077 FXUS64 KMAF 121726 AFDMAF AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIDLAND/ODESSA TX 1226 PM CDT SUN MAY 12 2013 .DISCUSSION... PLEASE SEE 18Z AVIATION DISCUSSION BELOW. && .AVIATION... NO AVIATION CONCERNS FOR THE NEXT 24 HOURS...VFR CONDITIONS WILL PERSIST AT ALL TAF SITES. GENERALLY SOUTHEASTERLY WINDS TODAY AROUND 10KT WITH SOME SCATTERED CU AROUND THIS AFTERNOON. && PREV DISCUSSION... /ISSUED 319 AM CDT SUN MAY 12 2013/ DISCUSSION... A REX BLOCK PATTERN WILL AFFECT THE AREA THE NEXT FEW DAYS AS AN UPPER LOW OVER NORTHERN MEXICO UNDERCUTS AN UPPER LEVEL HIGH OVER THE FOUR CORNERS REGION. THIS WILL KEEP RAIN CHANCES IN THE BIG BEND WHICH IS CLOSEST TO THE LOW...THOUGH A SHEARED OUT TROUGH OVER WEST TEXAS WILL ALLOW FOR AFTERNOON CUMULUS AND PERHAPS A FEW ROGUE LIGHT SHOWERS. RAIN CHANCES WILL INCREASE TUESDAY AND COVER MUCH OF THE CWA AS THE UPPER LOW FINALLY EJECTS EAST ACROSS SOUTHWEST TEXAS. ENJOY THE FIRST HALF OF THE FORECAST PERIOD BECAUSE THE SECOND HALF WILL BE A REMINDER THAT SUMMER IS CLOSER THAN WINTER. ZONAL FLOW IN THE WAKE OF THE DEPARTING LOW WILL CAUSE TEMPERATURES TO SOAR ABOVE NORMAL THE LATTER PART OF THE WEEK WITH HIGHS EASILY IN THE 90S WITH SOME 100 DEGREE READINGS ALONG THE RIO GRANDE. HENNIG && .MAF WATCHES/WARNINGS/ADVISORIES... NM...NONE. TX...NONE. && $$ 27