  RW      RW  RW  RW
Tstm cov........    SCH SCH     SCH SCH SCH
CWR.............10  20  20  10  20  20  20  10  10  10  0
Temp............81  81  84  86  86  87  87  89  89  89  87
RH..............85  85  80  75  75  72  72  68  66  66  70
Aparnt tmp (F)..87  87  94  97  97  99  99  102 100 100 98
20 FT wind dir..S   S   S   S   SW  S   S   S   S   S   S
20 FT wind spd..6   6   6   6   7   8   8   9   9   10  10
20 FT wind gust.10  10  10  10  10  10  12  13  13  14  14
Mix hgt (kft)...0.4 0.5 1.5 2.5 3.0 3.3 3.3 3.4 3.2 3.1 3.0
Mix hgt (km)....0.1 0.2 0.5 0.8 0.9 1.0 1.0 1.0 1.0 0.9 0.9
Transp wind dir.S   S   S   SW  SW  S   S   S   S   S   S
Transp wind spd.8   6   7   9   8   9   9   10  12  13  14
Trans wind dir..S   S   S   SW  SW  S   S   S   S   S   S
Trans spd (m/s).4   3   3   4   4   4   4   4   5   6   6
Ceiling (kft)...25  11  11  25  11  11  11  25  25  25  25
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10

.TONIGHT...
TIME (CDT)      1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P MID
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR PC  MCR
Sky (%).........14  10  12  11  12  14  8   15  19  25  26  21
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   10  10
Temp............86  86  84  83  83  82  83  82  82  82  82  82
RH..............72  75  80  82  82  85  82  82  82  85  82  85
Aparnt tmp (F)..96  97  94  92  92  90  92  89  89  90  89  90
20 FT wind dir..S   S   S   S   S   S   S   S   S   S   S   S
20 FT wind spd..10  9   9   9   9   9   9   9   9   9   9   8
20 FT wind gust.15  15  15  15  16  15  15  15  15  15  15  15
Mix hgt (kft)...2.6 1.9 0.9 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.5
Mix hgt (km)....0.8 0.6 0.3 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.2
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.14  14  14  15  16  16  15  15  14  15  14  14
Trans wind dir..S   S   S   S   S   S   S   S   S   S   S   S
Trans spd (m/s).6   6   6   7   7   7   7   7   6   7   6   6
Ceiling (kft)...25  25  25  25  25  25  25  25  25  25  25  25
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10  10

.FRIDAY...
TIME (CDT)      1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P
Sky cover.......MCR PC  MCR MCR MCR MCR MCR MCR MCR MCR MCR MCR
Sky (%).........18  31  25  22  17  16  15  13  15  17  19  20
Weather cov.....
Weather type....
Tstm cov........
CWR.............10  10  10  10  10  10  10  10  10  10  10  10
Temp............82  81  83  85  87  88  89  89  89  89  89  88
RH..............82  85  82  77  72  70  68  68  65  65  68  69
Aparnt tmp (F)..89  87  92  96  99  101 101 102 101 101 102 101
20 FT wind dir..S   SW  S   S   S   S   S   S   S   S   S   S
20 FT wind spd..8   8   8   8   8   9   8   8   9   10  10  10
20 FT wind gust.14  14  14  13  13  12  12  12  13  13  14  14
Mix hgt (kft)...0.4 0.4 2.0 3.0 3.4 3.7 3.8 3.8 3.6 3.4 3.2 2.9
Mix hgt (km)....0.1 0.1 0.6 0.9 1.0 1.1 1.2 1.2 1.1 1.0 1.0 0.9
Transp wind dir.S   S   S   SW  SW  SW  SW  SW  SW  S   S   S
Transp wind spd.13  13  10  9   9   10  10  10  10  12  12  12
Trans wind dir..S   S   S   SW  SW  SW  SW  SW  SW  S   S   S
Trans spd (m/s).6   6   4   4   4   4   4   4   4   5   5   5
Ceiling (kft)...25  25  25  25  25  25  25  25  25  25  25  25
Visibility (sm).10  10  10  10  10  10  10  10  10  10  10  10

$$
Forecaster...Adams
Requested by...Steven Goertz
Type of request...PRESCRIBED
.TAG 2520873.0/HGX
.DELDT 08/28/25
.FormatterVersion 2.0.0
.EMAIL sgoertz@tnc.org