Aikyam-Lab/Synoptic-Bench huggingface dataset:
313 AM CDT TUE JUL 21 2015 UPPER-RIDGE BREAKING DOWN ACROSS CENTRAL ARKANSAS AND OKLAHOMA ALLOWING FOR SCATTERED THUNDERSTORMS ACROSS THESE AREAS THIS MORNING. ALLOWING FOR SLIGHTLY COOLER TEMPERATURES IN THIS AREA. UPPER-LEVEL RIDGE TO SHIFT SOUTH AND FLATTEN ALLOWING FOR MAINLY ZONAL FLOW ACROSS THE REGION ON WEDNESDAY.
339 AM CDT TUE JUL 21 2015 A RIDGE OF HIGH PRESSURE BUILDING INTO THE AREA EARLY THIS MORNING WILL HELP KEEP THE WEATHER QUIET ONCE AGAIN TODAY. WITH THE RIDGE OVERHEAD TONIGHT LOWS TONIGHT TO FALL INTO THE MID 40S TO MID 50S WITH GOOD RADIATIONAL COOLING CONDITIONS.
A SURFACE COLD FRONT AND THE PRECIPITATION/CLOUDS NORTH WILL KEEP TEMPERATURES MUCH LESS THAN RECENT DAYS ACROSS THE NORTH.
WE'LL SEE HIGH PRESSURE AT THE SURFACE SETTLE ACROSS THE MID MISSISSIPPI VALLEY.
HEAT ADVISORY REMAINS IN EFFECT THIS AFTERNOON FOR THE EASTERN EXPECT A BETTER POTENTIAL FOR CONVECTION THIS AFT/EVE AS THE WESTERLIES STRENGTHEN /EXTEND FURTHER SOUTH/ IN RESPONSE TO AMPLIFICATION OF AN UPPER LEVEL TROUGH OVER PORTIONS OF EASTERN CANADA. ALBEIT SLIGHTLY COOLER IN THE FAR N/NW PIEDMONT. -VINCENT THE WEAK COLD FRONT EXPECTED TO CROSS CENTRAL NC FROM NW-SE TONIGHT WILL STALL SOMEWHERE NEAR THE NC/SC BORDER. GUIDANCE SUGGESTS A WAVE OF LOW PRESSURE WILL DEVELOP ALONG THE STALLED FRONTAL ZONE WED NIGHT. HIGHS WED SEVERAL DEGREES COOLER IN THE 89-94F RANGE.
122 AM EDT TUE JUL 21 2015 TROUGHING ALOFT HELPING TO BRING IN PLENTY OF LOW-LEVEL MOISTURE AROUND 5KFT OVER UPR MICHIGAN THIS AFTN. SCT-BKN SC/CU HAS RESULTED AND WITH COLD FRONT WORKING ACROSS FAR SE-E CWA. APPEARS THAT SINCE THE HIGH PRESSURE RIDGE WILL REMAIN WEST OF UPPER GREAT LAKES. AS THE UPPER GREAT LAKES REGION WILL BE INCREASINGLY INFLUENCED BY AN UPPER RIDGE.
455 AM EDT TUE JUL 21 2015 A COLD FRONT WILL CONTINUE TO WORK THROUGH THE AREA TODAY. HIGH PRESSURE WILL THEN WORK INTO THE REGION FOR THE MIDDLE OF THE WEEK. COLD FRONT WILL WORK THROUGH THE REGION TODAY AND PRECIPITATION WILL GRADUALLY TAPER OFF THIS EVENING. COOLER AND DRIER AIR WILL WORK INTO THE AREA. DRY CONDITIONS ARE EXPECTED FOR THE REMAINDER OF THE SHORT TERM WITH HIGH PRESSURE. WITH COOLER AIRMASS IN PLACE HIGH TEMPERATURES ON WEDNESDAY WILL ONLY BE IN THE UPPER 70S TO THE LOWER 80S.
A FEW SHOWERS OR THUNDERSTORMS WILL AGAIN BE POSSIBLE THIS AFTERNOON OVER THE INTERIOR MOUNTAINS OF NORTHWEST CALIFORNIA AS AN UPPER LOW MOVES INLAND. AN AREA OF LOW PRESSURE OVER THE CENTRAL CALIFORNIA COAST IS RAPIDLY WEAKENING AND MOVING INLAND THIS MORNING. LINGERING MOISTURE AND INSTABILITY TODAY WILL ALLOW A FEW MORE SHOWERS AND THUNDERSTORMS TO FORM OVER THE INTERIOR MOUNTAINS BEFORE THIS LOW MOVES COMPLETELY OFF TO THE EAST. ANOTHER UPPER LEVEL TROUGH WILL MOVE TOWARD THE PACIFIC NORTHWEST COAST TONIGHT INTO WEDNESDAY COMPLETELY PUSHING MOISTURE ABOVE THE MARINE LAYER OFF TO THE EAST ENDING THUNDERSTORMS CHANCES WEDNESDAY AFTERNOON.
