Aikyam-Lab/Synoptic-Bench huggingface dataset:
HIGH TEMPERATURES TODAY WILL BE A BIT WARMER SOUTH CENTRAL AS SHORT TERM MODELS SUGGEST MID 50S SOUTHWEST TO LOWER 50S SOUTH CENTRAL AND MID TO UPPER 40S NORTH. ON THIS MORNINGS WEATHER MAP A LARGE REGION OF HIGH PRESSURE WAS CENTERED ACROSS THE CENTRAL US WITH A DRY TROUGH OF LOW PRESSURE ACROSS ALBERTA. RAISED SKY COVER A LITTLE WITH HIGH CIRRUS SPILLING OVER UPPER RIDGE AND SLIDING SOUTHEAST INTO WESTERN NORTH DAKOTA. MOSTLY CLEAR SKIES AND WARM AIR ADVECTION UNDER AN UPPER LEVEL RIDGE WILL PRODUCE TEMPERATURES 10 TO 15 DEGREES WARMER THAN YESTERDAY.
HIGH PRESSURE IS CENTERED OVER KS AND EXTENDS INTO THE MID MISSISSIPPI VALLEY. TEMPS SHOULD BE A FEW DEGREES COOLER THAN THEY WERE LAST NIGHT. RETURN FLOW WILL START TO INCREASE ACROSS THE HIGH PLAINS ON SUN AS A DEEP UPPER TROUGH COMES ON SHORE OVER NORTHERN CA. TOOK A QUICK LOOK AT SOUNDINGS AND THE LOW LEVELS STILL LOOK TOO WARM FOR SNOW OVER OUR CENTRAL KS COUNTIES WED.
233 PM CST SAT NOV 7 2015 QUIET WEATHER CONTINUES IN THE SHORT TERM AS AN UPPER RIDGE BUILDS ACROSS THE REGION SUNDAY.
TONIGHT THROUGH SUNDAY NIGHT SURFACE TROF OVER U. WILL GO TOWARD THE WARMER GFS/MAV GUIDANCE FOR HIGHS ON SUNDAY WITH FULL SUN. THEN AGAIN WILL GO WITH THE COOLER NUMBERS FOR SUNDAY NIGHT WITH CLEAR SKIES AND LIGHT WINDS.
338 PM EST SAT NOV 7 2015 AN APPROACHING COLD FRONT WILL MOVE THROUGH THE REGION BY THIS EVENING.
227 PM EST SAT NOV 7 2015 AN APPROACHING COLD FRONT WILL MOVE THROUGH THE REGION BY THIS EVENING.
HIGH PRESSURE OVER UTAH TODAY WILL SLIDE EAST SUNDAY.
The high anchors and drifts across the Ohio river valley thru the remainder of the weekend into early next work week.
HIGH PRESSURE WITH DRY AIR WILL BUILD IN LATE SUNDAY ENDING THE SHOWERS. THE COMBINATION OF A PROGRESSIVELY COOLER WEST-NORTHWEST FLOW, CROSSING THE EASTERN GREAT LAKES REGION, ALONG WITH AN APPROACHING UPPER- LEVEL TROUGH, WILL KEEP A FAIR AMOUNT OF CLOUDINESS AROUND FOR THE REST OF THE DAY. THIS AFTERNOON WILL FEEL MUCH COOLER AND MORE SEASONABLE THAN RECENT DAYS, WITH HIGHS STILL EXPECTED TO RANGE IN THE 50S. A W TO NW FLOW IS BRINGING IN LOWER CLOUDS AND COOLER AIR. THIS AFTERNOON A SHORT WAVE AND UPPER LEVEL TROF APPROACHES. THIS TROF AND SHORT WAVE EXITING AROUND 6Z. SOME LIGHT SNOW ACCUMULATIONS AT THE HIGHER ELEVATIONS.
HIGH TEMPERATURES THIS AFTERNOON WILL REACH INTO THE LOWER TO MID 50S. MID AND HIGH LEVEL CLOUDS SHOULD ALSO BEGIN TO DROP SOUTHEAST OF THE AREA THIS MORNING AS STRONG MID/UPPER LEVEL FRONT PUSHES ACROSS THE OHIO VALLEY DOWNSTREAM OF NEXT APPROACHING UPPER TROUGH. REINFORCING LOW LEVEL COLD ADVECTION WITH PASSAGE OF THIS NEXT MID/UPPER TROUGH SHOULD KEEP HIGH TEMPS IN THE LOW TO MID 50S DESPITE BETTER INSOLATION TODAY. DEEPER COLD AIR ASSOCIATED WITH MID LEVEL THERMAL TROUGH ADVECTING INTO THE AREA TODAY SHOULD ALLOW FOR DEEP MIXING AND AFTERNOON GUSTS INTO THE 20 TO 25 MPH RANGE. SFC ANTICYCLONE WILL BEGIN TO OVERSPREAD THE AREA TONIGHT FROM THE MID MS VALLEY. A PAIR OF UPPER LEVEL TROFS WILL EJECT NORTHEAST ACROSS THE MIDWEST THIS UPCOMING WEEK.
