Aikyam-Lab/Synoptic-Bench huggingface dataset:
MOSTLY 20S INSTEAD OF TEMPS AROUND AND ABOVE FREEZING. SOUTHERN PORTIONS OF OKLAHOMA AND WESTERN NORTH TEXAS TO WILL APPROACH OR PERHAPS EXCEED THE FREEZING MARK BRIEFLY THIS AFTERNOON. WILL SPEED UP NORTHWARD PROGRESSION OF TRANSITION TO SLEET AND FREEZING DRIZZLE AND MID LEVEL TEMPS INCREASE AND DRY. LIGHT SNOW WILL GIVE WAY TO PERIODS OF LIGHT SLEET AND FREEZING RAIN THIS AFTERNOON AND OVERNIGHT. FREEZING FOG IS EXPECTED TO DEVELOP EARLY SUNDAY. LESSER SNOW AMOUNTS ARE EXPECTED FARTHER SOUTH WHERE SNOW WILL MIX THROUGH THE TRANSITIONS TO SLEET AND FREEZING RAIN AS STRONG WARMING OCCURS ABOVE THE BOUNDARY LAYER AND WORKS IT WAY TOWARD THE SURFACE THROUGH THE DAY. CURRENTLY WE EXPECT A CHANCE FOR FREEZING RAIN SATURDAY NIGHT TRANSITION TO ALL RAIN BY MID-DAY SUNDAY.
Instead, a walk outside confirms a freezing mizzle that radar is not picking up. There is a chance for freezing drizzle and fog this morning across the area so a Winter Weather Advisory remains in effect through this morning for southeast New Mexico, the Permian Basin, the Guadalupe and Davis Mountains, and the Trans Pecos area. Areas of drizzle and freezing drizzle will remain possible across the far eastern CWA through tonight. An upper trough will begin developing just off the coast of California by Sunday with the upper flow becoming westerly to southwesterly.
549 AM EST SAT FEB 28 2015 HIGH PRESSURE CENTERED OVER OHIO WILL MOVE SLOWLY EAST TO PENNSYLVANIA AND NEW YORK BY THIS EVENING. LOW PRESSURE OVER THE OKLAHOMA PANHANDLE TODAY WILL MOVE ACROSS THE LOCAL AREA ON SUNDAY.
635 AM EST SAT FEB 28 2015 HIGH PRESSURE WILL BRING CONTINUED UNSEASONABLY COLD DRY WEATHER TO THE AREA THROUGH TONIGHT.
COASTAL TROUGH REMAINS THE MAIN FEATURE OF THE SHORT TERM PERIOD. THE GENERAL AGREEMENT THIS MORNING IS FOR THE TROUGH TO REMAIN JUST OFFSHORE. THE TROUGH IS CURRENTLY LOCATED BETWEEN BUOY 20 AND THE COASTLINE. THIS TROUGH WILL ALSO KEEP AN ISENTROPIC LIFT PATTERN INTO THE AREA WITH A MODERATE SOUTHEAST FLOW JUST ABOVE THE SURFACE. THE COASTAL TROUGH WILL GRADUALLY START TO MOVE EASTWARD TONIGHT AND TOMORROW WITH DECREASING POPS TOMORROW. BUT SLIGHTLY WARMER THAN YESTERDAY. AS THE TROUGH EXITS ON SUNDAY. AND NAM MUCH COOLER. HAVE STUCK TOWARD THE WARMER SIDE OF GUIDANCE WITH WARM ADVECTION FEEDING INTO THE AREA.
There is a chance for freezing drizzle and fog this morning across the area so a Winter Weather Advisory remains in effect through this morning for southeast New Mexico, the Permian Basin, the Guadalupe and Davis Mountains, and the Trans Pecos area. Areas of drizzle and freezing drizzle will remain possible across the far eastern CWA through tonight. An upper trough will begin developing just off the coast of California by Sunday with the upper flow becoming westerly to southwesterly.
A COLD SATURDAY MORNING TO START THE WEEKEND WITH HIGH PRESSURE IN PLACE OVER THE REGION AND GENERALLY CLEAR SKIES ALLOWING TEMPERATURES TO DIP INTO THE SINGLE DIGITS AND TEENS BELOW ZERO.
