Aikyam-Lab/Synoptic-Bench huggingface dataset:
253 AM EDT THU MAR 19 2015 HIGH PRESSURE WILL CONTINUE TO PROVIDE FAIR WEATHER ACROSS OUR AREA THROUGH THURSDAY. QUIET SHORT TERM PERIOD AS HIGH PRESSURE SLIDES EAST ACROSS THE REGION THROUGH THURSDAY. THURSDAY WILL BE SLIGHTLY WARMER THAN TODAY ACROSS THE REGION. A NICE COMPROMISE BETWEEN THE WARMER MAV AND COOLER MET/EC MOS. AFTER SOME LINGERING SHOWERS/SPRINKLES SE FRIDAY MORNING DRY CONDITIONS WILL PREVAIL WITH A NICE DAY ON TAP FRIDAY AS HIGHS CLIMB INTO THE LOW TO MID 50S.
557 AM EDT THU MAR 19 2015 HIGH PRESSURE OVER THE GREAT LAKES THIS MORNING WILL MOVE EAST TO NEW ENGLAND BY TONIGHT. A WEAK LOW PRESSURE SYSTEM IS EXPECTED TO CAUSING A MIXTURE OF RAIN AND SNOW. WITH LOWS TONIGHT IN THE LOWER TO MIDDLE 30S. WK UPR RIDGE OVER IA/MN THIS MORNING WILL MOVE RAPIDLY EAST ACROSS OUR AREA TODAY PROVIDING FAIR WX. THIS COULD RESULT IN SOME LIGHT FREEZING RAIN ACROSS NE PORTION OF THE AREA. TEMPS WILL RECOVER NICELY AND DROP LITTLE INTO FRIDAY NIGHT AS LOW LEVEL THERMAL RIDGE FOLDS IN.
KEPT THE LOWEST VALUES FARTHER E. NAM SHOWS A 500 MB TROUGH ACROSS SOUTH CENTRAL CANADA 12Z FRI. THIS TROUGH DIGS SOUTHEAST FRI NIGHT AND SAT AND ALLOWS COLDER AIR BACK INTO THE AREA. ECMWF AND GFS SHOW A BROAD 500 MB TROUGH OVER THE NORTHEAST U. HIGH PRESSURE ACROSS LAKE SUPERIOR WILL EXIT E ACROSS THE LOWER GREAT LAKES THURSDAY. THIS WILL BRING A TROUGH ACROSS LAKE SUPERIOR ON FRIDAY.
PART OF DEEP UPPER TROUGHING STILL IN PLACE ACROSS EASTERN CANADA. STRONG HIGH PRESSURE IS SITTING ESSENTIALLY RIGHT ON TOP OF THE STATE THIS MORNING. MID LEVEL SHORT WAVE IS OVER NORTH DAKOTA WITH EXTENSIVE WARM ADVECTION FORCED CLOUD COVER STRETCHING FROM THE NRN PLAINS THROUGH THE LOWER LAKES AND OHIO VALLEY. BUT MORE EXTENSIVE PRECIP IS OCCURRING ACROSS THE LOWER AND MID MISSISSIPPI RIVER VALLEY AHEAD OF A LOW AMPLITUDE WAVE MOVING THROUGH THAT REGION. HIGH PRESSURE NOW OVER THE REGION WILL RETREAT INTO THE EASTERN LAKES ALLOWING STRONGER SW FLOW WARM ADVECTION TO DEVELOP. RAIN SHOWERS LIKELY MIXING WITH AND POSSIBLY ENDING AS SNOW SHOWERS FRIDAY NIGHT FROM THE COMBINATION OF AN ALBERTA CLIPPER MOVING ACROSS THE REGION AND AN APPROACHING ARCTIC COLD FRONT.
351 AM CDT THU MAR 19 2015 COLD FRONT EXPECTED TO PASS THROUGH FORECAST AREA TODAY.
STILL EXPECT ALMOST ALL RAIN TO CONTINUE IN THE IMMEDIATE DENVER METRO AREA BUT STILL SOME POTENTIAL FOR A FEW WET SNOWFLAKES IN THE 6-10 AM TIME FRAME ONLY IF COOLER AND SLIGHTLY DRIER AIR ARRIVES AS SOME MODELS SUGGEST. NOT SURE AT THIS POINT HOWEVER IF HEAVIER PRECIPITATION WILL BANK UP AGAINST THE HIGHEST TERRAIN AS MOST WILL LIKELY BE WRUNG OUT OVER THE FOOTHILLS.
AN AREA OF LOW PRESSURE WILL PASS BY TO THE SOUTH OF THE AREA TONIGHT INTO THURSDAY RESULTING IN SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ACROSS PORTIONS OF THE MOJAVE DESERT AND SOUTHERN GREAT BASIN. DRIER AND SUNNIER CONDITIONS ARE EXPECTED IN THE WAKE OF THIS LOW ON FRIDAY.