HIGH PRESSURE IS EXPECTED ACROSS THE AREA FOR THE MOST PART THROUGH THE REST OF THE WEEK. MAY BE SOME FLURRY ACTIVITY FROM TIME TO TIME FROM TUESDAY AFTERNOON INTO WEDNESDAY MORNING AS A POSITIVE TILT UPPER TROUGH SHEARS OUT OVER THE AREA. MODELS ARE NOT PARTICULARLY BULLISH ON ANY MEASURABLE PRECIPITATION WITH THIS TROUGH.
A STRONG RIDGE OF HIGH PRESSURE WILL BUILD OVER THE WEST MUCH OF THIS WEEK BRINGING DRY CONDITIONS AND A GRADUAL WARMING TREND. RIDGING WILL THEN TAKE OVER FOR THE REST OF THE PERIOD.
1128 PM CST MON JAN 25 2016 06Z TAF issuance With approaching upper trough will have increasing chance of precipitation tomorrow.
1229 AM EST TUE JAN 26 2016 COLD FRONT AND SHOWERS PUSH EAST TUESDAY.
WARMER AND DRIER CONDITIONS FROM TONIGHT ON INTO WEDNESDAY. LOOK FOR TEMPERATURES IN THE LOW TO MID 40S TUESDAY AND UPPER 40S/LOW 50S WEDNESDAY.
LOW PRESSURE WAS LOCATED OVER MISSOURI AND HEADING EAST. AN UPPER LEVEL TROUGH AXIS IS MOVING THROUGH WITH SUBSIDENCE MOVING IN NOTED ON WATER VAPOR IMAGERY. ANOTHER RIDGE OF HIGH PRESSURE IS BUILDING OVER THE WESTERN UNITED STATES. EXPECT A WARMER. THIS LEADS TO A FORECAST OF HIGHS IN THE LOW TO UPPER 40S. PERHAPS A FEW MID AND/OR HIGH CLOUDS SPILL OVER THE UPPER RIDGE AXIS DURING THE NIGHT WITH A BIT MORE CLOUDINESS DURING THE DAY AS A WEAK UPPER TROUGH APPROACHES FROM THE NORTH.
1228 AM EST TUE JAN 26 2016 LOW PRESSURE WILL TRACK NORTHEAST THROUGH THE UPPER GREAT LAKES AND BRING SOME LIGHT RAIN AND DRIZZLE TO THE AREA OVERNIGHT. LOWS WILL BE IN THE LOWER TO MIDDLE 30S WITH TEMPERATURES ONLY RISING A FEW DEGREES ON TUESDAY. MID LEVEL MOISTURE SCOURS OUT AND 700-300 MB LAYER QG FORCING WANES LATER IN THE EVENING/OVERNIGHT WHICH SHOULD RESULT IN LESS COVERAGE/MORE DRIZZLE ALONG TRAILING/WEAK COLD FRONT. MOIST/CYCLONIC FLOW AND MODEST COLD ADVECTION UNDER APPROACHING UPPER TROUGH AXIS WILL KEEP LOW CLOUDS AROUND TUESDAY. RAW/BREEZY/CLOUDY WITH TEMPS GENERALLY STEADY IN THE LOW-MID 30S. LARGE SCALE UPPER TROUGH WILL BE CROSSING THE REGION TUESDAY NIGHT HELPING RAISE INVERSION HEIGHTS FOR A BRIEF WINDOW OF LIGHT LAKE EFFECT SNOW.
NE/N WINDS WILL INCREASE TO 15-20 KTS WITH HIGHER GUSTS BEHIND THE COLD FRONT IN THE MORNING. /ISSUED 927 PM CST MON JAN 25 2016/ COLD FRONT HAS BEGUN MOVING INTO OUR NORTHERN COUNTIES WITH SLOWLY FALLING DEW POINTS AND A SLIGHT INCREASE IN WINDS BEHIND THE BOUNDARY. STILL LOOKING FOR COOLER TEMPERATURES AND INCREASING NORTH WINDS BEHIND THE FRONT (BREEZY INLAND AND WINDY ALONG THE COAST AND OFFSHORE).
A cold frontal boundary will continue to push through the region today. The main challenge looks to be the timing of the low level stratus deck behind the front. Toward the end of the week and into the weekend a more zonal flow will evolve allowing for warmer temperatures by the end of the work week.
