Aikyam-Lab/Synoptic-Bench huggingface dataset:
410 PM EDT TUE JUN 30 2015 LOW PRESSURE WILL MAKE ITS WAY ACROSS SOUTHERN ONTARIO TONIGHT INTO WEDNESDAY. A COLD FRONT SHOULD CROSS THE REGION WEDNESDAY EVENING INTO THE OVERNIGHT.
1257 PM CDT TUE JUN 30 2015 PESKY CLOUDS HANGING IN BEHIND THE COLD FRONT OVER THE MISS RIVER AND WI IN THE INVERTED ENVIRONMENT. LATEST 07Z SURFACE ANALYSIS INDICATED WEAK COLD FRONT EXTENDING FROM SOUTHERN ONTARIO INTO NORTHEAST NEBRASKA.
319 PM EDT TUE JUN 30 2015 UNSEASONABLY DEEP UPPER LEVEL TROUGH REMAINS OVER THE GREAT LAKES REGION THIS AFTERNOON. BROAD LOW PRESSURE WILL MAKE SLOW EASTWARD PROGRESS OUT OF OUR CWA TONIGHT.
FOLLOWED BY A WARMING TREND AND DRIER CONDITIONS AS HIGH PRESSURE SETTLES OVER THE AREA. NEW MODEL GUIDANCE SUGGESTS THAT MOST OF THE AREA SAVE FOR THE NORTHERN COUNTIES AND THE RIDGES MAY REMAIN DRY. WITH HIGH PRESSURE BUILDING AT THE SURFACE AND A SURFACE BOUNDARY REMAINING JUST SOUTH OF THE MASON DIXON LINE.
WOULD BE OVER THE FAR WEST AS DRIER HIGH PRESSURE BEGINS TO SLIDE INTO THE AREA. THE AFOREMENTIONED DRY HIGH PRESSURE SYSTEM WILL SLIDE DIRECTLY OVERHEAD. AS LOW AS THE LOW 40S. GFS AND ECMWF SHOW A BROAD 500 MB TROUGH OVER THE GREAT LAKES REGION 12Z FRI. THIS TROUGH REMAINS OVER THE AREA 12Z SAT. ANOTHER 500 MB TROUGH TOPS THE 500 MB RIDGE OVER THE ROCKIES 12Z SUN AND AFFECTS THE UPPER GREAT LAKES 12Z MON. DISSIPATING COLD FRONT DAY WITH SLIGHT CHANCE POPS INLAND AND THEN NEXT COLD FRONT COMES THROUGH ON MON WITH CHANCE POPS FOR SUN NIGHT INTO MON. NORTH WINDS BEHIND THE PASSING COLD FRONT WILL ALLOW WINDS TO GUST TO AROUND 25 KNOTS THROUGH THIS AFTERNOON. HIGH PRESSURE WILL QUICKLY BUILD IN TONIGHT. THE ARRIVAL OF DRIER AIR ASSOCIATED WITH THE HIGH PRESSURE SYSTEM.
259 PM CDT TUE JUN 30 2015 TROUGH AXIS CURRENTLY ALIENED N-S ACROSS THE MID STATE THIS AFTERNOON. AFOREMENTIONED UPPER TROUGH AXIS WILL SHIFT EAST ON WEDNESDAY. DEAMPLIFICATION IS EXPECTED WITH A BROAD TROUGH INDUCED NORTHWESTERLY FLOW OVER MIDDLE TN. UPPER TROUGHING PATTERN TO REMAIN ALONG WITH SEGMENTATION. UPPER RIDGING WILL STRENGTHEN ACROSS THE SOUTHERN PLAINS AND BOOST ARE HEIGHTS A BIT.
448 PM CDT Tue Jun 30 2015 The upper level ridge positioned across the western half of the CONUS has kept the local region under northwest flow aloft. Additional CCN has likely allowed the cirrus deck to become a bit thicker than it might have under normal circumstances, keeping temperatures a bit cooler across much of the CWA this afternoon. A more active period of weather will begin tonight with several rounds of convective activity expected through the remainder of the week as multiple disturbances round the ridge.
336 PM CDT TUE JUN 30 2015 CURRENT H5 ANALYSIS PLACES A DEEP TROUGH OVER THE EASTERN CONUS. WITH A STRONG RIDGE CENTERED OVER THE ROCKIES. AND WILL CONTINUE TO PROVIDE COOLER THAN NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION AMOUNTS TO THE REGION THROUGH THE HOLIDAY WEEKEND.
414 PM CDT TUE JUN 30 2015 A RIDGE OF HIGH PRESSURE CONTINUES TO SIT OVER THE WESTERN US WITH A TROUGH OVER THE EASTERN US.
