Aikyam-Lab/Synoptic-Bench huggingface dataset:
SFC WARM FRONT HAS LIFTED NORTH THROUGH EASTERN NEBRASKA AND KANSAS AND IS ENTERING SW IA. A COLD FRONT IS NOT FAR THOUGH AND HAS MOVED INTO SOUTHEAST SOUTH DAKOTA AND NORTHWEST NEBRASKA. MOISTURE INTO THE STATE TODAY IS PIECEMEAL WITH BETTER LOW LEVEL MOISTURE THIS MORNING BUT DRIER ALOFT THEN DRYING IN THE LOW LEVELS BEHIND THE COLD FRONT PASSAGE BUT BETTER MID LEVEL MOISTURE. READING WOULD BE SEVERAL DEGREES COOLER. PROXIMITY SOUNDINGS SUGGEST COOLER AS WELL.
WILL JUST BE LOOKING AT COOLER CONDITIONS ON SUNDAY ALONG WITH BREEZY NORTHWEST WINDS. WITH THE HIGH CENTER MOVING OVER EASTERN SOUTH DAKOTA AND MINNESOTA MONDAY NIGHT.
WILL NEED TO MONITOR THE TAFS THROUGH THE OVERNIGHT HOURS IN CASE THE LOW CLOUDS DO MATERIALIZE. DIFFLUENCE WELL AHEAD OF THIS LOW IS SWEEPING EWD THROUGH EAST TEXAS. THE CONTINUATION OF DRIER AIR ALOFT WILL HELP THIN OUT THE LOW CLOUDS TOMORROW. REACHING INTO THE LOWER 90S OUT WEST. NEXT PIECE OF THE H5 LOW BREAKS THROUGH THE RIDGE SUNDAY NIGHT.
1002 PM PDT SAT APR 9 2016 A low pressure system will bring showers to NorCal through the weekend with isolated thunderstorms. Low pressure area off the Southern California coast will continue to spread rain northward over parts of the northern interior. The low will slowly move inland over the next 24 hours with little change in the weather expected over Northern California. Another low pressure area will drop southward on Sunday off the coast to help keep unsettled weather over the area into Monday.
LOW PRESSURE NORTH OF THE GREAT LAKES WILL PUSH A WARM FRONT THROUGH THE AREA SUNDAY NIGHT, BRINGING SNOW AND RAIN.
TODAY THROUGH MONDAY NIGHT UPPER RIDGE REMAINS ACROSS THE WRN CONUS. W/NW FLOW SITS ACROSS THE NRN PLAINS AS A TROUGH SITS ACROSS SCNTRL CNDA. SKIES WILL CLEAR FROM NORTH TO SOUTH AS HIGH PRESSURE BUILDS IN. HIGH PRESSURE WILL BE IN CONTROL ACROSS THE ERN DAKOTAS INTO THE UPPER MIDWEST MONDAY. RETURN FLOW WILL SET UP ACROSS MT/WY BRINGING WARMER AIR BACK INTO THE AREA. WHILE LOCATIONS ACROSS NE WY MAY REACH INTO THE LOWER 60S.
A COLD FRONT WILL ALSO MOVE THROUGH THE REGION FROM THE NORTH TONIGHT. THE WEAKENING UPPER LEVEL LOW WILL MOVE ACROSS TX PNHDL MONDAY.
THIS HIGH PRESSURE WILL REMAIN WELL IN CONTROL OVER THE FLORIDA PENINSULA. AS HIGH PRESSURE TO THE NORTH SLIDES EAST INTO THE ATLANTIC. THE HIGHEST WIND SPEEDS WILL BE SOUTH OF THIS AREA.
328 AM PDT SUN APR 10 2016 Low pressure will move over far southern California and Nevada today.
HIGH PRESSURE WILL BUILD BRIEFLY INTO THE AREA OVERNIGHT. A LOW PRESSURE SYSTEM WILL APPROACH THE REGION ON SUNDAY AND A FRONTAL BOUNDARY WILL MOVE ACROSS THE REGION MONDAY INTO MONDAY NIGHT. LINGERING ISOLATED SNOW SHOWERS ACROSS THE EAST WILL CONTINUE TO DISSIPATE THROUGH THE REST OF THE EVENING AS HIGH PRESSURE BUILDS EAST AND THE LOW LEVEL FLOW BEGINS TO BACK. EXPECT LOWS TONIGHT GENERALLY IN THE LOW TO MID 20S. RAIN CHANCES WILL INCREASE SUNDAY NIGHT INTO MONDAY AS A LOW PRESSURE SYSTEM APPROACHES THE AREA.
Temperatures across the region will be noticeably cooler than those of the past few days, particularly for areas that experience the east winds. A ridge of high pressure will build over the Northern Rockies later today, providing relatively dry conditions for most of the region.