/ISSUED 240 PM CST MON JAN 25 2016/ LATEST SURFACE ANALYSIS SHOWS A COLD FRONT ACROSS CENTRAL TEXAS WITH NORTHWESTERLY WINDS BEHIND IT ACROSS OUR AREA. COOLER TEMPERATURES HAVE ARRIVED BUT ARE NEAR LATE JANUARY NORMALS.
AN APPROACHING COLD FRONT WILL BRING MVFR CIGS/VSBYS BY 12Z WITH SCT SHRA.
BASED ON FORECAST WINDS OVER THE GULF WATERS TUESDAY BEHIND THE COLD FRONT. RAIN CHANCES WILL BEGIN TO RAMP UP LATE TONIGHT AS A COLD FRONT NOW POSITIONED FROM THE SHREVEPORT AREA THEN SOUTHWEST. WINDS ARE NOT EXPECTED TO RELAX UNTIL LATE WEDNESDAY AS HIGH PRESSURE SETTLES IN.
QUIET WEATHER CONDITIONS EXPECTED THIS EVENING AS WESTERN HALF OF MT SITS UNDER THE STRONG HIGH PRESSURE RIDGE COVERING THE FAR WEST AND GREAT BASIN STATES. A HIGH PRESSURE RIDGE OVER THE WEST COAST WILL MOVE EAST OVER CENTRAL AND SOUTHWEST MONTANA BY LATE TUESDAY. AN UPPER LEVEL SHORT WAVE WILL MOVE INTO THE RIDGE AND CROSS THE ROCKIES TUESDAY NIGHT.
250 AM CST TUE JAN 26 2016 Strato-cumulus clouds have held tough overnight due to continued cold air advection in the low/mid levels of the atmosphere and approaching short wave energy over the Corn Belt. The presence of these clouds and continued cold air advection will result in temperatures struggling to warm out of the lower to middle 30s. Sunshine along with a downslope flow off the plateau will result in temperatures warming into the lower to middle 40s. With light winds and a clearing trend, we have gone on the low side of temperature guidance. Lows are expected to be in the lower 20s over most areas.
SCATTERED SNOW SHOWERS WILL LIKELY CONTINUE OVER THE HIGHER MOUNTAINS THROUGH MUCH OF THE NIGHT AND WIND DOWN AROUND SUNRISE. ELSEWHERE SCATTERED LIGHT SNOW SHOWERS IN THE HIGH COUNTRY SHOULD GRADUALLY END FROM NORTH TO SOUTH OVERNIGHT AS MID- LEVELS DRY AND STABILIZE IN THE WAKE OF THE PASSING TROUGH. CONTINUED WEAK COLD AIR ADVECTION WILL PREVENT MUCH WARMING ON TUESDAY WITH HIGH TEMPERATURES ONLY SLIGHTLY WARMER THAN THOSE TODAY. HIGH PRESSURE RIDGE ALOFT WILL BUILD ACROSS COLORADO TUESDAY NIGHT AND WEDNESDAY WITH A GENERALLY DRY AND STABLE AIRMASS IN PLACE.
OTHERWISE SUNSHINE/DRY AIR AND DOWNSLOPE COMPONENT SHOULD RESULT IN WARMER DAY FOR REMAINDER OF THE AREA. TONIGHT-THU: RIDGE AXIS MOVES ACROSS TONIGHT. WEAK FRONT EDGES INTO AREA SAT NIGHT/SUN SO HIGHS SUN WILL BE COOLER.
257 AM CST TUE JAN 26 2016 COLD FRONT MOVING PAINFULLY SLOW THROUGH LOUISIANA THIS MORNING. SO EVEN THOUGH TEMPS WILL NOT BE AT FREEZING. AS THE COLD FRONT MOVES INTO THE AREA DURING THE MORNING AND EARLY AFTERNOON HOURS. THIS SHOULD REMAIN THE CASE UNTIL THE COLD FRONT WORKS ITS WAY INTO THE COASTAL WATERS TONIGHT.
A BAND OF SHWRS WITH EMBEDDED ISOLATED TSTMS HAS DEVELOPED ALONG A COLD FRONT GENERALLY ALONG AND SE OF A LINE FROM KLFK TO KELD. /ISSUED 928 PM CST MON JAN 25 2016/ COLD FRONT CURRENTLY ALONG A LINE FROM STRONG ARKANSAS TO ARCADIA AND MANSFIELD LOUISIANA AND SOUTHWEST INTO LUFKIN TEXAS. CONVECTION HAS BEEN GRADUALLY INCREASING THROUGH THE EVENING ALONG THE COLD FRONTAL BOUNDARY IN THE FORM OF SCATTERED SHOWERS.