646 PM EDT TUE JUN 30 2015 ATLANTIC HIGH PRESSURE WILL RESIDE ACROSS THE AREA WHILE A TROUGH OF LOW PRESSURE PERSISTS INLAND. THE FORECAST AREA WILL RESIDE ON THE WESTERN PERIPHERY OF ATLANTIC HIGH PRESSURE WHILE A PIEDMONT TROUGH REMAINS INLAND. A DEEP AREA OF LOW PRESSURE WILL TRACK OVER THE GREAT LAKES REGION MIDWEEK WITH A TROUGH AXIS THAT EXTENDS SOUTHWARD NEAR THE SOUTHEASTERN UNITED STATES. HIGH TEMPS ARE EXPECTED TO PEAK IN THE LOW TO MID 90S. OVERNIGHT LOWS WILL RANGE IN THE LOW TO MID 70S AWAY FROM THE COAST.
345 PM CDT TUE JUN 30 2015 CURRENTLY, THE 19Z VISIBLE AND IR IMAGERY SHOWS THE MAJOR TROUGH OVER THE EASTERN CONUS AND THE RIDGE AXIS OVER THE GREAT BASIN EXTENDING UP INTO THE NORTHERN ROCKIES WITH NORTHWEST FLOW STILL IN BETWEEN. TEMPS WILL LIKELY RISE INTO THE LOW 90S.
302 PM EDT TUE JUN 30 2015 A WARM FRONT WILL MOVE ACROSS THE MIDDLE SUSQUEHANNA AND NORTH CENTRAL MOUNTAINS LATE THIS AFTERNOON AND EVENING. A COLD FRONT WILL PUSH SOUTHEAST ACROSS THE REGION LATER TONIGHT AND WEDNESDAY.
324 PM CDT TUE JUN 30 2015 12Z UA ANALYSIS HAS AN 850MB LOW OVER LOWER MICHIGAN WITH A WEAK TROF INTO SOUTHERN ILLINOIS. AN 850MB WARM FRONT RAN FROM NORTHEAST MONTANA INTO CENTRAL NEBRASKA. 18Z SFC DATA HAS A WEAK TROF FROM LOWER MICHIGAN INTO NORTHEAST MISSOURI. THERE IS A GOOD INDICATION THAT EASTERN IOWA AND NORTHWEST ILLINOIS WILL FINALLY BE UNDER THE INFLUENCE OF GREAT LAKES HIGH PRESSURE FOR SEVERAL DAYS.
A COLD FRONT WILL MAKE ITS WAY INTO KGUY AROUND 18Z TOMORROW BUT WONT MAKE IT INTO KDHT BEFORE 00Z. SUBSIDENCE FROM EXPANDING UPPER RIDGE ACROSS THE WESTERN HALF OF THE COUNTRY WILL KEEP OUR REGION DRY TODAY.
THE LOW AT THE KEY WEST INTERNATIONAL AIRPORT THIS MORNING WAS 84 DEGREES. THE HAZE IS DUE TO THE SAHARAN AIR LAYER MOVING OVER THE AREA AND IS HELPING SUBDUE CLOUD DEVELOPMENT IN THE LOWER TROPOSPHERE. A TROUGH OVER THE EASTERN UNITED STATES WILL LIFT OUT TUESDAY NIGHT AND WEDNESDAY MORNING. THE ATLANTIC RIDGE WILL STRENGTHEN AND GAIN LATITUDE RESULTING IN AN INCREASE IN WINDS OUT OF THE EAST TO SOUTHEAST ON WEDNESDAY.
A MID LVL RIDGE WILL BUILD INTO THE REGION FROM THE WEST AND THIS WILL DRIVE A DRIER MID LVL AIR MASS OVER THE AREA. FOR THE HOLIDAY WEEKEND THE MID TO UPPER RIDGE WILL RETROGRADE SOMEWHAT AND ALLOW SCATTERED AFTERNOON CONVECTION TO RETURN TO THE AREA. THE SUBTROPICAL RIDGE WILL REMAIN OVER THE NORTHERN GULF THROUGH THE PERIOD.
A WEAK COLD FRONT EDGING SOUTHWARD THROUGH CENTRAL IL HAS A FEW ISOLATED CELLS ALONG IT THAT ARE MAINLY DIURNALLY DRIVEN.
347 PM EDT TUE JUN 30 2015 LOW PRESSURE WILL TRACK WEST OF MAINE WEDNESDAY.
237 PM EDT TUE JUN 30 2015 SKIES WILL CONTINUE TO CLEAR THIS EVENING IN THE WAKE OF THE COLD FRONT WHICH MOVED THROUGH THE AREA. LOW CLOUDS HAVE OVERTAKEN MUCH OF THE FORECAST AREA COURTESY MOIST BOUNDARY LAYER CONDITIONS FROM RECENT RAINFALL AS WELL AS INCREASING HUMIDITY AHEAD OF AN APPROACHING WAVE AND COLD FRONT. THIS ARE ASSOCIATED WITH AN APPROACHING UPPER LEVEL WAVE THAT IS EXPECTED TO DEEPEN SOMEWHAT TODAY WITH A COLD FRONT SWEEPING IN THIS AFTERNOON. SERIES OF SHRTWV'S OVER SWRN CANADA/NE PAC EXPECTED TO TOP WRN RIDGE AND DROP SEWD INTO THE MID MS/LWR OH VALLEY MID-WEEK. REMAINING FAR ENOUGH SOUTH OF OUR CWA FOR DRY WX HERE WED-THU AS HIGH PRESSURE MOVG SLOWLY EAST ACROSS THE GRTLKS DOMINATES.
