Aikyam-Lab/Synoptic-Bench huggingface dataset:
341 AM EDT FRI JUL 31 2015 A COLD FRONT IS STALLED ACROSS CENTRAL GEORGIA THIS MORNING AND ALTHOUGH THE FRONT WILL WEAKEN THROUGH THE SHORT TERM AND WASH OUT. OBSERVATIONS ALREADY SHOW THE DEW POINTS IN THE LOW TO MID 60S ACROSS PARTS OF NORTH GEORGIA AND WHILE SOME OF THIS DRIER AIR WILL FILTER FURTHER SOUTH. 11 MODELS ARE SHOWING GOOD AGREEMENT ON A WEAK COLD FRONT STALLED ACROSS PARTS OF CENTRAL GEORGIA SATURDAY NIGHT.
314 AM CDT FRI JUL 31 2015 AN UPPER LEVEL TROUGH REMAINS OVER THE EASTERN ONE THIRD OF THE NATION THIS MORNING AS UPPER RIDGING REMAINS CENTERED OVER THE FOUR CORNERS REGION. HIGH PRESSURE REMAINS OVER THE MID SOUTH AND WILL CONTINUE TO PROVIDE DRY AND PLEASANT MID SUMMER WEATHER CONDITIONS OVER THE REGION THROUGH THE WEEKEND.
TEMPERATURES ONLY A FEW DEGREES COOLER. THIS DRIER AIR WILL REMAIN IN PLACE FOR THE NEXT COUPLE OF DAYS AS SEVERAL WEAK DISTURBANCES WILL SLIDE AROUND THE SOUTHERN SIDE OF A DIGGING TROUGH IN THE EAST.
A COLD FRONT WILL PUSH SOUTHEASTWARD THROUGH THE AREA THIS MORNING. HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH THE WEEKEND. A LINE OF SHOWERS AND STORMS HAS DEVELOPED JUST AHEAD OF THE COLD FRONT. EXPECT CLEARING AND DEWPOINTS DROPPING INTO THE LOW TO MID 60S.
140 AM EDT FRI JUL 31 2015 THE AVIATION SECTION HAS BEEN UPDATED BELOW HIGH PRESSURE WILL BRING QUIET AND SEASONABLE CONDITIONS TO CENTRAL INDIANA THROUGH THE END OF THE WEEK. PREVIOUS A RIDGE OF HIGH PRESSURE OVER THE CENTRAL PLAINS WILL CONTINUE TO BUILD ACROSS THE AREA. A FEW SHORT TERM MODELS ARE STILL HINTING AT SOME PRECIPITATION DEVELOPMENT WITH A WEAK COLD FRONT MOVING ACROSS THE AREA LATE FRIDAY. THEREFORE KEPT FORECAST DRY AS HIGH PRESSURE TO THE SOUTH CUTS OFF ANY CHANCE OF SIGNIFICANT RETURN FLOW.
302 AM CDT FRI JUL 31 2015 AN UPPER LEVEL RIDGE OVER THE WEST COAST AND ROCKIES WITH LOW PRESSURE OVER HUDSON BAY WILL KEEP A DRY NORTHWEST FLOW ALOFT OVER NORTH DAKOTA TODAY AND TONIGHT. A HIGH PRESSURE RIDGE AXIS EXTENDED FROM CENTRAL ALBERTA SOUTHEASTWARD ACROSS SOUTHERN SASKATCHEWAN AND INTO THE DAKOTAS. MAINLY QUIET WEATHER CONTINUES THROUGH THE WEEKEND INTO EARLY IN THE WORK WEEK AS UPPER RIDGE OVER THE WESTERN CONUS BRINGS NORTHWESTERLY FLOW TO OUR AREA.
WITH THE FORECAST AREA RESIDING ON THE EASTERN PERIPHERY OF A LARGE UPPER- LEVEL RIDGE CENTERED OVER THE SOUTHWEST. AN UPPER-LEVEL TROUGH REMAINS OVER THE EAST COAST THROUGH TODAY AND SATURDAY. THE TROUGH OVER THE EAST COAST WILL DEEPEN SOME THROUGH THE DAY.
DEWPOINTS WILL TRY TO INCREASE THROUGHOUT THE DAY BUT SHOULD BE LIMITED TO THE LOWER 60S BEFORE DAYTIME MIXING ALLOWS DRIER AIR TO MIX DOWN. WITH THIS LOWER DEWPOINT AIR ALSO LIMITING HEAT INDICES. KEEPING ANY DEVELOPMENT OUT AHEAD OF APPROACHING TROUGH/BOUNDARY OUTSIDE OF THE CWA. RODRIGUEZ 251 AM CDT 500MB TROUGH AXIS WILL BE PIVOTING EAST ACROSS THE EASTERN GREAT LAKES SAT. WHILE RIDGING PERSIST ACROSS THE WESTERN CONUS. THE 500MB TROUGH AXIS CONTINUES TO SEND A FEW WEAK LOBES OF VORTICITY SOUTH ACROSS THE UPPER MIDWEST SUN/MON. ENSEMBLES THEN TREND BACK TOWARDS THE WESTERN RIDGE DEVELOPING. HELPING TO BRING A SLIGHTLY STRONGER TROUGH BACK ACROSS THE GREAT LAKES REGION TOWARDS MID-WEEK. WITH UNSEASONABLY COOLER AIR STEADILY ADVECTING SOUTH WITH A THERMAL TROUGH SETTING UP OVER THE GREAT LAKES REGION. HIGH PRESSURE REMAINS OVERHEAD.