422 AM EDT TUE JUL 21 2015 HIGH PRESSURE WILL MOVE INTO THE GREAT LAKES AND OHIO VALLEY REGION TODAY BRINGING COOLER TEMPERATURES AND LESS HUMID AIR. SHORT WAVE MOVING ACROSS THE GREAT LAKES THIS MORNING WITH ASSOCIATED COLD FRONT SLOWLY WORKING SOUTH ACROSS OUR LOCAL AREA. ONCE COLD FRONT EXITS THE AREA HIGH PRESSURE WILL BUILD IN WITH SKIES BECOMING MOSTLY SUNNY. COOLER AND LESS HUMID AIR WILL FOLLOW TODAY.
425 AM EDT TUE JUL 21 2015 A COLD FRONT IS EXPECTED TO MOVE THROUGH THE REGION TODAY AND WILL BRING THE CHANCE FOR SHOWERS AND THUNDERSTORMS.
245 AM EDT TUE JUL 21 2015 A COLD FRONT WILL PUSH SOUTHEAST ACROSS CENTRAL PENNSYLVANIA THIS AFTERNOON.
OVERNIGHT LOWS SHOULD BE ABLE TO FALL INTO THE LOW TO MID 60S AS COOLER AIR FINALLY SPILLS INTO THE REGION. WITH MAX READINGS MOSTLY IN THE LOWER 80S ON TAP.
/ISSUED 242 PM CDT MON JUL 20 2015/ LATEST WATER VAPOR CHANNEL LOOP AND GOES DERIVED TPW SHOWS ANOMALOUS MOISTURE FLOWING NORTHWARD ACROSS EASTERN NEW MEXICO ON THE WESTERN EDGE OF UPPER RIDGE. SUBJECTIVE SURFACE ANALYSIS AT 18Z SHOWS A WEAK COLD FRONT/COMPOSITE OUTFLOW ORIENTED NORTHEAST TO SOUTHWEST FROM NEAR WHEELER TO JUST SOUTH OF CANYON. THE TENDENCY OF MID LEVEL HEIGHTS WILL BE TO FALL SLIGHTLY AS UPPER RIDGE DEAMPLIFIES AND THIS SHOULD SUPPORT GREATER COVERAGE OF CONVECTION THAN HAS BEEN SEEN IN PREVIOUS DAYS. STARTING WEDNESDAY MID LEVEL HEIGHTS RISE AS UPPER HIGH BUILDS NORTH/NORTHWESTWARD ONCE AGAIN RESULTING IN DRY WEATHER AND WARMER TEMPERATURES THROUGH AT LEAST THE END OF THE WEEK.
WEAK RIDGING OVER THE NORTHERN ROCKIES AND AN UPPER LOW OVER ONTARIO. WITH THE RIDGE AXIS SHIFTING EAST OF THE MISSOURI RIVER IN THE AFTERNOON ALLOWING FOR RETURN FLOW OF SOUTHERLY WINDS. AND THEN RECOVER TO THE LOW/MID 80S FOR HIGHS ON TUESDAY. THE UPPER PATTERN IS PROJECTED TO BE MORE ACTIVE TO OUR NORTH ACROSS CANADA LOW PRESSURE OVER THE SOUTHEAST. RIDGING IN THE SOUTH CENTRAL. AND ANOTHER TROUGH MOVING ONTO THE PACIFIC COAST. THE PATTERN IS MUCH WEAKER OVER THE CONUS WITH A LOW AMPLITUDE RIDGE OVER THE SOUTHERN/CENTRAL PLAINS. SEVERAL MODELS IN FAIR AGREEMENT IN BRINGING A MID LEVEL TROUGH THROUGH THE RIDGE. WE GO BACK TO SOUTHEAST FLOW WITH HIGH PRESSURE TO THE EAST AND LEE TROUGHING WEST.
644 AM EDT TUE JUL 21 2015 THIN BAND OF MVFR STRATUS ALONG COLD FRONT WILL BE SOUTH OF ALL TERMINALS BY 12-13Z. SLIGHTLY COOLER AIRMASS BEHIND COLD FRONT WILL BRING DAYTIME HIGH TEMPERATURES DOWN TO AROUND 80 DEGREES IN MOST LOCATIONS AND LOWER 80S WITHIN THE URBAN HEAT ISLAND OF METRO DETROIT. THIS RIDGE REMAINS IN PLACE TONIGHT.
AND SEASONAL TEMPERATURES WILL FOLLOW PASSAGE OF A TUESDAY COLD FRONT. A COLD FRONT LATER TODAY WILL RESULT IN ADDITIONAL SHOWERS AND STORMS. HIGH PRESSURE WILL DEVELOP IN THE WAKE OF THE COLD FRONT TO BRING DRY AND SEASONABLY COOL. RESTRICTION CHANCES WILL THEN INCREASE LATE THIS MORNING AND DURING THE AFTERNOON AS A COLD FRONT ADVANCES ON.