TODAY AND TONIGHT HIGH PRESSURE OVER THE CENTRAL GREAT LAKES WILL SLIDE OFF TO THE EAST DURING THE DAYTIME HOURS. ALLOWING A SHALLOW BACK DOOR COLD FRONT TO SLIDE NORTHEAST THROUGH SOUTHEAST MICHIGAN TODAY. THIS COLD FRONT WILL BRING A SURGE OF COLDER AIR. THIS COLD FRONT POSES AN ISSUE WITH HIGH TEMPERATURES TODAY AS MOS GUIDANCE DIFFERS A GOOD 10 DEGREES BETWEEN THE WARM MAV/ECS GUIDANCE WHICH SIDES WITH THE CURRENT FORECAST AND THE MUCH COOLER MET MOS GUIDANCE. ATTENTION THEN TURNS TO A LOW PRESSURE SYSTEM TRACKING THROUGH THE OHIO VALLEY DURING THE OVERNIGHT HOURS. THERE IS SOME CONCERN FOR FREEZING RAIN WITH LOW LEVEL DRY AIR. THEREFORE WILL CONTINUE TO LEAVE FREEZING RAIN OUT OF THE MAIN FORECAST WITH THIS ISSUANCE.
250 AM CDT THU MAR 19 2015 AREAS OF LIGHT DRIZZLE/FOG WILL CONTINUE THIS MORNING IN ADVANCE OF UPPER LEVEL LOW.
LOW PRESSURE HAS MOVED EAST ALONG THE FRONT INTO MISSISSIPPI. THE FRONT WILL MOVE NORTH INTO ARKANSAS AS A WARM FRONT THURSDAY EVENING AND AS LOW PRESSURE MOVES ALONG THE FRONT.
333 AM CDT THU MAR 19 2015 A COUPLE OF WEAK SHORT WAVES WILL SCOOT EAST ACROSS THE LOWER MS VALLEY DURING THE NEXT 24 HOURS.
S ridge of high pressure. Cooler Friday and over the weekend as a weak system clips the north state with a chance of precip north of Sacramento Friday night. Upper level high pressure ridge axis over the north state this morning for fair skies over the forecast area.
400 AM EDT THU MAR 19 2015 HIGH PRESSURE OVER THE GREAT LAKES THIS MORNING WILL MOVE EAST TO NEW ENGLAND BY TONIGHT. A WEAK LOW PRESSURE SYSTEM IS EXPECTED TO CAUSING A MIXTURE OF RAIN AND SNOW. WITH LOWS TONIGHT IN THE LOWER TO MIDDLE 30S. WK UPR RIDGE OVER IA/MN THIS MORNING WILL MOVE RAPIDLY EAST ACROSS OUR AREA TODAY PROVIDING FAIR WX. THIS COULD RESULT IN SOME LIGHT FREEZING RAIN ACROSS NE PORTION OF THE AREA. TEMPS WILL RECOVER NICELY AND DROP LITTLE INTO FRIDAY NIGHT AS LOW LEVEL THERMAL RIDGE FOLDS IN.
138 AM EDT THU MAR 19 2015 HIGH PRESSURE WILL PROVIDE DRY AND COOL CONDITIONS ACROSS THE REGION AGAIN TONIGHT. AN AREA OF LOW PRESSURE WILL MOVE SOUTH OF THE OHIO VALLEY ON THURSDAY AND INTO FRIDAY.
FORCING A DEVELOPING COLD FRONT TO BEGIN TO PUSH INTO NRN OK. WITH THE STALLED H500 TROUGH OVER THE SWRN U. THE SRN PLAINS REMAIN POSITIONED UNDER AN ACTIVE SYNOPTIC PATTERN AS THE SWRN TROUGH FINALLY BEGINS TO MOVE EAST. THIS WILL KEEP LOW PRECIP CHANCES NEAR DAILY ACROSS SRN OK/WRN N TX THROUGH THE WEEKEND AS THE TROUGH FINALLY LIFTS ACROSS TX ON SUN. LOW PRECIP CHANCES WILL EXIST AT VARIOUS TIMES THROUGH THE WEEK AS WEAK RIDGING/NEAR ZONAL FLOW DEVELOPS WITH WEAK H500 SHORT WAVES TRAVERSING THE FLOW. WED-FRI AS A COLD FRONT MOVES S/SE ACROSS THE REGION IN ASSOCIATION WITH LARGE SCALE RIDGING ACROSS CANADA AND THE NRN U.
An upper level trough to our west will begin to slowly move east today. This trough along with good daytime heating will help fuel a few thunderstorms by this afternoon. The best chance will be across the higher terrain of W TX where deep layer shear is more than adequate to see some organized convection. Strong lift then overspreads the area Friday as the upper trough gets closer.
