Aikyam-Lab/Synoptic-Bench huggingface dataset:
333 PM CDT TUE APR 21 2015 COLD UPPER TROUGH MOVING ACROSS SOUTHEAST MINNESOTA INTO THE EVENING HOUR. STILL HAVE STRONG GRADIENT WINDS OVER THE AREA FOR WEDNESDAY AS HIGH PRESSURE BUILDS EAST FROM THE DAKOTAS. SHOULD SEE SUNSHINE OVER MOST OF MINNESOTA AND BECOMING MOSTLY SUNNY INTO WESTERN WISCONSIN DURING THE DAY AS THE UPPER TROUGH FINALLY DEPARTS TO THE EAST.
245 PM CDT TUE APR 21 2015 THE 19Z SURFACE ANALYSIS INDICATED THAT A DECENT RIDGE OF HIGH PRESSURE WAS CENTERED OVER WEST CENTRAL MISSISSIPPI. WILL TREND TOWARD THE SLIGHTLY COOLER NAM TEMPS FOR OVERNIGHT LOW TEMPS. A COLD FRONT IS PROGGED BY THE MODELS TO PROGRESSIVELY MOVE SOUTHEAST FROM THE MIDWEST INTO THE LOWER OHIO VALLEY OVERNIGHT AND INTO MIDDLE TENNESSEE BY 18Z WEDNESDAY.
DUE TO UPPER LEVEL RIDGE BUILDING IN FROM THE SOUTH WILL SERVE TO INCREASE CONVECTIVE INHIBITION. AN UPPER LOW CURRENTLY OVER SOUTHERN CA WILL CONTINUE TO CARVE DEEPER OVER THE BAJA PENINSULA THROUGH WEDNESDAY.
650 PM EDT TUE APR 21 2015 UPPER LEVEL LOW PRESSURE IS EXPECTED TO KEEP COOL AND UNSETTLED WEATHER THROUGH MUCH OF THE WEEK. THE MAIN UPPER TROUGH WILL START TO SAG FARTHER SOUTHEASTWARD FROM HUDSON BACK TOWARD EASTERN ONTARIO.
147 PM CDT TUE APR 21 2015 FORECAST REMAINS ON TRACK FOR THE REMAINDER OF THE AFTERNOON AS WEAK HIGH PRESSURE CONTINUES TO BUILD ACROSS WESTERN AND CENTRAL NORTH DAKOTA. WINDS WILL AGAIN BE A CONCERN OVER THE JAMES RIVER VALLEY REGION TODAY AS PRESSURE GRADIENT REMAINS TIGHT WHILE HIGH PRESSURE SETTLES IN OVER THE WEST KEEPING CONDITIONS MUCH CALMER. THIS WILL AGAIN BRING FIRE WEATHER CONCERNS TO THE JAMES RIVER VALLEY REGION GIVEN THE LOW HUMIDITY VALUES EXPECTED AGAIN TODAY. A NORTHWEST FLOW ALOFT WILL PERSIST THROUGH THE MIDDLE OF THE WEEK WITH A QUASI-BLOCKING PATTERN IN PLACE.
110 PM EDT TUE APR 21 2015 HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH WEDNESDAY MORNING.
HIGH PRESSURE BUILDING OFF THE SOUTHEAST U. PRECIP CHANCES FALL TO A SILENT 10PCT FRI AS MID LVL RIDGING REBUILDS AN H85-H70 THERMAL CAP OVER CENTRAL FL. (MOD PREV EXTENDED DISC) A TRANSITORY RIDGE OVER THE GULF BUILDS EWD OVER THE REGION INTO THE WEEKEND. HIGH PRESSURE BUILDING TOWARD AND EVENTUALLY OFFSHORE THE SOUTHEAST U. FAVORABLE CONDS OVER THE OPEN WATERS AS A PROGRESSIVE WEATHER PATTERN OVER THE SOUTHERN STATES MAINTAINS A WEAK RIDGING PATTERN OVER THE FL STRAITS. THE MEANDERING RIDGE WILL PRODUCE A LOOSE PGRAD THAT GENERATE WEAK SFC/BNDRY LYR FLOW THRU THE WEEKEND.
410 PM EDT TUE APR 21 2015 A COLD FRONT WILL SWEEP ACROSS THE AREA WEDNESDAY.
1236 PM CDT TUE APR 21 2015 AN ARCTIC COLD FRONT ACROSS NORTH DAKOTA WILL BACK INTO THE FCST AREA THIS AFTN PRODUCING SOME CLOUDINESS. BY 12Z WEDNESDAY A SMALL AREA OF HIGH PRESSURE HAS SETTLED OVER NCNTL NEB WHICH SHOULD PRODUCE LOWS IN THE 20S. THE MODELS SUGGEST ANY CLOUD COVER WOULD LIE ACROSS THE PANHANDLE AND SOUTHWEST NEB WHICH WOULD HOLD UP LOWS IN THE LOWER 30S. THE RADAR RETURNS ACROSS NORTH DAKOTA MOVE EAST OF THE FCST AREA IN THE NAM MODEL WHILE THE HRRR SHOWS TOO MUCH DRY AIR IN THE LOWER LEVELS FOR ANYTHING MORE THAN SPRINKLES THIS AFTN AND TONIGHT. MEANWHILE AN UPPER LEVEL LOW LIFTS TOWARDS THE DESERT SW.