313 AM EDT TUE JUL 21 2015 A COLD FRONT WILL CROSS THE AREA LATE TODAY ACCOMPANIED BY SHOWERS AND THUNDERSTORMS.
355 AM EDT TUE JUL 21 2015 THE UPPER RIDGE OVER THE TX/LA REGION WILL GRADUALLY SLIDE WESTWARD DURING THE SHORT TERM AS A TROUGH DEEPENS INTO THE GREAT LAKES AREA.
642 AM EDT TUE JUL 21 2015 A COLD FRONT WILL MOVE SOUTH ACROSS THE AREA THIS MORNING. A LARGE AREA OF HIGH PRESSURE WILL BUILD OVERHEAD ON WEDNESDAY BRINGING A STRETCH OF DRY WEATHER FOR THE SECOND HALF OF THE WEEK.
524 AM EDT TUE JUL 21 2015 A COLD FRONT WILL PUSH SOUTHEAST ACROSS CENTRAL PENNSYLVANIA THIS AFTERNOON.
WE WILL HAVE N/NW WINDS TODAY AS THE COLD FRONT MOVED OUT OF THE HUN CWA THIS MORNING. THE 12Z OHX SOUNDING DISPLAYED DRY AIR IN THE MID LEVELS AND THE UPPER LEVEL RIDGE IN THE ROCKIES WILL ENTRAIN ADDITIONAL DRY AIR INTO THE REGION TODAY. BEHIND THE COLD FRONT.
OVERNIGHT LOWS WILL GENERALLY BE IN THE LOW 70S. ONSHORE FLOW THEN INCREASES THU AS BOUNDARY FADES AND HIGH PRESSURE BUILDS TOWARD THE MID ATLANTIC COAST. LATEST MOS GUIDANCE IS SHOWING LOWER POPS ACROSS THE AREA THROUGH THE PERIOD AS MODELS SHOW SOME DRIER AIR ALOFT WORKING INTO THE REGION AND MID LEVEL RIDGE BUILDS IN ALOFT. HIGHS WILL REACH THE LOW 90S ACROSS THE INTERIOR WED AFT BUT FASTER INLAND MOVEMENT OF THE EAST COAST SEA BREEZE THU LOOK TO LIMIT MAX TEMPS TO UPPER 80S/NEAR 90. RIDGE WITH AXIS NORTH OF THE REGION WEAKENS AS FRONTAL BOUNDARY MOVING THROUGH THE SOUTHEAST STATES STALLS NORTH OF CENTRAL FL. (PREVIOUS DISCUSSION) HIGH PRESSURE RIDGE BUILDING TOWARD THE MID ATLANTIC WILL INCREASE ONSHORE FLOW INTO LATE WEEK.
1238 PM CDT TUE MAY 12 2015 HIGH PRESSURE CENTERED ACROSS KS MOVES EAST INTO MISSOURI TODAY. LOW PRESSURE WILL BEGIN TO ORGANIZE ACROSS THE NRN HIGH PLAINS THIS AFTERNOON. THESE WINDS SHOULD CONTINUE TONIGHT AS THE LOW LEVEL JET FORMS AND STRENGTHENS TO AROUND 50 KT. THE TEMPERATURE FORECAST TODAY FOLLOWS THE WARMER SIDE OF THE MODEL CONSENSUS. A LARGE UPPER TROUGH WILL BE TAKING SHAPE ALONG THE WEST COAST MID TO LATE WEEK.
253 PM EDT TUE MAY 12 2015 A COLD FRONT WILL CROSS THE AREA THIS EVENING.
339 PM EDT TUE MAY 12 2015 COOLER. DRIER AND WINDY CONDITIONS WILL REPLACE OUR RECENT STRETCH OF WARM WEATHER AS A COLD FRONT CROSSES THE COMMONWEALTH THIS AFTERNOON. THE COOLER AND BREEZY CONDITIONS WILL LAST THROUGH WEDNESDAY. AS A LARGE AREA OF HIGH PRESSURE BECOMES CENTERED OVER THE STATE THROUGH WEDNESDAY NIGHT.
A 2ND MID TO UPPER CYCLONE WILL STRENGTHEN AS IT MOVES SE TOWARD. THE STAR OF THE SHOW THIS WEEKEND IS THE STRENGTHENING MID-UPPER CYCLONE MOVING SE. WITH NEGATIVELY-TILTED UPPER RIDGING PUNCHING NW ACROSS THE NORTHERN PLAINS THE CYCLONE WOULD QUICKLY MOVE TOWARD THE NE. KEEPING THE CYCLONE INTACT VS TRANSITIONING IT INTO A NEGATIVELY TILTED UPPER WAVE) CONFIDENCE IS BEGINNING TO INCREASE THAT SEVERE THUNDERSTORMS MAY VISIT THE KS NEIGHBORHOOD FROM SAT THRU SUN WHEN SOUTH-CENTRAL & SOUTHEAST KS ARE PROJECTED TO BE POSITIONED CLOSE TO THE RIGHT ENTRANCE REGION OF A 70-100KT JET MAX.