A RIDGE OF HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH SATURDAY.
WITH SOUTH TX MORE ON THE PERIPHERY OF THE UPPER LVL RIDGE. SATURDAY WILL BE A GENERALLY TWO TO THREE DEGREES WARMER WITH DRIER AIR OVER THE REGION.
INDICATIVE OF THE DRIER AIR THAT LIES TO THE N AHEAD OF SFC RIDGING OVER CNTRL MO AND NRN AR.
WEAK HIGH PRESSURE OVERHEAD WILL MOVE SOUTHEAST TODAY. WHILE SLIGHTLY COOLER AIR HAS MOVED INTO EASTERN COUNTIES. RETURN FLOW AROUND THIS HIGH WILL GENERATE A SHORT LIVED 20 TO 30KT LOW LEVEL JET OVER NORTH CENTRAL SOUTH DAKOTA. DESPITE THE LOW CONFIDENCE.
126 AM EDT FRI JUL 31 2015 DRY WITH HIGH PRESSURE IN CONTROL TODAY. WEAK BAROCLINIC TROUGH TO BRING LOW CHANCES FOR CONVECTION FRIDAY NIGHT. WITH AN UPPER LEVEL RIDGE ACROSS THE SRN STATES SHIFTING WEST AND A PERSISTENT TROUGH BUILDING ACROSS THE EAST. THERE IS DISAGREEMENT CONCERNING HOW MUCH THE WESTERN RIDGE WILL AMPLIFY. SHOULD SEE SOME BREAK IN THE HIGHER AFTERNOON READINGS OWING TO INCREASED CLOUDS. AND OUR INCREASED DISTANCE FROM THE WESTERN RIDGE.
327 AM MDT FRI JUL 31 2015 THE SUBTROPICAL RIDGE REMAINS STRETCHED ACROSS THE SOUTHERN- CENTRAL FORECAST AREA THROUGH THESE PERIODS PROVIDING STRONG HEATING. LITTLE CHANGE SEEN FOR SATURDAY WITH NO GOOD FORCING UNDER THE BROAD RIDGE. HIGH PRESSURE WILL BE SITUATED ACROSS THE SWRN CONUS THROUGH THIS FORECAST PERIOD. UPPER LEVEL DISTURBANCE WEST OF THE SRN BAJA TIP GETS ENTRAINED INTO THE SSW FLOW AHEAD OF THE ERN PACIFIC CLOSED LOW CIRCULATION. THIS DISTURBANCE RIDES THE TOP OF THE HIGH PRESSURE RIDGE.
343 AM PDT FRI JUL 31 2015 MONSOONAL MOISTURE WILL STEADILY DECREASE THROUGH SATURDAY WITH WIDELY SCATTERED THUNDERSTORMS STILL POSSIBLE NEAR THE HIGHER MOUNTAINS FOR THIS AFTERNOON WITH ISOLATED FLASH FLOODING POSSIBLE.
BUT A COLD FRONT JUST TO THE NORTH OF THE AREA WILL SLOWLY MOVE THROUGH TODAY. SH/TS WILL ONCE AGAIN BE BACK TO THE AREA ONCE THE COLD FRONT LIFTS NORTH OVER THE WEEKEND. A WEAK COLD FRONT WILL APPROACH THE COASTAL WATERS FRIDAY INTO SATURDAY AND BECOME STATIONARY NEAR THE COAST OVER THE WEEKEND.
419 AM CDT FRI JUL 31 2015 Today - Saturday Night: Primary upper trough entrenched from Hudson Bay into the Mid Atlantic States while elongated dome of high pressure extends from the intermountain region into the Southern Plains. Aided by similar instability parameters and a bit stronger 0-6km shear and fueled by the low-level jet believe there is a better chance for more organized severe thunderstorms over northern MO.
646 AM EDT FRI JUL 31 2015 A WEAK COLD FRONT WILL MOVE SOUTHEAST ACROSS THE GREAT LAKES THIS AFTERNOON. NARROW LL THETA-E RIDGING NOTED UPSTREAM IN 00Z RAOBS AND XPCD TO ADVT E/NE INTO THE AREA BY THIS AFTN. THIS PERIOD WILL FEATURE A SOMEWHAT ACTIVE NORTHWEST FLOW REGIME UNDER A QUASI-STATIONARY HUDSON BAY UPPER LOW THAT WILL SLOWLY PIVOT SOUTHEAST.
