FXUS64 KHUN 161009 AFDHUN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HUNTSVILLE AL 509 AM CDT THU MAY 16 2013 .DISCUSSION... MOST OF THE SENSIBLE WEATHER IMPACTS FOR THE TN VALLEY OVER THE SHORT TERM WILL BE EITHER DIRECTLY OR INDIRECTLY ASSOCIATED WITH A CLOSED UPR LOW NOW MOVING ACROSS THE RED RIVER VALLEY. THIS FEATURE WAS PARTIALLY RESPONSIBLE FOR SEVERE WEATHER INCLUDING TORNADOES JUST WEST OF THE DFW METRO YESTERDAY...BUT IS EXPECTED TO WEAKEN AS IT MOVES TOWARD THE TN VALLEY. SEVERE WEATHER CHANCES LOOK RATHER SMALL FOR OUR AREA THROUGH THE END OF THE WEEK AND INTO THE WEEKEND. WEATHER CONDITIONS FOR THE PERIOD BEYOND WILL BECOME INCREASINGLY WARM AS A RIDGE BUILDS OVER THE EASTERN CONUS. HOWEVER...CONFIDENCE IS BUILDING FOR ANOTHER TROUGH AND PERHAPS A SLIGHTLY COOLER AIRMASS FOR MID TO LATE WEEK. MORE DETAILS FOLLOW BELOW. EARLY MORNING ANALYSIS SHOWS THE MAIN BELT OF THE POLAR WESTERLIES CONFINED TO THE CANADIAN/CONUS BORDER...WHILE THE SUBTROPICAL JET EXTENDED ACROSS NORTH-CENTRAL MEXICO INTO THE WESTERN GOM. IN BETWEEN...A CLOSED UPR-LOW WAS MOVING SLOWLY EWRD ACROSS THE OK/TX BORDER REGION...WITH THE CENTER VERY NEAR OK CITY. STANDARD WATER VAPOR IMAGERY INDICATED A REGION OF DRIER AIR WRAPPING AROUND THE SOUTHERN FLANK OF THE LOW...WHICH WAS CORROBORATED BY 00Z SOUNDINGS AND OTHER MULTI-SPECTRAL MODIS/VIIRS AND RGB IMAGERY. REGIONAL RADARS AT 330 AM CDT SHOWED HEAVIER CONVECTION WAS GENERALLY CONFINED TO PORTIONS OF AR AND TX...WHILE A FEW SHOWERS WERE LOCATED IN THE MEMPHIS METRO AND ALONG A NARROW LINE STRETCHING FROM THE MISS DELTA INTO SW ALABAMA. THESE SHOWERS...IN ASSOC/WITH AN AREA OF SHEARED UPR VORTICITY WILL CONTINUE TO ADVANCE EWRD THROUGH THE MORNING. WHILE SOME OF THE RAIN MAY BE REACHING THE SFC...SOME OF THE LIGHTER SHOWERS ALOFT LIKELY ARE NOT REACHING THE SFC DUE TO THE PRESENCE OF A SUBSTANTIALLY DRY MID-LAYER. THIS FEATURE WILL BE PROGRESSIVE THROUGH THE MORNING...AND SHIFT TO OUR EAST BY THE AFTERNOON. HOWEVER...THE MAIN UPR LOW IS LIKELY TO BECOME INCREASINGLY SHEARED W-E AS THE DAY PROGRESSES...WITH WEAK UPR VORT MAXIMA ROTATING THROUGH THE REGION. THE PATTERN WITH THE SUITE OF GUIDANCE IS TOO CHAOTIC TO DISCERN A COHERENT FEATURE...BUT SUFFICE IT TO SAY THAT LIFT ON A SYNOPTIC SCALE WILL BE PRESENT BUT LIKELY WEAK. IN ADDITION...LOW-LEVEL FLOW LOOKS TO BE LARGELY DIFFLUENT IN NATURE. NEVERTHELESS...GIVEN THE CLOUD TRENDS OVER THE LAST SEVERAL HOURS...IT LOOKS AS THOUGH MORE CLEARING AND INSOLATION MAY BE REALIZED LATER THIS AFTERNOON THAN PREVIOUSLY THOUGHT. THIS WOULD LEAD TO GREATER DESTABILIZATION AND PRESENT A HIGHER THREAT OF SHRA/TSTM ACTIVITY...BUT WILL RETAIN THE SLIGHT CHANCE POPS FOR TODAY ATTM GIVEN THE OTHER COMPETING FACTORS. ALTHOUGH THE PARENT UPR LOW IS LIKELY TO WEAKEN OVER THE NEXT COUPLE OF DAYS...IT WILL KEEP A STEADY ADVANCE TO THE EAST. BY LATER TONIGHT...THE MAIN CORE OF THE UPR LOW WILL PROBABLY PUSH INTO WESTERN PORTIONS OF THE TN VALLEY. CONTINUING INSTABILITY AHEAD OF THE FEATURE WILL LIKELY RESULT IN ANOTHER AREA OF DEEP CONVECTION IN THE MID-MISS VALLEY LATER TODAY AHEAD OF THE UPR LOW. ALTHOUGH STEERING FLOW WILL BE SW-W...CONVECTION MAY BE PARTIALLY COLD-POOL DRIVEN...WITH THE POSSIBILITY