A COOL RIDGE OF HIGH PRESSURE WILL BUILD IN UNDER NW FLOW ALOFT. THE SAVING GRACE WILL BE THE COOLER TEMPS REACHING THE 50S TO LOW 60S FAR SW. ALLOWING THE LINGERING TROUGH TO EXIT TO OUR E AND NW FLOW TO RETURN TO THE AREA AS THE HIGH AMPLITUDE RIDGE OVER THE PACIFIC NW REMAINS.
THE UPPER LOW AND FAST MOVING SHEAR AXIS EXTEND FROM MO/TN/AL WITH THE TRAILING LOW OVER N MS. IN ITS WAKE WE WILL SEE SOME WARMING ALOFT AND RIDGING AHEAD OF THE NEXT VORT OVER S CA AND BAJA MOVING EASTWARD.
350 AM EDT SUN APR 10 2016 HIGH PRESSURE BUILDS INTO THE MID ATLANTIC STATES TODAY.
NAM only has lower 90s, while other models have warmer temps.
338 AM CDT WED AUG 5 2015 333 AM CDT HIGH PRESSURE OVER THE GREAT LAKES WILL CONTROL WEATHER THROUGH THURSDAY WITH GENERALLY LIGHT WINDS OUTSIDE OF AFTERNOON LAKE BREEZES. ANY CONVECTION ON THE PERIPHERY OF THE UPPER RIDGE OVER THE SOUTHERN PLAINS LOOKS TO STAY SOUTH AND WEST OF OUR AREA. TEMPS SHOULD REMAIN NEAR SEASONAL NORMS IN THE LOWER 80S. IZZI 333 AM CDT LARGELY LOOKING FOR A CONTINUATION OF THE CURRENT WEATHER PATTERN TROUGH THE WEEKEND. STRONG UPPER LOW OVER BRITISH COLUMBIA WILL TRACK EASTWARD ACROSS SOUTHERN CANADA WITH GUIDANCE SUGGESTING A SHORT WAVE TROUGH ON THE SOUTHERN PERIPHERY OF THIS WAVE PROVIDING FOCUS FOR MCS OVER THE PLAINS THURSDAY NIGHT.
341 AM CDT WED AUG 5 2015 LARGE HUDSON BAY CLOSED LOW SENDING A BROAD TROUGH INTO THE EASTERN CONUS. RIDGING INTO THE CENTRAL CANADIAN PLAINS AND A CLOSED LOW OVER BRITISH COLUMBIA WITH TROUGHING INTO NORTHERN CALIFORNIA. UPPER HIGH CENTERED OVER THE DESERT SOUTHWEST. WEAK UPPER WAVE MOVING ACROSS MISSOURI AND A WAVE ROUNDING THE RIDGE INTO THE CENTRAL PLAINS OF CANADA. SUN WILL BE OUT LATE THIS MORNING AND WITH THAT TEMPERATURES EXPECTED TO REBOUND INTO THE LOW 80S. ADDITIONAL DEVELOPMENT ALONG A COLD FRONT THURSDAY AFTERNOON WILL BE THE FIRST CHALLENGE FOR THIS PERIOD. A TRAILING COLD FRONT FROM THE LOW WILL MOVE SOUTHEAST ACROSS WESTERN INTO CENTRAL NEBRASKA DURING THE DAY THURSDAY. WITH MID LEVEL WESTERLIES INCREASING TO NEAR 45 KTS WITH THE PASSAGE OF THE TROUGH ALOFT.
A COLD FRONT WILL APPROACH FROM THE NORTHWEST AND SETTLE INTO NORTH CAROLINA TODAY. A COLD FRONT CURRENTLY ORIENTED W-E ACROSS THE OHIO VALLEY AND NORTHERN MID ATLANTIC REGION WILL SLOWLY DRIFT SOUTH TO THE VA/NC BORDER BY THIS EVENING.
For today, southwest flow in the low levels is expected to keep the boundary layer moist and the GFS seems too dry again.
UPPER LOW MOVING INTO CENTRAL CALIFORNIA THIS AFTERNOON AND EARLY EVENING. WATER VAPOR INDICATES THE UPPER LOW IS FAIRLY STRONG AND MAY HAVE ENOUGH DYNAMICS TO KEEP THE THREAT OF THUNDERSTORMS GOING THROUGH THE EVENING AND INTO TONIGHT. MEANWHILE ANOTHER LARGE UPPER LOW IS MOVING INTO SOUTHERN BC AND THE PACIFIC NORTHWEST TONIGHT AND WEDNESDAY. THIS SYSTEM WILL CREATE A DRY WESTERLY FLOW TOMORROW WITH CLEARING SKIES AND COOLER TEMPERATURES. EXPECT WESTERLY WINDS TO BE INCREASING AS THIS LOW MOVES INTO THE REGION WITH 15-25 MPH BY AFTERNOON FOR MANY LOCATIONS.
350 AM EDT WED AUG 5 2015 A COLD FRONT HAS MOVED OFFSHORE THIS MORNING. WEAK HIGH PRESSURE BUILDS OVER THE AREA INTO THURSDAY.