AN AMPLIFYING UPPER RIDGE OVER THE INTERMOUNTAIN NW WILL PUSH TEMPERATURES WELL ABOVE NORMAL BY FRIDAY. BY FRIDAY THESE FEATURES SHIFT INTO EASTERN IDAHO AS AN UPPER TROUGH APPROACHES THE PAC NW COAST.
335 AM EDT THU MAR 19 2015 HIGH PRESSURE WILL CONTINUE OVER THE CAROLINAS THROUGH FRIDAY. CHANCES OF RAIN WILL INCREASE TODAY AS A TROUGH OF LOW PRESSURE DEVELOPS OFF THE COAST. LOW PRESSURE FROM THE GULF COAST REGION WILL LIFT NORTHEAST AND TRACK ALONG THE COAST ON FRIDAY.
330 AM MST THU MAR 192015 A LOW PRESSURE SYSTEM MOVING ACROSS SOUTHERN ARIZONA WILL BRING SHOWERS AND ISOLATED THUNDERSTORMS TODAY.
PRECIP WILL MOVE OUT BY FRIDAY AFTERNOON WITH A WARMER DAY IN THE 50S TO AROUND 60 EXPECTED.
A WEAK SHORT WAVE TROUGH WILL SHIFT SLOWLY EAST ACROSS THE SOUTHEASTERN U. WEAK LIFT AND SOME DRY AIR THAT MUST BE OVERCOME IN THE LOWER LEVELS ACROSS THE FORECAST LEADS TO HIGH PROBABILITY WITH LIGHT QPF.
SPLIT FLOW WITH A WRN USA RIDGE/ERN USA TROF IN THE NRN STREAM. A TROF OVER THE SW AND CONFLUENT FLOW OVER THE ERN USA. THIS TROF WILL WEAKEN FURTHER WITH ITS TAIL END MOVING IN TONIGHT. THE SRN STREAM TROF OVER TX WILL HAVE NO DIRECT IMPACT HERE EITHER. A WEAK SFC TROF WAS APPROACHING FROM THE NW AND WILL CROSS THE FCST AREA TODAY. BUT THE 850 MB THERMAL TROF DOES GET SCOURED WITH A THERMAL RIDGE COINCIDENT WITH THE SFC TROF. AHEAD OF THE APPROACHING TROF.
A TRANQUIL WEATHER PATTERN PREVAILS ACROSS SOUTH FL WITH HIGH PRESSURE IN CONTROL. /ISSUED 304 PM EDT WED MAR 18 2015/ QUIET WEATHER ACROSS THE CWA TODAY AS A COLD FRONT OVER CENTRAL FLORIDA HAS ALL BUT STALLED. AS THE FRONT SAGS TO THE SOUTH TONIGHT AND TOMORROW, THERE IS A WEAK LOW PRESSURE CENTER OVER SOUTH FLORIDA THAT WILL STRENGTHEN SLIGHTLY AS IT INTERACTS WITH THE FRONT. THIS LOW WILL SHIFT TO THE NORTHWEST AND BRING A SLIGHT CHANCE OF SHOWERS TO THE LAKE REGION TOMORROW. HOWEVER, THE LOW WILL BE QUICKLY MOVING TO THE NORTHEAST, AND WILL TAKE MOST OF THE PRECIPITATION WITH IT, KEEPING SOUTH FLORIDA MOSTLY DRY FOR THE BEGINNING OF THE WEEKEND.
I DECREASED THE LOW TEMPERATURES FOR TOMORROW MORNING IN MOST AREAS BY 2-5 DEGREES BASED ON DECREASING MOISTURE CONTENT IN AIR MASS TONIGHT AS SHOWN IN FORECAST SURFACE DEWPOINT TEMPERATURES DECREASING THROUGH TONIGHT. THE DRIER AIR MASS IS ASSOCIATED WITH SINKING AIR ALOFT ASSOCIATED WITH A RIDGE OF HIGH PRESSURE IN THE MID/UPPER LEVELS BUILDING OVER THE REGION. THE HIGH CLOUDS WILL SPREAD TO KPSC, KPDT AND KALW BY 10Z-12Z.
235 AM PDT THU MAR 19 2015 WEAK HIGH PRESSURE WILL BUILD OVER THE TODAY AND FRIDAY. COOLER AND BREEZY CONDITIONS ARE EXPECTED AS A COUPLE OF LOW PRESSURE SYSTEMS MOVE BY TO THE NORTH.
