045  
FNUS74 KEWX 190226  
FWSEWX  
 
SPOT FORECAST FOR FRIO COUNTY...TEXAS A&M FOREST SERVICE  
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX  
926 PM CDT SUN AUG 18 2019  
 
FORECAST IS BASED ON FORECAST START TIME OF 2200 CDT ON AUGUST 18.  
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER  
SERVICE.  
   
DISCUSSION
 
 
SOUTHEAST WINDS 10 TO 15 MPH WILL CONTINUE TO GUST INTO THE 20 TO  
25 MPH RANGE THROUGH MIDNIGHT WITH WINDS BEGINNING TO WEAKEN  
AFTER MIDNIGHT. AS WINDS FALL BELOW 10 MPH DURING THE PRE-DAWN  
HOURS ON MONDAY MORNING, THE DIRECTION MAY VARY BETWEEN SOUTHEAST  
AND SOUTH. MIXING HEIGHTS ARE EXPECTED TO FALL BELOW 500 FEET BY  
SUNRISE AS A LOWER CLOUD DECK BUILDS ACROSS THE BURN SITE. MIXING  
HEIGHTS WILL RAPIDLY LIFT MONDAY AS LOW CLOUDS SCATTER OUT BETWEEN  
9 AND 11 AM. INCREASED MIXING AS LOW CLOUDS SCATTER OUT MAY  
RESULT IN HUMIDITIES LOWER THAN 30 PERCENT AT THE WILDFIRE SITE  
MONDAY AFTERNOON.  
   
REST OF TONIGHT
 
 
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING  
MOSTLY CLOUDY (50-60 PERCENT).  
CWR.................0 PERCENT.  
LAL.................NO TSTMS.  
MIN TEMPERATURE.....AROUND 77.  
MAX HUMIDITY........90 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS UP TO 10 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 6 TO 14 MPH.  
MIXING HEIGHT.......400 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 14 TO 22 MPH.  
HAINES INDEX........3 TO 5 OR VERY LOW TO MODERATE POTENTIAL FOR  
LARGE PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 10P 11P MID 1AM 2AM 3AM 4AM 5AM  
SKY (%).........14 19 25 30 38 46 54 59  
WEATHER COV.....  
WEATHER TYPE....  
TSTM COV........  
CWR.............0 0 0 0 0 0 0 0  
LAL.............1 1 1 1 1 1 1 1  
TEMP............88 85 83 81 81 80 79 78  
RH..............57 63 67 72 75 79 81 85  
20 FT WIND DIR..SE SE SE SE SE SE SE SE  
20 FT WIND SPD..13 13 11 9 9 7 6 6  
20 FT WIND GUST.21 20 18 13 12  
EYE LVL WND DIR.SE SE SE SE SE SE SE SE  
EYE LVL WND SPD.10 10 8 7 7 5 4 4  
EYE LVL WND GST.14 14 12 10 9 5  
MIX HGT (KFT)...2.4 2.1 1.6 1.4 1.1 0.7 0.4 0.5  
TRANSP WIND DIR.SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.18 20 21 22 21 18 16 14  
HAINES INDEX....3 3 4 4 4 5 5 5  
   
MONDAY
 
 
SKY/WEATHER.........PARTLY SUNNY (45-55 PERCENT) THEN BECOMING  
MOSTLY SUNNY (25-35 PERCENT).  
CWR.................0 PERCENT.  
LAL.................NO TSTMS.  
MAX TEMPERATURE.....AROUND 102.  
MIN HUMIDITY........30 PERCENT.  
EYE LEVEL WINDS.....SOUTHEAST WINDS UP TO 7 MPH.  
WIND (20 FT)........  
SLOPE/VALLEY.......SOUTHEAST WINDS 5 TO 9 MPH.  
MIXING HEIGHT.......7800 FT AGL.  
TRANSPORT WINDS.....SOUTHEAST 10 TO 16 MPH.  
HAINES INDEX........3 TO 5 OR VERY LOW TO MODERATE POTENTIAL FOR  
LARGE PLUME DOMINATED FIRE GROWTH.  
 
TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM  
SKY (%).........65 70 64 59 53 43 33 23 26 29 32 29  
WEATHER COV.....  
WEATHER TYPE....  
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............77 77 79 81 85 89 94 97 100 101 102 102  
RH..............90 90 86 78 67 55 46 40 35 33 30 30  
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE  
20 FT WIND SPD..5 5 6 6 7 7 7 7 7 7 8 9  
20 FT WIND GUST. 11 12  
EYE LVL WND DIR.SE SE SE SE SE SE SE SE SE SE SE SE  
EYE LVL WND SPD.4 4 4 4 5 5 5 5 5 5 6 7  
EYE LVL WND GST. 5 8 9  
MIX HGT (KFT)...0.7 0.7 1.6 3.3 4.1 4.9 6.3 7.1 7.3 7.6 7.8 7.7  
TRANSP WIND DIR.SE SE SE SE SE SE SE SE SE SE SE SE  
TRANSP WIND SPD.12 10 10 10 10 12 12 13 14 14 15 16  
HAINES INDEX....5 5 5 4 4 4 3 3 3 3 3 3  
 

 
FORECASTER...14  
REQUESTED BY...MELINDA HORN  
TYPE OF REQUEST...WILDFIRE  
.TAG 1914008.0/EWX  
.DELDT 08/18/19  
.FORMATTERVERSION 1.0.26  
.EMAIL CSDISPATCH@TFS.TAMU.EDU  
 
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