413 AM EST TUE JAN 26 2016 UPPER AIR PATTERN CONSISTS OF A 500 MB RIDGE ON THE WEST COAST. A TROUGH IN THE PLAINS AND SOUTHERN ROCKIES. THIS AFTERNOON AND INTO THE LOWER GREAT LAKES TONIGHT. BRIEF RIDGING WILL BE FOUND ALOFT WEDNESDAY MORNING IN BETWEEN THE MAIN TROUGH EXTENDING FROM THE LOW OVER FAR N QUEBEC THROUGH THE LOWER GREAT LAKES TO N TX.
324 AM CST TUE JAN 26 2016 09z/3am surface analysis shows 1001mb low over northern Lower Michigan, with cold front extending southward through the Ohio River Valley. Due to extensive cloud cover and CAA, high temperatures will hover in the lower to middle 30s. High pressure will build eastward into the Midwest tonight, providing diminishing winds and cold conditions.
A notable pattern shift will get underway on Wednesday as heights begin building overhead as West Coast ridging breaks down and begins sliding east. The GFS actually shows an 850-hPa thermal ridge axis of almost 10C extending over our region.
413 AM EST TUE JAN 26 2016 HIGH PRESSURE OFFSHORE WILL EXTEND INTO THE REGION TODAY. A WEAK COLD FRONT WILL APPROACH THE REGION TONIGHT AND MOVE THROUGH THE REGION WEDNESDAY.
THE LOW-LEVEL FRONTOGENESIS /800MB/ HAS BEEN WORKING ACROSS THE NORTHWEST FORECAST AREA FROM AUSTIN MN TO WABASHA TO TREMPEALEAU COUNTY FOR SEVERAL HOURS NOW WITH FREEZING DRIZZLE IN SUPERCOOLED LIQUID CLOUD. WE COULD SEE FZDZ CONTINUE AWAY FROM THIS BAND FOR 2-3 HOURS YET UNTIL MAIN UPPER LOW COMES IN. HAVE LINGERED FLURRIES THROUGH THE MORNING ON TUESDAY WITH TROUGH OVERHEAD AND STEEPER LAPSE RATES I THE LOW- LEVELS. THERE IS SUGGESTION OF MORE ENERGY IN THE SOUTHERN BASE OF THIS TROUGH AND WILL NEED TO WATCH THIS OVER THE COMING DAYS FOR SNOW CHANCES FURTHER SOUTH. TRANSITION BEGINS LATE IN THE WEEK TOWARD MORE ZONAL FLOW AND THEN LARGE SCALE TROUGH DEVELOPMENT OVER WESTERN NORTH AMERICA.
/ISSUED 914 PM CST MON JAN 25 2016/ SHOWERS CONTINUE TO DEVELOP AHEAD OF AN APPROACHING COLD FRONT. MORNING LOWS SHOULD BE IN THE MID 20S TO LOW 30S WITH HIGHS IN THE LOW TO MIDDLE 40S.
420 AM EST TUE JAN 26 2016 A PASSING COLD FRONT WILL BRING RAIN CHANCES TODAY FOLLOWED BY PERIODIC SNOW SHOWER CHANCES AND SEASONALLY COLD TEMPERATURES THE REST OF THE WEEK. BEFORE SUNRISE THERE MAY STILL BE SOME VERY ISOLATED VALLEY LOCATIONS ACROSS GARRETT COUNTY WHERE COLDER TEMPERATURES HAVE YET TO BE SCOURED OUT IN SOUTHWESTERLY FLOW OR MIXED WITH WARMER TEMPERATURES ALOFT IN SHOWERS. BUT ELSEWHERE LATEST SURFACE OBSERVATIONS SHOW TEMPERATURES ABOVE FREEZING AT THIS POINT. WARMER TEMPERATURES WILL CONTINUE THROUGH MORNING BEFORE THE COLD FRONT BEGINS TO CROSS THE FORECAST AREA AROUND NOON. WHICH IS PROGGED TO BE EAST OF THE RIDGES BY EVENING. SLIGHT CHANCES FOR SNOW WILL CONTINUE THROUGH WEDNESDAY ACROSS THE RIDGES AND ALONG/NORTH OF INTERSTATE 80. BUT WILL DROP AS FAR SOUTH AS PITTSBURGH WEDNESDAY MORNING AS THE MID LEVEL TROUGH PASSES OVERHEAD.
AT 3 AM AROUND THE MIDSOUTH A COLD FRONT WAS LOCATED ROUGHLY ALONG A LINE STRETCHED FROM GRENADA MISSISSIPPI NORTHEAST TO SAVANNAH TENNESSEE. HIGH PRESSURE WILL CONTINUE TO BUILD INTO THE REGION ON WEDNESDAY WITH COLD AIR ADVECTION BOUNDING TEMPERATURES IN THE 40S WITH AN UPPER LEVEL TROUGH AXIS CENTERED OVER THE REGION. IT WILL BE DIFFICULT TO FIND TOO MANY COMPLAINTS ON THE WEATHER THIS WEEK AS HIGH PRESSURE KEEPS CONDITIONS EXTREMELY PLEASANT.