AS THE REGION REMAINS BETWEEN A POSITIVELY-TILTED LONGWAVE TROUGH EXTENDING FROM THE PACIFIC COAST INTO EASTERN CANADA AND THE ATLANTIC SUBTROPICAL RIDGE CENTERED NORTH OF PUERTO RICO. AS THE SUBTROPICAL RIDGE RETROGRADES ACROSS THE GREATER ANTILLES AND EVENTUALLY BECOMES CENTERED ACROSS THE YUCATAN PENINSULA TOMORROW. A RIDGE -- CURRENTLY CENTERED ACROSS EASTERN OHIO/WESTERN PENNSYLVANIA -- IS FORECAST TO SHIFT SLOWLY EASTWARD TODAY. WHICH WILL INDUCE A SOUTHEASTERLY RETURN FLOW AND WARMER AFTERNOON TEMPERATURES ACROSS NORTHERN ALABAMA/SOUTHERN MIDDLE TENNESSEE. TEMPS SHOULD WARM INTO THE LOWER 50S AS THIS CLOUD COVER DISSIPATES DURING THE AFTERNOON. GLOBAL MODELS SUGGEST THAT A STRONG NORTHERN STREAM TROUGH WILL DIG SOUTHEASTWARD INTO THE NORTHERN PLAINS ON SATURDAY NIGHT.
THE HIGHER SNOW TOTALS SHOULD AFFECT MAINLY SOUTHERN KANSAS WITH LIGHTER AMOUNTS IN CENTRAL KANSAS. IF THIS OCCURS THE SNOW COULD SWITCH OVER TO FREEZING DRIZZLE. HOWEVER WE WILL MAINTAIN LIGHT SNOW FOR THE TIME BEING SINCE ANY FREEZING DRIZZLE WOULD BE BRIEF.
THE GRADIENT WEAKENS SUNDAY AS THE LOW DIGS ESE AND THE HIGH SHIFTS OVER THE NRN PLAINS STATES. A DRY SUNDAY NIGHT WILL GIVE WAY TO ANOTHER TROUGH MOVING SOUTH INTO THE PACNW. MODELS HAVE BEEN TRENDING DRIER WITH THIS TROUGH. BUT THEY ARE ALSO NOW SHOWING THE TROUGH SPLITTING AS IT NEARS OUR AREA. THE UPPER LOW THAT IS SHOWN TO SPLIT OFF TO THE SOUTHWEST LOOKS TO HOLD MOST OF THE MOISTURE TO OUR SW AND THE NORTHEAST PART LOOKS TO KEEP THE COLDEST AIR EAST OF THE DIVIDE. HAVE KEPT THE HIGHEST POPS IN THE MOUNTAINS WITH SNOW LEVELS 2500-3500 FT.
619 AM EST SAT FEB 28 2015 HIGH PRESSURE WILL BUILD SOUTH OF THE REGION THIS WEEKEND.
CLOUDY SKIES WILL CONTINUE TODAY KEEPING CONDITIONS COOLER THAN NORMAL.
958 AM EST SAT FEB 28 2015 HIGH PRESSURE CENTERED OVER OHIO WILL MOVE SLOWLY EAST TO PENNSYLVANIA AND NEW YORK BY THIS EVENING. LOW PRESSURE OVER THE OKLAHOMA PANHANDLE TODAY WILL MOVE ACROSS THE LOCAL AREA ON SUNDAY.
458 AM CST Sat Feb 28 2015 An upper level low is currently digging south along the west coast. The farther south track will keep temperatures cooler today through Sunday night.
906 AM CST SAT FEB 28 2015 A WEAK COLD FRONT CURRENTLY MOVING THROUGH CENTRAL NORTH DAKOTA WILL CONTINUE TO PUSH EAST TODAY. A COLD FRONT.
TEMPERATURES ARE EXPECTED TO BE IN THE LOW TO MID 80S AREA WIDE ON SUNDAY.
COLD AIR REMAINS IN PLACE ACROSS THE REGION UNDERNEATH BROAD LONGWAVE TROUGHING OVER THE CONUS. A WEAK DISTURBANCE MOVING BY TO THE SOUTH AND A COLD FRONT CROSSING THE REGION WILL BRING A CHANCE FOR A LITTLE LIGHT SNOW TO THE REGION SUNDAY INTO SUNDAY NIGHT.
AND CIGS ARE EXPECTED TO SETTLE INTO THE LOW MVFR TO IFR RANGE. LIGHT FREEZING OR LIGHT FREEZING DRIZZLE WILL BECOME INCREASINGLY MORE LIKELY.
PRECIP WILL BECOME ALL LIQUID RAIN BY MID MORNING AS TEMPS RISE ABOVE FREEZING AND RAIN IS EXPECTED TO BECOME WIDESPREAD ACROSS THE ENTIRE AREA AFTER 01/00Z AND CONTINUING THROUGH THE END OF THE TAF PERIOD. AND FREEZING RAIN. ALL PRECIPITATION TO TRANSITION TO RAIN LATER THIS MORNING AS TEMPERATURES RISE ABOVE FREEZING.
647 AM CST SAT FEB 28 2015 WV IMAGERY SHOWING A BROAD TROF THE DOMINATE FEATURE ACROSS THE CONUS THIS MORNING WITH THE JET STREAM DIPPING ALL THE WAY DOWN INTO THE SOUTHERN TIER STATES.
