FNUS74 KMOB 181509 FWSMOB SPOT FORECAST FOR DESOTO BLOCK 201...US FOREST SERVICE NATIONAL WEATHER SERVICE MOBILE AL 1009 AM CDT THU APR 18 2013 FORECAST IS BASED ON IGNITION TIME OF 1200 CDT ON APRIL 18. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION...A MOIST SOUTHEASTERLY TO SOUTHERLY FLOW WILL CONTINUE ACROSS THE REGION TODAY AHEAD OF A COLD FRONT THAT WILL BE APPROACHING FROM THE WEST TONIGHT. DISPERSIONS WILL BE GOOD THIS AFTERNOON. A LINE OF SHOWERS AND THUNDERSTORMS WILL SPREAD FROM WEST TO EAST ACROSS SOUTHEAST MISSISSIPPI BETWEEN 2 AND 8 AM. FREQUENT LIGHTNING STRIKES AND STRONG WIND GUSTS WILL BE LIKELY WITH THE STRONGER THUNDERSTORMS EMBEDDED WITHIN THE LINE. SOME STORMS POSSIBLY SEVERE. THE COLD FRONT PUSHES EASTWARD ACROSS THE REGION EARLY FRIDAY MORNING WITH NORTHWESTERLY TO NORTHERLY WINDS AND COOLER AIR FOLLOWING IN ITS WAKE. LOWEST DAYTIME RELATIVE HUMIDITY VALUES LOOK TO REMAIN ABOVE CRITICAL LEVELS THROUGH FRIDAY. FOG POTENTIAL AND OTHER REMARKS...WITH APPROACH OF ORGANIZED LINE OF THUNDERSTORMS OVERNIGHT...MIXED LAYERS ABOVE 1000 FEET...FOG IS NOT FORECAST. .TODAY... SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT). SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS IN THE AFTERNOON. MAX TEMPERATURE.....AROUND 86. MIN HUMIDITY........56 PERCENT. WIND (20 FT)........SOUTHEAST WINDS 6 TO 8 MPH INCREASING TO SOUTH 12 TO 15 MPH IN THE LATE MORNING AND AFTERNOON. OCCASIONAL GUSTS TO AROUND 23 MPH. MIXING HEIGHT.......INCREASING TO 5300 FT AGL. MIXING WINDS........SOUTH INCREASING TO 26 TO 29 MPH. DISPERSION INDEX....INCREASING TO 90 (GOOD). LVORI...............DECREASING TO 1. TIME (CDT) NOON 2 PM 4 PM SKY (%)...........63 60 60 WEATHER COV.......S CHC S CHC S CHC WEATHER TYPE......RNSHWR TSTORM TSTORM TEMP..............83 85 84 RH................58 56 59 20 FT WIND DIR....SE S S 20 FT WIND SPD....11 14 14 20 FT WIND GUST...18 23 23 MIX HGT (FT)......3300 5300 4300 MIX HGT (M).......1010 1620 1310 TRANSP WIND DIR...S S S TRANSP WIND SPD...24 29 26 TRANS SPD (M/S)...11 13 12 DISPERSION........61 90 75 LVORI.............1 1 1 CWR...............20 20 20 .TONIGHT... SKY/WEATHER.........MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF THUNDERSTORMS AND SHOWERS EARLY IN THE EVENING...THEN CHANCE OF THUNDERSTORMS AND SHOWERS IN THE EVENING. PERIODS OF THUNDERSTORMS AFTER MIDNIGHT. MIN TEMPERATURE.....AROUND 58. MAX HUMIDITY........93 PERCENT. WIND (20 FT)........SOUTH WINDS 13 TO 15 MPH SHIFTING TO THE WEST AROUND 13 MPH EARLY IN THE MORNING. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS. MIXING HEIGHT.......DECREASING TO 1400 FT AGL. MIXING WINDS........SOUTH 22 TO 26 MPH DECREASING TO AROUND 20 MPH AFTER MIDNIGHT...THEN SHIFTING TO THE WEST AROUND 23 MPH EARLY IN THE MORNING. DISPERSION INDEX....DECREASING TO 27 (FAIR). LVORI...............INCREASING TO 4. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM SKY (%)...........60 82 82 82 100 100 WEATHER COV.......S CHC CHANCE CHANCE CHANCE DEFNTE DEFNTE WEATHER TYPE......TSTORM TSTORM TSTORM TSTORM TSTORM TSTORM TEMP..............79 75 72 70 68 66 RH................68 79 85 90 91 87 20 FT WIND DIR....S S S S S W 20 FT WIND SPD....14 14 12 12 12 12 20 FT WIND GUST...23 22 21 21 21 21 MIX HGT (FT)......4300 2400 2000 2000 1400 2600 MIX HGT (M).......1310 730 610 610 430 790 TRANSP WIND DIR...S S S S S W TRANSP WIND SPD...26 22 22 22 20 23 TRANS SPD (M/S)...12 10 10 10 9 10 DISPERSION........75 29 29 29 22 31 LVORI.............1 3 4 4 4 4 CWR...............20 50 50 50 90 90 .FRIDAY... SKY/WEATHER.........CLOUDY (85-95 PERCENT). THUNDERSTORMS AND RAIN SHOWERS EARLY IN THE MORNING...THEN CHANCE OF RAIN SHOWERS. MAX TEMPERATURE.....AROUND 65. MIN HUMIDITY........44 PERCENT. WIND (20 FT)........WEST WINDS AROUND 13 MPH SHIFTING TO THE NORTHWEST 12 TO 13 MPH. GUSTY AND ERRATIC WINDS EXPECTED NEAR MORNING STORMS. MIXING HEIGHT.......INCREASING TO 4400 FT AGL. MIXING WINDS........WEST AROUND 23 MPH SHIFTING TO THE NORTH 20 TO 21 MPH IN THE MORNING...THEN BECOMING NORTHWEST 15 TO 16 MPH IN THE AFTERNOON. DISPERSION INDEX....INCREASING TO 42 IN THE AFTERNOON (GENERALLY GOOD). LVORI...............DECREASING TO 1. TIME (CDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM SKY (%)...........100 94 94 94 80 80 WEATHER COV.......DEFNTE CHANCE CHANCE CHANCE CHANCE CHANCE WEATHER TYPE......TSTORM RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR TEMP..............63 60 58 59 61 64 RH................77 71 69 61 52 45 20 FT WIND DIR....W NW N N N NW 20 FT WIND SPD....12 12 11 11 12 11 20 FT WIND GUST...21 21 20 20 21 18 MIX HGT (FT)......2600 1900 2200 2200 3400 4400 MIX HGT (M).......790 580 670 670 1040 1340 TRANSP WIND DIR...W NW N N N NW TRANSP WIND SPD...23 21 20 20 16 15 TRANS SPD (M/S)...10 9 9 9 7 7 DISPERSION........31 38 40 40 41 43 LVORI.............4 3 3 3 1 1 CWR...............90 40 40 40 30 30 $$ FORECASTER...10 REQUESTED BY...BOBBY ISER TYPE OF REQUEST...PRESCRIBED .TAG 20130418.DESOT.01/MOB