FOR DEVELOPMENT INCREASING IN OUR AREA TONIGHT. POPS WERE RAISED A LITTLE MAINLY IN THE NW TO ACCOUNT FOR THIS SCENARIO...BUT WERE KEPT AT CHANCE CATEGORY UNTIL A CLEARER PICTURE EMERGES. CHANCES FOR SEVERE WEATHER LOOK RATHER SMALL FOR NOW WITH VERY LOW SHEAR AND MARGINAL CAPE. ON FRIDAY...AS DAYTIME HEATING COMMENCES ALBEIT UNDER A DENSER CLOUD CANOPY...THUNDERSTORM COVERAGE IS LIKELY TO INCREASE. POPS WERE ADJUSTED UPWARD TO ACCOUNT FOR THE GREATER INSTABILITY AND SYNOPTIC LIFT AVAILABLE. SHEAR WILL REMAIN RELATIVELY LOW WITH THIS FEATURE AS IT MOVES ACROSS THE REGION...HOWEVER BRIEF INTENSIFICATION OF THE LOW-LEVEL JET FRIDAY AFTERNOON INTO SAT MORNING MAY ALLOW FOR SOME ORGANIZATION OF STORMS ALONG THE SE FLANK OF THE UPR LOW. WHILE BETTER STORM ORGANIZATION IS MORE LIKELY TO OUR WEST OVER THE MID- MISS VALLEY OR THE WESTERN TN VALLEY...STORMS MAY MAINTAIN ORGANIZATION AS THEY MOVE EWRD INTO PORTIONS OF NW ALABAMA LATE FRIDAY AFTERNOON. SCTD STRONG STORMS WILL PROBABLY PERSIST ACROSS THE AREA INTO FRIDAY EVENING AND THE OVERNIGHT PERIOD. CONTINUED STORM ORGANIZATION IS POSSIBLE WITH AMPLE INSTABILITY...ALTHOUGH THE THREAT FOR SEVERE WEATHER IS LIKELY TO DECREASE WITH THE LOSS OF DAYTIME HEATING. KEPT POPS FOR SATURDAY AS ANOTHER UPSTREAM UPR-WAVE MOVES SWRD INTO THE REGION...PERHAPS MERGING WITH THE PRE-EXISTING UPR TROUGH. INSTABILITY MAY ACTUALLY BE HIGHEST ON THIS DAY...WITH CLOUD COVER THE OBVIOUS CAVEAT. NEVERTHELESS...FORECAST CAPE VALUES EXCEEDING 2000 J/KG SUGGEST STRONG UPDRAFT POTENTIAL. WHILE SHEAR REMAINS GENERALLY WEAK...MARGINALLY SEVERE HAIL COULD STILL OCCUR. THE EFFECTS OF THE COMBINED UPR-LVL SYSTEMS COULD IMPACT THE AREA THROUGH SAT NIGHT...AND PERHAPS INTO THE EARLY PART OF THE DAY ON SUNDAY IN THE EAST. DUE TO THE UNCERTAINTY WITH THE EVENTUAL MOVEMENT OF THE SYSTEM...A SLIGHT CHANCE POP WAS INTRODUCED IN THE EASTERN HALF OF THE AREA FOR SUNDAY. FOR MON-TUES...A RIDGE WILL BUILD QUICKLY IN THE EASTERN CONUS AS THE LARGE SCALE PATTERN BECOMES INCREASINGLY AMPLIFIED. GENERALLY HOT AND DRY WEATHER WILL LIKELY RESULT FOR THE REGION. CURRENTLY...HIGHS IN THE MID/UPR 80S ARE FORECAST FOR MOST LOCATIONS ON MON AND TUES. HOWEVER...SOME GUIDANCE IS INDICATING LOW 90S ARE POSSIBLE AS EARLY AS MONDAY. ALTHOUGH TYPICAL DIFFERENCES STILL EXIST WITH THE GLOBAL GUIDANCE DURING THE MIDDLE OF NEXT WEEK...CONFIDENCE IS SLOWLY INCREASING THAT A PROGRESSIVE TROUGH WILL MOVE INTO THE TN/OH VALLEY REGION BY ABOUT WED. THIS WOULD BRING A CHANCE OF SHOWERS/TSTMS TO THE AREA AND A CHANCE FOR COOLER CONDITIONS. KDW && .AVIATION... /ISSUED 1232 AM CDT THU MAY 16 2013/ FOR 06Z TAFS...EVEN AS MORE HIGH/MID LVL CLOUDS CONTINUE TO STREAM ACROSS THE TERMINALS THRU TOMORROW...VFR CONDITIONS ARE EXPECTED TO PERSIST THRU THE PERIOD. SCT/ISOL -RA MAY ALSO DEVELOP ACROSS AL/TN BTWN 14-18Z BUT SHOULD NOT IMPACT FLT CATEGORIES. AS THE SYSTEM TO OUR W PUSHES CLOSER LATE IN THE PERIOD...CIGS SHOULD START TO DROP BUT CAT DROPS ARE EXPECTED TO HOLD OFF UNTIL AFTER 06Z TOMORROW. CCC && .PRELIMINARY POINT TEMPS/POPS... HUNTSVILLE 84 65 82 67 / 20 30 50 40 SHOALS 85 62 79 68 / 20 30 50 40 VINEMONT 82 62 81 67 / 20 20 40 40 FAYETTEVILLE 82 59 81 65 / 20 30 50 40 ALBERTVILLE 82 63 81 66 / 20 20 40 40 FORT PAYNE 83 59 80 63 / 20 20 40 40 && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && $$ FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WEATHER.GOV/HUNTSVILLE.  