615 AM CST SAT FEB 28 2015 COASTAL SURFACE PRESSURE TROUGHING WILL AID IN VEERING EASTERLIES TO THE SOUTHEAST BY EARLY SUNDAY. FURTHER TO THE NORTH WHERE TEMPERATURES ARE RUNNING 3 TO 5 DEGREES ABOVE FREEZING. IT LOOKS LIKE PERIODS OF MAINLY LIGHT RAIN/SHOWERS WILL BE FOUND ACROSS PORTIONS OF SOUTHEAST TEXAS OVER THE WEEKEND AS A TROF AXIS DEVELOPS NEAR THE COAST AND DISTURBANCES MOVE ACROSS THE AREA ALONG A STRENGTHENING SOUTHWEST FLOW ALOFT. WHILE MOST OF THE AREA'S TEMPERATURES WILL BE WARMER THAN OBSERVED OVER THE LAST SEVERAL DAYS (RECORD LOW MAXIMUM TEMPERATURE SET YESTERDAY AT COLLEGE STATION).
DID HEDGE TEMPERATURES A LITTLE MORE TOWARDS THE WARMER END OF THE GUIDANCE. THUS WOULD EXPECT TEMPERATURES TO BE A BIT WARMER DURING THE DAY. SUNDAY WILL BE WARMER. BUT STILL STRUGGLING TO REACH FREEZING.
AS THE ARCTIC HIGH PRESSURE SYSTEM LOOSES ITS GRIP EXPECT A WARMER DAY WITH HIGHS FROM THE MID 30S ACROSS PARTS OF NE AR TO AROUND 50 IN NE MS. THESE AREAS COULD SEE SOME LIGHT PRECIP OVERNIGHT INCLUDING THE CHANCE FOR FREEZING RAIN AS WARMER AIR MOVES IN ALOFT.
621 AM EST SAT FEB 28 2015 HIGH PRESSURE RIDGE WILL REMAIN OVER THE AREA THROUGH EARLY SUNDAY.
644 AM EST SAT FEB 28 2015 HIGH PRESSURE RIDGE WILL REMAIN OVER THE AREA THROUGH EARLY SUNDAY.
650 AM EST SAT FEB 28 2015 AVIATION WEAK LOW PRESSURE WILL MOVE ACROSS SOUTHERN LOWER MICHIGAN THIS EVENING AND SUNDAY SPREADING LIGHT SNOW AS IT MOVES EAST.
WITH LIGHT FREEZING RAIN/FREEZING DRIZZLE EXPECTED FROM LATER TONIGHT INTO SUNDAY MORNING AS WARMER AND DRIER AIR ALOFT BEGINS TO OVER TAKE THE REGION.
A FEW SPOTS HAVE TEMPERATURES RUNNING WARMER THAN FORECAST WITH THE ADDITIONAL SUNSHINE.
AT THE SAME TIME, AN UPPER LEVEL LOW PRESSURE CENTER WILL BE SITUATED OVER SOUTHERN CALIFORNIA. AS THE NORTHERN PLAINS TROUGH MOVES EAST ON SUNDAY, A GENERAL DECREASE IN PRECIPITATION CHANCES WILL BE SEEN ACROSS THE CENTRAL HIGH PLAINS. SUNDAY NIGHT, A WEAK FAST MOVING DISTURBANCE WILL BRING A SLIGHT CHANCE FOR LIGHT SNOW TO WEST CENTRAL KANSAS SUNDAY NIGHT BUT AT THE SAME TIME, UPPER LEVEL RIDGING WILL BE DEVELOPING OVER THE CENTRAL HIGH PLAINS.
AS SNOW ACROSS THE NORTHERN TAF SITES TRANSITIONS TO SLEET AND FREEZING RAIN.
ANOTHER AVIATION HAZARD WILL BE ICING ON APPROACH AND DEPARTURE WITH A SATURATED SURFACE TO 1000 FT LAYER THAT IS BELOW FREEZING WHERE LIQUID WATER EXISTS. FREEZING DRIZZLE CONTINUES TO AFFECT THE SOUTHERN EDWARDS PLATEAU AND HILL COUNTRY WHILE LIGHT RAIN/DRIZZLE AFFECTS THE REMAINDER OF SOUTH CENTRAL TEXAS. WITH TEMPERATURES IN THE UPPER 20S AND LOWER 30S EARLY THIS MORNING AND EXPECTED TO SLOWLY COME OUT FROM THE FREEZING MARK. BRIDGES AND OVERPASSES. TEMPERATURES SHOULD BE IN THE MID 30S WHILE REACHING THE LOWER 40S BY MID AFTERNOON.
537 AM CST SAT FEB 28 2015 HIGH PRESSURE WILL CONTINUE TO PUSH OFF TO THE EAST TODAY. THIS WILL PLAY OUT TO HIGHS IN THE LOWER 20S FROM EAST CENTRAL SD INTO THE IOWA GREAT LAKES AREA. WITH THE TROUGH CONTINUING TO SETTLE SOUTHWARD SUNDAY.