BUT THERE MAY BE JUST ENOUGH INSTABILITY IN THE LOW LEVELS TO ALLOW FOR A FEW SPRINKLES MAINLY NORTH OF I-80. UPPER TROUGH EASES EASTWARD A BIT TONIGHT. BUT FLOW IN THE LOWER AND MID LEVELS WILL CONTINUE TO HAVE MORE A WEST/NORTHWEST COMPONENT. WITH H850 TEMPS OF AROUND 13C SUPPORTING HIGHS IN THE LOWER 80S ACROSS THE SOUTH.
426 AM EDT WED AUG 5 2015 A COLD FRONT HAS MOVED OFFSHORE THIS MORNING. WEAK HIGH PRESSURE BUILDS OVER THE AREA INTO THURSDAY.
447 AM EDT WED AUG 5 2015 LATEST SURFACE ANALYSIS SHOWS RIDGE OF HIGH PRESSURE PRETTY MUCH IN CONTROL ACROSS THE AREA WITH WATER VAPOR LOOP SHOWING AREA UNDER SOUTHEASTERN EDGE OF DEFORMATION ZONE BETWEEN MID LEVEL HIGH NORTHEAST OF THE BAHAMAS AND ANOTHER HIGH STRETCHING INTO THE WESTERN GULF FROM THE SW U.
CURRENT WATER VAPOR SATELLITE LOOP SHOWS THE UPPER LEVEL LOW PUSHING INTO WESTERN NEBRASKA AT THIS HOUR. THUNDERSTORMS HAVE REDEVELOPED OVER EAST CENTRAL WYOMING AND WESTERN NEBRASKA THIS AFTERNOON DUE TO SOME COOLER AIR ALOFT PUSHING OVER THE AREA. MODELS SHOW THE UPPER LEVEL RIDGE AXIS REBUILDING OVER THE ROCKY MOUNTAIN REGION. THE RIDGE AXIS IS RELATIVELY WEAK. EXPECT TSTORM ACTIVITY TO BE RELATIVELY WEAK DUE TO WARMER AIR ALOFT.
WITH H850/H925 ONLY SLIGHTLY COOLER THAN YESTERDAY EXPECT HIGHS TO CLIMB INTO THE UPPER 90S TO AROUND 100 ALONG THE I-20 CORRIDOR. TEMPERATURES WILL BE A LITTLE COOLER ON THURSDAY WITH HIGHS IN THE MID 90S.
MID LEVEL RIDGING CURRENTLY CENTERED OVER SOUTHERN AZ WILL SLOWLY BEGIN TO SHIFT EAST TODAY RESULTING IN A MINOR INCREASE IN HEIGHT FIELDS OVER S TX. AND WHEN COMBINED WITH AN INCREASE IN RIDGING. RIDGING STRENGTHENS FURTHER ON THURSDAY WITH EVEN LESS CLOUD COVER AND HOTTER CONDITIONS. HAVE GONE ON THE WARMER SIDE OF GUIDANCE FOR MAX TEMPS EXCEPT FOR KCRP WHERE OVER TWO INCHES OF RAIN EARLIER IN THE WEEK HAVE LIMITED MAXIMUM WARMING POTENTIAL.
AN UPPER LOW CENTERED OVER B. THIS WILL BRING INCREASED ONSHORE FLOW AND COOLER TEMPS TO THE AREA.
532 AM EDT WED AUG 5 2015 AN UPPER LEVEL TROUGH WILL REMAIN PARKED OVER THE NORTHEAST CONUS THROUGH THE END OF THE WEEK.
HIGH PRESSURE LATE OVERNIGHT AND WEDNESDAY. A LOW PRESSURE SYSTEM PUSHES EAST THURSDAY AND THURSDAY NIGHT. LOOKS LIKE A BIT LESS VALLEY FOG FORMING OVERNIGHT GIVEN THE HIGH CLOUD. BIG STORY IN THE SHORT TERM WILL BE LOW PRESSURE SYSTEM AND ASSOCIATED RAINFALL WITH IT. FELT BEST COURSE OF ACTION WAS TO STAY CLOSE TO ENSEMBLES AND WPC WHICH TRACKS THE LOW GENERALLY OVER THE REGION LATER THU AND INTO THU NIGHT.
THE POOL OF SLIGHTLY HIGHER SURFACE DEWPOINTS ALONG THE RIDGES DID MANAGE TO INCREASE INSTABILITY ENOUGH THAT A SHOWER WAS GENERATED. AS THE MID AND UPPER TROUGH THAT HAS RESIDED OVER THE CENTRAL GREAT LAKES THROUGH THE DAY TRANSLATES EASTWARD OVERNIGHT. AMID CONTINUED HIGH PRESSURE. DRY AIR AND HIGH PRESSURE JUSTIFY ELIMINATING POPS ALMOST EVERYWHERE WEDNESDAY AND WEDNESDAY NIGHT. MAXIMA WILL BE SLIGHTLY BELOW NORMAL WITH THE PRESENCE OF THE UNSEASONABLY COOL UPPER TROUGH. 12Z NAM IS THE FASTEST AND HAS THE HIGHEST PRECIPITATION AMOUNTS. HAVE STILL BUMPED UP POPS TO CATEGORICAL ACROSS THE SOUTHEASTERN RIDGES.