FXUS64 KHUN 241046 AFDHUN AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HUNTSVILLE AL 446 AM CST SUN JAN 24 2016 .DISCUSSION... THE LONGWAVE PATTERN ACROSS THE CONUS EARLY THIS MORNING SHOWS A TROUGH EXITING THE EAST COAST (THIS WAS THE TROUGH RESPONSIBLE FOR THE EASTERN SNOW STORM)...WITH A RIDGE STRETCHING S-N ACROSS THE PLAINS STATES...AND ANOTHER TROUGH MOVING THROUGH THE INTERMOUNTAIN WEST. A WARMING AND DRY PATTERN WILL TAKE PLACE UNDERNEATH THE ENCROACHING RIDGE FOR TODAY AND MOST OF MONDAY. HOWEVER...PRECIPITATION CHANCES WILL INCREASE ONCE AGAIN AS THE WESTERN TROUGH BEGINS TO AFFECT THE AREA BY LATE MONDAY AND ESPECIALLY ON TUESDAY. THERE REMAINS A SLIGHT CHANCE FOR A LIGHT WINTRY MIX MAINLY IN NORTHEASTERN AREAS LATE TUESDAY NIGHT AND WEDNESDAY MORNING. COOL WEATHER WILL FOLLOW TO FINISH THE WORK WEEK BUT THEN A WARMING PATTERN IS LIKELY FOR NEXT WEEKEND. MORE DETAILS BELOW. LIGHT WINDS, CLEAR SKY CONDITIONS AND A LIGHT SNOWPACK HAS ALLOWED TEMPS TO FALL INTO THE TEENS TO LOW 20S EARLY THIS MORNING AS A MODIFIED ARCTIC AIRMASS HAS SETTLED OVER THE REGION. SOME DETAILS OF THE SNOWPACK CAN EVEN BE SEEN IN VIIRS DAY-NIGHT BAND IMAGERY PROVIDED BY NASA SPORT. THE ARCTIC HIGH WILL GRADUALLY SHIFT TO THE EAST OF THE AREA TODAY WITH A LIGHT SOUTHERLY SFC FLOW RETURNING THIS AFTERNOON. SUNSHINE WILL ALSO BE ABUNDANT AND CONDITIONS WILL BEGIN TO REBOUND TODAY...BUT DON'T EXPECT A SIGNIFICANT WARMUP AS TEMPS WILL LIKELY ONLY CLIMB INTO THE LOW/MID 40S. NEVERTHELESS...IT WILL AT LEAST FEEL WARMER IN THE SUNSHINE. RIVER UPDATE: THE BIG NANCE CREEK HAS ALREADY CRESTED AND HAS NOW FALLEN BELOW FLOOD STAGE. A FLOOD CANCELLATION WAS JUST ISSUED THERE. THE PAINT ROCK RIVER (AS MEASURED IN WOODVILLE) APPEARS TO BE CRESTING JUST BELOW FLOOD STAGE BUT VALUES HAVE WAVERED A BIT RECENTLY. WE WILL CONTINUE TO WATCH THIS ONE CLOSELY BUT WILL KEEP THE FLOOD WARNING GOING FOR NOW UNTIL CONTINUED DATA SUGGESTS THE RIVER HAS INDEED CRESTED. OTHERWISE...TEMPERATURES WILL WARM INTO MONDAY AS SOUTHERLY FLOW AND WARM AIR ADVECTION INCREASES ACROSS THE AREA. THE TROUGH CURRENTLY IN THE WESTERN CONUS WILL MOVE INTO THE CENTRAL PLAINS BY MONDAY AND PERHAPS AS FAR EAST AS MISSOURI/ARKANSAS BY MONDAY AFTERNOON. INCREASINGLY MOIST S-SWRLY FLOW AHEAD OF THE TROUGH WILL DEVELOP IN THE TN VALLEY. SHALLOW ISENTROPIC ASCENT GENERALLY CONFINED TO LAYERS AOB 850 MB MAY LEAD TO SOME LIGHT RAIN OR DRIZZLE IN ABOUT THE WESTERN HALF OF THE AREA MONDAY AFTERNOON. AS MOISTURE DEEPENS ALONG WITH ISENTROPIC ASCENT...MORE MODERATE RAINFALL IS LIKELY TO OVERSPREAD THE REGION MONDAY NIGHT AND INTO TUESDAY. THE CURRENT SUITE OF REGIONAL/GLOBAL GUIDANCE INDICATES THIS MAY TAKE PLACE ALONG A RELATIVELY NARROW CORRIDOR THAT WILL SLICE SW-NE ACROSS THE AREA. ALTHOUGH RAIN WILL MOSTLY BE STRATIFORM...SOME WEAK CONVECTIVE ENHANCEMENT IS POSSIBLE WITH SOME INSTABILITY NOTED BETWEEN 700-500 MB. THUNDER WILL NOT BE ADDED TO THE FORECAST AT THIS TIME HOWEVER OWING TO THE WEAK NATURE OF THE INSTABILITY. NEVERTHELESS...THIS WILL