AND KEPT HIGH TEMPS ACROSS THE EAST IN THE LOWER 50S.
TEMPERATURES CONTINUE TO STAY AT OR BELOW FREEZING AND THIS DRIZZLE WILL FREEZE ON CONTACT WITH FROZEN SURFACES. WITH REPORTS OF NUMEROUS ICY OVERPASSES AND BRIDGES ANY ADDITIONAL FREEZING DRIZZLE WILL ONLY MAKE THINGS WORSE. ANOTHER AVIATION HAZARD WILL BE ICING ON APPROACH AND DEPARTURE WITH A SATURATED SURFACE TO 1000 FT LAYER THAT IS BELOW FREEZING WHERE LIQUID WATER EXISTS. FREEZING DRIZZLE CONTINUES TO AFFECT THE SOUTHERN EDWARDS PLATEAU AND HILL COUNTRY WHILE LIGHT RAIN/DRIZZLE AFFECTS THE REMAINDER OF SOUTH CENTRAL TEXAS. WITH TEMPERATURES IN THE UPPER 20S AND LOWER 30S EARLY THIS MORNING AND EXPECTED TO SLOWLY COME OUT FROM THE FREEZING MARK. BRIDGES AND OVERPASSES. TEMPERATURES SHOULD BE IN THE MID 30S WHILE REACHING THE LOWER 40S BY MID AFTERNOON.
SHOWER ACTIVITY SHOULD INCREASE LATER THIS AFTERNOON AS A COASTAL LOW OVER THE LOWER TX COAST BEGINS TO MOVE UP ALONG THE GULF COAST. /ISSUED 615 AM CST SAT FEB 28 2015/ COASTAL SURFACE PRESSURE TROUGHING WILL AID IN VEERING EASTERLIES TO THE SOUTHEAST BY EARLY SUNDAY. FURTHER TO THE NORTH WHERE TEMPERATURES ARE RUNNING 3 TO 5 DEGREES ABOVE FREEZING. IT LOOKS LIKE PERIODS OF MAINLY LIGHT RAIN/SHOWERS WILL BE FOUND ACROSS PORTIONS OF SOUTHEAST TEXAS OVER THE WEEKEND AS A TROF AXIS DEVELOPS NEAR THE COAST AND DISTURBANCES MOVE ACROSS THE AREA ALONG A STRENGTHENING SOUTHWEST FLOW ALOFT. WHILE MOST OF THE AREA'S TEMPERATURES WILL BE WARMER THAN OBSERVED OVER THE LAST SEVERAL DAYS (RECORD LOW MAXIMUM TEMPERATURE SET YESTERDAY AT COLLEGE STATION).
A SNOW ADVISORY HAS BEEN ISSUED FROM MIDNIGHT TO 6 PM CST SATURDAY FOR ALL OF SOUTHWEST AND SOUTH CENTRAL KANSAS EXCEPT FOR SCOTT AND TREGO COUNTIES FOR 2 TO 4 INCHES WITH THE HIGHEST AMOUNTS CLOSER TO THE OKLAHOMA BORDER. AT THE SAME TIME, AN UPPER LEVEL LOW PRESSURE CENTER WILL BE SITUATED OVER SOUTHERN CALIFORNIA. AS THE NORTHERN PLAINS TROUGH MOVES EAST ON SUNDAY, A GENERAL DECREASE IN PRECIPITATION CHANCES WILL BE SEEN ACROSS THE CENTRAL HIGH PLAINS. SUNDAY NIGHT, A WEAK FAST MOVING DISTURBANCE WILL BRING A SLIGHT CHANCE FOR LIGHT SNOW TO WEST CENTRAL KANSAS SUNDAY NIGHT BUT AT THE SAME TIME, UPPER LEVEL RIDGING WILL BE DEVELOPING OVER THE CENTRAL HIGH PLAINS.
CURRENT WATER VAPOR IMAGE SHOWS THE UPPER TROUGH MOVING SOUTH AND IS OVER THE FORECAST AREA. PLENTY OF SHOWERS ARE AROUND AND SOME OF THOSE ARE IN THE LOWER LEVELS THAT THE RADAR CANNOT PICK UP ON, ESPECIALLY EAST OF THE CASCADES BECAUSE IT'S OVER SHOOTING THE LOW LEVEL MOISTURE. TEMPERATURES EAST OF THE CASCADES HAVE BEEN SITTING AROUND FREEZING. THE NAM CONTINUES TO SHOW UPSLOPE FLOW EAST OF THE CASCADES AS HIGH PRESSURE BUILDS IN FROM THE NORTH. AS THE UPPER TROUGH MOVES SOUTH THIS AFTERNOON, A DRY NORTHEAST FLOW WILL SET UP AND WE'LL SEE PRECIPITATION QUICKLY ENDING FROM NORTHWEST TO SOUTHEAST. THE UPPER TROUGH/LOW WILL CONTINUE TO MOVE SOUTH TONIGHT AND RIDGE WILL NUDGE INTO WESTERN OREGON.