143 PM EDT TUE APR 21 2015 HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH WEDNESDAY MORNING.
148 PM EDT TUE APR 21 2015 UPPER AIR PATTERN CONSISTS OF A 500 MB LOW OVER THE UPPER GREAT LAKES EMBEDDED IN A TROUGH ACROSS THE GREAT LAKES REGION. LOOKS LIKE THERE COULD BE SOME INSTABILITY SHOWERS TODAY WITH THE UPPER LOW OVERHEAD AND ALSO A LAKE BREEZE CONTRIBUTION IN THE EASTERN CWA WHICH WILL ENHANCE THE SHOWERS AND THIS WAS ALREADY COVERED IN THE POPS. NORTHWEST LAKE EFFECT SNOW BELTS WILL HAVE THE HIGHEST POPS FOR THIS FORECAST PERIOD AND THERE WILL BE SOME ACCUMULATING SNOW ON THE GRASS THIS FORECAST PERIOD WITH 2 INCHES IN THE WEST FOR TODAY AND UP TO 3 INCHES TONIGHT.
GUSTY WINDS CAN BE EXPECTED WEDNESDAY BUT NOT AS STRONG AS TODAY BEFORE THE LOW FINALLY MOVES OFF AND ALLOWS HIGH PRESSURE TO BUILD IN.
356 PM EDT TUE APR 21 2015 HIGH PRESSURE WILL PREVAIL TONIGHT THROUGH WEDNESDAY.
LOW PRESSURE SYSTEM OVER SOUTHEAST ONTARIO. BUT WINDS SHOULD BE CONSIDERABLY LIGHTER THAN TODAY AS THE LOW TO THE NORTHEAST BEGINS TO WEAKEN AND SHIFT EASTWARD. DESPITE TEMPERATURES DROPPING INTO THE LOWER TO MID 30S. A LIGHT FREEZE IS LIKELY ALONG THE NORTH OF THE HIGHWAY 30 CORRIDOR. BUT WITH COLD ALOFT AND THE HIGH PRESSURE RIDGE REMAINING JUST WEST OF THE CWA. MODELS IN THE EXTENDED REMAIN FOCUSED ON A SLOWLY PROGRESSING DEEP TROF.
113 PM EDT TUE APR 21 2015 HIGH PRESSURE BUILDS OVER THE REGION THROUGH WEDNESDAY.
1245 PM CDT TUE APR 21 2015 UPPER LOW WAS PARKED NEAR THE ARROWHEAD OF MN EARLY THIS AM WITH CWA RESIDING IN COOL NORTHWEST FLOW. CLOSED LOW WILL MEANDER SLOWLY EASTWARD THROUGH THE GREAT LAKES NEXT 24 HOURS WITH CWA REMAINING IN COOL NORTHWEST FLOW. COULD ALSO SEE A FEW PM SHOWERS NEAR/NORTH OF HWY 20 CORRIDOR WITH SPOKE OF ENERGY SHEARING ON BACKSIDE OF UPPER LOW.
A PASSING WAVE IN THE MEAN BROAD CYCLONE'S TROF WILL ALLOW FRONTOGENETIC FORCING/ASSOCIATED POPS TO REDEVELOP AND SPREAD ALONG THE LOWER OHIO RIVER VALLEY LATER TODAY-TONIGHT. SO POPS WILL END WEST TO EAST AS HIGH PRESSURE BUILDS ACROSS THE MIDDLE AND UPPER MISSISSIPPI VALLEY AT THE SURFACE. SOME DIRTY OVERRUN OF THE HIGH FROM THE SOUTH MAY WARRANT A SMALL CHANCE POP REAPPEARANCE THERE WED NIGHT. OTHERWISE WE'LL CLOSE OUT THE SHORT TERM MAINLY DRY/UNDER THE INFLUENCE OF THE HIGH.
147 PM MDT TUE APR 21 2015 THE SHORT TERM FORECAST CHALLENGE IS THE VERY SLIGHT CHANCE OF PRECIPITATION THAT TRANSITIONS THE FORECAST AREA AS A COLD FRONT SAGS SOUTH-SOUTHWESTWARD ACROSS THE REGION TONIGHT. EXPECT THE COLD FRONT CURRENTLY OVER NORTHERN NEBRASKA TO PUSH SOUTH ACROSS THE CENTRAL HIGH PLAINS AND ACROSS THE FORECAST AREA BETWEEN 03Z-09Z TONIGHT. HAVE COOLED OFF THE HIGH TEMPERATURES OVER THE NORTHEAST SECTIONS BY AROUND 10 DEGREES FROM TODAY TO TOMORROW WHILE THE WESTERN SECTIONS MAY ONLY BE AROUND 5 DEGREES COOLER.