342 PM CDT TUE MAY 12 2015 THE UPPER LEVEL LOW THAT PRODUCED WIDESPREAD RAINS THE PAST COUPLE OF DAYS IS LOSING ITS GRIP ON THE REGION THIS AFTERNOON. BUT SHOULD DROP RAPIDLY WHERE CLEARING OCCURS REACHING THE LOWER TO MID 30S IN MANY AREAS OF THE MN ARROWHEAD AND NW WISCONSIN. AN UPPER LEVEL RIDGE WILL BE LOCATED ACROSS THE MISSISSIPPI VALLEY AND THE WESTERN GREAT LAKES ON WEDNESDAY NIGHT. ALTHOUGH WAA AND A WARM FRONT LIFTING NORTHWARD SHOULD PROVIDE THE FOCUS FOR SOME LIGHT RAIN ON WEDNESDAY NIGHT. WITH THE LOWEST RAINFALL AMOUNTS EXPECTED IN NW WI.
SHOWERS AND STORMS HAVE BEEN SLOW TO FORM OVER THE HIGHER TERRAIN WHERE DEW POINTS ARE IN THE 20S. AS THESE STORMS MOVE OFF THE HIGHER TERRAIN. A SHORT WAVE TROUGH CURRENTLY OVER BAJA CALIFORNIA WILL LIFT NORTHEAST ACROSS THE REGION ON WEDNESDAY.
333 PM PDT Tue May 12 2015 Cooler and more unsettled conditions expected this week across the interior of NorCal as several weather systems affect the region. An upper level closed low is currently spinning over the California/Oregon border. This showery activity should be diminishing this evening as the upper low moves northeastward. Elsewhere, breezy south to west winds will continue across the forecast area, strongest near the Delta and over the high Sierra.
SOUTH OF THE BOUNDARY THERE HAS BEEN ENOUGH RECOVERY IN THE AIRMASS WITH THE PASSING SHORT WAVE TROUGH THAT STORMS HAVE RE-DEVELOPED ACROSS THE AREA. WATCH WILL GO FROM 09Z WED TO 00Z THUR TO ACCOUNT FOR STORMS FROM C TX MOVING INTO THE AREA OR MORE DEVELOPMENT WITH AN APPROACHING SHORT WAVE TROUGH. TROUGH IS NOW OVER THE BAJA OF MEXICO AND SHOULD TAKE A NE TRAJECTORY OVER TX PANHANDLE AND N TX. THE BULK OF STRONG POS VORT ADVECTION WILL BE NORTH OF THE AREA BUT MODELS STILL DEVELOP QUITE A BIT OF OMEGA WITH THE TROUGH AXIS AND STILL SOME Q VECTOR DIVERGENCE IN 500-300MB LAYER. WHILE THERE IS WEAK RIDGING ALOFT THUR.
354 PM CDT TUE MAY 12 2015 SLOW MOVING COLD FRONT ACROSS THE NORTHERN AREAS. THE COLD FRONT FINALLY SLIDES THROUGH AFTER MIDNIGHT AND WILL CLEAR OUT THE RAIN CHANCES OVERNIGHT.
639 PM EDT TUE MAY 12 2015 A COLD FRONT WILL MOVE EAST OF THE REGION THIS EVENING. HIGH PRESSURE WILL THEN BUILD IN BEHIND THE FRONT AND BRING FAIR WEATHER TO THE AREA THROUGH THE LATTER PORTION OF THE WORKWEEK.
Analysis of the NAM Theta-e field, on the 850mb surface, indicates a Theta-e ridge will move into our counties, from the southwest, tonight. By mid morning tomorrow, the NAM has this ridge centered over West Central Texas.
Radar and Satellite show nuisance mesoscale like disturbances rotating around the edges of a larger area of low pressure centered just to the southwest of Eastern Washington and Northern Idaho this morning. /Pelatti 18Z TAFS: Low pressure remains in the vicinity of the aviation area and steers a number of wet weather disturbances over the TAF sites.
340 PM EDT TUE MAY 12 2015 LOW PRESSURE CROSSING SOUTHERN QUEBEC WILL DRIVE A COLD FRONT THROUGH THE AREA THIS EVENING. ANOTHER COLD FRONT WILL MOVE ACROSS THE REGION WEDNESDAY.