207 AM EDT WED AUG 5 2015 HIGH PRESSURE WILL ALLOW FOR DRY CONDITIONS ACROSS THE AREA TONIGHT. AN AREA OF LOW PRESSURE WILL APPROACH THE REGION WEDNESDAY INTO WEDNESDAY NIGHT BEFORE MOVING JUST SOUTH OF THE AREA ON THURSDAY. WENT WARMER TEMPS THERE. AN AREA OF LOW PRESSURE WILL BEGIN TO APPROACH THE REGION WEDNESDAY INTO WEDNESDAY NIGHT. POTENT LOW PRESSURE CONTAINING COPIOUS MOISTURE WILL BE TRAVELING THROUGH KENTUCKY ON THURSDAY. WITH A CHANCE OF SHOWERS AND THUNDERSTORMS ACROSS THE NORTHERN HALF FARTHER FROM THE LOW. WENT CLOSER TO THE MOISTER SOLUTION OF THE NAM AND ECMWF AND AWAY FROM THE DRIER GFS WHICH HAS THE LOW TRACKING FARTHER TO THE SOUTH. WITH THE LOW CENTER TRACKING TO THE SOUTH OF THE OHIO RIVER.
THE PATTERN REMAINS WITH A TROUGH OVER THE EASTERN CONUS WITH THE BASE OF THE TROUGH ROUNDING OUT JUST ALONG THE TN VALLEY. HEADING INTO THE DAY A STRONG WAVE HAS TRAVERSED THE RIDGE OVER THE FRONT RANGE AND NOW STREAKS EAST INTO THE CENTRAL PLAINS AND THEN WESTERN KY. A RATHER HIGH FREEZING LEVEL AND LACK OF WINDS ALOFT WILL MAKE FOR MOSTLY SUB SEVERE STORMS THIS AFTERNOON AND EVENING. AS THE UPPER TROUGH DEEPENS AND THE TROUGH AXIS MOVES THROUGH KENTUCKY WITH THE BETTER SUPPORT ALOFT AND INSTABILITY FROM THE DAYS HEATING.
127 AM EDT WED AUG 5 2015 A COLD FRONT WILL SLOWLY PASS THROUGH THE REGION OVERNIGHT. WEAK HIGH PRESSURE BUILDS INTO THE AREA ON THURSDAY.
HIGH PRESSURE WILL REMAIN OVER THE GREAT LAKES WITH WEAK NWLY FLOW ALOFT. JUST TO THE SOUTH AND WEST OF THE HIGH IN THE SFC-925 MB LAYER. HIGHS IN THE LOWER 80S OVER SOUTH CENTRAL WI AND MID TO UPPER 70S OVER ERN WI. DRY HIGH PRESSURE WILL HOLD STRONG OVER SOUTHERN WI THROUGH THURSDAY EVENING. LIGHT EASTERLY WINDS WILL ALLOW FOR A LAKE BREEZE AND MAX TEMPS RANGING FROM THE UPPER 70S NEAR THE LAKE TO THE LOWER 80S WELL INLAND.
A DEEP UPPER LOW WAS POSITIONED OVER WESTERN BRITISH COLUMBIA THIS MORNING. THE WESTERN UPPER LOW WILL SLIDE ACROSS NORTHWEST MONTANA THURSDAY. THIS PROCESS WILL ALLOW A COLD FRONT TO MOVE THROUGH THE THURSDAY AFTERNOON. AND A PACIFIC TROF LIFTING OUT OF NORTHERN CALIFORNIA.
A HIGH PRESSURE RIDGE OVER SOUTHERN ARIZONA WILL KEEP US IN A DRY WEATHER PATTERN FOR ONE MORE DAY. BY THURSDAY A LOW PRESSURE SYSTEM MOVING THROUGH CALIFORNIA WILL BRING INCREASING CHANCES FOR THUNDERSTORMS TO WESTERN ARIZONA.
527 AM EDT WED AUG 5 2015 HIGH PRESSURE WILL CONTINUE TO PROVIDE THE REGION WITH COMFORTABLE TEMPERATURES AND DRY CONDITIONS TODAY INTO THIS EVENING. A WEAK LOW PRESSURE SYSTEM TRACKING THROUGH THE OHIO VALLEY MAY SPREAD SOME LIGHT RAIN INTO AREAS MAINLY SOUTH OF HIGHWAY 30 LATER TONIGHT INTO THURSDAY. FAIR/COMFORTABLE WX WILL PERSIST TODAY INTO THIS EVENING NORTH OF AN OHIO-MISSOURI VALLEY BAROCLINIC ZONE AS HEIGHT RISES ALOFT HELP MAINTAIN LOW LEVEL RIDGING LOCALLY.