ANOTHER ROUND OF LIGHT SNOW WITH MINOR ACCUMULATIONS IS EXPECTED FOR THIS AFTERNOON AS THE UPPER TROUGH OVER MN MOVES ACROSS WI.
26/06Z TAF CYCLE COLD FRONT OVER EASTERN AND SOUTHEAST ARKANSAS WILL HANG UP TONIGHT. TONIGHT THROUGH TUESDAY NIGHT COLD FRONT MAKING ITS WAY INTO THE AREA THIS AFTERNOON. WITH OVERNIGHT LOWS FALLING BELOW FREEZING ACROSS MUCH OF NORTHERN ARKANSAS. HIGHS ON TUESDAY WILL BE 10 TO 20 DEGREES COOLER THAN THIS AFTERNOON.
Thin band of precip moving through the forecast area this hour, along a cold front.
311 AM CST TUE JAN 26 2016 Upper flow was beginning to transition from southwest to northwest over the Central Plains with mean trough axis slowly moving east of the region. Northwest flow in the lower levels stretches well into the Northern Plains with stratus deck rather solid from eastern Kansas northwest across much of North Dakota. Low level winds back to the west-southwest tonight as weak high pressure moves out Kansas. Clipper system moving into the Great Lakes leads a mid level thermal ridge over the forecast area, and should boost high temperatures back in the upper 40s to near 50, a few degrees cooler over residual snowpack.
Also expect west northwesterly winds to continue to advect colder air into the area today, so don't expect much of a warm-up today, so highs will only be a couple degrees warmer than current temperatures.
1223 AM EST TUE JAN 26 2016 HIGH PRESSURE WILL CONTINUE TO SLIDE OFFSHORE TONIGHT. A COLD FRONT WILL APPROACH FROM THE WEST TUESDAY THEN CROSS THE REGION WEDNESDAY.
SOUTHERLY FLOW CONTINUES AS HIGH PRESSURE HAS MOVED OFF THE EAST COAST. A COLD FRONT APPROACHES FROM THE WEST AND WILL SLOWLY MOVE THROUGH THE AREA TOMORROW WITH SHOWERS ALONG AND BEHIND THE BOUNDARY. CLOUDS WILL BE ON THE INCREASE THIS EVENING AS A COLD FRONT PUSHES TOWARD CENTRAL ALABAMA FROM THE NORTHWEST AND SOUTHWEST FLOW ALOFT RAPIDLY INCREASES. WIDESPREAD RAINS ASSOCIATED WITH THE UPPER SUPPORT AND LIFT ASSOCIATED WITH THE COLD FRONT WILL PUSH INTO OUR NORTHWEST COUNTIES BEGINNING JUST BEFORE SUNRISE ON TUESDAY.
302 AM CST TUE JAN 26 2016 A COLD FRONT WILL CONTINUE MOVING INTO SOUTH TX AND THE TX COASTAL AREAS THIS MORNING.
314 AM CST TUE JAN 26 2016 H5 TROUGH EXTENDS THIS MORNING FROM HUDSON BAY TO ERN NE THENCE SWWD INTO BAJA CALIFORNIA. WITH THE ENERGY DIVING DOWN THE WESTERN PERIPHERY OF THE TROUGH. AS OUR MOST RECENT TROUGH PULLS AWAY FROM THE REGION WE WILL SEE THE START OF A FAIRLY QUIET PERIOD.
AS THE UPPER RIDGE BUILDS IN FROM THE WEST. THE MEASURED WARM SPOT WAS BOISE AT 44 DEGREES WHILE MCCALL AND FAIRFIELD WERE IN THE LOWER 20S. SATELLITE SHOWED SOME MID CLOUDS SHIFTING ACROSS EAST CENTRAL OREGON AND THE LOWER TREASURE VALLEY AND A LOOK OUT THE WINDOW SHOWED THE CLOUDS TO NEAR MERIDIAN. HIGH PRESSURE SURFACE AND ALOFT WILL BRING AN INVERSION THAT WEAKENS WEDNESDAY. THE ASSOCIATED UPPER LEVEL RIDGE AXIS SHARPENS WITH AN INVERSION OVER THE AREA THROUGH TUESDAY. THE RIDGE IS NOT QUITE AS SHARP WEDNESDAY AS A FEATURE MOVES THROUGH IT. BY WEDNESDAY AFTERNOON THE LONGWAVE RIDGE AGAIN DOMINATES.