CURRENTLY THERE IS A LEE TROUGH IN EASTERN NEW MEXICO AND VISIBLE SATELLITE IS SHOWING SOME CUMULUS CLOUDS IN ASSOCIATION WITH THIS. A COLD FRONT THAT IS CURRENTLY IN NORTHERN NEBRASKA IS MAKING ITS WAY SOUTH AND SHOULD BE THROUGH THE OKLAHOMA PANHANDLE BY MORNING. THE LOW LEVEL JET WILL STRENGTHEN TONIGHT WITH THE NOSE OF IT OVER THE NORTHEAST PANHANDLES. EXPECT MIN TEMPS TO BE WARMER THAN LAST NIGHT. UPPER RIDGING WILL BUILD IN ALOFT AHEAD OF AN UPPER LOW MOVING INTO CALIFORNIA. A COLD FRONT WILL STALL IN THE VICINITY WITH WARM. FORCING ALONG THE FRONT AND DRYLINE THAT IS EXPECTED TO REMAIN OVER THE HIGHER TERRAIN IN NEW MEXICO CAN LEAD TO THE DEVELOPMENT OF STORMS IN THE AFTERNOON AND EVENING.
HIGH PRESSURE OVER MS WAS EXTENDING A DRY AIRMASS INTO THE CENTRAL COUNTIES. A MORE HUMID AIRMASS OVER SOUTH TEXAS WAS MOVING AROUND THE RIDGE AS SEEN BY THE SURFACE DEWPOINTS INTO THE MID 60S AT KPSX.
343 PM EDT TUE APR 21 2015 HIGH PRESSURE WILL BUILD OVER THE AREA THROUGH WEDNESDAY MORNING.
335 PM EDT TUE APR 21 2015 A BROAD AREA OF LOW PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER OVER THE GREAT LAKES OVER THE NEXT COUPLE OF DAYS. THIS WEATHER SYSTEM WILL SUPPORT COOLER THAN NORMAL TEMPERATURES AND THE CHANCE FOR SOME ON AND OFF RAIN SHOWERS. THE MODEL SOUNDINGS FOR EARLY THIS EVENING CONTINUE TO SHOW THE INVERTED V SIGNATURE INDICATIVE OF DRIER AIR AT THE LOW LEVELS. THE UPPER LOW WILL MEANDER AND WEAKEN OVER THE NEXT FEW DAYS.
349 PM CDT TUE APR 21 2015 LATEST SURFACE ANALYSIS PLACES AN AREA OF HIGH PRESSURE OVER THE GULF COAST STATES WITH A COLD FRONT STREWN ACROSS THE IOWA AND MISSOURI BORDERS AND BACK THROUGH NEBRASKA.
327 PM MDT TUE APR 21 2015 A CLOSED LOW AT H7 OVER SOCAL WILL SPIN SOME ENERGY TOWARD THE 4 CORNERS TONIGHT. BUT A FEW SHOWERS MAY PERSIST OVER THE HIGHER TERRAIN OF SOUTHEAST UTAH THROUGH THE NIGHT. SHORT WAVE ROTATING NORTHWARD AHEAD OF SRN CALIF CLOSED LOW CIRCULATION GETS STRETCHED. WITH THE HIGHEST CHANCE OVER THE SAN JUAN MOUNTAINS.
KEEPING THE GREAT LAKES REGION IN A TROUGHING PATTERN WITH BLOCKING OVER THE NORTH ATLANTIC SLOWING THE EASTERN PROGRESSION TO THE TROUGH. LOWS COULD EASILY DIP TO THE LOW/MID 30S WITH POSSIBLE FROST FORMATION. IT APPEARS SFC RIDGING SHUD LINGER THRU MUCH OF FRI.
343 PM CDT Tue Apr 21 2015 Upper level low remains over the Great Lakes region inching its way eastward tonight and tomorrow. A small disturbance moves down the western flank of the upper level low into Iowa this evening helping to push a cold front through our region. With this frontal passage, winds will veer north and high pressure will begin to nose in ending chances for additional storm development. Tomorrow, high pressure moves just east of the area and allows for clearer skies and northerly winds. Highs will be much cooler than today topping out in the upper 50s/low 60s.
TONIGHT AND WEDNESDAY AN SLOW MOVING UPPER LEVEL LOW WILL CONTINUE TO DOMINATE THE WEATHER FOR TONIGHT AND WEDNESDAY. NUMEROUS SHOWERS DEVELOPED THIS AFTERNOON AS A DEEP UPPER LEVEL TROUGH SAT OVER THE GREAT LAKES REGION. THIS TROUGH IS FORECASTED TO MEANDER SIGHTLY EAST BY WEDNESDAY AFTERNOON. SHOWERS ARE EXPECTED AGAIN WEDNESDAY AFTERNOON BUT SHOULD NOT BE AS NUMEROUS AS WHAT WE SAW TODAY AS MID LEVEL INSTABILITY WILL BE WEAKER WITH THE MAIN UL TROUGH DRIFTING EAST. WEDNESDAY NIGHT THROUGH TUESDAY THE UPPER LEVEL LOW WILL MOVE SLOWLY FROM SOUTHERN ONTARIO TO NORTHERN NEW ENGLAND BY THE END OF THE WEEK.