1117 AM MDT TUE JUN 30 2015 UPPER RIDGE BUILDS SLOWLY EASTWARD TODAY. LEADING TO WARMER TEMPS AND ANOTHER AFTERNOON OF RATHER PALTRY CONVECTION. STILL ENOUGH MOISTURE OVER THE MOUNTAINS TO PRODUCE ISOLATED STORMS ACROSS THE HIGHER TERRAIN THIS AFTERNOON.
1115 AM MDT TUE JUN 30 2015 UPPER HIGH CENTERED NR SLC PER MORNING SATELLITE IMAGERY. UPPER HIGH WILL FLATTEN AND BEGIN SHIFTING WEST THRU THE GREAT BASIN. FORTUNATELY TEMPERATURES WILL BE AROUND 5F COOLER.
412 PM EDT TUE JUN 30 2015 ATLANTIC HIGH PRESSURE WILL RESIDE ACROSS THE AREA WHILE A TROUGH OF LOW PRESSURE PERSISTS INLAND. THE FORECAST AREA WILL RESIDE ON THE WESTERN PERIPHERY OF ATLANTIC HIGH PRESSURE WHILE A PIEDMONT TROUGH BECOMES MORE PRONOUNCED INLAND. A DEEP AREA OF LOW PRESSURE WILL TRACK OVER THE GREAT LAKES REGION MIDWEEK WITH A TROUGH AXIS THAT EXTENDS SOUTHWARD NEAR THE SOUTHEASTERN UNITED STATES. HIGH TEMPS ARE EXPECTED TO PEAK IN THE LOW TO MID 90S. OVERNIGHT LOWS WILL RANGE IN THE LOW TO MID 70S AWAY FROM THE COAST.
THE BROAD EAST COAST UPPER LEVEL TROUGH WILL REMAIN IN PLACE WITH A GENERALLY WEST TO WEST-NORTHWEST UPPER LEVEL FLOW. HIGHS WILL GENERALLY BE IN THE LOWER TO MID 90S WITH LESS CLOUD COVERAGE AND LATER ONSET OF CONVECTION.
AS CLOUD COVER WILL KEEP THE AREA COOLER THROUGH THE MORNING. AND WILL HOLD OFF ON VCTS UNTIL AFTER 21Z WITH AN UPPER-LEVEL TROUGH STILL NEARBY. THE GENERAL TROUGHINESS IN THE EASTERN PART OF THE COUNTRY WILL HELP KEEP TEMPERATURES FROM GETTING TOO OUT OF HAND HOT.
423 PM CDT TUE JUN 30 2015 AN UPPER TROUGH MOVING SOUTHWARD ACROSS THE SERN CONUS HAS INTERACTED WITH THE SEA BREEZE TODAY RESULTING IN WIDESPREAD CONVECTION OVER SRN LA. THE UPPER TROUGH WILL MOVE WELL AWAY FROM THE REGION FOR WEDNESDAY SO ANY CONVECTION SHOULD BE MUCH MORE ISOLATED.
239 PM EDT TUE JUN 30 2015 LOW PRESSURE WILL SLIDE EASTWARD OVER THE EASTERN GREAT LAKES TODAY. A COLD FRONT WILL SLIDE SOUTHEAST INTO THE MID ATLANTIC ON WEDNESDAY.
THE WIDESPREAD ACTIVITY IS BEING FORCED BY A MID LEVEL WARM FRONT AND WILL CONTINUE EAST AND NORTH AS THE MORNING PROGRESSES. AN H5 TROF OVER THE GREAT LAKES WILL BE THE MAIN WEATHER PLAYER THROUGH MID WEEK. AHEAD OF THIS TROF A SOUTHWEST FLOW AND STREAM OF UPPER LEVEL DISTURBANCES, EXTENDING FORM THE DEEP SOUTH THROUGH PA WILL BEGIN TO MOVE INTO OUR AREA. THE H5 TROF MENTIONED ABOVE MOVES THROUGH ALONG WITH A SURFACE COLD FRONT WEDNESDAY.