626 AM EST SAT FEB 28 2015 HIGH PRESSURE BUILDS INTO THE AREA THROUGH TONIGHT. A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT.
THE UPPER MISSISSIPPI RIVER VALLEY REGION IS STARTING TO GET INTO THE WESTERN PERIPHERY OF THIS RIDGE WITH WINDS COMING AROUND TO THE SOUTH. AS THE RIDGE CONTINUES TO DRIFT TO THE EAST TODAY. THE NEXT SYSTEM WILL MOVE INTO THE REGION WITH INCREASING CLOUD COVER COMING IN AHEAD OF A 700MB TROUGH THIS AFTERNOON. 00Z NAM/GFS FORECAST SOUNDINGS SUGGEST THAT THERE COULD BE SOME SATURATION THAT OCCURS WITH WEAK LIFT AHEAD OF A SURFACE COLD FRONT TONIGHT. THESE FLURRIES SHOULD DROP OFF SUNDAY NIGHT AS A RIDGE OF HIGH PRESSURE MOVES IN FROM THE WEST.
1007 AM EST SAT FEB 28 2015 HIGH PRESSURE BUILDS INTO THE AREA THROUGH TONIGHT. A COLD FRONT WILL PASS THROUGH THE AREA SUNDAY NIGHT.
The upper low that was to bring some light accumulating snow is a bit further south than anticipated.
448 AM MST SAT FEB 28 2015 COLD CONDITIONS ACROSS THE TRI STATE REGION THIS MORNING AS TEMPERATURES RANGE IN THE LOW TEENS AND SINGLE NUMBERS UNDER MAINLY CLOUDY SKIES. WITH MODELS ONLY CARRYING A WEAK 700MB TROUGH ACROSS THE AREA. FOLLOWED BY WEAK MID LEVEL RIDGING GOING INTO THE EVENING HRS. WHICH WILL BE CLOSER TO MAIN TROUGH DYNAMICS AS IT PASSES.
MODELS SHOW TROUGH SHARPENING TODAY WITH WINDS INCREASING ON THE NW SIDE. WINDS AND PRESSURE GRADIENT WILL INCREASE AND PEAK THIS AFTERNOON AS INVERTED TROUGH OFFSHORE SHARPENS WITH BUILDING STRONG HIGH PRESSURE TO THE NORTH.
A STORM SYSTEM WILL BRING SHOWERS AND COOLER TEMPERATURES TO THE AREA THROUGH SATURDAY NIGHT.
Clouds and heavy freezing drizzle look to hang on most of the day for the Permian Basin and SE NM which should keep temps from moving too much. Instead, a walk outside confirms a freezing mizzle that radar is not picking up. There is a chance for freezing drizzle and fog this morning across the area so a Winter Weather Advisory remains in effect through this morning for southeast New Mexico, the Permian Basin, the Guadalupe and Davis Mountains, and the Trans Pecos area. Areas of drizzle and freezing drizzle will remain possible across the far eastern CWA through tonight. An upper trough will begin developing just off the coast of California by Sunday with the upper flow becoming westerly to southwesterly.
AN UPPER LOW WILL CONTINUE TO MOVE SOUTH OF SOUTHWEST WASHINGTON AND NORTHWEST OREGON THIS MORNING WITH DRYING AND CLEARING SKIES SPREADING IN FROM THE NORTH AND SOME LOCALLY BREEZY NORTHEAST WIND. AN UPPER LEVEL RIDGE WILL THEN BE ANCHORED WITH ITS AXIS ALONG 140W FOR SEVERAL DAYS.
545 AM CST SAT FEB 28 2015 ARCTIC HIGH PRESSURE IS DEPARTING OFF TO THE EAST THOUGH RIDGING REMAINS EXTENDED INTO NORTHEAST IOWA.
LIGHT SNOW WILL GIVE WAY TO PERIODS OF LIGHT SLEET AND FREEZING RAIN THIS AFTERNOON AND OVERNIGHT. FREEZING FOG IS EXPECTED TO DEVELOP EARLY SUNDAY. LESSER SNOW AMOUNTS ARE EXPECTED FARTHER SOUTH WHERE SNOW WILL MIX THROUGH THE TRANSITIONS TO SLEET AND FREEZING RAIN AS STRONG WARMING OCCURS ABOVE THE BOUNDARY LAYER AND WORKS IT WAY TOWARD THE SURFACE THROUGH THE DAY. CURRENTLY WE EXPECT A CHANCE FOR FREEZING RAIN SATURDAY NIGHT TRANSITION TO ALL RAIN BY MID-DAY SUNDAY.
