Aikyam-Lab/Synoptic-Bench huggingface dataset:
A DEEP TROUGH HAS DROPPED SOUTHEAST FROM THE PACIFIC NW WITH AN EMBEDDED CLOSED LOW RACING NORTHEAST ACROSS THE CENTRAL PLAINS. A COLD FRONT ASSOCIATED WITH THE UPPER LOW WILL BE APPROACHING THE TX/LA BORDER EARLY WEDNESDAY MORNING.
HAVE A THETA-E RIDGE AXIS RUNNING FROM LOGAN COUNTY IN KENTUCKY TO JEFFERSON COUNTY IN INDIANA. WITH HIGHS MOST LOCATIONS ONLY IN THE LOWER 80S. THE UPPER TROUGH BEHIND THE FRONT SHOULD CROSS THE REGION TONIGHT. HIGHS THURSDAY ALSO WILL BE COOLER. AROUND 80 TO THE LOWER 80S.
A WEAK CLOSED LOW NEAR NEW ORLEANS WILL OPEN UP AND ALLOW ENERGY TO LIFT NORTHEASTWARD.
313 AM EDT WED SEP 9 2015 A COLD FRONT WILL APPROACH FROM THE WEST TODAY AND WILL STALL ALONG THE COAST TONIGHT AND THURSDAY.
A cold front was also moving south across western Kansas. This will push another cold front south through western Kansas late Thursday afternoon and Thursday night. Widely scattered thunderstorms are expected to develop along and ahead of the cold front across western Kansas by mid to late afternoon.
STRONG NORTHWEST FLOW ALOFT WITH A CLOSED UPPER LOW OVER WESTERN ONTARIO AND A RIDGE OVER THE DESERT SOUTHWEST. SURFACE BOUNDARY/COLD FRONT DROPPING SOUTH INTO THE NORTHERN PLAINS EARLY THIS MORNING AHEAD OF A MID LEVEL S/WV IMPULSE. COLD FRONTAL BOUNDARY WILL CONTINUE TO MOVE SOUTH INTO SOUTH DAKOTA BY THIS EVENING. AS THE TROUGH TO THE NORTHEAST.
421 AM CDT WED SEP 9 2015 WEAK COLD FRONT TO OUR SOUTH WITH LIGHT UPSLOPE NORTHEAST BREEZES CONTRIBUTING TO AREAS OF LOW CLOUDS. SHORT RANGE GUIDANCE A BIT WARMER TODAY IS ACCEPTABLE. SLIGHTLY COOLER ALSO STILL BELIEVABLE FOR TONIGHT. RMCQUEEN THURSDAY WE WILL SEE A BRIEF WARMUP BEFORE OUR NEXT COLD FRONT.
WEAK COOL ADVECTION WILL CONTINUE THROUGH MIDDAY WITH GRADUAL DRYING OF THE LOW LEVELS INTO THE AFTERNOON AND EVENING. AN INITIAL LOWER AMPLITUDE TROF WILL DROP SOUTHEAST ACROSS THE NORTHERN PLAINS TONIGHT. THE ASSOCIATED SURFACE COLD FRONT WILL SAG SOUTH INTO FAR NORTHERN KANSAS BY LATE AFTERNOON/EARLY THURSDAY EVENING AND WILL BE THE FOCUS FOR CONVECTION.
THURSDAY WILL SEE A COLD FRONT STALL OVER NORTHERN LA AND BECOME DIFFUSE. THE STALLED TROUGH AXIS ALONG WITH MOISTURE LOADING FROM THE GULF SHOULD BE ENOUGH TO KEEP POP NUMBERS HIGH FOR THU. A NEW COLD FRONT WILL MAKE ITS WAY INTO THE AREA BY SAT MORNING. WINDS WILL SHIFT TO NORTHERLY BEFORE THE ACTUAL COLD FRONT MOVES THROUGH. BUT IT SHOULD BE VERY COMFORTABLE AS DP TEMPS WILL BACK OFF INTO THE LOWER 50S. BOTTLE THE WEATHER SAT AND SUN BECAUSE THE COLD FRONT WILL RETURN RAPIDLY MON NIGHT AND TUE AS DEEP TROPICAL MOISTURE AND WARM AIR MOVE BACK OVER THE AREA AS THE PREVIOUS COLD FRONT MOVES NORTH AS A WARM FRONT.
