Spot Forecast
Issued by NWS Austin/San Antonio, TX

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FNUS74 KEWX 181324
FWSEWX

Spot Forecast for J17 Piles...Austin Fire Department
National Weather Service Austin/San Antonio TX
824 AM CDT Thu Apr 18 2024

Forecast is based on ignition time of 0900 CDT on April 18.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Mainly humid and misty this morning before clouds scatter this
afternoon. Warm temperatures in the upper 80s are expected with
dry conditions through the afternoon. Thunderstorms may form as
early as 5 PM, although the more likely timing will be after 7PM
through around midnight. There is a 20-30 percent chance the burn
site will encounter a thunderstorm this evening. Good overnight
recoveries are expected slightly cooler temperatures for tomorrow.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    mostly sunny (25-35 percent). Slight chance of
                    drizzle late in the morning.
CWR.................2 percent.
LAL.................No Tstms.
Max temperature.....Around 87.
Min humidity........63 percent.
Eye level winds.....Southeast winds 5 to 8 mph.
Wind (20 ft)........
 Slope/valley.......South winds 7 to 8 mph.
Mixing height.......3700 ft AGL.
Transport winds.....South 12 to 14 mph.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........85  82  86  79  67  59  38  20  28
Weather cov.....SCH
Weather type....DZL
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1
Temp............72  74  76  77  81  82  83  86  85
RH..............100 93  87  87  77  74  72  63  65
20 FT wind dir..S   S   S   S   S   S   S   S   SE
20 FT wind spd..8   9   10  10  10  10  10  10  10
20 FT wind gust.13  14  15  15  16  16  17  16  16
Eye lvl wnd dir.S   S   S   S   S   S   S   S   SE
Eye lvl wnd spd.5   5   6   6   6   6   6   6   6
Eye lvl wnd gst.8   8   9   9   10  10  10  10  10
Mix hgt (kft)...1.3 1.5 1.7 2.1 2.4 2.7 3.4 3.7 3.3
Transp wind dir.S   S   S   S   S   S   S   S   S
Transp wind spd.12  12  12  12  12  12  13  13  14
Haines index....3   3   3   4   4   4   4   4   4

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (45-55 percent). Slight chance
                    (20-30 percent) of showers and thunderstorms
                    in the evening.
CWR.................2 percent increasing to 19 percent in the
                    evening, then decreasing to 0 percent
                    overnight.
LAL.................No Tstms until 1900, then 1-8 strikes until
                    0100, then No Tstms.
Min temperature.....Around 64.
Max humidity........100 percent.
Eye level winds.....South winds up to 7 mph shifting to the
                    northeast around 4 mph after 3 am.
Wind (20 ft)........
 Slope/valley.......Southeast winds around 8 mph shifting to the
                    south 6 to 9 mph in the evening and overnight,
                    then shifting to the northeast around 5 mph
                    after 3 am. Gusty and erratic winds expected
                    near thunderstorms in the evening.
Mixing height.......600 ft AGL.
Transport winds.....South 9 to 14 mph shifting to the east early in
                    the morning.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........24  35  51  49  57  77  78  77  69  64  60  57
Weather cov.....    SCH SCH SCH CHC CHC CHC
Weather type....    RW  RW  RW  RW  RW  RW
Tstm cov........    SCH SCH SCH SCH SCH SCH
CWR.............0   20  20  20  20  20  20  0   0   0   0   0
LAL.............1   2   2   2   2   2   2   1   1   1   1   1
Temp............84  84  78  74  72  71  71  70  69  68  67  66
RH..............65  65  76  87  87  90  87  90  93  97  100 100
20 FT wind dir..SE  SE  SE  SE  E   S   S   S   S   E   NE  NE
20 FT wind spd..10  12  10  10  10  10  9   7   7   6   6   6
20 FT wind gust.16  16  14  14  15  14  14  10  10  10  9   9
Eye lvl wnd dir.SE  SE  SE  SE  E   S   S   S   S   E   NE  NE
Eye lvl wnd spd.6   7   6   6   6   6   5   4   4   4   4   4
Eye lvl wnd gst.10  10  8   8   9   8   8   6   6   6   5   5
Mix hgt (kft)...2.5 2.1 1.7 1.0 0.7 0.6 0.6 0.6 0.6 0.7 0.8 0.8
Transp wind dir.S   S   S   S   S   S   S   S   S   SE  E   E
Transp wind spd.14  14  14  13  12  10  10  9   9   9   9   9
Haines index....4   4   4   4   4   4   4   4   4   4   4   4

.FRIDAY...

Sky/weather.........Partly sunny (65-75 percent). Patchy fog early
                    in the morning.
CWR.................1 percent.
LAL.................No Tstms.
Max temperature.....Around 79.
Min humidity........64 percent.
Eye level winds.....East winds up to 6 mph.
Wind (20 ft)........
 Slope/valley.......Northeast winds 5 to 8 mph.
Mixing height.......2500 ft AGL.
Transport winds.....Northeast 9 to 12 mph.
Haines Index........3 or very low potential for large plume
                    dominated fire growth.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........78  73  80  69  70  61  59  57  57  57  57  63
Weather cov.....        PTY PTY
Weather type....        FOG FOG
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............66  66  65  67  69  71  74  76  78  79  79  78
RH..............100 97  100 97  87  81  75  69  65  64  64  67
20 FT wind dir..NE  NE  NE  NE  NE  NE  NE  NE  NE  E   E   E
20 FT wind spd..6   6   6   6   6   8   9   9   9   10  10  10
20 FT wind gust.9   9   8   8   10  12  13  14  15  15  15  15
Eye lvl wnd dir.NE  NE  NE  NE  NE  NE  NE  NE  NE  E   E   E
Eye lvl wnd spd.4   4   4   4   4   5   5   5   5   6   6   6
Eye lvl wnd gst.5   5   5   5   6   7   8   8   9   9   9   9
Mix hgt (kft)...0.8 0.8 1.0 1.3 1.5 1.7 2.2 2.4 2.4 2.5 2.5 2.2
Transp wind dir.NE  NE  NE  NE  NE  NE  NE  NE  NE  NE  NE  NE
Transp wind spd.9   9   9   9   9   10  10  10  10  10  12  12
Haines index....3   3   3   3   3   3   3   3   3   3   3   3

$$
Forecaster...27
Requested by...Stev Gibbon
Type of request...PRESCRIBED
.TAG 2411318.0/EWX
.DELDT 04/18/24
.FormatterVersion 2.0.0
.EMAIL steven.gibbon@austintexas.gov


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