BE SOMETHING TO WATCH IN FUTURE DATA UPDATES. RAINFALL AMOUNTS MAY TOTAL UP TO ABOUT AN INCH OR PERHAPS SLIGHTLY HIGHER. SOME MINOR NUISANCE FLOODING MAY OCCUR BASED ON THE RELATIVELY HIGH SOIL MOISTURE CONTENT FROM RECENT RAINS. THIS FIRST SHORT WAVE WILL MOVE QUICKLY TO THE NORTHEAST...BUT ANOTHER SHORT WAVE TROUGH WILL MOVE INTO THE SOUTHERN PLAINS AND REINFORCE THE LONG WAVE TROUGH IN THE CENTRAL CONUS. THE TN VALLEY WILL REMAIN IN SWRLY FLOW ALOFT FOR TUESDAY INTO WED. HOWEVER...FLOW WILL BECOME N-NWRLY BELOW ABOUT 700MB INTO EARLY WED. ALTHOUGH THE OVERALL AVAILABILITY OF MOISTURE WILL BE LIMITED AND THE BETTER SYNOPTIC SCALE LIFT WILL TRANSITION TO THE SOUTH...SOME WEAK ASCENT CENTERED IN THE MID-LVLS MAY BE SUFFICIENT TO PRODUCE SOME LIGHT PRECIP LATE TUES NIGHT AND WED. THE TEMPERATURE PROFILE WILL BE CLOSE TO SUPPORTING A MIX OF LIGHT RAIN/SNOW...BUT A POTENTIALLY SIGNIFICANT DRY LAYER BETWEEN ~850-700 MB MAY PREVENT HYDROMETEORS FROM REACHING THE SFC. FOR NOW...HAVE MAINTAINED SOME FCST PERSISTENCE AND RETAINED SLIGHT CHANCE/CHANCE MENTION OF -RA/-SN FOR SOME PORTIONS OF THE AREA...MAINLY IN THE FAR NE. ANYWAY...ANY PRECIP FOR THIS EVENT LOOKS TO BE LIGHT RIGHT NOW AND NOT REALLY IMPACTFUL. NEVERTHELESS...WE WILL CONTINUE TO MONITOR. A BRIEF COOLDOWN WILL FOLLOW AS THE LONGWAVE TROUGH FINALLY MOVES ACROSS THE AREA ON THURS/FRI. BUT...A LARGER WARMUP MAY BE IN STORE FOR THE REGION DURING THE WEEKEND AS A TROUGH LOOKS SET TO DIG IN THE WESTERN CONUS. KDW && .AVIATION... /ISSUED 1054 PM CST SAT JAN 23 2016/ FOR 06Z TAFS...HIGH PRESSURE WILL CONTINUE TO BUILD ACROSS THE TN VALLEY OVERNIGHT AND SUNDAY WITH VFR CONDITIONS THRU THE FCST PERIOD. 007 && .PRELIMINARY POINT TEMPS/POPS... HUNTSVILLE 45 32 56 47 / 0 0 10 70 SHOALS 46 33 58 47 / 0 0 20 80 VINEMONT 46 32 56 48 / 0 0 10 70 FAYETTEVILLE 43 30 53 45 / 0 0 10 70 ALBERTVILLE 45 32 54 48 / 0 0 10 60 FORT PAYNE 43 31 55 45 / 0 0 10 50 && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && $$ FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT WEATHER.GOV/HUNTSVILLE.  FXUS64 KHUN 231025 AFDHUN Area Forecast Discussion National Weather Service Huntsville AL 425 AM CST Thu Feb 23 2017 .NEAR TERM...(Today) Issued at 400 AM CST Thu Feb 23 2017 Moisture advection and shallow isentropic ascent has led to low stratus development around 1.5 to 2.5 kft this morning in eastern areas, generally from Franklin County (TN) southward through much of Jackson and DeKalb Counties. Patchy fog had developed by late in the evening as indicated by several observation sites, however MODIS/VIIRS RGB satellite images have shown that the fog is very limited in coverage and largely located in narrow valleys adjacent to the plateau. Since the low stratus has developed and moved across the area, some, if not most, of this valley fog has dissipated. Elsewhere, patchy fog was present along/near the TN River channel around Wheeler/Wilson Lakes and nearby low-lying communities. Nevertheless, the fog does not appear to be sufficiently dense or widespread to warrant a dense fog advisory at this time. Temperatures have fallen into the mid to upper 50s at most locations early this morning, and will remain near stationary until sunrise. Any