992  
FXUS64 KFWD 182353  
AFDFWD  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE FORT WORTH TX  
653 PM CDT MON MAR 18 2019  
 
   
AVIATION
 
 
/00Z TAFS/  
 
THE BEAT CONTINUES FOR FLYING CONDITIONS ACROSS NORTH AND CENTRAL  
TEXAS OVER THE NEXT 24-30 HOURS. LIGHT SOUTHEASTERLY FLOW  
OVERNIGHT, PERHAPS VARIABLE AT TIMES, WILL TRANSITION TO MORE  
SOUTHERLY FLOW BY MID/LATE MORNING TUESDAY IN RESPONSE TO AN  
EASTWARD-MIGRATING CYCLONE OVER THE CENTRAL PLAINS. WIND SPEEDS  
WILL GENERALLY BE AROUND 8-10 KT, BUT ISOLATED GUSTS UP TO 15 KT  
WILL BE POSSIBLE DURING THE DAY.  
 
VFR EXPECTED THROUGHOUT THE TAF PERIOD, BUT SCT-BKN CLOUDS AROUND  
100-150 MAY IMPACT TAF SITES AFTER 12Z.  
 
PICCA  
 

 
 
   
SHORT TERM
 
/ISSUED 314 PM CDT MON MAR 18 2019/  
/TONIGHT AND TUESDAY/  
 
A QUIET WEATHER PATTERN CONTINUES INTO TUESDAY, AS WE CONTINUE  
RIGHT UNDERNEATH A CONVERGENT SPLIT FLOW WITHIN THE MID-UPPER  
LEVELS. A SHORTWAVE IS EXPECTED TO LIFT EAST OUT OF NORTHERN  
MEXICO AND THE BIG BEND AND ACROSS CENTRAL/S-CENTRAL TEXAS THROUGH  
TUESDAY MORNING, BEFORE SHIFTING EAST OVER THE NORTHERN GULF OF  
MEXICO TUESDAY AFTERNOON. THE ONLY REPERCUSSION FROM THIS SYSTEM  
WILL BE AN INCREASE OF MID-HIGH LEVEL CLOUDS ABOVE 12,000 FEET, AS  
THE ENVIRONMENTAL LAYER BELOW WILL VERY DRY. THIS DISTURBANCE AND  
ASSOCIATED CLOUD COVER SHOULD HAVE LITTLE IN THE WAY OF INHIBITING  
ANY WARM UP ON TUESDAY, AS IT DEPARTS AWAY FROM THE AREA AFTER  
MIDDAY. AFTER LOWS IN THE 40S, I CHOSE TO LEAN TOWARD WARMER  
GUIDANCE CONSIDERING SURFACE DEW POINTS REMAINING IN THE 30S AND  
THE ABILITY OF PLENTIFUL SUNSHINE TO WORK UPON THE EXPECTED  
DRY AIRMASS BELOW. MUCH OF THE AREA COULD IMPINGE ON THE 70 DEGREE  
MARK, WHILE WHEREVER ELEVATED CLOUDINESS LINGERS, SLIGHTLY COOLER  
TEMPERATURES IN THE MID-UPPER 60S WILL LIKELY PREVAIL DURING THE  
AFTERNOON HOURS.  
 
05/  
 

 
   
LONG TERM
 
/ISSUED 314 PM CDT MON MAR 18 2019/  
/TUESDAY NIGHT THROUGH MONDAY/  
 
A RATHER SHARP, POSITIVELY-TILTED SHORTWAVE WILL BE DROPPING  
THROUGH THE CENTRAL GREAT PLAINS TUESDAY NIGHT. THIS FEATURE WILL  
HELP SEND A WEAK COLD FRONT SOUTH OF THE RED RIVER BY WEDNESDAY  
MORNING, WITH AN ASSOCIATED NORTH WIND SHIFT PRESSING THROUGH OUR  
ENTIRE CWA DURING THE AFTERNOON HOURS. A RATHER MUTED MASS  
RESPONSE AHEAD OF THIS SHORTWAVE WILL KEEP LOW-LEVEL WIND SPEEDS  
FAIRLY WEAK, GREATLY LIMITING THE AMOUNT OF POLEWARD MOISTURE  
TRANSPORT INTO THE REGION AHEAD OF THE AFORMENTIONED COLD FRONT.  
IN ADDITION, THE VAST MAJORITY OF MID-LEVEL DCVA-RELATED ASCENT  
AND HEIGHT FALLS WILL REMAIN DISPLACED IMMEDIATELY TO OUR NORTH  
AND EAST THROUGH THE DAY ON WEDNESDAY. AS A RESULT, CONTINUE TO  
THINK THE PROSPECTS FOR ANY PRECIPITATION REMAIN LOW AND CONFINED  
PRIMARY TO LOCALES NORTH OF I-20. WE'LL SHOW SOME 10-20% CHANCES  
FOR SHOWERS WEDNESDAY MORNING, AND EVEN THAT MAY BE A BIT  
GENEROUS. HIGH TEMPERATURES WILL RANGE FROM NEAR 60 ACROSS OUR  
NORTHERN ZONES, TO THE UPPER 60S/LOWER 70S ACROSS CENTRAL TEXAS.  
 