THE UPPER TROUGH WILL HOLD STRONG THROUGH THE SHORT TERM KEEPING HIGHS RIGHT AROUND OR SLIGHTLY BELOW CLIMO AVERAGES. AN AREA OF LOW PRESSURE WILL MOVE ACROSS THE REGION WEDNESDAY. A WARM FRONT WILL NUDGE OUR SOUTHERN CWA THOUGH MODELS STILL DIFFER GREATLY WITH REGARDS TO PRECIP CHANCES WITH THIS SYSTEM. HIGH PRESSURE WILL THEN BUILD IN AGAIN ON THURSDAY FROM THE NORTH.
351 AM MDT WED SEP 9 2015 HIGH PRESSURE WILL CONTINUE TO BUILD OVER THE WEST COAST DURING THE NEXT 36 HOURS. POSITIONING OF THE RIDGE OF HIGH PRESSURE WILL KEEP HURRICANE LINDA SPINNING OFF OF THE BAJA PENINSULA WHILE PREVENTING HER MOISTURE FROM ENTERING THE REGION. AN UNEVENTFUL END OF THE WEEK IS PROJECTED AS HIGH PRESSURE BUILDS OVER THE WESTERN STATES.
THE LOCAL ATMOSPHERE IS VERY MOIST IN THE LOW LEVELS. A DEEP LAYER MEAN ANTICYCLONE WAS CENTERED OVER THE BAHAMAS. AS WELL AS THE INFLUENCE OF THE NEARBY ANTICYCLONE. FOR TONIGHT THROUGH THURSDAY NIGHT -- VERY LITTLE CHANGE IS EXPECTED TO EITHER SYNOPTIC-SCALE FORCING OR THE LOWER-TROPOSPHERIC MOISTURE.
442 AM CDT WED SEP 9 2015 A weak cold front continues to move south towards the area and should be make its way through Midland during the morning hours. The highest chances for rain today look to be along the I-10 corridor and the Davis Mountains, but could still see some scattered thunderstorms over parts of Southeast New Mexico, Permian Basin and Trans Pecos.
531 AM EDT WED SEP 9 2015 SHOWERS AND SOME THUNDERSTORMS ARE LIKELY TODAY AND THURSDAY WITH THE APPROACH AND SLOW PASSAGE OF A COLD FRONT.
A COLD FRONT WILL SLOWLY MOVE ACROSS THE REGION LATE WEDNESDAY THROUGH WEDNESDAY NIGHT BRINING WIDESPREAD SHOWERS AND SCATTERED THUNDERSTORMS. CONDITIONS WILL SLOWLY IMPROVE THURSDAY AS A LOW PRESSURE SYSTEM WHICH DEVELOPS ALONG THE BOUNDARY IN THE MID ATLANTIC STATES MOVES OFF THE NEW JERSEY COAST.
330 AM EDT WED SEP 9 2015 SHOWERS AND SOME THUNDERSTORMS ARE LIKELY TODAY AND THURSDAY WITH THE APPROACH AND SLOW PASSAGE OF A COLD FRONT.
1201 AM CDT WED SEP 9 2015 /12Z TAFS/ Scattered showers and isolated thunderstorms will move south overnight ahead a cold front that will move into the I-20 corridor around daybreak. A cold front was located across the Texas Panhandle and extreme northwest Oklahoma. To the north of the front, temperatures were much cooler, upper 70s and lower 80s.
143 AM EDT WED SEP 9 2015 HIGH PRESSURE THAT BROUGHT US THIS RECENT STRING OF DRY AND VERY WARM DAYS WILL DRIFT OFF THE EAST COAST. A COLD FRONT WILL MOVE SLOWLY EAST ACROSS THE REGION WEDNESDAY AFTERNOON AND NIGHT. A WAVE OF LOW PRESSURE WILL FORM ALONG THIS FRONT AND BRING A SHOWERY AND MUCH COOLER DAY FOR THURSDAY.