314 PM EDT TUE APR 21 2015 DRY HIGH PRESSURE WILL HOLD OVER THE CWA THROUGH TONIGHT. HOWEVER THE NEXT SHORT WAVE AND ASSOCIATED COLD FRONT OVER THE MIDWEST WILL SPREAD MID AND HIGH LEVEL CLOUDS OVER THE REGION LATE TONIGHT AND WEDNESDAY.
145 PM EDT TUE APR 21 2015 A TROUGH/SECONDARY COLD FRONT WILL MOVE ACROSS THE AREA LATE TODAY USHERING IN MUCH COOLER CONDITIONS.
317 PM CDT TUE APR 21 2015 WV IMAGERY THIS AFTN REVEALING LARGE LOW PRESSURE SITUATED OVER THE GREAT LAKES REGION. A DOWNSTREAM WELL AMPLIFIED RIDGE OVER THE WRN CONUS. AND THE FEATURE BEING CLOSED LOW CURRENTLY CENTERED OVER SRN CA.
151 PM EDT TUE APR 21 2015 A COLD FRONT WILL SWEEP ACROSS THE AREA WEDNESDAY.
MOISTURE AND FORCING SEEMS TO BE LIMITED AND ANY STORMS THAT FORM WILL BE ISOLATED AND COMING OFF THE HIGHER TERRAIN IN NEW MEXICO OR INITIATING ALONG THE LEE TROUGH AXIS. A SFC TROF OF LOW PRESSURE WILL ORIENT ITSELF ALONG THE NM AND TX STATE LINE THIS AFTERNOON. WHICH WILL LIKELY IMPINGE ON A SWD MOVG COLD FRONT. WITH MINOR DIFFERENCES ON COLD FRONTAL TIMING. SFC COLD FRONT WILL SETTLE TO A POSITION JUST SOUTH AND WEST OF THE FCST AREA ON WEDNESDAY.
418 PM CDT TUE APR 21 2015 HIGH PRESSURE OVER THE AREA TODAY HAS ALLOWED TEMPERATURES TO CLIMB INTO THE MID TO UPPER 70S AS WINDS HAVE SHIFTED OUT OF THE SOUTHEAST. THE LOW COMBINED WITH DAYTIME HEATING AND MOISTURE WILL UNFORTUNATELY SUPPORT STORM DEVELOPMENT.
THUS HAVE BOOSTED OUR POPS SOME THIS AFTERNOON ALONG AND WEST OF INTERSTATE 25 CLOSER TO BETTER PROGGED UPWARD VERTICAL MOTION AND THE 850/700 MB THETA-E RIDGE AXIS.
A LARGE UPPER LEVEL LOW CURRENTLY OVER THE GREAT LAKES WILL SLOWLY MOVE NORTHEAST INTO EASTERN CANADA TONIGHT INTO TOMORROW WITH AN UPPER LEVEL RIDGE BUILDING INTO THE ROCKIES. WINDS WILL SHIFT TO THE NORTHEAST BEHIND THIS FRONT THEN TO MORE OF AN EASTERLY DIRECTION TOMORROW AS HIGH PRESSURE BUILDS INTO THE AREA. LOWS TONIGHT LOOK TO RANGE FROM THE LOWER TO MID 40S WITH HIGHS TOMORROW ONLY REACHING INTO THE LOWER TO MID 60S. MEANWHILE, ANOTHER DEEP UPPER LEVEL TROUGH WILL BE SITUATED OFF THE COAST OF SOUTHERN CALIFORNIA.
A RIDGE OF HIGH PRESSURE WILL CONTINUE OVER THE NORTHERN ROCKIES THROUGH TONIGHT. A COLD FRONT WILL BE SWINGING THROUGH THE AREA ON WEDNESDAY.
453 PM MDT TUE APR 21 2015 A CLOSED LOW AT H7 OVER SOCAL WILL SPIN SOME ENERGY TOWARD THE 4 CORNERS TONIGHT. BUT A FEW SHOWERS MAY PERSIST OVER THE HIGHER TERRAIN OF SOUTHEAST UTAH THROUGH THE NIGHT. SHORT WAVE ROTATING NORTHWARD AHEAD OF SRN CALIF CLOSED LOW CIRCULATION GETS STRETCHED. WITH THE HIGHEST CHANCE OVER THE SAN JUAN MOUNTAINS.