ANY COLD ADVECTION BEHIND THIS FRONT WILL BE FLEETING, SUCH THAT  
TEMPERATURES ON THURSDAY SHOULD MANAGE TO WARM BACK INTO THE UPPER  
60S/NEAR 70 DEGREE AREA-WIDE.  
 
THE PRIMARY FOCUS DURING THE EXTENDED PORTION OF THE FORECAST  
CONTINUES TO BE ON A SERIES OF WEATHER SYSTEMS WHICH WILL BRING A  
COUPLE OF CHANCES OF SHOWERS AND THUNDERSTORMS TO NORTH AND  
CENTRAL TEXAS INTO EARLY NEXT WEEK. A RATHER AMPLIFIED SPLIT-FLOW  
PATTERN WILL BE IN PLACE AT THE END OF THE THIS WEEK WITH A  
PRETTY WELL ESTABLISHED OMEGA BLOCK IN PLACE. SOMEWHAT  
UNSURPRISINGLY, GLOBAL GUIDANCE CONTINUES TO SLOW THE PROGRESSION  
OF THE PERTINENT UPPER-LOWS/PV ANOMALIES OVER THE GREAT BASIN AS  
THEY ENCOUNTER LINGERING SHORTWAVE RIDGING ACROSS THE CENTRAL US  
ON FRIDAY AND INTO SATURDAY. AS A RESULT, WE'VE CONTINUED TO TRIM  
BACK OUR POP FORECAST ON FRIDAY AND HAVE MOVED ANY LOW (20-40%)  
CHANCES WEST OF THE I-35 CORRIDOR THROUGH THE DAYLIGHT HOURS.  
 
IT LOOKS LIKE SHOWER AND EMBEDDED THUNDERSTORM CHANCES WILL  
FINALLY TICK UPWARDS LATE FRIDAY NIGHT AND INTO SATURDAY MORNING  
WEST OF I-35, WITH THE HIGHEST RAIN CHANCES DEVELOPING AREA-WIDE  
ON SATURDAY AFTERNOON AND EVENING. MARGINAL THERMODYNAMIC  
PROFILES THROUGH THIS PERIOD LOOK TO GREATLY LIMIT ANY AVAILABLE  
INSTABILITY TO A FEW HUNDRED J/KG (SLIGHTLY HIGHER WITH THE MORE  
AMPLIFIED ECMWF). AS A RESULT, I'VE LIMITED THE THUNDER WORDING TO  
ISOLATED IN THE WORDED FORECAST THROUGH SATURDAY NIGHT FOR ALL OF  
NORTH AND CENTRAL.  
 
THE FORECAST BY SUNDAY BECOMES A BIT MORE UNCLEAR. THE ECMWF  
CONTINUES TO DROP AN ADDITIONAL SHORTWAVE INTO THE BROADLY  
CYCLONIC MID-LEVEL FLOW WHICH INITIATES ANOTHER WAVE OF SHOWERS  
AND THUNDERSTORMS ALONG A DRYLINE TO OUR WEST. THE GFS/CMC HOLD  
ANY OF THIS ADDITIONAL MID-LEVEL ENERGY BACK UNTIL MONDAY-TUESDAY.  
SINCE IT'S CLEAR THERE WILL BE A COUPLE OF MID-LEVEL  
PERTURBATIONS LINGERING BEHIND THE INITIAL SATURDAY SYSTEM, WE'LL  
HOLD ONTO SOME LOW GRADE POPS INTO SUNDAY AND INTO MONDAY. THE  
THREAT FOR STRONG-SEVERE STORMS CONTINUES TO LOOK PRETTY LOW THIS  
WEEKEND DUE TO THE AFORMENTIONED LACK OF MORE APPRECIABLE  
INSTABILITY, BUT WE'LL OBVIOUSLY CONTINUE TO MONITOR TRENDS IN  
FORECAST GUIDANCE THIS WEEK.  
 
CARLAW  
 

 
   
PRELIMINARY POINT TEMPS/POPS
 
 
DALLAS-FT. WORTH 48 70 49 66 43 / 0 0 0 10 0  
WACO 45 68 46 70 44 / 0 0 0 10 0  
PARIS 45 67 46 62 40 / 0 0 0 20 5  
DENTON 44 69 47 64 41 / 0 0 0 20 5  
MCKINNEY 44 68 47 64 41 / 0 0 0 20 5  
DALLAS 49 71 49 68 44 / 0 0 0 10 0  
TERRELL 46 69 47 67 42 / 0 0 0 10 0  
CORSICANA 47 69 47 69 43 / 0 0 0 10 0  
TEMPLE 44 68 46 70 44 / 0 0 0 5 0  
MINERAL WELLS 43 69 46 64 40 / 0 0 0 10 5  
 

 
   
FWD WATCHES/WARNINGS/ADVISORIES
 
 
NONE.  

 
 

 
 
11/30  
 
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