314 PM CDT TUE JUN 30 2015 RATHER ACTIVE SEABREEZE THIS AFTN GIVEN THE ADDITION OF OUTFLOWS AND SUCH FROM THE STORMS MOVING UP FROM THE LOWER TX COAST (MOST- LY) AND FROM NORTH TX (TO A LESSER DEGREE). MODELS TRYING TO DRY THINGS OUT ACROSS SE TX THURS/FRI AS THE UP- PER RIDGE IS PROGGED TO BRIEFLY EXTEND DOWN FROM THE NW AND PWAT NUMBERS LOWER A BIT. OTHERWISE THE RETREAT OF THE UPPER RIDGE AND ANOTHER SURGE OF GULF MOISTURE ON SAT/SUN WILL HELP TO INCREASE POPS ONCE AGAIN. STORM AND SHOWER ACTIVITY WILL BLOSSOM ONCE AGAIN IN SUBSEQUENT DAYS AS DISTURBANCES ORIGINATING FROM THE SOUTHERN GULF/BAY OF CAMPECHE TRAVEL NORTHWARD AROUND THE WESTERN PERIPHERY OF CENTRAL GULF-CENTERED SURFACE RIDGING.
151 PM MDT TUE JUN 30 2015 STRONG HIGH PRESSURE ALOFT OVER UTAH WILL BE PUSHED SLIGHTLY SOUTHWEST AS A COUPLE DISTURBANCES MOVE SOUTHEAST ALONG AND LEE OF THE NORTHERN ROCKIES THROUGH WEDNESDAY. TEMPERATURES ARE CURRENTLY 4 TO 6 DEGREES WARMER THAN THEY WERE YESTERDAY AT THIS TIME. HOWEVER WARMER AIR ALOFT. HIGH CLOUDS AND SOME WESTERLY DOWNSLOPE FLOW FROM THE HIGH TERRAIN WILL BRING WARMER OVERNIGHT TEMPERATURES TONIGHT COMPARED TO LAST NIGHT. MODELS ARE DEPICTING BOTH A THETA E RIDGE OVER THE PLAINS AS WELL AS SOME CONVECTIVE ACTIVITY PAST MIDNIGHT. EXPECT COOLER TEMPERATURES IN THE POST FRONTAL AIRMASS.
158 PM EDT TUE JUN 30 2015 LOW PRESSURE AT THE SURFACE AND ALOFT OVER THE GREAT LAKES WILL SHIFT TO THE EAST ON WEDNESDAY.
NORTH TEXAS WILL REMAIN ON THE EASTERN PERIPHERY OF A STRONG UPPER LEVEL RIDGE AND KEEP NORTHERLY FLOW ACROSS THE REGION.
AN UPPER LEVEL RIDGE IS STILL OVER THE WESTERN HALF OF THE CONUS WITH AN UPPER TROUGH OVER THE EAST. THE CWA IS UNDER THE EASTERN EDGE OF THE RIDGE PUTTING THE AREA UNDER EASTERLY TO NORTHEASTERLY FLOW ALOFT.
UPPER TROUGH IN PLACE OVER THE REGION WITH THE AIR MASS BECOMING AT LEAST MODERATELY UNSTABLE THIS AFTERNOON.
1227 PM MDT TUE JUN 30 2015 THE UPPER RIDGE IN PLACE OVER THE INTERMOUNTAIN REGION AND ROCKIES FLATTENS SOMEWHAT AS THE SHORT WAVE TROUGH TOPPING THE RIDGE TODAY MOVES EAST OF THE ROCKIES AND THROUGH THE NORTHERN AND CENTRAL HIGH PLAINS REGION OVERNIGHT WITH NORTHWEST FLOW PERSISTING OVER THE FORECAST AREA THROUGH WEDNESDAY. THE SURFACE LEE TROUGH DEEPENING ALONG THE FRONT RANGE MOVES EAST ACROSS THE FORECAST AREA WITH A COLD FRONT MOVING SOUTH THROUGH THE AREA BETWEEN 06Z-12Z. HIGH TEMPERATURES WILL BE ABOUT 5 DEGREES COOLER ON WEDNESDAY THAN ON TUESDAY.
641 PM EDT TUE JUN 30 2015 LOW PRESSURE WILL TRACK WEST OF MAINE WEDNESDAY.
CURRENT SITUATION AND ANALYSIS -- THE LOCAL ATMOSPHERE REMAINS DOMINATED BY A DEEP LAYER MEAN ANTICYCLONE CENTERED OVER SOUTHERN MEXICO. WITH RIDGING NORTHEASTWARD OVER THE FLORIDA PENINSULA. A WEAKENING HIGH PRESSURE AREA WILL EXTEND ACROSS CENTRAL FLORIDA OVERNIGHT.
727 PM EDT TUE APR 12 2016 VFR CONDITIONS WILL PREVAIL THROUGHOUT THE FORECAST PERIOD AS AN AREA OF HIGH PRESSURE CONTINUES TO DOMINATE THE WEATHER ACROSS SOUTH FLORIDA.