remaining fog will quickly dissipate after sunrise this morning. The low stratus currently in the east and in areas to our south will gradually spread farther westward, perhaps into the Huntsville/Decatur metro area later this morning. However, this cloud deck will tend to disperse during the afternoon. Temperatures this afternoon are likely to reach the low/mid 70s for most locations. The most likely adjustments made to the forecast later may be to address issues with cloud cover and impacts to temps though, since the timing of dissipation and extent of the low cloud deck remains a little uncertain. .SHORT TERM...(Tonight through Saturday) Issued at 400 AM CST Thu Feb 23 2017 A broad, partially closed upper low currently in the Western CONUS will move into the Plains states as it phases with a northern stream trough in central Canada tonight and Friday. In response, a surface low will develop and briefly strengthen along the baroclinic boundary stretching across the Plains and Upper Midwest while a surface cold front moves into the Mississippi Valley region. In the warm sector in advance of this front, temperatures may soar into the upper 70s across many locations in the Tennessee Valley. Temperatures as high as 80 degrees may occur particularly in NW Alabama closer to the main axis of strong temperature advection from the SW. Record high temperatures are likely to fall at some locations on Friday. Showers and thunderstorms are expected to develop along the advancing front on Friday, but a significant capping inversion centered around 700-800 mb will tend to keep development at bay in our area until late in the day. To our north, where better instability and dynamical forcing will be present, thunderstorm development is expected to occur earlier. Showers and storms are expected to then develop gradually southward along and ahead of the cold front as it moves across the area Friday evening. So, the best chances for shower/thunderstorm activity will be in the north. CAPE values may reach ~1000 J/KG while deep layer shear in the vicinity of ~50 kts suggests some storm organization will be possible. Sounding profiles suggest "thin" CAPE up through 700 mb, with most of the CAPE above 700 mb to the EL, and dry mid-level conditions with a relatively moist boundary layer. The threat for damaging winds and large hail will be present, but is marginal. Looping hodographs, marginally high effective inflow helicity, and LCLs around 1 km suggest a slight tornado threat during the evening. The threat for strong to severe storms will subside as the cold front moves across the area quickly during the overnight period. Much cooler, but sunny conditions will return for Saturday as a modified Canadian airmass moves into the area. .LONG TERM...