FXUS64 KHUN 170549 AAB AFDHUN AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE HUNTSVILLE AL 1249 AM CDT MON MAR 17 2014 .UPDATE... FOR 06Z TAFS && .DISCUSSION... /ISSUED 806 PM CDT SUN MAR 16 2014/ EARLY EVENING SURFACE ANALYSIS SHOWED A BROAD LOW CENTERED ACROSS FAR NE MS/NW AL. A COMPLEX FRONTAL STRUCTURE WAS NOTED IN THE SURFACE OBSERVATIONS...WIND FIELD...AND SATELLITE IMAGERY THIS EVENING. NORTH OF THE SURFACE LOW A SLOW ADVANCING COLD FRONT SEPARATED VERY COLD AIR ACROSS THE NORTHERN TN VLY/OHIO VLY FROM SOMEWHAT UNSTABLE AIR ACROSS PORTIONS OF ALABAMA. ANOTHER FRONT WAS ORIENTED ALONG THE MS/AL BORDER SOUTHWARD THROUGH THE ERN PORTIONS OF LA. THE AFOREMENTIONED COLD FRONT CONTINUES TO MAKE SLOW PROGRESS SINKING SOUTHWARD ACROSS THE AREA THIS EVENING. SCATTERED SHOWERS WERE NOTED FROM HUNTSVILLE TO DOUBLE SPRINGS AND POINTS EAST...OR JUST ALONG/EAST OF THE SFC FRONT. LAPS ANALYSIS SHOWS A NARROW CORRIDOR OF CAPE...MAINLY ALONG THE I-59 CORRIDOR AND ONE CELL IN BLOUNT COUNTY EARLIER PRODUCED SMALL HAIL. EXPECT THE THUNDER THREAT TO SHIFT EAST OVER THE NEXT COUPLE OF HOURS...BUT LIGHT RAIN/DRIZZLE TO LINGER OVERNIGHT AS LOW LEVEL INVERSION SETS UP AND CEILINGS REMAINS AT OR BLOW 800 FEET. NOT EXPECTING SIGNIFICANT QPF HOWEVER AS GENERAL MOTION IS DOWNGLIDE AFTER MIDNIGHT. CURRENT TEMPS RANGE FROM 43 NEAR WRIGHT (LAUDERDALE COUNTY) TO MID 60S NEAR SMITH LAKE. MIN TEMPS OVERNIGHT WILL BE TRICKY AND WILL OBVIOUSLY BE A FUNCTION OF THE FRONTAL POSITION AND SOUTHWARD PUSH OF THE COLDER AIRMASS BEHIND IT. CURRENT MINS DEPICT THE GENERAL (EXPECTED) GRADIENT FAIRLY WELL AND DONT ANTICIPATE MAKING SIGNIFICANT CHANGES BASED ON CURRENT TRENDS. UPDATE WILL BE ISSUED SHORTLY TO UPDATE GRIDS BASED ON CURRENT FRONTAL POSITION AND FOR MINOR TWEAKS TO POPS FOR THE OVERNIGHT PERIOD. 15 && .AVIATION... FOR 06Z TAFS... A COLD FRONT WAS STRETCHED ALONG THE I-59 CORRIDOR AND WILL CONTINUE TO PUSH SOUTH AND EAST OVERNIGHT. LOW CLOUDS/IFR CIGS HAVE OVERSPREAD BOTH TAF SITES LATE THIS EVENING AND EXPECT IFR CEILINGS TO PERSIST AT HSV THROUGH EARLY MONDAY MORNING...WITH MARGINAL IFR/MVFR CIGS AT MSL. WE MAY ALSO SEE A BRIEF PERIOD OF LIFR CONDITIONS AT HSV AND INCLUDED A TEMPO GROUP FOR LATE TONIGHT/EARLY MONDAY. CONDITIONS WILL IMPROVE ONLY SLOWLY ON MONDAY AS LOW LEVEL MOISTURE ASSOCIATED WITH THE FRONTAL BOUNDARY LINGERS OVER THE AREA. 15/70 && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && $$ FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WEATHER.GOV/HUNTSVILLE.
Posted on: Mon, 17 Mar 2014 05:50:28 +0000
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