146 AM EDT FRI JUL 31 2015 DRY WITH HIGH PRESSURE IN CONTROL TODAY. COLD FRONT TO THE EAST OF THE CWA. WITH HIGH PRESSURE BUILDING IN FROM THE WEST. A COLD FRONT. WEAK BAROCLINIC TROUGH TO BRING LOW CHANCES FOR CONVECTION FRIDAY NIGHT. WITH AN UPPER LEVEL RIDGE ACROSS THE SRN STATES SHIFTING WEST AND A PERSISTENT TROUGH BUILDING ACROSS THE EAST. THERE IS DISAGREEMENT CONCERNING HOW MUCH THE WESTERN RIDGE WILL AMPLIFY. SHOULD SEE SOME BREAK IN THE HIGHER AFTERNOON READINGS OWING TO INCREASED CLOUDS. AND OUR INCREASED DISTANCE FROM THE WESTERN RIDGE.
146 AM EDT FRI JUL 31 2015 A HIGH PRESSURE RIDGE WILL GRADUALLY BUILD SOUTH ACROSS THE AREA TONIGHT THROUGH FRIDAY MORNING.
414 AM EDT FRI JUL 31 2015 HIGH PRESSURE WILL PROVIDE DRY AND WARM CONDITIONS TODAY. BEFORE A COLD FRONT MOVES THROUGH THE REGION TONIGHT.
111 AM EDT FRI JUL 31 2015 A COLD FRONT WILL MOVE THROUGH THE REGION OVERNIGHT WITH SHOWERS AND THUNDERSTORMS.
BOISE VERIFICATION STILL SHOWS THE WARM BIAS IN THE MODELS, SO WENT WITH A SLIGHTLY COOLER SOLUTION.
233 AM CDT FRI JUL 31 2015 VERY QUIET CONDITIONS ACROSS THE REGION AS UPPER RIDGING TRIES TO BUILD IN ALONG THE NORTHWEST FLOW ALOFT. THIS WEATHER PATTERN LOOKS TO SIT OVER THE AREA THROUGH THE WEEKEND AS HIGH PRESSURE SETTLES IN.
SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP ACROSS THE NORTH CENTRAL GULF OF MEXICO THIS MORNING ASSOCIATED WITH A WEAK 500MB LOW/INVERTED TROUGH.
A TROPICAL UPPER TROPOSPHERIC TROUGH (TUTT) IS MOVING TO THE NORTHWEST INTO THE BAHAMAS. THE ZONALLY-DEPRESSED WESTERN EXTENT OF THE ATLANTIC RIDGE EXTENDS ACROSS THE FLORIDA KEYS AND AREA COASTAL WATERS.
239 AM EDT FRI JUL 31 2015 HIGH PRESSURE WILL EXTEND EASTWARD FROM THE LOWER MISSOURI VALLEY INTO THE MID ATLANTIC TODAY PROVIDING LOWER HUMIDITY. THIS HIGH WILL STAY OVER MOST OF REGION THIS WEEKEND.
616 AM EDT FRI JUL 31 2015 HIGH PRESSURE WILL PROVIDE DRY AND WARM CONDITIONS TODAY. BEFORE A COLD FRONT MOVES THROUGH THE REGION TONIGHT.
1206 AM CDT FRI JUL 31 2015 QUIET WEATHER CONDITIONS WILL CONTINUE OVERNIGHT AS HIGH PRESSURE BRINGS MOSTLY CLEAR SKIES. WHILE OVERNIGHT LOW TEMPERATURES DROP INTO THE LOWER TO MIDDLE 60S. BROAD UPPER LEVEL RIDGING IN THE WESTERN HALF OF THE COUNTRY AND BROAD UPPER LEVEL TROUGHING IN THE EAST WILL EVOLVE INTO HIGHER AMPLITUDE FLOW BY LATE IN THE WEEKEND.
131 AM EDT FRI JUL 31 2015 TONIGHT AND FRIDAY WILL BE DRY WITH WEAK HIGH PRESSURE. MIN TEMPS UPPER 50S AND LOWER 60S BUT AROUND ELMIRA MAY BE COOLER. A RIDGE OF HIGH PRESSURE BUILDS IN FROM THE SW. TEMPERATURES WILL REBOUND INTO THE LOW AND MID 80S. THE WEEKEND WILL FEATURE A TRANSITION TO A SIGNIFICANT PATTERN CHANGE ALOFT AS RIDGING OVER THE SOUTHERN AND CENTRAL U. IS PUSHED WESTWARD IN RESPONSE TO A DEEPENING UPPER LEVEL TROUGH DEVELOPING OVER EASTERN CANADA. WEAK SHORT WAVES ROTATING THROUGH THE BASE OF THE UPPER TROUGH WILL BRING CHANCES FOR CONVECTION FOR OUR AREA THROUGH THE WEEKEND.