SOME 40 TO 50 DEGREES WARMER THAN THEY WERE JUST 48 HOURS AGO AT THIS TIME. RADAR IMAGERY AND SURFACE OBS SHOW COLD FRONT HAS JUST PASSED CKV.
112 AM EST TUE JAN 26 2016 HIGH PRESSURE WILL LINGER JUST OFFSHORE TONIGHT. AN APPROACHING COLD FRONT WILL BRING SHOWERS TO THE REGION MID WEEK WHICH MAY STALL ALONG THE COAST AND KEEP WEATHER UNSETTLED THROUGH THE END OF THE WEEK. THE UPPER LEVEL RIDGE WILL HOLD JUST OFF THE COAST TONIGHT.
STALLEY THE COLD FRONT HAS MOVED SOUTH OF OUR CWA AND WILL CONTINUE MOVING SOUTH OVERNIGHT. /ISSUED 317 PM CST MON JAN 25 2016/ A COLD FRONT CONTINUES TO MOVE THROUGH NORTH TEXAS THIS AFTERNOON WITH TEMPERATURES FALLING INTO THE UPPER 50S ACROSS OUR FAR NORTHWEST COUNTIES AND LOWER 70S IN THE SOUTHEAST. TUESDAY IS EXPECTED TO BE QUITE A BIT COOLER ACROSS THE REGION AS COLDER HIGH PRESSURE SETTLES IN. THERE IS ALSO AN ELONGATED TROUGH AXIS OVER THE SOUTHWEST U. THIS UPPER TROUGH AXIS WILL SLOWLY MOVE EAST AND SHOULD BE EAST OF THE AREA LATE WEDNESDAY.
EARLY MORNING SURFACE ANALYSIS HAD A COLD FRONT NEAR A GREENVILLE MISSISSIPPI TO BASTROP LOUISIANA LINE. LOCAL RADARS SHOWED A NARROW BAND OF SHOWERS WITH AN OCCASIONAL LIGHTNING STRIKE ALONG AND JUST AHEAD OF THE COLD FRONT. MODELS AGREE THIS COLD FRONT WILL MOVE SLOWLY ACROSS THE CWA TODAY BECOMING NEAR THE NATCHEZ TRACE CORRIDOR AT SUNRISE AND SOUTHEAST OF HATTIESBURG BY MID AFTERNOON. MORNING LOWS WEDNESDAY WILL BE NEAR FREEZING IN OUR NORTHERN MOST COUNTIES BUT ABOVE FREEZING TO THE SOUTH WHERE RAIN CHANCES WILL BE CARRIED. COOLER AND DRIER CONDITIONS ARE EXPECTED WEDNESDAY AND WEDNESDAY NIGHT. SURFACE RIDGING WILL BECOME CENTERED OVER OUR CWA BY WEDNESDAY EVENING WHILE THE UPPER LEVEL TROUGH AXIS DROPS ACROSS OUR CWA WEDNESDAY NIGHT. AFTERNOON HIGHS WILL RANGE FROM THE MID 40S NORTH TO THE LOWER 50S SOUTHEAST.
115 AM EST TUE JAN 26 2016 LIGHT RAIN WITH POCKETS OF LIGHT FREEZING RAIN ARE POSSIBLE THIS MORNING. GREATEST RISK FOR POCKETS OF LIGHT FREEZING RAIN APPEAR TO BE OVER THE INTERIOR OF CENTRAL PA SOUTH INTO NRN MD/WV PANHANDLES -- WHERE SFC TEMPS HAVE DECOUPLED INTO THE TEENS AT SOME SITES. TEMPS SHOULD WARM ABOVE FREEZING BY LATE MORNING AND END THE LIGHT FZRA THREAT. WHILE A MIX WITH -SHSN IS EXPECTED ACROSS THE WRN MTNS LATER IN THE DAY BEHIND THE AFOREMENTIONED COLD FRONT.
340 AM EST TUE JAN 26 2016 COLD FRONT AND SHOWERS PUSH EAST TODAY.
Cigs have risen into the low end VFR range over NE OK.
1142 PM EST MON JAN 25 2016 AN AREA OF LOW PRESSURE OVER THE CENTRAL PLAINS WILL MOVE INTO THE GREAT LAKES OVERNIGHT. FOLLOWED BY A COLD FRONT TUESDAY.