The low clouds will break up by mid afternoon Wednesday, with VFR conditions returning. Warm moist air, moving over cooler air near the surface, will continue to produce mainly showers tonight. Thus, we anticipate warmer temperatures tomorrow, with highs generally in the lower 70s.
A COLD FRONT WILL SLOWLY CROSS THE AREA THIS EVENING.
/issued 202 PM CDT TUE APR 12 2016/ Upper level low pressure area across Arizona/New Mexico will move east across the Texas Panhandle overnight. Showers and thunderstorms will continue to develop across southeast New Mexico and west Texas this evening ahead of this system with the best chance across the Permian Basin furthest north in the cooler air where the best lift and moisture will reside.
807 PM EDT TUE APR 12 2016 12Z RAOBS/LATEST RAP ANALYSIS AND WV IMAGERY SHOWS NW FLOW ALF BTWN UP RDG OVER THE ROCKIES AND PERSISTENT UPR TROF OVER ERN NAMERICA. SC THAT PREVAILED ACRS THE CWA EARLIER IS BREAKING UP W-E AND GIVING WAY TO MOSUNNY SKIES DESPITE SOME LINGERING H85 THERMAL TROFFING. EXPECT THE LOWEST MIN TEMPS TNGT OVER THE E. AS A COLD FRONT DRIFTS SLOWLY INTO THE UPPER LAKES LATE IN THE WEEKEND.
HIGH PRESSURE INFLUENCES ESPECIALLY ALOFT WILL BECOME MORE ENHANCED OVER THE MID STATE THIS WEEKEND. LOWS THRU THE FORECAST PERIOD SHOULD GENERALLY REMAIN IN THE LOWER 50S.
/ISSUED 346 PM EDT TUE APR 12 2016/ SHORT WAVE AND ASSOCIATED COLD FRONT WORKING THEIR WAY ACROSS THE REGION AND RAIN CHANCES SHOULD BE WINDING DOWN FOR ABOUT 24 HOURS BEFORE THE NEXT SYSTEM BEGINS IMPACTING THE FORECAST AREA. WEAK UPPER RIDGING TONIGHT QUICKLY SLIPS EAST. HIGH PRESSURE WILL WEDGE DOWN THE EASTERN SIDE OF THE FORECAST AREA.
/ISSUED 839 PM EDT TUE APR 12 2016/ SHORT WAVE AND ASSOCIATED COLD FRONT WORKING THEIR WAY ACROSS THE REGION AND RAIN CHANCES SHOULD BE WINDING DOWN FOR ABOUT 24 HOURS BEFORE THE NEXT SYSTEM BEGINS IMPACTING THE FORECAST AREA. WEAK UPPER RIDGING TONIGHT QUICKLY SLIPS EAST. HIGH PRESSURE WILL WEDGE DOWN THE EASTERN SIDE OF THE FORECAST AREA.
1048 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION THROUGH THE END OF THE WEEK. THIS WILL RESULT IN A COLD NIGHT FOR THE RIDGE VALLEY REGION. OVER THE LOWER SUSQ VALLEY WHERE THE GROWING SEASON HAS OFFICIALLY BEGUN. AREAS OF FROST LOOK LIKELY AS TEMPS BOTTOM OUT NEAR FREEZING. ISOLATED AREAS MAY HIT FREEZING DOWN THERE. HIGH PRESSURE TO OUR NORTH WILL KEEP US DRY. HOWEVER A WEAK MID LEVEL TROUGH IS FORECAST TO DROP DOWN OUT OF THE GR LAKES WHICH MAY BRING MORE IN THE WAY OF MID AND HIGH CLOUDS THAN CURRENTLY INDICATED IN THE MODEL OUTPUT.
734 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION WEDNESDAY AND TAKE CHARGE OF OUR WEATHER THROUGH THE WEEKEND. A WEAK WAVE ALOFT WILL BRING SOME MID LEVEL MOISTURE AND PASSING CLOUDS FOR AN INTERVAL OF CLOUDS AND SUN TYPE OF DAY WITH TEMPERATURES ONLY GRADUALLY WARMING ABOVE TODAY'S READINGS AS WE REMAIN IN A SLIGHT LOW LEVEL THERMAL TROF. STACKED HIGH PRESSURE BECOMES SOLIDLY ESTABLISHED WITH THICKNESS VALUES TRENDING UPWARD DURING THIS PERIOD AS WE REMAIN ON THE GOOD SIDE OF THE OMEGA BLOCKING SITUATION.
SO DID LOWER LOWS A FEW CLOSER TO SOME OF THE COOLER GUIDANCE.