THIS WILL ALLOW FOR COOLER OVERNIGHT LOWS THROUGH THE WEEKEND.
Very dry conditions are occurring across the Northern Rockies as the anticipated ridge of high pressure has now positioned itself comfortably over the region. In western Montana, expect upper 90s to near 100 degrees in the lower valleys of northwest Montana and parts of west central Montana, including the Bitterroot and Missoula Valleys.
235 AM MDT FRI JUL 31 2015 UPPER RIDGE OVER THE GREAT BASIN WILL GRADUALLY BUILD OVER THE CENTRAL ROCKIES AND BE THE DOMINANT FEATURE OF THE SHORT TERM PERIOD.
140 AM EDT FRI JUL 31 2015 /ISSUED 328 PM EDT THU JUL 30 2015/ A WEAK COLD FRONT IS MAKING PROGRESS SOUTHWARD INTO FAR NORTH GEORGIA THIS AFTERNOON. RW /ISSUED 328 PM EDT THU JUL 30 2015/ MODELS CONTINUE TO AGREE ON A WEAK COLD FRONT REMAINING STALLED ACROSS THE SOUTH HALF OF GEORGIA OVER THE WEEKEND AND POSSIBLY PROVIDING A FOCUS FOR ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS THERE DURING THE AFTERNOON AND EVENING.
FLOW AROUND THE HIGH SHOULD CONTINUE TO KEEP MOISTURE LOW WHILE NORTHWEST FLOW ALOFT OVER THE ROCKIES SHOULD MAINTAIN A WARM ELEVATED MIXED LAYER ACROSS WESTERN NORTH DAKOTA. AN UPPER LEVEL RIDGE WILL BUILD ACROSS THE WESTERN CONUS THROUGH THE REST OF THE WEEK. SEVERAL FAST MOVING SHORT WAVE TROUGHS TRAVERSING THE RIDGE MAY BRING SOME LIGHT PRECIPITATION TO THE AREA THIS WEEKEND.
NAM SHOWS A STRONG 500 MB RIDGE OVER THE WESTERN U. 12Z SAT WITH A TROUGH OVER THE LOWER GREAT LAKES. NAM CONTINUES TO HAVE NORTHWEST UPPER FLOW OVER THE UPPER GREAT LAKES THIS FORECAST PERIOD WITH UPPER LEVEL TROUGHING NEARBY.
THERE IS A WEAK SURFACE TROF PASSING THROUGH COUPLED WITH A MID LEVEL TROF UP ABOVE. TEMPS WILL BE A FEW DEGREES COOLER THAN YESTERDAY.
ADDITIONAL CONVECTION IS EXPECTED TO DEVELOP BY THIS AFTERNOON MAINLY ACROSS THE HIGHER TERRAIN. ONSHORE FLOW WILL CONTINUE DURING THE WEEKEND WHICH WILL BRING COOLER TEMPERATURES TO EVEN INLAND AREAS. AN UPPER LEVEL LOW OVER THE GULF OF ALASKA WILL DEEPEN AND ITS ASSOCIATED TROUGH WILL EXTEND ALONG THE WEST COAST. THIS WILL KEEP COOLER TEMPS ACROSS THE DISTRICT AS WELL AS BREEZY NORTH WINDS OVER THE COASTAL WATERS AND NEAR-SHORE AREAS.
SURFACE TROF AXIS ACROSS SE CO ALONG WITH THE REMNANT MCV RIDING THROUGH EXTREME NE NM INTO FAR SE CO IS ALLOWING THUNDERSTORMS TO DEVELOP ALONG THE RATON RIDGE AND ACROSS CIMARRON COUNTY, OK. GENERALLY WEAK NORTH TO NORTHWEST FLOW ALOFT PROGGED ACROSS THE AREA INTO THE EARLY WEEKEND AS THE LARGE UPPER RIDGE CONTINUES TO BUILD ACROSS THE FOUR CORNERS AND INTO THE NORTHERN GREAT BASIN. THIS WILL KEEP THE EASTERN PLAINS GENERALLY DRY WITH DIURNAL ISOLATED TO SCATTERED STORMS CONFINED TO AREAS OVER AND NEAR THE HIGHER TERRAIN.
402 AM CDT FRI JUL 31 2015 MAIN UPPER LOW OVER HUDSON BAY WITH THE UPPER LEVEL JET FROM CENTRAL ALBERTA INTO CENTRAL/SOUTHERN MANITOBA INTO NW ONTARIO. OTHERWISE CONVECTIVE TEMPS IN THE LOWER 80S GOOD FOR SOME CU TODAY.