KEPT THE LOWEST VALUES FARTHER E. INCREASING 290K-295K ISENTROPIC LIFT AHEAD OF THE SFC- 850 MB TROUGH MAY SUPPORT SOME LIGHT PCPN OVER MAINLY WEST UPPER MICHIGAN. EXPECT TEMPS TO CLIMB ABOVE NORMAL WITH WSW FLOW BRINGING IN MILDER AIR AHEAD OF A COLD FRONT. HIGH PRES WILL BUILD OVER THE REGION WITH COLD AIR AND TEMPS REMAINING AT OR BELOW NORMAL WITH HIGHS IN THE UPPER 20S TO LOWER 30S SUN AND THE LOWER TO MID 30S MON. HIGH PRESSURE ACROSS LAKE SUPERIOR WILL EXIT E ACROSS THE LOWER GREAT LAKES THURSDAY. THIS WILL BRING A TROUGH ACROSS LAKE SUPERIOR ON FRIDAY.
HIGH PRESSURE ALOFT WILL LEAD TO DRY WEATHER AND ABOVE NORMAL TEMPERATURES ACROSS INTERIOR LOCATIONS THROUGH EARLY FRIDAY. HIGH PRESSURE WILL REMAIN IN PLACE OVER NORTHWEST CALIFORNIA THROUGH THURSDAY LEAVING DRY CONDITIONS AND GENERALLY SUNNY SKIES. A WEAKENING COLD FRONT WILL MOVE TOWARD THE NORTHWEST CALIFORNIA COAST ON FRIDAY BRINGING RAIN TO PRIMARILY HUMBOLDT AND DEL NORTE COUNTIES FRIDAY EVENING AND OVERNIGHT.
WITH THE HIGHEST CHANCES OVER THE INTERIOR AND OVER THE NORTHERN AND CENTRAL PARTS OF THE FORECAST AREA. SUBSIDENCE FROM THE UPPER/MID LEVEL RIDGE WILL LEAD TO CONTINUED ABOVE NORMAL TEMPERATURES WITH HIGHS GENERALLY IN THE 80S TODAY AND TOMORROW. AND LOWS IN THE LOW TO MID 60S. PATCHY FOG WILL BE POSSIBLE ONCE AGAIN TONIGHT THROUGH EARLY FRIDAY MORNING UNDER LIGHT WINDS AND DEW POINTS IN THE LOW TO MID 60S.
HIGH PRESSURE EXITING TO THE EAST WILL PROVIDE ONE MORE DRY DAY ACROSS THE CWA WITH A WARM AFTERNOON. THE RIDGE ALOFT PROVIDING THE DRY, WARM WEATHER WILL MOVE AWAY TONIGHT AND THIS WILL ALLOW AN UPPER LEVEL TROUGH AND ASSOCIATED SURFACE COLD FRONT OFFSHORE TO APPROACH THE COAST ON FRIDAY.
444 AM MDT THU MAR 19 2015 THE MAIN FEATURES OF INTEREST IN THE SHORT TERM ARE THE LOW PRESSURE SYSTEM OVER NORTHERN BAJA. ALSO OF INTEREST IS A 700 MB COLD FRONT ASSOCIATED WITH THE NORTHERN WAVE THAT DROPPED ACROSS THE NORTHERN HALF OF THE FORECAST AREA LAST EVENING AND EARLY THIS MORNING. HOWEVER SNOW LEVELS STILL ON THE HIGH SIDE AS TEMPERATURES REMAIN QUITE MILD EVEN ACROSS THE NORTH WHERE THE FRONT HAS ALREADY PASSED. THE TROUGH AXIS OF THE PHASED SYSTEMS WILL STRETCH FROM THE SOUTHWEST TO THE NORTHEAST. A SHORT WAVE TROUGH MOVING ASHORE OVER THE PACIFIC NORTHWEST FINALLY FORCES THE AXIS OF THE TROUGH EXTENDING FROM THE COLORADO PLAINS TO THE CUTOFF LOW OVER MEXICO TO THE EAST.
224 AM PDT THU MAR 19 2015 HIGH PRESSURE BUILDING OVER THE WEST WILL BRING WARM AND DRY CONDITIONS TODAY INTO FRIDAY.
WHILE TEMPS START COOLER THAN NORMAL. THE LOW LEVEL MOISTURE WILL STAY OVER THE AREA TODAY. AS THE UPPER RIDGE WILL GRADUALLY BUILD INTO THE AREA AND HELP TEMPS WARM TODAY.
Back near the surface, Canadian high pressure to our north has funneled very dry air into the Ohio Valley. Across the entire forecast area, the low levels should be well saturated by this afternoon and evening, so light rain or drizzle in low clouds is likely. Lows tonight won't stray too far from highs today, only dipping down into the low to mid 40s.