Adjusted low temperatures for tonight down a bit across the area that is clearing and raised the low temperature at Tatum a few degrees since it is expected to remain cloudy and not cool much. /issued 202 PM CDT TUE APR 12 2016/ Upper level low pressure area across Arizona/New Mexico will move east across the Texas Panhandle overnight. Showers and thunderstorms will continue to develop across southeast New Mexico and west Texas this evening ahead of this system with the best chance across the Permian Basin furthest north in the cooler air where the best lift and moisture will reside.
/ISSUED 319 PM CDT TUE APR 12 2016/ HIGH PRESSURE OVER THE MID SOUTH WILL KEEP DRY WEATHER CONDITIONS IN PLACE TONIGHT. AN UPPER LEVEL LOW PRESSURE SYSTEM NOW OVER SOUTHERN NEW MEXICO WILL LIFT NORTHEAST OVER THE NEXT COUPLE OF DAYS. TEMPERATURES SHOULD BE A FEW DEGREES WARMER ON WEDNESDAY UNDER INCREASING LOW LEVEL WARM ADVECTION. THE UPPER LEVEL LOW WILL BECOME CUT OFF FROM THE MAIN WESTERLIES AND LINGER ACROSS THE MID SOUTH THROUGH THE END OF THE WEEK.
1107 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD TOWARD THE CANADIAN MARITIMES INTO MID WEEK. THE HIGH WILL CENTER INTO THE CANADIAN MARITIMES INTO MIDWEEK.
WITH THE HIGHER RAINFALL ALONG AND SOUTH OF THE I-10 CORRIDOR FOR WED. /ISSUED 336 PM CDT TUE APR 12 2016/ A WEAK COLD FRONT IS LOCATED VERY NEAR THE COAST OF UPPER SOUTHEAST TEXAS AND SOUTHERN LOUISIANA THIS AFTERNOON. WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL LOW OVER THE SOUTHWEST U. AS THE HIGH MOISTURE CONTENT.
1004 PM EDT TUE APR 12 2016 A COLD FRONT WILL PUSH THROUGH THE FORECAST AREA TONIGHT.
709 PM EDT TUE APR 12 2016 HIGH PRESSURE IS EXPECTED TO BRING DRY WEATHER AND A GRADUAL WARMING TREND THROUGH THE WEEKEND. UNDERCUT OVERNIGHT TEMPERATURE GUIDANCE WITH WINDS ON THE LIGHT SIDE AS HIGH PRESSURE MOVES ACROSS THE EASTERN GREAT LAKES. SOME HIGH CLOUDS WILL MOVE INTO THE REGION TOMORROW WITH AN UPPER LEVEL TROUGH. HIGHS ON WEDNESDAY WILL BE 5-10 DEGREES WARMER THAN TUESDAY. ALTHOUGH THESE VALUES WILL STILL BE SEVERAL DEGREES COOLER THAN NORMAL. WEAK GENERAL MID-LEVEL TROUGHING WILL HAVE ONE LAST REINFORCING SHORT WAVE TROUGH SLIDE DOWN THE BACK SIDE OF THE LONG WAVE TROUGH WEDNESDAY EVENING.
724 PM EDT TUE APR 12 2016 COLD FRONT EXITS THIS MORNING. HIGH PRESSURE CENTERED TO OUR NORTH AND NORTHEAST. RIDGING CONTINUES TO BUILD OVER THE REGION TONIGHT. TEMPERATURES ARE NOW FORECASTED TO BE AT OR SLIGHTLY ABOVE FREEZING IN THESE AREAS SO HAVE DECIDED TO ISSUE A FROST ADVISORY IN THESE LOCATIONS INSTEAD OF A FREEZE WARNING. AS BELOW FREEZING TEMPS STILL LOOK LIKE THEY WILL BE WIDESPREAD IN THOSE AREAS. HIGH PRESSURE TO THE NORTHEAST WILL PROVIDE DRY WEATHER AND MOSTLY CLEAR SKIES THROUGH THE FORECAST PERIOD.
747 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION THROUGH THE END OF THE WEEK. A BLUSTERY-COOL AND DRY AFTERNOON IS IN PROGRESS AS HIGH PRESSURE MOVES IN FROM THE GR LAKES. LEADING TO A COLD NIGHT FOR THE RIDGE VALLEY REGION. OVER THE LOWER SUSQ VALLEY WHERE THE GROWING SEASON HAS OFFICIALLY BEGUN. AREAS OF FROST LOOK LIKELY AS TEMPS BOTTOM OUT NEAR FREEZING. HIGH PRESSURE TO OUR NORTH WILL KEEP US DRY. HOWEVER A WEAK MID LEVEL TROUGH IS FORECAST TO DROP DOWN OUT OF THE GR LAKES WHICH MAY BRING MORE IN THE WAY OF MID AND HIGH CLOUDS THAN CURRENTLY INDICATED IN THE MODEL OUTPUT.