HIGH CLOUDS SHOULD DECREASE SOUTHWEST TO NORTHEAST FROM LATE AFTERNOON THROUGH THE EVENING AS LOW PRESSURE PULLS AWAY. SKIES ARE THEN EXPECTED TO BE MOSTLY CLEAR FOR THE LATTER HALF OF THE NIGHT INTO WEDNESDAY AS HIGH PRESSURE BUILDS OVER THE AREA.
AIRMASS HAS MIXED OUT INLAND WITH LAKE CITY AND HOMERVILLE DEWPOINTS IN THE LOWER 60S. WEAK COLD FRONT WILL BE OVER SE GA IN THE MORNING THEN SLIP SLOWLY SWD INTO NE FL BY THE LATE AFTN HOURS. A WEAK FRONTAL BOUNDARY WILL ESSENTIALLY WASH OUT OVER NORTHERN FLORIDA WEDNESDAY EVENING AS EASTERLY WINDS BEGIN TO BECOME ESTABLISHED ON THE SOUTH SIDE OF A BUILDING HIGH PRESSURE SYSTEM OVER THE MID ATLANTIC.
537 PM EDT TUE MAY 12 2015 LOW PRESSURE CROSSING SOUTHERN QUEBEC WILL DRIVE A COLD FRONT THROUGH THE AREA THIS EVENING. ANOTHER COLD FRONT WILL MOVE ACROSS THE REGION WEDNESDAY.
CONDITIONS WILL DETERIORATE TONIGHT AS LOW-LEVEL MOISTURE CONTINUES TO INCREASE AHEAD OF AN APPROACHING UPPER-LEVEL TROUGH. /ISSUED 428 AM CDT TUE MAY 12 2015/ EARLY MORNING WATER VAPOR SATELLITE IMAGERY SHOWS AN UPPER RIDGE OVER THE ROCKIES AHEAD OF AN UPPER TROUGH NEAR NORTHERN CALIFORNIA. WHERE SURFACE DEW POINTS HAVE CLIMBED INTO THE LOW 40S EARLY THIS MORNING. WITH HIGHS IN THE UPPER 60S TO THE LOWER 70S. IN ADDITION WEAK UPPER RIDGE SHIFTS EASTWARD ALLOWING FOR SOUTHERLY SURFACE WINDS TO CONTINUE THE TRANSPORT OF ABUNDANT LOW-LEVEL MOISTURE INTO THE AREA. GENERALLY WENT WITH WPC GUIDANCE WHERE THE HIGHEST RAINFALL TOTALS WILL BE LOCATED ACROSS THE EASTERN PANHANDLES. WHERE THE CORE OF THE LOW-LEVEL JET WILL SET UP.
1209 PM CDT TUE MAY 12 2015 UPPER LEVEL LOW WILL CONTINUE TO PUSH EASTWARD THROUGH THE DAY TODAY. AS RIDGE SLIDES EAST ON WEDNESDAY.
THE FLORIDA PENINSULA AND THE FLORIDA KEYS LIE ON THE WEST SIDE OF AN UPPER TROPOSPHERIC TROUGH IN THE WESTERN CARIBBEAN. THE AXIS OF THIS TROUGH BISECTS CENTRAL CUBA. THE LOWER TROPOSPHERE CONSISTS OF A BROAD ANTICYCLONIC CIRCULATION ACROSS THE WESTERN ATLANTIC. LIKELY DUE TO THE EASTWARD SHIFTING UPPER LEVEL TROUGH AND THE ASSOCIATED LOST SWATH OF BOUNDARY LAYER MOISTURE CONVERGENCE.
217 PM EDT TUE MAY 12 2015 COOLER. DRIER AND WINDY CONDITIONS WILL REPLACE OUR RECENT STRETCH OF WARM WEATHER AS A COLD FRONT CROSSES THE COMMONWEALTH THIS AFTERNOON. THE COOLER AND BREEZY CONDITIONS WILL LAST THROUGH WEDNESDAY. AS A LARGE AREA OF HIGH PRESSURE BECOMES CENTERED OVER THE STATE THROUGH WEDNESDAY NIGHT.
The cold front has finally begun to make its way through the area this morning. Temperatures today will be quite a bit cooler than the past few days, topping out in the upper 60s to mid 70s. High pressure will continue to build in from the north ans west tonight and remain in control over the region Wednesday.
213 PM MDT TUE MAY 12 2015 WARMER. THE UPPER RIDGE CURRENTLY OVER THE HIGH PLAINS MOVES OVER THE EASTERN UNITED STATES WHILE ANOTHER LOW CENTER DIVES SOUTH ALONG THE WEST COAST TONIGHT THROUGH WEDNESDAY. THE SOUTHWEST FLOW ALOFT PULLS AN OPEN TROUGH OUT OF NORTHERN MEXICO TONIGHT AND LIFTS IT OUT ACROSS THE CENTRAL HIGH PLAINS REGION BY LATE WEDNESDAY THROUGH WEDNESDAY NIGHT. EXPECT THE INCOMING UPPER TROUGH TO HELP SPARK OFF SHOWERS AND THUNDERSTORMS THAT WILL BEGIN TO THE SOUTHWEST OF THE FORECAST AREA ON WEDNESDAY AND MOVE INTO THE REGION AND BECOME MORE WIDESPREAD THROUGH LATE DAY WEDNESDAY AND INTO THE EVENING AND OVERNIGHT HOURS THAT WILL ALSO BE AIDED BY THE MOIST SOUTHERLY LOW LEVEL JET.