CURRENT REGIONAL RADAR TRENDS WOULD PUT THE HIGHEST SNOW TOTALS THIS MORNING FOR AREAS BORDERING OK AS THEY STAY IN THE MODERATE SNOW A BIT LONGER. THE HIGHER SNOW TOTALS SHOULD AFFECT MAINLY SOUTHERN KANSAS WITH LIGHTER AMOUNTS IN CENTRAL KANSAS. IF THIS OCCURS THE SNOW COULD SWITCH OVER TO FREEZING DRIZZLE. HOWEVER WE WILL MAINTAIN LIGHT SNOW FOR THE TIME BEING SINCE ANY FREEZING DRIZZLE WOULD BE BRIEF.
930 AM EST SAT FEB 28 2015 A HIGH PRESSURE RIDGE WILL REMAIN OVER THE AREA THROUGH EARLY SUNDAY.
426 AM CST SAT FEB 28 2015 HIGH PRESSURE WILL CONTINUE TO PUSH OFF TO THE EAST TODAY. THIS WILL PLAY OUT TO HIGHS IN THE LOWER 20S FROM EAST CENTRAL SD INTO THE IOWA GREAT LAKES AREA. WITH THE TROUGH CONTINUING TO SETTLE SOUTHWARD SUNDAY.
LIGHT FREEZING OR LIGHT FREEZING DRIZZLE WILL BECOME INCREASINGLY MORE LIKELY.
914 AM EST SAT FEB 28 2015 HIGH PRESSURE WILL BUILD SOUTH OF THE REGION THIS WEEKEND.
420 AM PST Sat Feb 28 2015 A weather system is impacting California today with cooler and wetter weather.
THE COASTAL TROUGH RESPONSIBLE FOR THESE CONDITIONS WILL EVENTUALLY MOVE EASTWARD OUT OF THE AREA LATER TODAY AND WILL BRING IMPROVING CONDITIONS TOMORROW. COASTAL TROUGH REMAINS THE MAIN FEATURE OF THE SHORT TERM PERIOD. THE GENERAL AGREEMENT THIS MORNING IS FOR THE TROUGH TO REMAIN JUST OFFSHORE. THE TROUGH IS CURRENTLY LOCATED BETWEEN BUOY 20 AND THE COASTLINE. THIS TROUGH WILL ALSO KEEP AN ISENTROPIC LIFT PATTERN INTO THE AREA WITH A MODERATE SOUTHEAST FLOW JUST ABOVE THE SURFACE. THE COASTAL TROUGH WILL GRADUALLY START TO MOVE EASTWARD TONIGHT AND TOMORROW WITH DECREASING POPS TOMORROW. BUT SLIGHTLY WARMER THAN YESTERDAY. AS THE TROUGH EXITS ON SUNDAY. AND NAM MUCH COOLER. HAVE STUCK TOWARD THE WARMER SIDE OF GUIDANCE WITH WARM ADVECTION FEEDING INTO THE AREA.
647 AM EST SAT FEB 28 2015 HIGH PRESSURE WILL MOVE EAST OF THE REGION TODAY. A WARM FRONT WILL DEVELOP SOUTH OF THE AREA TONIGHT. LIFT NORTH ON SUNDAY AND THEN BE FOLLOWED BY A COLD FRONT ON SUNDAY EVENING.
THE COOLER WATERS OF THE GULF HAVE CONTRIBUTED TO MAINTAIN LOWER CELINGS AND IFR CONDITIONS. TEMPERATURES ARE EXPECTED TO BE IN THE LOW TO MID 80S AREA WIDE ON SUNDAY.
LESSER SNOW AMOUNTS ARE EXPECTED FARTHER SOUTH WHERE SNOW WILL MIX THROUGH THE TRANSITIONS TO SLEET AND FREEZING RAIN AS STRONG WARMING OCCURS ABOVE THE BOUNDARY LAYER AND WORKS IT WAY TOWARD THE SURFACE THROUGH THE DAY. CURRENTLY WE EXPECT A CHANCE FOR FREEZING RAIN SATURDAY NIGHT TRANSITION TO ALL RAIN BY MID-DAY SUNDAY.
ANOTHER UPPER LEVEL TROUGH WILL MOVE ACROSS THE NORTHERN PLAINS ON SUNDAY.
SHALLOW COLD FRONT PLOWS THROUGH WITH NICE LOW LEVEL EAST AND SOUTHEAST UPSLOPE DEVELOPING. AS LIFT OF THE LOW LEVEL MOIST AIRMASS WILL BE MINIMAL.
203 AM EDT SUN MAR 15 2015 A COLD FRONT CROSSES THE AREA THIS EVENING. HIGH PRESSURE BUILDS INTO THE AREA SUNDAY THROUGH MONDAY.
321 AM CDT SUN MAR 15 2015 A RELIEF FROM THE WET PATTERN TO START THE WEEK IS IN STORE FOR MIDDLE TN AS UPPER LEVEL RIDGING BUILDS OVER THE OH AND MS RIVER VALLEYS.