127 AM EDT FRI JUL 31 2015 HIGH PRESSURE AND A DRY AIRMASS WILL PUSH ACROSS THE AREA TONIGHT THROUGH FRIDAY. A WEAK COLD FRONT MAY RESULT IN A FEW SHOWERS AND THUNDERSTORMS FRIDAY NIGHT. AFTER HIGH PRESSURE RETURNS FOR SATURDAY.
UPPER RIDGE OVER EAST IDAHO. PLENTIFUL MOISTURE OVER GREAT BASIN TRYING TO WORK AROUND PERIPHERY OF RIDGE PER WV SAT IMAGERY.
207 AM CDT FRI JUL 31 2015 THE 07Z SURFACE ANALYSIS INDICATED THAT A BROAD AREA OF HIGH PRESSURE WAS RIDGING SOUTHEAST INTO THE FORECAST AREA FROM THE CENTRAL PLAINS THROUGH THE LOWER OHIO VALLEY.
241 AM CDT FRI JUL 31 2015 PoPs and temperatures will continue to be modulated by the subtropical ridge and the mid level theta-e ridge entrained within said ridge. Today, the subtropical ridge axis will be to the north of the CWFA as will be the theta-e ridge, while dropping se from the ne-n, nearing the far ern CWFA. The subtropical ridge amplifies to the nw Sat PM with indications of a weak shrtwv trof within the nw flow aloft. This will favor the mid level theta-e ridge axis farther s into the n-ne CWFA and worthy of scattered PoPs, which are already in the forecast.
240 AM EDT FRI JUL 31 2015 A COLD FRONT MOVES ACROSS THE REMAINDER OF THE AREA OVERNIGHT. FOLLOWED BY WEAK HIGH PRESSURE MOVING ACROSS THE AREA ON FRIDAY. WEAK HIGH PRESSURE WILL PREVAIL ACROSS THE AREA. THE COLD FRONT HAS MOVED ACROSS NORTHERN INTERIOR PORTIONS OF THE FORECAST REGION WITH LOWER DEWPOINTS IN THOSE LOCATIONS. THE COLD FRONT WILL MAKE SLOW PROGRESS THROUGH THE REMAINDER OF THE REGION OVERNIGHT. LOWS TONIGHT WILL DROP INTO THE LOW 70S IN/AROUND NYC. A SERIES OF COLD FRONTS WILL MOVE ACROSS THE REGION STARTING SATURDAY AFTERNOON AND CONTINUING INTO THE START OF THE NEW WEEK.
TODAY AND TONIGHT SUPPRESSION OF GEOPOTENTIAL HEIGHTS OVER THE SOUTHEASTERN UNITED STATES WILL ALLOW THE BROADENING CLOSED LOW ANOMALY OVER PORTIONS OF NORTHEASTERN NORTH AMERICA TO REACH BACK AND REGAIN AN INFLUENCE OVER THE GREAT LAKES REGION TODAY AND TONIGHT.
340 AM CDT SUN APR 26 2015 HAND ANALYSIS OF THE 07Z MSL DATA SHOWED AN INVERTED TROUGH FROM A LOW IN SOUTHEAST SASKATCHEWAN TO A LOW IN SOUTHEAST COLORADO. THERE WAS ALSO LOW PRESSURE CENTERED OVER SOUTHWEST WYOMING. ALL THREE LOW PRESSURE SYSTEMS HAD UPPER SUPPORT INDICATED IN THE WATER VAPOR IMAGERY. SHOWERS AND ISOLATED THUNDERSTORMS ARE STILL EXPECTED WITH THE INVERTED TROUGH IN THE WESTERN NEBRASKA SANDHILLS AND THE PANHANDLE. THE UPWARD MOTION WITH THE INVERTED TROUGH IS ALSO WEAK. THE PATTERN HOWEVER TRANSITIONS BY MID-WEEK AS UPPER TROPOSPHERIC RIDGING AMPLIFIES ACROSS THE PLAINS INTO CENTRAL CANADA.
151 AM PDT Sun Apr 26 2015 High pressure brings dry conditions through at least mid week.
138 AM EDT SUN APR 26 2015 THE NORTH COUNTRY WILL REMAIN UNDER CYCLONIC FLOW FROM A LOW PRESSURE AREA OVER NORTHERN MAINE AND THE CANADIAN MARITIMES THROUGH MONDAY.
THE DEPTH OF THE LOW LEVEL MOISTURE WILL BE THE KEY TO CHANCES OF LIGHT PRECIPITATION ACROSS SOUTHWEST KANSAS TODAY. CURRENTLY AM CONCERNED ABOUT HOW FAR NORTH THE PRECIPITATION CHANCES WILL BE GIVEN THE LOCATION OF THE 700MB TO 500MB DEFORMATION ZONE AND THE SLIGHTLY TRACK OF THE UPPER LOW ACROSS WEST TEXAS. FURTHER SOUTH THE HIGHEST FOR OVERNIGHT PRECIPITATION WILL BE NEAR THE OKLAHOMA BORDER. FOR SUNDAY NIGHT INTO MONDAY, A STRONG UPPER LOW OVER CENTRAL NEW MEXICO WILL MOVE INTO THE SOUTHERN PLAINS ON MONDAY WITH INCREASING CHANCES FOR SHOWERS AND ISOLATED THUNDERSTORMS. LOWS MONDAY MORNING WILL BE IN THE LOW TO MID 40S.