308 AM CDT THU MAR 19 2015 THE UPPER LOW THAT WE HAVE BEEN WATCHING MOVE NORTHEAST HAS WEAKENED WITH ONLY A WEAK WAVE SHOWING UP NOW IN WATER VAPOR IMAGERY AS OF 08Z. AS THE LOW APPROACHES FROM THE SW. CLOUDS SHOULD HOLD THROUGH THE DAY BUT IF BREAKS DO OCCUR TEMPS COULD BE A FEW DEG WARMER THAN FORECAST. ANOTHER WEAK 500-700 MB TROUGH STARTS TO DIP SOUTHEAST ON FRIDAY WHICH SHOULD USHER IN A WEAK COLD FRONT BY FRIDAY NIGHT.
/ISSUED 354 PM CDT FRI MAR 20 2015/ IMPRESSIVE PLUME OF UPPER SUBTROPICAL MOISTURE CONTINUED ACROSS MUCH OF WEST TX THIS AFTERNOON WELL AHEAD OF A SLOW-MOVING UPPER LOW STILL CHURNING OVER BAJA CA.
NEAR ZONAL FLOW PREVAILS ALOFT THIS EVENING BEHIND A WEAK COLD FRONT THAT MOVED THROUGH EARLIER TODAY. CURRENT INDICATIONS ARE THAT THE LOW-LEVEL DECK WILL DISSIPATE WITH BKN CI/LGT NE WINDS AND ABUNDANT SFC MOISTURE PROMOTING BR/FG DEVELOPMENT BEGINNING ARND 21/07Z.
NEAR ZONAL FLOW PREVAILS ALOFT THIS EVENING BEHIND A WEAK COLD FRONT THAT MOVED THROUGH EARLIER TODAY.
A WEAK COLD FRONT WILL SHIFT ACROSS THE STATE TONIGHT ENTERING THE FAR NORTHWEST AROUND 03Z THEN PUSHING THROUGH MOST OF CENTRAL IOWA BY SHORTLY AFTER 06Z AND THROUGH THE SOUTHEAST AROUND 12Z. TEMPS OVERNIGHT WILL ACTUALLY BE WARMER TONIGHT THAN LAST NIGHT DESPITE THE FRONTAL PASSAGE. PRIMARILY BECAUSE WE ARE ABOUT 20 DEGREES WARMER TODAY THAN WE WERE YESTERDAY AND TEMPS WILL NOT BE FALLING FAST TONIGHT DUE TO A LITTLE BETTER MIXING.
DRIER AIR CONTINUES TO PUSH IN FROM THE NORTHWEST AS RIDGING BUILD IN. THE BAJA LOW PUSHES ACROSS NORTHERN MEXICO TONIGHT AND INTO WEST TEXAS ON SATURDAY WHILE THE DRY RIDGE CONTINUES TO BUILD EASTWARD INTO ARIZONA. DRY AND WARM SPRING WEATHER CONTINUES THROUGH THE WEEKEND WITH HIGH TEMPERATURES RUNNING ABOUT 10 DEGREES WARMER THAN AVERAGE.
SURFACE ANALYSIS TONIGHT CONTINUES TO SHOW HIGH PRESSURE STRETCHED ACROSS THE EASTERN GULF OF MEXICO AND FLORIDA. HIGH PRESSURE REMAINS OVER THE EASTERN GULF OF MEXICO PRODUCING DRY CONDITIONS.
755 PM EDT FRI MAR 20 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL DROP SOUTH ACROSS THE AREA ON SATURDAY.
MID-UPPER LEVEL RIDGING ACROSS THE WESTERN CARIBBEAN HAS EXPANDED INTO THE SOUTHEASTERN UNITED STATES. HIGH PRESSURE SURVIVES FROM THE ARKLATEX INTO THE WESTERN ATLANTIC.
745 PM EDT FRI MAR 20 2015 HIGH PRESSURE WILL REMAIN IN CONTROL THROUGH THE END OF THE TAF PERIOD.
HIGH PRESSURE CONTINUES TO WORK ITS WAY INTO MIDDLE TENNESSEE WITH MVFR CIGS COVERING MUCH OF THE MID STATE (IFR ALONG THE CUMBERLAND PLATEAU). /ISSUED 323 PM CDT FRI MAR 20 2015/ TEMPERATURES ARE HOLDING IN THE LOW TO MID 50S ACROSS MIDDLE TENNESSEE AS CLOUD COVER LINGERS OVER THE AREA. EVEN THOUGH DEWPOINTS LOOK TO DECREASE OVERNIGHT AS THE HIGH BUILDS IN.
MODEL FORECAST OF 300 MB DEWPOINT DEPRESSION SUGGESTS THIS HIGH CLOUD COVER WILL LIKELY STICK AROUND THROUGH MUCH OF THE NIGHT. HIGH PRESSURE WORKS IN AND ACROSS THE TENNESSEE VALLEY AND OVERALL SUBSIDENCE/DRYING THROUGH THE COLUMN SHOULD WIN OUT.