942 PM EDT TUE APR 12 2016 HIGH PRESSURE AND A DRY AIRMASS WILL SETTLE IN ACROSS THE GREAT LAKES AND OHIO VALLEY. DRY WEATHER WILL PERSIST THROUGH THE END OF THE WEEK AS THE HIGH TRAVELS SLOWLY EAST. A WARMING TREND WILL OCCUR THROUGH THE WEEKEND AS THE HIGH PRESSURE PERMITS A GRADUAL INCREASE EACH DAY. LOWS TONIGHT SHOULD RANGE FROM THE UPPER 20S NORTH TO THE LOW TO MID 30S IN THE SOUTH. THE HIGH PRESSURE WILL BE IN PLAY THROUGH THE FORECAST AND EACH SUCCESSIVE NIGHT AND DAYTIME PERIOD WILL SEE A RISE IN TEMPERATURES AS THEY BUILD ON EACH OTHER.
A WEAK FRONTAL TROUGH WILL BE MOVING INTO NORTH FLORIDA. WEAK FRONTAL TROUGH SHOULD SETTLE INTO THE CENTRAL PENINSULA. RATHER LIGHT PRESSURE GRADIENT OVERNIGHT WITH LOW LEVEL RIDGE IN THE VICINITY. A WEAK FRONTAL TROUGH DROPPING INTO THE NORTHERN WATERS ON WED WILL CONTINUE LIGHT WINDS EXCEPT POSSIBLY BECOMING NORTHERLY 10 KNOTS NORTH OF CAPE CANAVERAL.
807 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION THROUGH THE END OF THE WEEK. A BLUSTERY-COOL AND DRY AFTERNOON IS IN PROGRESS AS HIGH PRESSURE MOVES IN FROM THE GR LAKES. LEADING TO A COLD NIGHT FOR THE RIDGE VALLEY REGION. OVER THE LOWER SUSQ VALLEY WHERE THE GROWING SEASON HAS OFFICIALLY BEGUN. AREAS OF FROST LOOK LIKELY AS TEMPS BOTTOM OUT NEAR FREEZING. HIGH PRESSURE TO OUR NORTH WILL KEEP US DRY. HOWEVER A WEAK MID LEVEL TROUGH IS FORECAST TO DROP DOWN OUT OF THE GR LAKES WHICH MAY BRING MORE IN THE WAY OF MID AND HIGH CLOUDS THAN CURRENTLY INDICATED IN THE MODEL OUTPUT.
/ISSUED 626 PM CDT TUE APR 12 2016/ HIGH PRESSURE OVER THE MID SOUTH WILL KEEP DRY WEATHER CONDITIONS IN PLACE TONIGHT. AN UPPER LEVEL LOW PRESSURE SYSTEM NOW OVER SOUTHERN NEW MEXICO WILL LIFT NORTHEAST OVER THE NEXT COUPLE OF DAYS. TEMPERATURES SHOULD BE A FEW DEGREES WARMER ON WEDNESDAY UNDER INCREASING LOW LEVEL WARM ADVECTION. THE UPPER LEVEL LOW WILL BECOME CUT OFF FROM THE MAIN WESTERLIES AND LINGER ACROSS THE MID SOUTH THROUGH THE END OF THE WEEK.
936 PM EDT TUE APR 12 2016 HIGH PRESSURE CENTERED NEAR LAKE HURON WILL BUILD TO QUEBEC BY WEDNESDAY NIGHT. HIGH PRESSURE LOCATED NEAR LAKE HURON WILL CONTINUE A SLOW EASTWARD MOVEMENT THROUGH THE NIGHT. COOL NORTHEASTERLY WINDS WILL CONTINUE OFF LAKE ERIE AS HIGH PRESSURE SHIFTS TO THE EASTERN GREAT LAKES.
RIDGING ALOFT IS STARTING TO BUILD WITH AN UPPER LOW BECOMING "TRAPPED" OVER THE OK/AR REGION.
/ISSUED 1005 PM CDT TUE APR 12 2016/ UPPER TROUGH CONTINUES TO WORK EWD OVER W TX WITH INCREASING LIFT OVER MUCH OF OUR REGION. EXPECT AN INCREASE IN CONVECTION COVERAGE LATER TONIGHT THROUGH EARLY WEDNESDAY AS THE UPPER TROUGH ADVANCES EAST ACROSS TX.
SOMEWHAT FAMILIAR LARGE SCALE PATTERN ON THE H5 HAND ANALYSIS AT 12Z WITH RIDGING ALONG THE WEST COAST OF NOAM AND TROUGHING IN THE EAST. THE WEAK UPPER LOW SNEAKING UNDER THE WESTERN RIDGE IS MOVING OVER THE SOUTHERN ROCKIES THIS AFTERNOON. WEAK ASCENT NORTH OF THIS SYSTEM IS COMBINING WITH AFTERNOON INSTABILITY TO ENHANCE RIDGETOP SHOWER AND THUNDERSTORM ACTIVITY. STEEP LAPSE IN PLACE HOWEVER WITH WARMING MID LAYER AND THIS SHOULD KEEP SOME LATE AFTERNOON SHOWERS AND ISOLATED STORMS ON THE RIDGETOPS.