ACCOMPANYING AN APPROACHING COLD FRONT. MUCH WARMER TEMPERATURES OTHERWISE REIGNED ACROSS THE REGION IN COMPARISON TO THE PAST FEW NIGHTS. A BROAD TROUGHING PATTERN CAN BEST DESCRIBE THE STEERING FLOW SETUP OVER THE LOWER-48. UPPER RIDGING JUST OFF OF THE WEST COAST WAS BEING PUSHED EASTWARD IN PART BY A STRONG ZONAL JET (WITH AVERAGE WINDS SPEEDS AROUND 200KT AT 250M ALONG 40N) FROM JAPAN TO 150W. THE WESTERN RIDGE AS IT BUILDS EASTWARD WILL PUSH HELP THE TROUGH EASTWARD OVER THE NEXT FEW DAYS. AND COLD FRONT MOVE EASTWARD TODAY. HIGHS FOR THE MID WEEK WILL ONLY WARM INTO THE LOW/MID 40S.
1022 PM PST MON JAN 25 2016 High pressure will build over the Inland Northwest through tonight, bringing dry conditions with areas of low clouds and fog.
SOME LOW LVL MOISTURE WILL LINGER IN THE MTNS TODAY WITH A FEW FLURRIES POSSIBLE OVER THE HIGHER PEAKS THIS MORNING OTHERWISE IT WILL BE DRY. TEMPS WILL BE A FEW DEGREES WARMER THIS AFTN OVER NERN CO AS READINGS RISE TO SEASONAL LEVELS.
415 AM EST TUE JAN 26 2016 HIGH PRESSURE OFFSHORE WILL EXTEND INTO THE REGION TODAY. A WEAK COLD FRONT WILL APPROACH THE REGION TONIGHT AND MOVE THROUGH THE REGION WEDNESDAY.
41 HIGH PRESSURE WILL CONTINUE TO MOVE OFFSHORE TONIGHT AS A COLD FRONT MOVES INTO THE LOWER MISSISSIPPI RIVER VALLEY. DO THINK TEMPS/DEWS WILL BE HIGH ENOUGH IN THE HIGHER ELEVATIONS THAT FROZEN PRECIP SHOULD NOT BE A PROBLEM. BOTH THE GFS AND NAM ARE DRYING OUT THE LOW TO MID LEVEL PRETTY FAST AFTER MIDNIGHT. A LITTLE FREEZING DRIZZLE IS POSSIBLE.
123 AM EST TUE JAN 26 2016 THE APPROACH AND PASSAGE OF A COLD FRONT WILL BRING THE CHANCE FOR RAIN THROUGH TUESDAY. THERE IS AN OUTSIDE CHANCE THAT A HANDFUL OF VALLEY LOCATIONS NORTH AND EAST OF PITTSBURGH MAY SEE A BRIEF PERIOD OF FREEZING RAIN WHERE WINDS HAVE DECOUPLED AND TEMPERATURES HAVE DROPPED TO BELOW FREEZING AT PRECIPITATION ONSET. BUT IF THIS OCCURS IT WILL BE VERY SHORT LIVED AS TEMPERATURES WILL QUICKLY CLIMB TO ABOVE FREEZING IF THEY ARE NOT ALREADY THERE.
CONTINUING TO MONITOR TEMPS AND APPEARS ALL AREAS REMAINING ABOVE FREEZING. ACTUALLY AREAS CLOSEST TO FREEZING ARE BANKS COUNTY. TEMPS QUITE A BIT COOLER BUT REMAINING ABOVE FREEZING. THEY BOTH SHOW THE CLOSED LOW THAT DEVELOPS OVER CENTRAL FL THU MORNING MOVING RAPIDLY UP THE EASTERN SEABOARD TO JUST OFF THE NEW ENGLAND COAST BY 12Z FRI. AS THIS LOW CENTER MOVES NE IT PULLS THE LINGERING COLD FRONT OFF THE GA COAST ALLOWING A HIGH PRESSURE RIDGE TO BUILD NE OUT OF THE WESTERN GULF. THIS RIDGE BECOMES CENTERED OVER THE GA/FL BORDER BY SAT AFTERNOON/EVENING KEEPING THINGS DRY THROUGH THE WEEKEND.
FINALLY EXPECT THE LOW CLOUDS TO SLOWLY SCATTER OUT AND LIFT THROUGH THE DAYTIME HOURS AS WINDS BECOME SOUTHWESTERLY ALLOWING DRY AIR INTO THE REGION FROM WEST TO EAST. DAYTIME TEMPERATURES WILL RANGE FROM THE LOWER 20S EAST WHERE CLOUDS REMAIN FOR MOST OF THE AFTERNOON. TO THE LOW 30S SOUTHWEST WHICH REMAINS STRATUS FREE. THERMAL PROFILES WOULD SUGGEST FREEZING RAIN.