HIGH PRESSURE OVER CALIFORNIA WILL WEAKEN AND RESULT IN COOLING OVER THE NEXT TWO DAYS.
DETAILS: STRONG SUBSIDENCE REGIME WITH PASSING MID LEVEL RIDGING AND DEVELOPING WAA PATTERN SHOULD PUT THE KIBOSH ON ANY LINGERING STRATUS EARLY. COASTAL AREAS AND EASTERN UPPER WILL REMAIN A FEW DEGREES COOLER. A MILD OVERNIGHT (LOWS ABOVE FREEZING) EXPECTED AS CORE OF THERMAL RIDING PASSES OVERHEAD. LEAD SURFACE/LOW LEVEL TROUGH PASSES THROUGH THIS EVENING/EARLY OVERNIGHT. A MILD START THEN MUCH COOLER. A COLD FRONT WILL MOVE THROUGH THE REGION ON MONDAY WITH A TRAILING RIBBON OF MOISTURE LEADING TO A CHANCE FOR RAIN SHOWERS WHICH MAY EVEN MIX WITH OR CHANGE OVER TO SNOW SHOWERS BY EVENING (ESPECIALLY IN THE HIGHER TERRAIN).
This will all take place to the north of an upper cutoff low currently near the southern tip of the Baja Peninsula, and behind a modest cold front where not much cooling has taken place except for mid level cloud cover.
WEAK HIGH PRESSURE IS RIDGING IN FROM THE NORTH THIS MORNING WHILE MID AND HIGH LEVEL MOISTURE IS STREAMING IN FROM THE PACIFIC. AN UPPER DISTURBANCE NEAR THE SOUTH END OF THE BAJA PENINSULA WILL SLOWLY RETROGRADE THROUGH THE NEXT 48 HRS WHILE RIDGING OCCURS LOCALLY.
254 AM EDT SUN MAR 15 2015 A MOISTURE LIMITED COLD FRONT WILL MOVE THROUGH THE REGION OVERNIGHT. DRY HIGH PRESSURE WILL BUILD ACROSS THE REGION SUNDAY THROUGH MONDAY WITH TEMPERATURES ABOVE NORMAL.
UPPER LEVEL LOW/COLD POOL OVER EASTERN ONTARIO WILL SLOWLY PULL AWAY.
341 AM CDT SUN MAR 15 2015 A SPLIT FLOW UPPER AIR PATTERN REMAINS IN PLACE ACROSS THE UNITED STATES AS AN UPPER LEVEL LOW PRESSURE SOUTH OF THE GULF OF CALIFORNIA IN MEXICO REMAINS CUT OFF FROM THE MEAN FLOW AND A DEEP UPPER TROUGH DIGS ACROSS NEW ENGLAND. BUILDING HEIGHTS ON THE BACK SIDE OF THE NEW ENGLAND UPPER TROUGH AND AHEAD OF THE CUT OFF LOW OVER MEXICO SHOULD KEEP DRY CONDITIONS IN PLACE ACROSS THE MID SOUTH FOR THE NEXT FEW DAYS. HIGH PRESSURE WILL ALSO MOVE EAST ACROSS THE REGION WITH A RETURN TO SOUTHERLY LOW LEVEL FLOW BY MONDAY. WARMER TEMPERATURES CAN BE EXPECTED TODAY WITH MOST LOCATIONS REBOUNDING TO SLIGHTLY ABOVE SEASONAL AVERAGES. EVEN WARMER WEATHER IS EXPECTED ON MONDAY WITH TEMPERATURES SEVERAL DEGREES ABOVE AVERAGE.
451 AM EDT SUN MAR 15 2015 UPPER LEVEL LOW PRESSURE AND A DEVELOPING COASTAL LOW WILL CONTINUE TO PROVIDE THE NORTH COUNTRY WITH A MIX OF RAIN AND SNOW SHOWERS TODAY, WITH THE MOST NOTABLE SNOW ACCUMULATIONS OCCURRING ACROSS CENTRAL AND NORTHEAST VERMONT.
Variable high cloudiness associated with an upper low over Baja California will limit highs mainly to the upper 60s.
409 AM MDT SUN MAR 15 2015 HIGH PRESSURE ALOFT WILL CONTINUE TO BUILD OVER COLORADO TODAY WITH RISING HEIGHTS AND WARMER TEMPERATURES. APPEARS THAT MUCH OF THIS HIGH CLOUDS WILL SHIFT EAST OF COLORADO LATER THIS MORNING AND AFTERNOON. TONIGHT LOOKS TO BE MOSTLY CLEAR SKIES AS THE BROAD RIDGE ALOFT BUILDS IN FROM THE SOUTHWEST WITH NO WEATHER IMPACTS EXPECTED. HOWEVER A WEAK AND MOSTLY DRY COLD FRONT WILL PUSH SOUTH ACROSS THE AREA IN THE AFTERNOON. LOOK FOR TEMPERATURES TO BE ABOUT 20 DEGREES COOLER ACROSS THE PLAINS AND LOWER FOOTHILLS. SOME MOISTURE WILL LIKELY BE AVAILABLE FOR SCATTERED RAIN AND SNOW SHOWERS OVER THE HIGHER TERRAIN MAINLY ALONG AND SOUTH OF I70.