1208 AM CDT SUN APR 26 2015 LOW PRESSURE SYSTEM PUSHING ACROSS THE MID MISS RVR VALLEY THIS AFTERNOON. WHILE THE NEXT TROUGH DIGS TOWARDS THE DESERT SOUTHWEST. LOW PRESSURE SYSTEM MOVING TOWARDS THE ROCKIES OVERNIGHT SENDING A DISTURBANCE AHEAD AND WILL BRING A CHANCE FOR SHOWERS AND A FEW RUMBLES OF THUNDER TO WESTERN NEBRASKA. EVEN WITH THE LOW SHIFTING EAST. BY SUNDAY MORNING THE UPPER LOW WILL BE CROSSING THE SOUTHERN ROCKIES.
328 AM CDT SUN APR 26 2015 HIGH PRESSURE RIDGE WILL BUILD INTO IA FROM THE NORTH TODAY WITH CLOUD FIELD BEING ERODED GRADUALLY AS DRIER AIR SPREADS SOUTHWEST. TEMPS TODAY WILL WARMER WITH THE SUNSHINE.
355 AM EDT SUN APR 26 2015 LOW PRESSURE ALONG THE VIRGINIA-NORTH CAROLINA BORDER WILL MOVE OFF THE COAST THIS MORNING. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL SPIN IN THE GULF OF MAINE DURING THE EARLY PART OF THE WEEK.
A COLD FRONT WILL APPROACH FROM THE NORTH LATE TODAY AND TONIGHT AND SETTLE ALONG THE COAST MONDAY MORNING AND BECOME STATIONARY. THIS ACTIVE PATTERN WILL EVOLVE AS AN UPPER TROUGH CURRENTLY DIGGING OVER THE ROCKIES CLOSES OFF AN UPPER LOW OVER THE FOUR CORNERS REGION WHICH WILL THEN SLOWLY TRANSLATE EASTWARD ACROSS THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY DURING THE FIRST HALF OF THE WEEK.
THE UPPER TROUGH THAT BROUGHT PRECIPITATION TO THE REGION MOVED INTO ARIZONA OVERNIGHT RESULTING IN UPPER LEVEL NORTHERLY FLOW OVER THE REGION. UPPER LEVEL HIGH PRESSURE WILL BEGIN TO SLOWLY BUILD OVER CALIFORNIA AND THE PACIFIC NORTHWEST THIS AFTERNOON. TEMPERATURES THIS AFTERNOON WILL BE BETWEEN 5 AND 7 DEGREES WARMER COMPARED TO YESTERDAY AFTERNOON.
A SHORT WAVE TROUGH SWINGING ACROSS THE WESTERN PART OF THE REGION TONIGHT INTO SUNDAY MORNING WAS ALREADY BRINGING SOME SHOWERS/THUNDERSTORMS INTO FAR WESTERN SOUTH DAKOTA THIS AFTERNOON. SUNDAY SHOULD BE MOSTLY SUNNY ACROSS THE CWA ALONG WITH WARMER CONDITIONS. AS THE RESPONSIBLE UPPER LEVEL LOW PRESSURE TROUGH SLIDES ACROSS THE NORTHERN PART OF THE REGION SUNDAY NIGHT THROUGH MONDAY NIGHT.
426 AM EDT SUN APR 26 2015 LOW PRESSURE TRACKS EAST ACROSS NORTH CAROLINA THIS MORNING.
A 700MB TROUGH LAGGING BEHIND THE UPPER LEVEL FEATURES IS BRINGING ONE LAST ROUND OF SHOWERS TO THE WEST SIDE THIS EVENING. OVERNIGHT THROUGH SUNDAY A WARM FRONT MOVING THROUGH THE AREA WILL BRING A MIX OF CLOUDS AND SUN TO THE AREA, WITH CLOUDS MOST NUMEROUS FROM THE COASTAL MOUNTAINS WESTWARD. THIS WARM FRONT WILL YIELD A RAPID, SUBSTANTIAL, BUT BRIEF WARM-UP ACROSS THE AREA ON MONDAY WITH HIGHS ABOUT 20 DEGREES HIGHER THAN WAS OBSERVED TODAY.