300 PM EDT TUE MAY 12 2015 A COLD FRONT WILL APPROACH FROM THE NORTHWEST TONIGHT AND MOVE OFFSHORE WEDNESDAY MORNING. HIGH PRESSURE WILL BUILD IN FROM THE NORTH THROUGH THE END OF THE WEEK AND LINGER INTO THE WEEKEND. COLD FRONT WILL PUSH THROUGH THE FA BETWEEN 06-12Z WITH WINDS BECOMING NORTHERLY AND DRIER AIR INFILTRATING WITH CLEARING SKIES.
626 PM EDT TUE MAY 12 2015 A SECONDARY COLD FRONT WILL WILL SWEEP ACROSS EASTERN LAKE ERIE OVERNIGHT.
209 PM CDT TUE MAY 12 2015 RATHER BENIGN FORECAST PERIOD WITH A BROAD WESTWARD TILTED HIGH PRESSURE RIDGE AND SUBSIDENCE ALOFT ACROSS THE WFO PAH FORECAST AREA. THE CANADIAN, NAM-WRF, AND EUROPEAN APPEARED TO INITIALIZE WELL WITH THE CLOSED LOW ALONG THE WESTERN OREGON/WASHINGTON STATE BORDER.
419 PM EDT TUE MAY 12 2015 A COLD FRONT WILL APPROACH FROM THE NORTHWEST TONIGHT AND MOVE OFFSHORE WEDNESDAY MORNING. HIGH PRESSURE WILL BUILD IN FROM THE NORTH THROUGH THE END OF THE WEEK AND LINGER INTO THE WEEKEND. COLD FRONT WILL PUSH THROUGH THE FA BETWEEN 06-12Z WITH WINDS BECOMING NORTHERLY AND DRIER AIR INFILTRATING WITH CLEARING SKIES. THEN UPR RIDGE WILL GRADUALLY BREAK DOWN WITH BACKDOOR COLD FRONT TRYING TO MOVE IN MON-TUE. RIDGING SFC AND ALOFT WILL RESULT IN FAIR AND DRY CONDITIONS DURING PERIOD.
An upper level low over central Oregon has caused the development of showers and thunderstorms this afternoon over north central Idaho and southwest Montana. By later tonight, the upper level low is expected to move into the Idaho Panhandle and track north.
243 PM EDT TUE MAY 12 2015 A COLD FRONT WILL CROSS THE AREA THIS EVENING. DRY WEATHER RETURNS THROUGH THE MIDDLE OF THE WEEK UNDER HIGH PRESSURE. THE COLD FRONT WILL PUSH ACROSS THE AREA OVERNIGHT WITH COOLER AND DRIER AIR BUILDING IN FROM THE NORTHWEST AS HIGH PRESSURE BUILDS DOWN FROM THE OHIO VALLEY. PLENTY OF SUN AND LESS HUMID CONDITIONS ARE EXPECTED ON WEDNESDAY WITH MAX TEMPERATURES ABOUT 10 DEGREES COOLER THAN TODAY IN THE LOWER 80S AND NO CHANCE OF RAIN DUE TO DRIER AIR.
117 PM EDT TUE MAY 12 2015 THE CENTER OF A MIDLEVEL LOW PRESSURE CIRCULATION IS TRACKING ACROSS THE LOWER PENINSULA THIS AFTERNOON. TODAY AND TONIGHT MUCH COOLER. DAY EXPECTED TODAY AS UPPER LOW OPENS INTO A BROAD UPPER TROUGH AS IT CROSSES THE GREAT LAKES. WEST TO SOUTHWEST WINDS AROUND THIS LOW WILL BE RATHER GUSTY.
AN AREA OF LOW PRESSURE OVER SOUTHERN OREGON WILL CONTINUE TO DRIFT EAST THIS AFTERNOON AND EVENING THEN MOVE NORTH OVER EASTERN WASHINGTON LATE TONIGHT AND WEDNESDAY. MOISTURE FROM THIS LOW WILL SPIN UP RESULTING IN AN INCREASED CHANCE FOR SHOWERS.