CLOUD COVER CONTINUES TO THICKEN IN ADVANCE OF A WEAK SHORT WAVE TROUGH THAT WILL MOVE THROUGH TOMORROW. THE TROUGH WILL MOVE THROUGH EARLY IN THE DAY.
Have trended twd the cooler guidance tonight partially because of anticipating the clearing. While this may be a cold fnt, with nearly full insolation expected, tomorrow shud actually be warmer than today. Mdls also push the thermal ridge across the region on Sat. As the trof deepens across the Plains and the LLJ increases with what shud be an open Gulf, precip chances increase quickly Mon night and Tues, with TS becoming more probable as well. A weak cold front pushes thru the terminals Sat mrng backing the wind from SW to NE from mrng to aftn.
1000 PM PDT Fri Mar 20 2015 Cooler this weekend as a weak system clips the north state with a chance of precipitation well north of Sacramento through Saturday.
AN UPPER LOW REMAINS CUT OFF FROM THE FLOW AS IT SPINS NEAR BAJA CALIFORNIA. DOWNSTREAM RIDGING IS EVIDENT OVER THE GULF OF MEXICO. TEMPS WILL ONCE AGAIN BE WELL ABOVE NORMAL WITH MIN TEMPS GENERALLY IN THE LOWER TO MID 60S.
943 PM EDT FRI MAR 20 2015 A COLD FRONT OVER THE NORTHERN GREAT LAKES WILL DROP SOUTH ACROSS THE AREA ON SATURDAY.
1212 AM EDT SAT MAR 21 2015 AVIATION A COLD FRONT WILL PUSH THROUGH THE GREAT LAKES REGION TONIGHT.
CHATTANOOGA AIRPORT, TN 47 68 50 63 / 0 0 20 40 KNOXVILLE MCGHEE TYSON AIRPORT, TN 44 64 46 68 / 10 0 10 20 OAK RIDGE, TN 44 65 46 68 / 10 0 10 10 TRI CITIES AIRPORT, TN 41 63 42 64 / 10 0 10 20.
1043 PM EDT FRI MAR 20 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BE OVER CENTRAL PA TONIGHT AND EARLY SATURDAY.
THE EVENING MIAMI SOUNDING SHOWS THE LOW LEVELS HAVE DRIED SO NO SHOWERS ARE EXPECTED TONIGHT. /ISSUED 745 PM EDT FRI MAR 20 2015/ HIGH PRESSURE WILL REMAIN IN CONTROL THROUGH THE END OF THE TAF PERIOD.
AS THE OVERRUNNING PATTERN BECOMES MORE ESTABLISHED WITH APPROACH OF THE UPPER LOW. THE UPPER LOW PASSING OVERHEAD ENABLES MORE FOG AIDED VSBY RESTRICTIONS. LATE AFTERNOON SURFACE OBSERVATIONS AUGMENTED WITH RADAR DATA SHOW A COLD FRONT ALONG A BRACKETTVILLE TO BOERNE TO AUSTIN-BERGSTROM AIRPORT LINE. SHOWERS AND A FEW THUNDERSTORMS CONTINUE TO DEVELOP ALONG AND BEHIND THE COLD FRONT. WITH THE COLD FRONT MOVING SLOWLY SOUTHWARD THIS AFTERNOON AND EARLY EVENING. CONCERNS FOR HEAVY RAINFALL CONTINUE INTO SATURDAY AS THE UPPER LOW CURRENTLY OVER THE BAJA PENINSULA MOVES IN FROM THE WEST. AREAS GENERALLY ALONG AND EAST OF I-35 WOULD BE FAVORED FOR THE HIGHEST RAINFALL TOTALS. RAIN CHANCES WILL BEGIN TO DECREASE FROM WEST TO EAST SATURDAY NIGHT AS THE UPPER TROUGH AXIS BEGINS TO MOVE ACROSS THE REGION.
WEAK HIGH PRESSURE OVER THE SOUTHWEST WILL BRING WARM AND DRY WEATHER SATURDAY.
A WEAK WESTERLY FLOW ALOFT WILL BE OVER COLORADO AS A RIDGE OF HIGH PRESSURE MOVES OVER COLORADO. TEMPERATURES WILL CONTINUE TO MODIFY WELL ABOVE NORMAL WITH HIGHS IN THE LOWER TO MID 70S SATURDAY AFTN.
FRONT WILL REMAIN NEARLY STATIONARY THROUGH THE PERIOD WITH HIGH PRESSURE DOMINATING THE WEATHER OVER THE TERMINALS.