104 AM EDT WED AUG 5 2015 AN UPPER LEVEL LOW WILL CONTINUE TO BRING UNSETTLED WEATHER TO THE NORTH COUNTRY THROUGH WEDNESDAY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
A LOW PRESSURE SYSTEM WILL MOVE ACROSS SD ON THURSDAY. THE UPPER LEVEL PATTERN WILL FEATURE A HIGH PRESSURE RIDGE ACROSS THE CENTRAL CONUS. DAMPENING THE RIDGE AT TIMES AND BRINGING PRECIP CHANCES TO THE REGION.
THE CENTER OF THE UPPER RIDGE THAT WAS SITUATED OVER THE SOUTHERN ROCKY MOUNTAINS WILL SHIFT EAST AND BECOME STATIONARY OVER THE SOUTHERN GREAT PLAINS.
102 AM EDT WED AUG 5 2015 AN UPPER LEVEL LOW WILL CONTINUE TO BRING UNSETTLED WEATHER TO THE NORTH COUNTRY THROUGH WEDNESDAY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
THEN A WEAK LOW PRESSURE SYSTEM WILL BRING ANOTHER COOLDOWN FOR THE WEEKEND.
RIDGING SURFACE TO ALOFT FROM THE WESTERN ATLANTIC ACROSS THE CENTRAL FLORIDA PENINSULA AND INTO THE GULF OF MEXICO.
A MODEST WARMING TREND IS FORECAST FOR WEDNESDAY AND THURSDAY AS HIGH PRESSURE BUILDS ACROSS THE REGION.
123 AM EDT WED AUG 5 2015 LOW PRESSURE WILL CONTINUE TO MOVE NORTHEAST AWAY FROM THE REGION TONIGHT.
323 AM PDT WED AUG 5 2015 HIGH PRESSURE ALOFT WILL BRING ANOTHER HOT DAY FOR INLAND LOCATIONS TODAY. LOW PRESSURE OFF THE CALIFORNIA COAST WILL MOVE INLAND THIS WEEKEND.
THE RIDGE BUILDS IN FROM THE WEST OVERNIGHT. TEMPERATURES WILL BE WARMER WITH VALUES ABOVE NORMAL FOR WEDNESDAY AFTERNOON AS THE BREEZY CONDITIONS AND TIGHT GRADIENT HELP TO KEEP THE ATMOSPHERE WELL MIXED. EXPECTING MINIMUM TEMPERATURES WEDNESDAY NIGHT TO BE BELOW NORMAL AND COOLER THAN GUIDANCE WITH GOOD RADIATIONAL COOLING DUE TO CLEAR SKIES AND NO ENHANCED DRAINAGE WINDS EXPECTED GIVEN THE RELAXED GRADIENT. ENOUGH MOISTURE WILL LINGER FOR SOME AFTERNOON THUNDERSTORMS OVER THE HIGHER TERRAIN OF WESTERN COLORADO.
634 AM EDT WED AUG 5 2015 UPPER TROUGH STILL CLOSE BY PROVIDING NORTHWEST FLOW ALOFT OVER UPPER GREAT LAKES.
456 AM EDT WED AUG 5 2015 UPPER TROUGH STILL CLOSE BY PROVIDING NORTHWEST FLOW ALOFT OVER UPPER GREAT LAKES.
HIGH PRESSURE REMAINS IN CONTROL WITH VFR CONDITOINS TO PREVAIL. MID LEVEL RIDGE CONTINUES TO BUILD IN OVER TEXAS. THIS RIDGE WAS CENTERED OVER ARIZONA AND NEW MEXICO THIS AFTERNOON AND EXPECT THIS TO MOVE OVER NORTHERN PORTIONS OF TEXAS BY TOMORROW. DRIER AIR WILL FILTER INTO THE AREA AND DRY AIR IS HEATED MORE EFFICIENTLY THEREFORE TEMPERATURES SHOULD CLIMB INTO THE LOW 100S FOR NEARLY ALL OF THE REGION THIS AFTERNOON AND AGAIN WEDNESDAY.
125 AM EDT WED AUG 5 2015 WEAK LOW PRESSURE CURRENTLY ALONG THE SOUTHERN NC COAST WILL CONTINUE MOVING NORTHEASTERLY OVERNIGHT AND AWAY FROM THE REGION WEDNESDAY.
331 AM EDT WED AUG 5 2015 AN UPPER LEVEL LOW WILL CONTINUE TO BRING UNSETTLED WEATHER TO THE NORTH COUNTRY THROUGH WEDNESDAY WITH SCATTERED SHOWERS AND THUNDERSTORMS.
345 AM CDT WED AUG 5 2015 THE BIG STORY PICTURE REMAINS THE SAME TODAY AND TONIGHT WITH AN UPPER LEVEL HIGH PRESSURE RIDGE GRADUALLY EXPANDING FROM THE SOUTHERN ROCKIES ACROSS THE SOUTHERN PLAINS. AN IMPULSE ON THE PERIPHERY OF THE RIDGE WILL REMAIN OVER THE MISSOURI VALLEY. RMCQUEEN UPPER HIGH WILL CONTINUE ITS HOLD SQUARELY OVER THE SOUTHERN PLAINS THURSDAY.