ISSUED BY NATIONAL WEATHER SERVICE RAPID CITY SD 356 PM CDT TUE APR 21 2015 THE LATEST WATER VAPOR IMAGES SHOWED A LARGE UPPER LOW OVER THE GREAT LAKES. A CUTOFF LOW OVER SWRN CALIFORNIA WITH A RIDGE ABOVE THAT OVER THE NWRN CONUS. AND THEN A TROUGH OFF THE WEST COAST. AND THIS WAS PUSHING A COLD FRONT INTO NRN SECTIONS OF THE FORECAST AREA. WITH SOME MIDLEVEL CLOUDS FARTHER TO THE NORTHEAST IN ASSOCIATION WITH THE UPPER TROUGH. BUT THE UPPER LOW MOVES A LITTLE EAST. SLIGHT WARM ADVECTION AT 850MB IN RESPONSE TO A BUILDING THERMAL RIDGE TO THE WEST SHOULD ALLOW FOR HIGH TEMPS TO REACH AROUND 60.
1123 AM PDT TUE APR 21 2015 Today will likely be the warmest day in the next 7 to 10 days as strong high pressure remains over the region for one last day. A cold front will arrive Tuesday night bringing cooler weather and breezy conditions into Wednesday.
116 PM EDT TUE APR 21 2015 HIGH PRESSURE WILL BUILD IN TODAY THROUGH WEDNESDAY.
TEMPERATURES WILL BE NEAR NORMAL TO SLIGHTLY ABOVE NORMAL WITH LOWS TONIGHT RANGING FROM THE UPPER 50S FAR NORTH TO THE LOWER 70S NEAR THE COAST FROM AROUND TAMPA BAY SOUTHWARD WITH DAYTIME HIGHS ON WEDNESDAY MOSTLY IN THE MID TO UPPER 80S.
LARGE UPPER TROUGH WILL CONTINUE TO DOMINATE THE FORECAST PERIOD. AN APPROACHING WAVE AND COLD FRONT WILL RETURN THE CHANCE FOR SHOWERS BY LATE TONIGHT/EARLY WEDNESDAY. A FAIRLY PROUNCED SHORT WAVE TROUGH WILL CONTINUE TO PUSH INTO AND THROUGH THE AREA ON WEDNESDAY. THE MAIN UPPER TROUGH WILL START TO SAG FARTHER SOUTHEASTWARD FROM HUDSON BACK TOWARD EASTERN ONTARIO.
ISOLATED COASTAL SHOWERS WILL BE POSSIBLE AS A WEAK COASTAL TROUGH DEVELOPS. A WARM FRONT WILL MOVE ACROSS DEEP SOUTH TEXAS LATER TODAY. THE COMBINATION OF INCREASING DEWPOINTS AND PRECIPITABLE WATERS ALONG WITH LIFT ASSOCIATED WITH A WARM FRONT WILL RESULT IN A CHANCE OF SHOWERS AND EMBEDDED THUNDERSTORMS FOR TODAY. TODAY WILL BE WARM WITH HIGH TEMPERATURES IN THE LOW TO MID 80S UNDER MOSTLY CLOUDY SKIES. HIGH TEMPERATURES WEDNESDAY WILL RANGE FROM THE LOW 80S ALONG THE BEACHES.
1219 PM MDT TUE APR 21 2015 NORTHWEST FLOW CONTINUES ACROSS THE CENTRAL PLAINS THROUGH TONIGHT AHEAD OF A RIDGE BUILDING INTO THE ROCKIES.
THERE IS A SLIGHT CHANCE FOR AN ISOLATED THUNDERSTORM ACROSS HIGHER ELEVATIONS OF THE INTERIOR THIS EVENING AS AN UPPER LEVEL TROUGH TROUGH MOVES ACROSS THE REGION. THE MARINE LAYER WILL DEEPEN TONIGHT AS AN UPPER LEVEL LOW PRESSURE TROUGH MOVES ACROSS THE REGION TONIGHT AND NORTHERLY WINDS INCREASE AT THE COAST. THE INCREASING NORTHERLY WINDS WILL MAKE IT FEEL COOLER ALONG THE COAST. THE MODELS CONTINUE TO SHOW WEAK INSTABILITY AND CONVECTIVE PRECIPITATION ACROSS HIGHER ELEVATIONS OF INTERIOR MENDOCINO COUNTY ON WEDNESDAY AS THE UPPER LEVEL LOW PRESSURE TROUGH MOVES TO THE SOUTHEAST. A HIGH PRESSURE RIDGE WILL BUILD ACROSS THE REGION WEDNESDAY NIGHT.
300 PM CDT TUE APR 21 2015 COLD FRONT EXTENDING FROM NORTHERN LAKE MICHIGAN TO JUST NORTH OF KANSAS CITY EARLY THIS AFTERNOON. RESULTING IN DEW POINTS IN THE LOWER 20S AND EVEN SOME UPPER TEENS ACROSS THE NORTH HALF OF THE CWA. WITH THE AMOUNT OF DRY AIR AT THE LOWER LEVELS.
HIGH PRESSURE. WITH VERY DRY AIR IN THE LOWER LEVELS AND DEWPOINTS IN THE 30S/40S. CAPPING INVERSION LOOKS TO REMAIN STRONG UNTIL FLOW OVER THE WARM FRONT CAN OVERCOME IT BY LATE AFTERNOON/EVENING.