301 PM EDT TUE MAY 12 2015 A COLD FRONT WILL CROSS THE AREA THIS EVENING.
322 PM EDT TUE MAY 12 2015 A COLD FRONT WILL MOVE EAST ACROSS THE MID-ATLANTIC LATE THIS AFTERNOON INTO THE EVENING.
350 PM EDT TUE MAY 12 2015 A COLD FRONT WILL MOVE EAST OF THE REGION THIS EVENING. HIGH PRESSURE WILL THEN BUILD IN BEHIND THE FRONT AND BRING FAIR WEATHER TO THE AREA THROUGH THE LATTER PORTION OF THE WORKWEEK.
339 PM EDT TUE MAY 12 2015 UPPER AIR PATTERN CONSISTS OF A CLOSED 500 MB LOW OVER SOUTHERN OREGON WITH A TROUGH OVER THE UPPER GREAT LAKES THIS MORNING. THE TROUGH OVER THE UPPER GREAT LAKES CONTINUES TO MOVE AWAY THIS FORECAST PERIOD. AS THE TROUGH MOVES AWAY FROM THE AREA. WITH THE 500MB RIDGE BUILDING IN ALOFT.
224 PM EDT TUE MAY 12 2015 HIGH PRESSURE BRINGS NEAR NORMAL TEMPERATURES FOR MID WEEK.
149 PM EDT TUE MAY 12 2015 A COLD FRONT WILL CONTINUE TO MOVE THROUGH THE AREA EARLY THIS MORNING.
126 PM EDT TUE MAY 12 2015 A COLD FRONT WILL MOVE ACROSS THE REGION TODAY. HIGH PRESSURE WILL THEN BUILD IN BEHIND THE FRONT AND BRING FAIR WEATHER TO THE AREA THROUGH THE LATTER PORTION OF THE WORKWEEK.
A DEEP UPPER TROUGH OF LOW PRESSURE OVER THE WEST COAST WAS DRAWING MOISTURE UP ACROSS OLD MEXICO. FEEL THAT STEADILY INCREASING CLOUD COVER AND PCPN CHANCES FOR THE HIGHER ELEVATIONS THIS EVE AND OVERNIGHT LOOKS REASONABLE.
1230 PM CDT Tue May 12 2015 High pressure was centered over the central Plains and influencing the weather across the Ozarks early this morning. Clear conditions and cooler temperatures in the 40s to low 50s and dew points in the low to mid 40s. For today and tonight, tranquil conditions are expected as high pressure at the surface moves across the region from the central Plains while upper ridging builds in from the west-southwest. Temperatures today should be similar to yesterday, albeit slightly cooler in the eastern Ozarks with readings generally in the mid to upper 60s and approaching the low 70s out west.
147 PM PDT TUE MAY 12 2015 COOLER WITH GUSTY WEST WINDS IN THE MOUNTAINS AND DESERTS THIS AFTERNOON AND EVENING AS A WEAK TROUGH MOVES THROUGH THE REGION.
AND WEDNESDAY SHARP UPPER TROUGH WILL MOVE ACROSS WISCONSIN TODAY WITH SCATTERED SHOWERS THROUGH NOON. CLOUDY SKIES AND BLUSTERY WINDS WILL MAKE FOR A COOLER DAY WITH HIGHS ABOUT 15 DEGREES BELOW NORMAL.
320 PM CDT TUE MAY 12 2015 QUIET AFTERNOON ACROSS MIDDLE TENNESSEE TODAY IN THE WAKE OF THE COLD FRONT THAT MOVED THROUGH THE REGION. OTHERWISE NOT MUCH TO SPEAK OF TODAY BESIDES THE COOLER HIGH TEMPERATURES THAT ARE QUITE PLEASANT IN THE LOW TO MID 70S. HIGH TEMPERATURES IN THE 70S LOOK TO CONTINUE TOMORROW AS WELL BEFORE AN APPROACHING TROUGH WEDNESDAY AMPLIFIES THE RIDGE OVER THE REGION AND BRINGS MORE WARM AIR BACK TO MIDDLE TENNESSEE. AS THE TROUGH MOVES CLOSER TO THE AREA FROM THE WEST.
353 PM EDT TUE MAY 12 2015 A SECONDARY COLD FRONT WILL WILL SWEEP ACROSS EASTERN LAKE ERIE OVERNIGHT.
259 PM CDT Tue May 12 2015 A beautiful day is underway this afternoon across the region, as cool and dry high pressure slowly slides east across the area.
BEST POTENTIAL REMAINS TO THE NORTHWEST WHERE IMPULSES FROM SLOW-MOVING TROUGH OUT TO THE WEST WILL IMPACT THE AREA. TEMPERATURES WILL BE ON THE COOLER SIDE AGAIN ON WEDNESDAY.
/ISSUED 1122 AM CDT TUE MAY 12 2015/ TO BUMP HIGHS A BIT SOUTH AND TWEAK WINDS LIGHT OVERRUNNING TYPE RAIN SHOWERS COULD THUNDER HERE OR THERE AS AN UPPER LOW OVER CENTRAL TEXAS DRIFTS NORTHEAST WHILE SHEARING OUT.