311 AM EDT WED AUG 5 2015 LOW PRESSURE ALOFT AND ITS ASSOCIATED COOL CYCLONIC FLOW WILL PRODUCE A CHANCE OF SHOWERS AND THUNDERSTORMS TODAY.
648 AM EDT WED AUG 5 2015 WEAK COLD FRONT SAGS SOUTH THROUGH SOUTHERN WEST VIRGINIA TODAY. AS HIGH PRESSURE BUILDS TOWARD THE OHIO VALLEY. A LOW PRESSURE SYSTEM PUSHES EAST ACROSS THE AREA THURSDAY AND THURSDAY NIGHT. AS HIGH PRESSURE SAILS SEWD THROUGH THE GREAT LAKES AND TOWARD THE UPPER OHIO VALLEY. THIS WILL YIELD A SLIGHTLY COOLER DAY COMPARED WITH TUE EVEN WITH A BREAK IN THE HIGH CLOUDS ALONG AND N OF THE FRONT. ALSO MAINTAINED THE LOW CHANCE FOR THUNDER TONIGHT OVER SW VIRGINIA.
HOWEVER DO EXPECT MUCH OF THE ACTIVITY CLOSER TO THE ENERGY ALOFT WHICH WILL REMAIN TO THE SOUTH/SOUTHWEST OF THE CWA WITH LOW LEVEL FLOW COMING MORE OFF THE DRY AREA OF HIGH PRESSURE OFF TO THE ENE. FAIRLY DENSE CIRRUS SHIELD IN PLACE CURRENTLY AND EXPECT THE HIGH CLOUD COVER TO REMAIN FAIRLY ENTRENCHED ACROSS THE CWA TODAY.
THE HIGH PRESSURE IN PLACE OVER THE LAST 24 HOURS WILL FLATTEN TODAY AS AN UPPER LEVEL TROUGH SWEEPS BY NORTHERN UTAH AND COLORADO THIS EVENING. THE PRESSURE GRADIENT SLACKENS ON THURSDAY AS HIGH PRESSURE AMPLIFIES BACK OVER THE REGION.
430 AM MDT WED AUG 5 2015 THE HIGH PRESSURE IN PLACE OVER THE LAST 24 HOURS WILL FLATTEN TODAY AS AN UPPER LEVEL TROUGH SWEEPS BY NORTHERN UTAH AND COLORADO THIS EVENING. THE PRESSURE GRADIENT SLACKENS ON THURSDAY AS HIGH PRESSURE AMPLIFIES BACK OVER THE REGION.
209 AM EDT WED AUG 5 2015 A COLD FRONT CROSSES THE AREA OVERNIGHT AS LOW PRESSURE MOVES OFF THE MID ATLANTIC COAST. THE FRONT STALLS ACROSS NORTH CAROLINA WEDNESDAY AND WEDNESDAY NIGHT AS HIGH PRESSURE MOVES EAST ACROSS PENNSYLVANIA.
628 AM EDT WED AUG 5 2015 HIGH PRESSURE WILL SUPPORT FAVORABLE AVIATION CONDITIONS THROUGH THE TAF PERIOD. TODAY AND TONIGHT UPPER LEVEL NEGATIVE PV ADVECTION TODAY WITH UPPER LEVEL RIDGE AXIS CRESTING OVER THE CENTRAL GREAT LAKES TONIGHT. 850 MB TEMPS JUST SLIGHTLY COOLER TODAY COMPARED TO YESTERDAY.
647 AM EDT WED AUG 5 2015 AN UPPER LEVEL TROUGH WILL REMAIN PARKED OVER THE NORTHEAST CONUS THROUGH THE END OF THE WEEK.
QUIET WEATHER FOR THE SHORT TERM PERIOD WITH HIGH PRESSURE RIDGE MOVING SLOWLY EAST OVER THE GREAT LAKES REGION. RETURN FLOW ON THE BACKSIDE OF THE HIGH WILL SWING WINDS TO A MORE SOUTHEAST/SOUTH DIRECTION OVER THE REGION.
334 AM CDT WED AUG 5 2015 333 AM CDT HIGH PRESSURE OVER THE GREAT LAKES WILL CONTROL WEATHER THROUGH THURSDAY WITH GENERALLY LIGHT WINDS OUTSIDE OF AFTERNOON LAKE BREEZES. ANY CONVECTION ON THE PERIPHERY OF THE UPPER RIDGE OVER THE SOUTHERN PLAINS LOOKS TO STAY SOUTH AND WEST OF OUR AREA. TEMPS SHOULD REMAIN NEAR SEASONAL NORMS IN THE LOWER 80S. IZZI 333 AM CDT LARGELY LOOKING FOR A CONTINUATION OF THE CURRENT WEATHER PATTERN TROUGH THE WEEKEND. STRONG UPPER LOW OVER BRITISH COLUMBIA WILL TRACK EASTWARD ACROSS SOUTHERN CANADA WITH GUIDANCE SUGGESTING A SHORT WAVE TROUGH ON THE SOUTHERN PERIPHERY OF THIS WAVE PROVIDING FOCUS FOR MCS OVER THE PLAINS THURSDAY NIGHT.