A COLD FRONT WILL BRING WIDESPREAD SHOWERS TO THE AREA ON WEDNESDAY. SCATTERED MAINLY LIGHT SHOWERS WERE OVER THE WRN/NRN CWA BUT VERY DRY AIR IN THE LOW LEVELS IS KEEPING ANY RESULTING RAINFALL LIGHT. A SFC TROF WILL DROP THROUGH THE AREA AT THE SAME TIME A WEAK SFC WAVE LIFTS FROM CENTRAL PA TO SRN NEW ENGLAND.
342 PM EDT TUE APR 21 2015 A LARGE UPPER LEVEL LOW PRESSURE SYSTEM ACROSS THE GREAT LAKES AND ONTARIO WILL DRIFT SLOWLY EASTWARD THROUGH THE END OF THE WEEK. SOME SNOW SHOWERS IN THE HIGHER ELEVATIONS. UPPER LEVEL LOW WILL CONTINUE TO SLIDE SLOWLY EASTWARD FROM NORTH OF THE GREAT LAKES. GENERALLY MORE OF THE SAME FOR THE ENTIRETY OF THE SHORT TERM FORECAST AS VERTICALLY STACKED LOW PRESSURE SYSTEM MEANDERS FROM NORTH OF THE GREAT LAKES TOWARDS MAINE. SEVERAL WEAK DISTURBANCES PASS THROUGH UPPER LEVEL TROF BRINGING FURTHER CHANCES FOR RAIN AND SNOW SHOWERS.
CLOUDS WILL BEGIN TO INVADE FROM THE NORTHWEST TONIGHT AS A COLD FRONT APPROACHES THE AREA.
301 PM EDT TUE APR 21 2015 A FRONT WILL PUSH EAST INTO THE MARITIMES TONIGHT AS A WEAK RIDGE OF HIGH PRESSURE BUILDS IN FROM THE WEST. A SECONDARY COLD FRONT WILL APPROACH FROM THE WEST ON WEDNESDAY AND WILL SLOWLY CROSS THE REGION WEDNESDAY NIGHT.
338 PM CDT Tue Apr 21 2015 (Tonight and Wednesday) Southerly flow this afternoon is helping increase low level moisture across West Central Texas, with dewpoints in the lower to mid 50s across much of the area. The increase in low level moisture will keep temperatures warmer, with lows in the lower to mid 60s.
115 PM EDT TUE APR 21 2015 COOLER AIR TAKING OVER IN THE WAKE OF A COLD FRONT. WILL BE REINFORCED BY ANOTHER COLD FRONT WEDNESDAY.
AN UPPER LEVEL HIGH PRESSURE RIDGE WILL TO APPROACH THE ROCKIES TODAY AND LIGHT, NORTHWEST FLOW ALOFT WILL CONTINUE OVER THE ZONES. A HIGH PRESSURE RIDGE WILL CONTINUE TO BUILD INTO MONTANA TODAY. AN UPPER LEVEL LOW PRESSURE TROF WILL APPROACH THE AREA WEDNESDAY AND THE AIRMASS WILL BECOME UNSTABLE DURING THE AFTERNOON WITH SCATTERED SHOWERS AND THUNDERSTORMS EXPECTED. AN ASSOCIATED COLD FRONT WILL CROSS THE NORTHERN ROCKIES AFTER MIDNIGHT WEDNESDAY NIGHT.
WILL LIKELY BE A BIT COOLER WHEN IT DOES RAIN AND WARMER WHEN IT DOES NOT. ISOLATED TO WIDELY SCATTERED CONVECTION IS EXPECTED LATE THIS AFTERNOON INTO TONIGHT AS A COLD FRONT DROPS SOUTH ACROSS THE AREA. THE DIURNALLY GUSTY WEST TO SOUTHWEST WINDS THIS AFTERNOON WILL BECOME LIGHT THIS EVENING BEFORE SHIFTING TO THE NORTHEAST AND BECOMING GUSTY FOR SEVERAL HOURS BEHIND THE COLD FRONT TONIGHT INTO EARLY WEDNESDAY MORNING.
615 PM EDT TUE APR 21 2015 A BROAD AREA OF LOW PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER OVER THE GREAT LAKES OVER THE NEXT COUPLE OF DAYS. THIS WEATHER SYSTEM WILL SUPPORT COOLER THAN NORMAL TEMPERATURES AND THE CHANCE FOR SOME ON AND OFF RAIN SHOWERS. THE MODEL SOUNDINGS FOR EARLY THIS EVENING CONTINUE TO SHOW THE INVERTED V SIGNATURE INDICATIVE OF DRIER AIR AT THE LOW LEVELS. THE UPPER LOW WILL MEANDER AND WEAKEN OVER THE NEXT FEW DAYS.
Temperatures today greatly exceeded expectations and model low level thermal progs and the latest experimental HRRR data suggests Saturday will only be a few degrees cooler than today in northeast Oklahoma, and as warm as today across southeast Oklahoma and northwest Arkansas.