1137 PM EDT FRI MAR 20 2015 A WEAK RIDGE OF HIGH PRESSURE WILL BE OVER CENTRAL PA TONIGHT AND EARLY SATURDAY.
758 PM EDT FRI MAR 20 2015 AVIATION A COLD FRONT WILL PUSH THROUGH THE GREAT LAKES REGION TONIGHT.
529 PM MDT FRI MAR 20 2015 WEAK UPPER RIDGING WILL HOLD ACROSS THE REGION MOST OF THIS PERIOD KEEPING MILD AND MAINLY DRY WEATHER IN PLACE OVER THE CWA. WARMEST TEMPS WILL BE SATURDAY AS WEAK LEE TROUGHING OVER THE HIGH PLAINS SETS UP DOWNSLOPE FLOW.
Have trended twd the cooler guidance tonight partially because of anticipating the clearing. While this may be a cold fnt, with nearly full insolation expected, tomorrow shud actually be warmer than today. Mdls also push the thermal ridge across the region on Sat. As the trof deepens across the Plains and the LLJ increases with what shud be an open Gulf, precip chances increase quickly Mon night and Tues, with TS becoming more probable as well. Removed the high end MVFR fog with current thinking that the thick cirrus expected for the rest of the night will hold temps up enough so the cross over temp is not reached. Otherwise expect a slowly backing wind from mid mrng thru the aftn as a weak cold front slides thru.
LOW TEMPERATURES TONIGHT WILL RANGE FROM THE LOWER 50S NORTH TO THE LOWER 60S SOUTH.
1100 PM CDT FRI MAR 20 2015 DEEP LAYER MOISTURE CONTINUES TO SURGE INTO THE REGION LATE THIS EVENING AS THE UPPER LOW SLOWLY MIGRATES EAST FROM BAJA.
/ISSUED 458 PM CDT FRI MAR 20 2015/ LATEST UPPER AIR ANALYSIS/WATER VAPOR SATELLITE IMAGERY SHOWED AN UPPER LOW OVER THE BAJA. WITH DOWNSTREAM RIDGING OVER THE YUCATAN CHANNEL. WHILE LOWER LEVEL RIDGING OVER THE NORTH CENTRAL/NORTHEAST GOMEX MAINTAINS A STEADY INFLUX OF GULF MSTR. WITH THE THE WARM AND MOIST AIR ADVECTING OVER COOLER SSTS EXPECTED TO RESULT IN MARINE FOG FORMATION AGAIN THIS EVENING. THE UPPER LOW TO THE WEST IS PROGGED TO BEGIN SLOWLY OPENING UP LIFTING EASTWARD TONIGHT.
TONIGHT WHEN AN UPPER LOW NOW OVER SOCAL MOVES TO THE EAST. NORTHERN CALIFORNIA REMAINS UNDER A STAGNANT WEATHER PATTERN WITH AN UPPER RIDGE NOSING INTO THE PACIFIC NORTHWEST AND OVER NORTHERN CALIFORNIA. THE HIGH PRESSURE RIDGE WILL CONTINUE TO SHUNT ALL RAIN CHANCES WELL NORTH OF OUR DISTRICT THROUGH THE FORECAST PERIOD. KEEPS THE RIDGE INTACT FOR CONTINUED DRY CONDITIONS FOR NORTHERN CALIFORNIA. KSFO BRIDGE APPROACH. A THERMAL TROUGH WILL MAINTAIN MODERATE NORTHERLY WINDS ACROSS THE COASTAL WATERS TODAY INTO SATURDAY. WIND AND SEA CONDITIONS ARE EXPECTED TO IMPROVE SATURDAY AS THE THERMAL TROUGH WEAKENS.
539 AM CST FRI JAN 30 2015 HIGH PRESSURE WILL BE OVER THE AREA TODAY.
646 AM EST FRI JAN 30 2015 LAKE EFFECT SNOW SHOWERS WILL DIMINISH TODAY AS A RIDGE OF HIGH PRESSURE BEGINS TO BUILD IN FROM THE WEST. THIS RIDGE OF HIGH PRESSURE WILL DEPART TO THE EAST TONIGHT ALLOWING FOR A RETURN OF SOUTHERLY WINDS AND MILDER CONDITIONS FOR SATURDAY.
921 AM EST FRI JAN 30 2015 A COLD FRONT CURRENTLY APPROACHING THE NORTHERN FORECAST AREA WILL PUSH ACROSS WEST CENTRAL AND SOUTHWEST FLORIDA TODAY. HIGH PRESSURE WILL BUILD OVER WEST CENTRAL AND SOUTHWEST FLORIDA LATE TODAY AND TONIGHT IN THE WAKE OF THE FRONT WITH WINDS SHIFTING TO THE NORTH AND NORTHEAST WITH DRIER SLIGHTLY COOLER AIR ADVECTING OVER THE REGION. INCREASING MID-HIGH CLOUDINESS TODAY AT ALL TERMINALS AS A COLD FRONT PUSHES ACROSS THE REGION. SKIES WILL BECOME MOSTLY CLEAR TONIGHT AS HIGH PRESSURE BUILDS BACK OVER THE REGION. WINDS AND SEAS WILL INCREASE THIS AFTERNOON ON THE BACK SIDE OF A DRY COLD FRONT MOVING THROUGH THE COASTAL WATERS.