327 AM EDT WED AUG 5 2015 HIGH PRESSURE WILL CONTINUE TO PROVIDE THE REGION WITH COMFORTABLE TEMPERATURES AND DRY CONDITIONS TODAY INTO THIS EVENING. A WEAK LOW PRESSURE SYSTEM TRACKING THROUGH THE OHIO VALLEY MAY SPREAD SOME LIGHT RAIN INTO AREAS MAINLY SOUTH OF HIGHWAY 30 LATER TONIGHT INTO THURSDAY. FAIR/COMFORTABLE WX WILL PERSIST TODAY INTO THIS EVENING NORTH OF AN OHIO-MISSOURI VALLEY BAROCLINIC ZONE AS HEIGHT RISES ALOFT HELP MAINTAIN LOW LEVEL RIDGING LOCALLY.
Showers and a few thunderstorms have formed overnight in the southwest flow ahead of an approaching low pressure weather system.
THERE WILL BE MORE SUN IN THE MORNING THAN IN THE AFTERNOON AS THE NEXT LOW PRESSURE AREA APPROACHES NW MN. THE CLOUDS WILL BE ON THE INCREASE WEST TO EAST IN THE AFTERNOON AS THE LOW APPROACHES THE ND/MN BORDER BY 00Z. WITH SFC REFLECTION CLOSED LOW WILL TRANSLATE ALONG THE INTERNATIONAL BORDER WED NIGHT/THURS. A WARM FRONT WILL LINGER ACROSS THE NORTHERN ZONES THURSDAY.
604 AM EDT WED AUG 5 2015 LOW PRESSURE ALOFT AND ITS ASSOCIATED COOL CYCLONIC FLOW WILL PRODUCE A CHANCE OF SHOWERS AND THUNDERSTORMS TODAY.
223 AM EDT WED AUG 5 2015 A RIDGE OF HIGH PRESSURE WILL SLIDE EAST ACROSS THE REGION DURING MIDWEEK.
204 AM EDT WED AUG 5 2015 A WEAKENING COLD FRONT WILL DROP ACROSS THE AREA OVERNIGHT. THE FRONT WILL DISSIPATE WEDNESDAY AS HIGH PRESSURE BUILDS INTO THE GREAT LAKES AND OHIO VALLEY. THURSDAY LOW PRESSURE WILL MOVE INTO THE LOWER OHIO VALLEY AS THE HIGH MOVES EAST TO NEW ENGLAND.
401 AM EDT WED AUG 5 2015 WEAK COLD FRONT SAGS SOUTH THROUGH SOUTHERN WEST VIRGINIA TODAY. AS HIGH PRESSURE BUILDS TOWARD THE OHIO VALLEY. A LOW PRESSURE SYSTEM PUSHES EAST ACROSS THE AREA THURSDAY AND THURSDAY NIGHT. AS HIGH PRESSURE SAILS SEWD THROUGH THE GREAT LAKES AND TOWARD THE UPPER OHIO VALLEY. THIS WILL YIELD A SLIGHTLY COOLER DAY COMPARED WITH TUE EVEN WITH A BREAK IN THE HIGH CLOUDS ALONG AND N OF THE FRONT. ALSO MAINTAINED THE LOW CHANCE FOR THUNDER TONIGHT OVER SW VIRGINIA.
344 AM EDT WED AUG 5 2015 UPPER TROUGH STILL CLOSE BY PROVIDING NORTHWEST FLOW ALOFT OVER UPPER GREAT LAKES.
322 AM CDT WED AUG 5 2015 UPPER AIR DATA ANALYSIS HAS A CLOSED LOW/TROUGH OVER WESTERN QUEBEC THROUGH THE GREAT LAKES. HIGH PRESSURE OVERHEAD ACROSS THE FORECAST AREA WITH PARTLY CLOUDY SKIES THE RULE. TEMPERATURES AT 2 AM WERE IN THE LOWER/MIDDLE 50S ACROSS THE SAND COUNTRY OF CENTRAL WI. CENTER OF HIGH PRESSURE MOVES EAST OF THE REGION INTO THE GREAT LAKES BUT KEEPS ITS INFLUENCE OVER THE AREA WITH MOSTLY SUNNY SKIES RESULTING. QUIET WEATHER CONTINUES INTO TONIGHT WITH HIGH PRESSURE HOLDING ACROSS THE AREA. LOOK FOR LOWS IN THE MIDDLE 50S TO THE LOWER 60S.
TODAY AND TONIGHT UPPER LEVEL NEGATIVE PV ADVECTION TODAY WITH UPPER LEVEL RIDGE AXIS CRESTING OVER THE CENTRAL GREAT LAKES TONIGHT. 850 MB TEMPS JUST SLIGHTLY COOLER TODAY COMPARED TO YESTERDAY.