(Saturday night through Wednesday) Issued at 400 AM CST Thu Feb 23 2017 Medium range guidance from the global models is in agreement that a zonal flow regime in place over the southern CONUS at the beginning of the extended forecast period will become more amplified on Sunday as a 500-mb trough digs southeastward into WA/OR. A shortwave disturbance crossing the southern Rockies late Sunday is forecast to weaken and eject east-northeastward into the upper OH valley by late Monday afternoon, as prevailing flow downstream from the western CONUS trough backs to the southwest. At the surface, the center of a Canadian surface high will be located across the TN valley on Sunday morning providing ingredients for strong radiational cooling. After morning lows in the u20s/l30s, highs will rebound into the u50s/l60s as the ridge shifts eastward off the Atlantic coast and southeasterly winds strengthen. Return flow will continue to increase Sunday evening, as the southern Rockies disturbance ejects into the Plains and a weak surface low forms near the Red River valley of OK/TX. Strong low-level warm/moist advection east of the low will support widespread showers from the southern Plains into the mid-South region early Monday morning, with this regime expected to impact our forecast area during the day. A few thunderstorms are possible based on amount of elevated CAPE in forecast soundings, but overall instability should be too meager to support a threat for severe convection even with deep-layer shear around 60 knots. The Red River valley surface low will likely begin to degenerate into a baroclinic trough as the parent wave weakens and lifts further into the OH valley late Monday. This boundary may serve as a focal point for additional convection on Monday night/Tuesday, but the influence of this feature should also dissipate with time as the western CONUS longwave begins to push eastward and a new surface low forms in the lee of the central Rockies. Due to uncertainties on where the boundary may lie, we have maintained a chance POP both periods. If clouds and precip are less than anticipated on Tuesday, temperatures could easily be several degrees warmer than values in the current forecast. Convection will likely become fairly widespread to the north/west of the region Tuesday night beneath an intense low-level jet attendant to deepening cyclone ejecting through the Great Lakes and into southern Ontario/Quebec. The trailing cold front is forecast to cross our region Wednesday afternoon, with showers and thunderstorms likely throughout the day. Although shear/instability parameters appear favorable for severe storms both Tuesday night and Wednesday, coverage/intensity of frontal convection will be dictated by coverage of precipitation Tuesday night. A cooler/drier airmass of north Pacific origin will be advected into the region in the wake of this front and linger through the end of the forecast period. && .AVIATION...(For the 06Z TAFS through 06Z Thursday night) Issued at 1130 PM CST Wed Feb 22 2017 Fog is expected to form during the overnight across the area, courtesy of clear skies, light winds, and residual moisture from recent rain. Although some of the fog could become locally dense - especially late tonight, the lowest I went in the TAF was 3/4SM. VFR weather should return shortly after daybreak Thu as an area of high pressure moves east of the region, bringing a SE-S wind in the late morning and afternoon. && .HUN WATCHES/WARNINGS/ADVISORIES... AL...NONE. TN...NONE. && $$ NEAR TERM...KDW SHORT TERM...KDW LONG TERM...70/DD AVIATION...RSB For more information please visit our website at weather.gov/huntsville.