A BROAD UPPER LEVEL LOW WILL ALLOW RAIN AND HIGH ELEVATION SNOW TO SPREAD NORTH ACROSS MUCH OF THE MOJAVE DESERT AND SOUTHERN GREAT BASIN TODAY INTO TONIGHT.
WEAK COLD FRONT IS MOVING THROUGH THE REGION WITH SFC ANALYSIS SHOWING THE BOUNDARY FROM NEAR BRUNSWICK GA TO NEAR/OR JUST S OF LIVE OAK.
A ridge of high pressure will continue to be the dominant feature over the Northern Rockies today causing another morning of fog.
500 MB FLOW BECOMES ZONAL TODAY INTO SATURDAY MORNING AS A MID-LEVEL VORTICITY MAX APPROACHES MONTANA AND A CUT-OFF LOW SLIDES THROUGH THE SOUTHWEST U.
HIGH PRESSURE WILL MOVE FROM THE UPPER MIDWEST TO THE OHIO RIVER VALLEY AND EXTEND INTO THE MIDSOUTH. DRY WEATHER WILL PERSIST INTO THE DAY SATURDAY WITH COOL HIGH PRESSURE CONTINUING TO DOMINATE OUR WEATHER. TEMPERATURES WILL BE A LITTLE WARMER IN THE AFTERNOON AS WINDS TURN TO THE SOUTHEAST. A CHANGE IN THE WEATHER WILL OCCUR SATURDAY NIGHT AS A WARM FRONT APPROACHES FROM THE SOUTHWEST AND A NORTHERN STREAM UPPER LEVEL SHORT WAVE APPROACHES FROM THE NORTHWEST.
A MUCH COOLER DAY TODAY AS THE COOLER AIR MASS AND INCREASING CLOUDS INHIBIT DIURNAL TEMPS FROM RISING MUCH BEYOND 60 FOR THE CWA. THE ONSET OF RAIN ALONG THE RIO GRANDE VALLEY LOOKS TO BE RIGHT AROUND MIDNIGHT TONIGHT AS THE UPPER LOW JUST OFF THE COAST OF SOUTHERN CALIFORNIA BRINGS BROAD UPPER LEVEL ENERGY INTO THE WESTERN HALF OF TEXAS. A 40+ KT 850 MB LLJ WILL DEVELOP AND BEGIN FEEDING AMPLE MOISTURE INTO THE BROAD LIFT ASSOCIATED WITH THE LOW.
UPPER RIDGING WILL BUILD OVER THE AREA THE NEXT FEW DAYS AS WEAK UPPER TROUGHING IS NUDGED OUT BY HIGH PRESSURE. THE TROUGHING HAS COOLED THE AIR MASS SOME.
636 AM EST FRI JAN 30 2015 AVIATION A COLD FRONT MOVED THROUGH LAST NIGHT BRINGING WITH IT GUSTY WINDS AND SOME LIGHT SNOW.
A ridge of high pressure will continue to be the dominant feature over the Northern Rockies today causing another morning of fog. A cooler modified-arctic airmass looks to spill westward across the Divide and into western Montana Saturday into Saturday night.
COLD FRONT HAS BEEN MOVING THROUGH THE REGION EARLY THIS MORNING. AND COOLER TEMPERATURES ACROSS THE REGION. IT WILL FEEL FAIRLY COOLER TODAY COMPARED TO THE PAST FEW DAYS.
BUT WITH TEMPERATURES AOB FREEZING AT KCSV. NO FREEZING SHOULD TAKE PLACE. A MUCH COLDER AIR MASS IS IN PLACE THAN 24 HRS AGO, WITH STRONG HIGH PRESSURE OVER THE UPPER MIDWEST BUILDING INTO MIDDLE TENNESSEE.
542 AM CST Fri Jan 30 2015 High pressure will build across central and southeast Illinois today from the northwest. This Canadian high will bring cooler air into the area than yesterday, but the fact that winds will be much lighter and at least partly sunny skies are anticipated should make for a decent late January day. Skies across the area are rapidly clearing from the northwest as the high builds in, but there are still significant patches of clouds upstream beneath the ridge axis across the upper Midwest.
619 AM EST FRI JAN 30 2015 DRY HIGH PRESSURE WILL BUILD OVER THE REGION BEHIND THE FRONT TODAY AND SATURDAY.