1239 AM EST SAT JAN 30 2016 A PRESSURE RIDGE WILL MOVE OFF THE SOUTHEAST COAST TODAY.
BRINGING COOLER AIR BEHIND IT. ASSOCIATED WITH A RELATIVELY DEEP UPPER LEVEL LOW.
HIGH PRESSURE WILL MOVE EAST ACROSS FL TODAY THEN CONSOLIDATE WITH A SEPARATE HIGH OFF THE CAROLINA COAST THIS AFTN AND PUSH SEAWARD. FORECAST MODEL SOUNDINGS SHOW CONSIDERABLE DRY AIR IN THE LOW AND MID LEVELS SO NO RAIN IS FORECAST BUT JET-INDUCED CIRRUS/CIRROSTRATUS WILL STREAM ACROSS THE AREA FROM THE WEST. WILL DESCRIBE IT AS PARTLY SUNNY AS SUNSHINE WILL OCCASIONALLY BE FILTERED THROUGH THE HIGH CLOUDINESS. TEMPERATURES WILL REBOUND INTO THE LOWER 70S EXCEPT UPPER 60S ALG THE VOLUSIA COAST. NOT QUITE AS COOL TONIGHT WITH LOWS GENERALLY IN THE LOW TO MID 50S WITH SOME MARINE STRATOCU LIKELY STARTING TO ENCROACH ONTO THE TREASURE COAST FROM THE SOUTHEAST AND A CONTINUATION OF CI/CS STREAMING EASTWARD.
259 AM CST SAT JAN 30 2016 WEAK SURFACE WARM FRONT JUST OFF TO OUR SOUTHWEST WILL MOVE THROUGH THE AREA BEFORE DAYBREAK. HIGHS TODAY AND SUNDAY IN THE LOW TO MIDDLE 60S. LOW MOVES EAST ON SUNDAY WITH ATTENDANT COLD FRONT BRINGING A GOOD CHANCE FOR RAIN HERE IN THE MID STATE SUNDAY NIGHT.
A WEAK WARM FRONT EXTENDS SOUTHEAST FROM NW MISSOURI INTO NE ARKANSAS AND INTO NORTHERN ALABAMA. TEMPERATURES OVER NORTHEAST ALABAMA HAVE ALREADY DROPPED INTO THE LOWER TO MID 30S. WARMER AIR EXISTS ABOVE THE INVERSION. HAVE ADDED A RIDGE VALLEY SPLIT IN TEMPERATURES.
342 AM CST SAT JAN 30 2016 THE 09Z SURFACE ANALYSIS INDICATED THAT A LARGE AREA OF HIGH PRESSURE WAS CENTERED TO THE EAST OF THE FORECAST AREA ALONG THE SOUTHERN APPALACHIANS. A WEAK WARM FRONT WAS JUST TO THE SOUTH OF THE FORECAST AREA AND IS EXPECTED TO PUSH THROUGH THE AREA THIS MORNING. WE CAN EXPECT ANOTHER NICE DAY TODAY WITH MUCH WARMER TEMPS EXPECTED WITH A STRENGTHENING SOUTHERLY FLOW BEHIND THE WARM FRONT AND PLENTY OF SUNSHINE EXPECTED. HAVE FOLLOWED CLOSELY TO THE SLIGHTLY WARMER GFS TEMP GUIDANCE FOR THIS AFTERNOONS HIGHS. THE RIDGE AXIS WILL ONLY SLOWLY GIVE WAY THROUGH SUNDAY WITH ANOTHER UNSEASONABLY WARM DAY EXPECTED.
SOUTHERLY FLOW WILL DEVELOP LATER TONIGHT BRINGING WARMER TEMPERATURES TO THE REGION FOR THE WEEKEND. RAIN WILL DEVELOP ON SUNDAY AHEAD OF A COLD FRONT AND WILL SWING ACROSS THE REGION SUNDAY NIGHT. WARMER AIR WILL CONTINUE TO MOVE INTO THE REGION OVERNIGHT.
228 AM MST SAT JAN 30 2016 UPPER FLOW WILL BE ZONAL THROUGH SUNDAY NIGHT AHEAD OF A TROUGH MOVING INTO NEVADA.
HIGH PRESSURE WILL CONTINUE TO SETTLE IN ACROSS THE FLORIDA PENINSULA. TO THE LOW TO MID 40S ELSEWHERE. WHERE COOLER TEMPERATURES ARE EXPECTED. BUT QUITE A BIT WARMER.
1244 AM EST SAT JAN 30 2016 HIGH PRESSURE WILL BUILD OVERHEAD TONIGHT AND DRIFT OFFSHORE ON SATURDAY.
BAND OF CIRRUS WILL MOVE ACROSS THE REGION TODAY IN ADVANCE OF THE MID/UPPER LEVEL SHORT WAVE TROUGH OVER NORTHWEST MEXICO THAT MOVES SOUTHEAST INTO DEEP SOUTH TEXAS TONIGHT. THE LOW LEVEL FLOW WEAKENS OVERNIGHT AS THE LOW LEVEL JET MOVES TO THE EAST.