1012 PM EDT TUE APR 12 2016 A COLD FRONT WILL PUSH EAST OF THE AREA TONIGHT.
1226 AM EDT WED APR 13 2016 12Z RAOBS/LATEST RAP ANALYSIS AND WV IMAGERY SHOWS NW FLOW ALF BTWN UP RDG OVER THE ROCKIES AND PERSISTENT UPR TROF OVER ERN NAMERICA. SC THAT PREVAILED ACRS THE CWA EARLIER IS BREAKING UP W-E AND GIVING WAY TO MOSUNNY SKIES DESPITE SOME LINGERING H85 THERMAL TROFFING. EXPECT THE LOWEST MIN TEMPS TNGT OVER THE E. AS A COLD FRONT DRIFTS SLOWLY INTO THE UPPER LAKES LATE IN THE WEEKEND.
WITH A MOSTLY CLEAR SKY AS HIGH PRESSURE BUILDS IN. CHATTANOOGA AIRPORT, TN 47 70 51 68 / 0 10 20 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 42 68 49 70 / 0 0 10 10 OAK RIDGE, TN 42 69 50 71 / 0 0 10 10 TRI CITIES AIRPORT, TN 35 67 40 69 / 0 0 0 10 TN.
1013 PM EDT TUE APR 12 2016 A COLD FRONT WILL MOVE THROUGH THE REGION THIS EVENING. HIGH PRESSURE WILL BUILD IN ON WEDNESDAY AND REMAIN IN CONTROL THROUGH THE WEEKEND. PRESENT WIND FIELD AND A BAND OF SCATTERED SHOWERS SHOWS COLD FRONT EXTENDS FROM OREGON INLET TO WASHINGTON TO GREENVILLE. ESPECIALLY ALONG THE COAST WITH A TIGHT PRESSURE GRADIENT BETWEEN HIGH PRESSURE CENTERED TO OUR NORTHWEST AND AN AREA OF LOW PRESSURE WELL OFF THE COAST.
A COLD FRONT WILL SLOWLY SOUTH THROUGH THE REGION OVERNIGHT.
929 PM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION WEDNESDAY AND TAKE CHARGE OF OUR WEATHER THROUGH THE WEEKEND. A WEAK SECONDARY TROF HAS RESULTED IN A FAIR AMOUNT OF CLOUD COVER ACROSS CENTRAL NEW YORK THIS EVENING ALONG WITH A FEW SPRINKLES/FLURRIES. A WEAK WAVE ALOFT WILL BRING SOME MID LEVEL MOISTURE AND PASSING CLOUDS FOR AN INTERVAL OF CLOUDS AND SUN TYPE OF DAY WITH TEMPERATURES ONLY GRADUALLY WARMING ABOVE TODAY'S READINGS AS WE REMAIN IN A SLIGHT LOW LEVEL THERMAL TROF. STACKED HIGH PRESSURE BECOMES SOLIDLY ESTABLISHED WITH THICKNESS VALUES TRENDING UPWARD DURING THIS PERIOD AS WE REMAIN ON THE GOOD SIDE OF THE OMEGA BLOCKING SITUATION.
713 PM EDT TUE APR 12 2016 HIGH PRESSURE AND A DRY AIRMASS WILL SETTLE IN ACROSS THE GREAT LAKES AND OHIO VALLEY. DRY WEATHER WILL PERSIST THROUGH THE END OF THE WEEK AS THE HIGH TRAVELS SLOWLY EAST. A WARMING TREND WILL OCCUR THROUGH THE WEEKEND AS THE HIGH PRESSURE PERMITS A GRADUAL INCREASE EACH DAY. AND SOME COOLER SPOTS MAY EXPERIENCE ANOTHER NIGHT OF FREEZING TEMPERATURES WITH THE SUBSEQUENT THREATS TO VEGETATION. THE HIGH PRESSURE WILL BE IN PLAY THROUGH THE FORECAST AND EACH SUCCESSIVE NIGHT AND DAYTIME PERIOD WILL SEE A RISE IN TEMPERATURES AS THEY BUILD ON EACH OTHER.
Warm moist air, moving over cooler air near the surface, will continue to produce mainly showers tonight. Thus, we anticipate warmer temperatures tomorrow, with highs generally in the lower 70s.
1147 PM CDT TUE APR 12 2016 FOR 06Z TAFS /ISSUED 845 PM CDT TUE APR 12 2016/ AT THE SFC A RIDGE EXTENDS FROM THE GREAT LAKES THRU THE SRN MS RIVER VALLEY. WHILE A WEAK UPPER RIDGE COVERED MUCH OF THE SERN US.