AND THEN NORTHEAST BY MONDAY AS HIGH PRESSURE MOVES IN. THIS HIGH AND OFFSHORE WINDS WILL BRING FAIR SKIES AND ABOVE NORMAL TEMPERATURES INTO MIDWEEK. CALIFORNIA IS ON THE EAST SIDE OF LARGE EAST PAC RIDGE THAT EXTENDED INTO BRITISH COLUMBIA. WHEN THE HIGH IS OVER MT SHASTA THIS EVENING THE NORTH GRADIENTS WILL BE STRONG ENOUGH TO PRODUCE A SUNDOWNER WITH ADVISORY LEVEL GUSTS ACROSS THE SBA SOUTH COAST. THE RIDGE WILL CONTINUE TO INCREASE AND WITH THE OFFSHORE FLOW MAX TEMPS WILL SOAR.
HIGH PRESSURE WILL RETURN BEGINNING MONDAY AND REMAIN THROUGH MOST OF THE WEEK.
AN UPPER LEVEL LOW OVER AZ WILL MOVE EAST AND APPROACH THE TEXAS PANHANDLE TONIGHT. TEXAS TECH WRF AND ARW/NMM ALL TARGET THE AREA IN THE AFTERNOON PRIMARILY BECAUSE THEY ARE A BIT SLOWER WITH THE UPPER LEVEL TROUGH. A COLD FRONT WILL CROSS SE TX LATE MONDAY NIGHT WITH BREEZY NW WINDS DEVELOPING IN THE WAKE OF THE FRONT.
ELONGATED UPPER LOW CENTERED OFF THE NE U. COAST TROUGHS BACK INTO THE GREAT LAKES AND OH VALLEY. ZONAL FLOW ALOFT SHIFTS TO THE NW TONIGHT AS THE TROUGH SHIFTS A BIT SE. A FEW SPRINKLES OR LIGHT SHOWERS ARE POSSIBLE FAVORING THE HIGHER ELEVATIONS EARLY TODAY.
237 AM EDT SUN APR 26 2015 A RIDGE OF HIGH PRESSURE WILL GRADUALLY BUILD ACROSS THE REGION EARLY THIS WEEK. AN UPPER LEVEL TROUGH CENTERED ACROSS WEST CENTRAL ILLINOIS THIS AFTERNOON WILL BECOME INCREASINGLY AFFECTED BY WESTERN PERIPHERY OF SOUTHEAST CANADIAN UPPER NEGATIVE HEIGHT ANOMALY. THAT TEMPERATURES MAY DROP NEAR THE FREEZING MARK ONCE AGAIN. DEPARTING UPPER LOW WILL NOT BE DONE WITH THE REGION YET AS 2 SPOKES OF ENERGY ROTATE THROUGH INTO MONDAY.
LOW MVFR/IFR CIGS DROPPING DOWN BEHIND A COLD FRONT EXPECTED TO REMAIN OVER THE AREA MOST OF THE DAY.
READINGS WILL LIKELY MAX OUT IN THE LOWER 60S ACROSS THE AREA. DAYTIME HIGHS IN THE LOW TO MID 60S ARE ON TAP. BUT STILL SLIGHTLY WARMER THAN WHAT WE EXPECT TODAYS HIGHS TO BE. PERSISTENT UPPER LEVEL TROUGHING OVER THE EASTERN CONUS WILL BRING BELOW NORMAL TEMPERATURES THROUGH MOST OF THE PERIOD.
315 AM EDT SUN APR 26 2015 LOW PRESSURE TRACKS EAST ACROSS NORTH CAROLINA THIS MORNING.
PRE-FRONTAL TROUGH SETTLING ACROSS NORTH CENTRAL FLORIDA WITH PLUME OF DEEP TROPICAL MOISTURE STREAMING ACROSS THE GULF OF MEXICO AND MUCH OF THE FLORIDA PENINSULA. ATMOSPHERE OVER THE NORTHEAST GULF OF MEXICO ALONG THE PRE-FRONTAL TROUGH WILL LIKELY DESTABILIZE EARLY THIS MORNING WITH SCATTERED SHOWERS AND A FEW THUNDERSTORMS DEVELOPING ALONG THE PRE-FRONTAL TROUGH. STRONG U/L DIFFLUENCE ON THE SOUTHEAST SIDE OF THIS SYSTEM WILL BECOME SUPERIMPOSED OVER A BOUNDARY THAT EXTENDS ACROSS THE NORTHERN GULF OF MEXICO AND THE CENTRAL FLORIDA PENINSULA WITH A COMPLEX AREA OF LOW PRESSURE DEVELOPING OVER THE NORTHWEST GULF OF MEXICO.
346 AM CDT SUN APR 26 2015 THE LATEST SFC ANALYSIS WAS INDICATING A BROAD RIDGE OCCUPYING MUCH OF THE UPPER MIDWEST. MID/UPPER LEVEL MOISTURE FLOW PATTERNS ON THE LATEST WATER VAPOR LOOP INDICATING A DEEP TROF ACRS THE SOUTHERN GRT BSN. WITH OMEGA BLOCKING UPPER RIDGE AXIS HOLDING FIRM ACRS THE PLAINS.