A LARGE CANOPY OF HIGH CLOUDS STREAMING IN FROM THE GULF WITHIN THE STRONG FLOW ALOFT (130+ KNOTS) SHOULD OFFSET RADIATIONAL COOLING WHICH SHOULD KEEP TEMPERATURES IN CHECK WITH NO FREEZING TEMPERATURES EXPECTED. SO SHOULD BE ABLE TO LET THE HIGH RISK OF RIP CURRENT STATEMENT EXPIRE AT 10 PM.
1008 PM EST FRI JAN 29 2016 HIGH PRESSURE WILL MOVE EAST ACROSS THE OHIO VALLEY TONIGHT. A WARM FRONT DEVELOPING OVER THE MISSISSIPPI VALLEY WILL LIFT NORTHEAST ACROSS THE GREAT LAKES ON SATURDAY. LOW PRESSURE WILL CROSS THE CENTRAL GREAT LAKES ON SUNDAY WITH A COLD FRONT DROPPING ACROSS THE AREA SUNDAY NIGHT.
DESPITE THE FACT THAT A WEAK 500 MB TROUGH WILL TRANSITION THROUGH THE BRO CWFA ONSUNDAY. AND A WEAK COLD FRONT AT THE SURFACE WILL PUSH INTO THE REGION ON THE SAME DAY BEFORE BECOMING STATIONARY. WARM SOUTHERLY WINDS OVER THE COOLER NEARSHORE WATERS OF THE LAGUNA MADRE AND GULF OF MEXICO MAY GENERATE SEA FOG THROUGHOUT THE NEXT 36 HOURS.
COOL HIGH PRESSURE ACROSS THE NORTHERN GULF OF MEXICO WILL BUILD IN ACROSS N CNTL FL BY EARLY SAT AM. IDEAL CONDITIONS FOR RADIATIONAL COOLING ESPECIALLY AFTER MIDNIGHT INTO EARLY SAT AM AS THE HIGH BUILDS IN. 34 ON THE 00Z JAX SOUNDING AND AFTERNOON DEWPOINTS IN THE LOWER/MID 30S.
934 PM EST FRI JAN 29 2016 HIGH PRESSURE WILL BUILD OVERHEAD TONIGHT AND DRIFT OFFSHORE ON SATURDAY.
A COLD FRONT IS EXPECTED TO PASS THROUGH THE AREA SUNDAY NIGHT.
TEMPERATURES WILL BE A FEW DEGREES COOLER THAN YESTERDAY. COOLER AND UNSETTLED NW FLOW WILL EXIST OVER THE REGION MON-WED. MOST INTERESTING ASPECT OF THIS UPCOMING COOLER AIRMASS WILL BE THE RELATIVELY STEEP MID LEVEL LAPSE RATES.
308 AM EST SAT JAN 30 2016 AVIATION SECTION UPDATED A COLD FRONT IS EXPECTED TO PASS THROUGH THE AREA SUNDAY NIGHT.
HIGH PRESSURE IS LOCATED OVER FLORIDA AND IS EXPECTED TO MOVE EAST THROUGH THE WEEKEND.
SURFACE TROF WILL CROSS THE AREA EARLY SATURDAY. WITH WINDS BECOMING NORTHWEST BEHIND IT AND TEMPERATURES COOLER SATURDAY. A MUCH STRONGER 500HPA/700HPA TROFS PASS THROUGH. WITH MAIN TROF AXIS LOCATED ALONG MO RIVER BY 12Z SUNDAY. NOT LOOKING FOR MUCH IN THE WAY OF PCPN WITH DRY TROF PASSAGE EXPECTED. BUT WILL USHER IN COOLER AIR AS 850HPA TEMPS FALL FROM THE POSITIVE SIDE OF ZERO 12Z SATURDAY.
A COMPACT TROUGH WAS DIVING SOUTHEAST FROM THE PALMER DIVIDE INTO WESTERN KANSAS WITH A COLD FRONT ABOUT 100 MILES IN ITS ADVANCE. THE MOST PROMINENT LOW LEVEL THERMAL RIDGE AHEAD OF THIS FRONT WAS SHARPENING ALONG A MORTON-LUBBOCK-ALTUS LINE AS OF 19Z COINCIDENT WITH AN AXIS OF LOW RH VALUES /AS LOW AS 5 PERCENT/ AND ENHANCED WESTERLY WINDS. AS THE AFOREMENTIONED COLD FRONT ARRIVES THIS EVENING. THE TRAILING PRESSURE RIDGE WILL BE SHUNTED EAST AS THE FLOW TURNS FROM NW-W. SUNDAY WILL START OFF WITH ZONAL FLOW WITH A HIGH AMPLITUDE RIDGE FORMING BETWEEN A TROUGH ALONG THE WEST COAST AND STRONG LOW ACROSS THE ALEUTIANS. THE WEST COAST TROUGH WILL DIG INTO THE GREAT BASIN.