434 AM CDT WED AUG 5 2015 EARLY THIS MORNING A MID LEVEL AREA OF LOW PRESSURE WAS SHIFTING EAST SOUTHEAST ACROSS NEBRASKA AND KANSAS PER LATEST WATER VAPOR IMAGERY. WITH ADDITIONAL SHOWER AND THUNDERSTORM CHANCES THROUGH THIS EVENING AS THE MID LEVEL LOW TROF AXIS MOVES THROUGH THE REGION.
UPPER SYSTEM WILL PUSH EAST OF THE CWA THURSDAY MRNG WITH DRIER AND SLIGHTLY COOLER AIR FILTERING IN FROM THE W/NW.
AS HIGH PRESSURE SHIFTS BACK EAST OF THE AREA. COULD NOT FIND A SINGLE CG STRIKE IN THE CWA WITH JUST A FEW SHOWERS POPPING NEAR THE HIGH TERRAIN.
AN UPPER LEVEL TROUGH WILL REMAIN OVER SOUTHERN BRITISH COLUMBIA WITH AN UNSETTLED SOUTHWESTERLY FLOW ALOFT CONTINUING OVER MONTANA THROUGH LATE WEDNESDAY EVENING.
357 AM CDT WED AUG 5 2015 AN ACTIVE WEATHER PATTERN IS EXPECTED OVER THE NEXT 36 HOURS AS SEVERAL UPPER LEVEL DISTURBANCES WILL MOVE ACROSS THE REGION BEFORE THE MAIN UPPER LOW EXITS THE AREA LATE THURSDAY EVENING.
442 AM EDT WED AUG 5 2015 ANALYSIS OF REGIONAL UPPER-AIR DATA TRENDS OVER THE LAST 24 HOURS REVEAL GEOPOTENTIAL HEIGHT RISES ACROSS THE FLORIDA PENINSULA AND KEYS THANKS TO A FORTIFICATION OF THE WESTERN EXTENSION OF THE ATLANTIC SUBTROPICAL ANTICYCLONE. A SUBTLE TROUGH IS STILL EVIDENT FROM THE SOUTHEASTERN GULF OF MEXICO TO THE YUCATAN PENINSULA. A SLIGHT SOUTHEASTERLY WIND SURGE IS EVIDENT EAST OF THE TROUGH. AND RAIN-FREE CONDITIONS WITH HIGHS IN THE LOW/MID 90S AND LOWS IN THE MID 80S.
ALTHOUGH PRECIPITABLE WATER VALUES WILL BE SLIGHTLY LOWER THIS AFTN APPEARS THERE WILL STILL BE ENOUGH MOISTURE AROUND FOR WDLY SCT STORMS OVER THE HIGHER TERRAIN. AS FOR HIGHS 850-700 MB TEMPS ARE A DEGREE OR TWO WARMER TODAY SO WILL KEEP READINGS IN THE UPPER 80S TO LOWER 90S OVER NERN CO. THE UPPER RIDGE OVER THE SOUTHERN GREAT PLAINS GAINS STRENGTH AS IT EXPANDS WESTWARD OVER THE SOUTHERN ROCKY MTN REGION ON SUNDAY. RESULTING IN DRIER AND WARMER CONDITIONS ACRS THE FORECAST AREA. WHILE THE GFS WARMER YET AT 18. THAT WOULD SOMEWHAT EXPLAIN THE WARMER TEMPS OFFERED BY THE GFS BASED MOS GUIDANCE. EXCEPT PERHAPS A LIGHT SHOWER FROM A STRAY HEAT DRIVEN STORM IN THE HIGH COUNTRY.
AND SUNDAY MID TO HIGH LEVEL CLOUDS WILL BE ON THE INCREASE FROM WEST TO EAST TODAY AS HIGH PRESSURE DRIFTS EAST OF THE AREA.
AS 500 MB RIDGE RELOCATES ACROSS TEXAS AND NUDGES SOUTH.
IN ADDITION ANOTHER WEAKER SHORT WAVE TROUGH WILL MOVE OVER THE AREA DURING THE LATE AFTERNOON. UPPER RIDGE CENTER OVER EAST TEXAS THIS MORNING WITH UPPER TROUGH OVER THE PACIFIC NORTHWEST.
245 PM CDT SAT JUL 11 2015 WV imagery shows the upper ridge centered over NE Texas, and extending across most of the CONUS. Convection is trying to get going over the Sacramentos, and models suggest isolated orographic activity overnight invof the Guadalupes but, otherwise, the theta-e ridge exits to the NW overnight and Sunday as the upper ridge builds WNW into the region.
THE ATMOSPHERE HAS BECOME QUITE UNSTABLE TO THE EAST OF THE TROUGH. SO ALTHOUGH TEMPERATURES WILL BE WARMER THAN TODAY IN THE MID TO UPPER 90S.