An upper low will spin through southern Kansas and Oklahoma. A little shift in the upper low track could bring some precipitation into the Linn, KS to Bates, MO areas but even this, being on the northern edges of the low, wouldn't amount to much. Thus the only influence this low should have on our weather is increased cloud cover, mainly over the southern forecast area. By the middle to later part of the week, ridging over the western CONUS will begin to spread east into the center of the country.
237 AM PDT SUN APR 26 2015 An upper level low will weaken and move out of the Inland Northwest today. This will be followed by high pressure, with warmer temperatures and mostly dry conditions, for the beginning of the work week.
239 AM CDT SUN APR 26 2015 TRANQUIL WEATHER TODAY THROUGH MONDAY UNDER THE INFLUENCE OF HIGH PRESSURE CENTERED OVER WESTERN ONTARIO.
317 AM CDT SUN APR 26 2015 WV IMAGERY THIS MORNING REVEALING AN UPPER LEVEL RIDGE SITUATED OVER THE NRN/CNTRL PL WITH AN UPSTREAM LONGWAVE TROF OVER THE WRN CONUS. HIRES PROGS IN PRETTY GOOD AGREEMENT WRN TROF WILL BOTTOM OUT LATER THIS MORNING OVER AZ/NM. MET/MAV VALUES ARE QUITE SIMILAR AS WELL AS REASONABLE WITH HIGHS IN THE LOW 60S. DEE HIGH PRESSURE PREVAILS THROUGH THE PERIOD WITH GENERALLY CLEAR SKIES AND NORMAL TEMPERATURES.
/ISSUED 614 PM CDT SAT APR 25 2015/ CURRENTLY THE MIDSOUTH WAS SANDWICHED BETWEEN A SHEARING UPPER LOW IN MISSOURI AND A DISTURBANCE RIDING ALONG THE GULF COAST. A STRAY THUNDERSTORM WILL REMAIN POSSIBLE OVER THE NORTH AND EASTERN COUNTIES THIS EVENING AHEAD OF A DESCENDING COLD FRONT. THE NEXT CLOSED UPPER LOW WILL MOVE INTO THE RED RIVER VALLEY.
READINGS WILL LIKELY MAX OUT IN THE LOWER 60S ACROSS THE AREA. DAYTIME HIGHS IN THE LOW TO MID 60S ARE ON TAP. BUT STILL SLIGHTLY WARMER THAN WHAT WE EXPECT TODAYS HIGHS TO BE. THE UPPER LEVEL LOW WELL TO OUR NORTH AND EAST WILL HAVE MEANDER BACK CLOSER TO THE NORTHEAST US COAST BY THE START OF THE PERIOD AND REMAIN THERE INTO MONDAY NIGHT. ONE DISTURBANCE WILL PASS BY TO OUR NORTH AND EAST ON MONDAY INTO MONDAY EVENING AS IT ROTATES AROUND THE UPPER LOW.
High pressure quickly builds into western Montana and north central Idaho Sunday night and lasts through mid week.
130 AM PDT SUN APR 26 2015 HIGH PRESSURE WILL BUILD OVER THE SIERRA AND WESTERN NEVADA TODAY, WITH AFTERNOON HIGHS WARMING INTO THE 70S AND 80S FOR MID WEEK.
MID LEVEL FLOW FEATURES A RIDGE OVER THE PLAINS WITH ELONGATED TROF OVER NEW ENGLAND EXTENDING WEST INTO THE GREAT LAKES. WITH HIGHS RANGING FROM THE MID 50S NORTHWEST TO THE LOWER 60S SOUTHEAST. MODELS SHOWING A S/W ROTATING THRU THE EASTERN GREAT LAKES MONDAY AROUND LARGE UPPER LOW OFF THE EAST COAST. TEMPERATURES STILL BELOW NORMAL WITH HIGHS ON MONDAY FROM THE MID 50S NORTHEAST TO THE LOWER 60S SOUTHWEST.
A COLD FRONT WILL DROP SOUTH DURING THE NEXT FEW HOURS WITH ISOLD TO SCT SHRA/TSRA STILL PSBL.
A BACK DOOR COLD FRONT WILL MOVE THROUGH THE REGION TODAY.
SCT CU FIELD TO DEVELOP AFTER 26/15Z WITH A WEAK COLD FRONT DROPPING SOUTH OF THE TXK/ELD TERMINALS NEAR THE END OF THE TAF PERIOD.
A WEAK WARM FRONT WILL CLIP WESTERN WASHINGTON TODAY AND TONIGHT WITH RAIN MAINLY ALONG THE COAST. HIGH PRESSURE WILL BRING WARMER AND DRIER WEATHER ON MONDAY.
CLOUDS WILL LINGER ACROSS THE AREA TODAY AS AN UPPER TROUGH SAGS INTO THE AREA FROM THE NORTH.