THE UPPER LEVEL TROUGH CURRENTLY OVER OUR REGION IS PRODUCING NUMEROUS SHOWERS OVER NEARLY THE ENTIRE FORECAST AREA. THESE SHOWERS, ALONG WITH A POSSIBLE ISOLATED THUNDERSTORM, WILL CONTINUE THROUGH THIS EVENING, THEN DIMINISH OVERNIGHT AS THE TROUGH SHIFTS OFF TO THE NORTHEAST. THE BREAK WILL BE SHORT LIVED HOWEVER, AS ANOTHER CLOSED LOW IS EXPECTED TO DROP SOUTH FROM THE GULF OF ALASKA, PASSING BY JUST OFF THE COAST OF THE PACIFIC NORTHWEST BY WEDNESDAY NIGHT. A SHORT WAVE ORBITING THIS LOW WILL PASS OVER THE FORECAST AREA WEDNESDAY AFTERNOON AND EVENING, AND THIS HAS THE POTENTIAL TO PRODUCE MORE SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS, ESPECIALLY OVER THE HIGHER TERRAIN SUCH AS THE CASCADES AND SISKIYOUS.
154 PM EDT TUE MAY 12 2015 WINDY CONDITIONS CAN BE EXPECTED THIS AFTERNOON IN THE WAKE OF A COLD FRONT THAT BROUGHT COOLER AND DRIER AIR TO THE REGION LAST NIGHT.
PARTLY CLOUDY SKIES WILL CONTINUE TO CLEAR THROUGH THE AFTERNOON AND EVENING AS HIGH PRESSURE BEGINS TO BUILD IN TO THE AREA. HIGH PRESSURE REMAINS WITH MOSTLY CLEAR SKIES AND TEMPS NEAR NORMAL FOR THIS TIME OF YEAR.
354 PM EDT TUE MAY 12 2015 LOW PRESSURE WILL CONTINUE ACROSS QUEBEC TONIGHT BRINGING A COLD FRONT INTO THE AREA. THE COLD FRONT WILL PUSH THROUGH THE REGION WEDNESDAY MORNING AND OFF THE COAST.
150 PM MDT TUE MAY 12 2015 WARMER. THE UPPER RIDGE CURRENTLY OVER THE HIGH PLAINS MOVES OVER THE EASTERN UNITED STATES WHILE ANOTHER LOW CENTER DIVES SOUTH ALONG THE WEST COAST TONIGHT THROUGH WEDNESDAY. THE SOUTHWEST FLOW ALOFT PULLS AN OPEN TROUGH OUT OF NORTHERN MEXICO TONIGHT AND LIFTS IT OUT ACROSS THE CENTRAL HIGH PLAINS REGION BY LATE WEDNESDAY THROUGH WEDNESDAY NIGHT. EXPECT THE INCOMING UPPER TROUGH TO HELP SPARK OFF SHOWERS AND THUNDERSTORMS THAT WILL BEGIN TO THE SOUTHWEST OF THE FORECAST AREA ON WEDNESDAY AND MOVE INTO THE REGION AND BECOME MORE WIDESPREAD THROUGH LATE DAY WEDNESDAY AND INTO THE EVENING AND OVERNIGHT HOURS THAT WILL ALSO BE AIDED BY THE MOIST SOUTHERLY LOW LEVEL JET.
ZONAL FLOW ALOFT WITH A CLOSED MID LEVEL LOW OVER FAR SOUTH CENTRAL CANADA AND A RIDGE AXIS STRETCHING FROM THE CENTRAL PLAINS NORTHWEST INTO SOUTHERN MONTANA. WARM FRONTAL BOUNDARY NOW OVER SOUTHERN SOUTH DAKOTA WILL LIFT SLOWLY NORTH LATER TONIGHT INTO WEDNESDAY. ALONG THE WARM FRONT MUCAPE 500-1200 J/KG WILL SLOWLY CREEP INTO MY FAR SOUTHWEST AND FAR SOUTH CENTRAL COUNTIES.
231 PM CDT TUE MAY 12 2015 AREA OF STRATOCUMULUS PULLING AWAY EARLY THIS AFTERNOON AS UPPER LOW ADVANCES ACROSS NORTHERN MICHIGAN. BUT THIS WILL BE SETTLING DOWN BY 6 PM AS A NARROW HIGH PRESSURE RIDGE ADVANCES EAST INTO THE MISSISSIPPI VALLEY. WINDS TO GRADUALLY TURN NORTH AND THEN NORTHEAST OVERNIGHT WITH THE PASSAGE OF THIS RIDGE. HAVE MADE LITTLE CHANGE TO THE LOWS TONIGHT. THEN, ATTENTION TURNS TO THE RELOADING TROF ALONG THE WEST COAST OF THE U.