319 AM CDT SUN MAR 15 2015 WARMER TEMPERATURES ARE ON TAP FOR TODAY AND MONDAY AS HIGH PRESSURE PREVAILS AT THE SURFACE AND ALOFT.
327 AM EDT SUN MAR 15 2015 HIGH PRESSURE MOVING FROM THE CENTRAL UNITED STATES TO THE GULF COAST WILL RESULT IN DRY CONDITIONS THROUGH MONDAY. NO SENSIBLE WX CONCERNS THIS PD AS RIDGING ALOFT BUILDS ACROSS THE MIDWEST/WRN GREAT LAKES. XPCD WAA INADV OF PROGRESSIVE SW ADVG EWD THROUGH CNTRL CANADA AND DEGREE OF THERMAL RIDGING THAT BUILDS THIS AFTN. AN UNSEASONABLY MILD MONDAY WILL GIVE WAY TO COOLER/SEASONAL WX 925 MB TEMPS PUSHING 13-15C IN A WELL MIXED PRE-FRONTAL ENVIRONMENT SHOULD AFFORD MID 60S-LOW 70S HIGHS MONDAY.
THE SYNOPTIC PATTERN CONTINUES TO SHOW A DEEP LOW PRESSURE SYSTEM NEAR THE TIP OF BAJA. THIS LOW HAS BEEN STUCK IN A REX BLOCKING PATTERN WITH A STRONG RIDGE DIRECTLY NORTH OF THE LOW CENTER. NOTHING SUBSTANTIAL IS EXPECTED MONDAY WITH HIGHS A BIT WARMER THAN TODAY.
108 AM EDT SUN MAR 15 2015 HIGH PRESSURE WILL BUILD EAST ACROSS THE AREA THROUGH THE WEEKEND. A COLD FRONT WILL PUSH SOUTH THROUGH THE AREA MONDAY NIGHT. LOW TEMPERATURES WILL DROP TO LOWS RANGING FROM THE LOWER 30S FAR NORTH TO THE UPPER 30S FAR SOUTH. A COLD FRONT WILL DROP DOWN INTO THE AREA MONDAY NIGHT.
IN SPITE OF THE PASSAGE OF A WEAK COLD FRONT LATE LAST NIGHT. WITH A ROBUST THERMAL RIDGE OF NEARLY 13 DEG C AT 850MB MON AFTN OVERHEAD. THE SFC SHOULD EASILY REALIZE THE WARMTH AND PUSH SFC TEMPS EASILY TO ARND 70 AND POSSIBLY THE LOW 70S. HOWEVER THE LOW LEVELS STRUGGLE TO FULLY SATURATE FURTHER SOUTH OR OVER THE CWFA. WITH ENSEMBLES DEMONSTRATING A HIGH CONFIDENCE IN THE HIGH AMPLITUDE RIDGE BUILDING ACROSS WESTERN CANADA/ALASKA TOWARDS MID-WEEK. HOWEVER THE LATER PERIODS ARE HINTING THAT A SLUG OF MUCH COOLER AIR MAY SLIDE SOUTH FROM THE HIGH AMPLITDUE RIDGING.
MORNING UPPER AIR ANALYSIS INDICATES UPPER TROUGH DIVING THROUGH THE NE CONUS WHILE UPPER RIDGE SLOWLY CREEPS IN FROM THE S/SE THROUGH THE GULF. WENT A LITTLE WARMER ON LOWS MONDAY MORNING BUT WILL BE COOLER IN THE UPPER 40S/LOW 50S IN THE NE WHILE WARMER IN THE SW WHERE PW'S ARE CLOSER TO AN INCH. EVEN WARMER TEMPS POTENTIALLY INTO THE UPPER 70S TO NEAR 80 DEGREES ARE POSSIBLE ON MONDAY AS 900MB TEMPS WARM NEAR 14-15 DEGREES C. DUE TO THE UPPER RIDGE OVER THE GULF GRADUALLY SLIDING TO THE N AND EVENTUALLY E.
1014 PM PDT Sat Mar 14 2015 Light rain possible northward of I-80 Sunday with cooler temps and breezy to windy conditions over higher terrain.
307 AM MDT SUN MAR 15 2015 NORTHERLY FLOW IN PLACE ALOFT ON THE NOSE OF A RIDGE ORIENTED SW-NE ACROSS THE GREAT BASIN.