339 AM EST TUE JAN 26 2016 LOW PRESSURE MOVING ACROSS THE AREA EARLY THIS MORNING MAY BRING A SPIT OF DRIZZLE OR FLURRIES. LL THERMAL TROUGHING DOES NOT REACH SUFFICIENT INTENSITY UNTIL THIS EVENING TIME W/APCH AND PASSAGE OF UPSTREAM SECONDARY DROPPING THROUGH WRN MN ATTM TO TO POINT OF ACTIVATING POTENTIAL LK EFFECT -SHSN. AFTERNOON WAA SHOULD PUSH HIGHS INTO THE LOW 30S DESPITE MOSTLY CLOUDY SKIES.
For tonight, warmer upper level ridging begins to move into the Plains.
ALSO DUE TO S WINDS 10 TO 15 MPH AND CLOUD COVER RAISED TEMPS INTO THE LOWER 50S.
/issued 337 PM CST MON JAN 25 2016/ (Tonight and Tuesday) The cold front has moved across West Central Texas this afternoon, however the low level cold air advection is lagging behind. For Tuesday, an upper level trough will move into the Southern Plains with a chance of precipitation across much of West Central Texas.
THE UPPER LEVEL SHORT WAVE TROUGH RESPONSIBLE FOR THE PRECIP IS LOCATED FROM DENVER TO YUMA AS OF EARLY THIS AFTN AND WILL BE MOVING SEWD THROUGH THE NEXT 24 HOURS. BUT SLIGHT STRENGTHENING OF THE TROUGH IS PROGGED. THE UPPER LEVEL TROF AXIS WILL BE OVERHEAD FOR JUST A SHORT BIT LATE TUESDAY NIGHT BEFORE QUICKLY PUSHING SOUTH AND EAST BY EARLY WEDNESDAY MORNING.
UPPER TROUGH WILL CONTINUE TO SLIDE SOUTH TUESDAY NIGHT WITH THE UPPER RIDGE BUILDING EAST WITH WARMER AIR ALOFT. HAVE GONE WITH COOLER GUIDANCE WITH SNOW COVER WITH LOWS IN THE TEENS AND AROUND 10F IN THE PLATTE RIVER VALLEY. AN UPPER WAVE ROUNDING THE RIDGE OVER WESTERN CANADA WILL MOVE SOUTHEAST ACROSS MINNESOTA WITH A PUSH OF COLD AIR INTO NORTH CENTRAL NEBRASKA WEDNESDAY ALONG WITH SOME CLOUD COVER BUT DRY.
EXPECT WIDESPREAD CLOUD COVER AND COOLER CONDITIONS IN THE WAKE OF A COLD FRONT TODAY. MAX TEMPS IN THE LOW TO MID 30S ARE LIKELY TO BE REACHED THIS MORNING AS LOW LEVEL COLD ADVECTION IS ONGOING.
HAVE REMOVED THE CHANCE OF WIDESPREAD FOG AND FREEZING DRIZZLE FROM THE FORECAST. WEAK HIGH PRESSURE BUILDS INTO THE NORTHERN PLAINS. HIGH BOUNDARY LAYER MOISTURE OVER THE EASTERN HALF OF THE CWA WILL SUPPORT PATCHY FOG OR FREEZING DRIZZLE OVER THE EAST TONIGHT WITH NO SEEDS ALOFT UPSTREAM PER IR LOOP. UPPER RIDGE BUILDS TOWARD THE CWA WITH SEASONABLE AND NEAR GUIDANCE TEMPERATURES.
AND NOW ARE IN THE LOWER 60S AT MOST OBSERVING SITES. MOVING NORTHWESTWARD OVER THE LOWER STRAITS OF FLORIDA. WINDS HAVE BEEN MUCH LOWER OVER THE COOLER FLORIDA KEYS NEARSHORE WATERS AND WHERE SURFACE BREEZES ARE DECOUPLED FROM THE HIGHER WINDS ALOFT. A POSITIVELY-TILTED LONG-WAVE TROUGH HAS DEVELOPED FROM GREAT LAKES TO BAJA CALIFORNIA.
COLD AIR ADVECTION TUESDAY WILL KEEP TEMPERATURES NEAR NORMAL FOR THIS TIME OF YEAR WITH HIGHS IN THE LOWER 30S AND LOWS IN THE TEENS.
This will continue through the evening hours, before additional light showers arrive along the actual cold front. Low pressure along the IA/IL border this evening will head to the northeast, crossing Michigan tonight and pulling its cold front through southern Indiana and central Kentucky during the pre-dawn hours Tuesday. Low temperatures tonight are expected to remain a few degrees above freezing under overcast skies and with a steady southerly wind around 10 mph. Also, there will be a warm layer just a few thousand feet off the ground with temperatures in the lower 40s. High pressure will begin to build in from the west Tuesday night, but low level moisture moisture may get trapped under a sharp inversion, leading to a continuation of mostly cloudy skies.