155 AM CDT WED SEP 9 2015 Surface cold front will be making its way across the FA today into tonight. Front's southeastward progress kind of hangs up along our boundary and overrunning occurs as a result of broader upper level troffing yet to push thru.
THE MID TO UPPER LEVEL RIDGE OVER NORTHERN MEXICO INTO SOUTH TEXAS WILL GRADUALLY LOSE INFLUENCE OVER THE REGION THE NEXT TWO DAYS. THE MID/UPPER LEVEL TROUGH OVER THE WESTERN GULF EARLY THIS MORNING WILL DRIFT TO THE WEST TODAY. WHILE A SHORT WAVE TROUGH MOVING TOWARD THE RED RIVER REGION THIS MORNING. WILL MOVE SOUTHEAST AND MAINTAIN THE MID LEVEL TROUGH OVER THE WESTERN GULF ON THURSDAY. A FRONTAL BOUNDARY ASSOCIATED WITH THE SHORT WAVE TROUGH WILL MOVE INTO CENTRAL TEXAS ON THURSDAY.
WITH UPR TROFS OCCASIONALLY DEEPENING SWD TO LOWER LATITUDES. THERE WL BE SOME RETURN FLOW OF MOISTURE ARND THE WRN SIDE OF DEPARTING ANTICYCLONE. AND A LITTLE WARMER TEMPS THURSDAY.
128 AM EDT WED SEP 9 2015 A COLD FRONT WILL MOVE ACROSS THE AREA DURING THE DAYLIGHT HOURS ON WEDNESDAY. HIGH PRESSURE WILL BRIEFLY BUILD OVER THE REGION FOR LATER THURSDAY WITH SEASONABLE TEMPERATURES.
A BRIEF BREAK IN PRECIPITATION WILL COME LATE TONIGHT THROUGH THURSDAY NIGHT WITH HIGH PRESSURE OVER THE AREA.
145 AM EDT WED SEP 9 2015 AVIATION SHOWERS AND A FEW GUSTY THUNDERSTORMS WILL GRADUALLY SWEEP FROM WEST TO EAST ACROSS LOWER MICHIGAN THIS EVENING AS A COLD FRONT BRINGS AND END TO OUR STRING OF HOT AND HUMID DAYS. CANADIAN HIGH PRESSURE WILL BRING SEASONABLE TEMPERATURES AND MUCH DRIER AIR ON WEDNESDAY AND THURSDAY.
PRECIP CHANCES INCREASE DUE TO A WEAK SURGE OF MONSOON MOISTURE INTERACTING WITH A TROUGH. CLEAR AND QUIET AS 500MB RIDGE BUILDS OVER NEVADA. RIDGE AXIS TURNS FROM A WEST TO EAST ORIENTATION TO MORE A NORTHWEST TO SOUTHEAST ORIENTATION BY THURSDAY. THIS ALLOWS A SMIDGE OF HIGH LEVEL MOISTURE TO CREEP INTO SOUTHERN PORTIONS OF NORTHERN NYE COUNTY TODAY BEFORE THE RIDGE RE-ORIENTATES AND PUSHES IT WESTWARD ON THURSDAY.
A COLD FRONT WILL APPROACH FROM THE NORTHWEST THURSDAY.
513 AM EDT WED SEP 9 2015 A WARM FRONT WILL LIFT NORTH OF THE REGION TODAY WHILE LOW PRESSURE TRACKS THROUGH QUEBEC.
A COLD FRONT DROPPING SOUTHWARD ACROSS THE NORTHLAND WILL GENERALLY REACH THE KDLH AREA BY 00Z THURSDAY. COMBINED WITH THE COLD FRONT.
RIDGING AT THE SURFACE AND ALOFT WILL CONTINUE TO BUILD OVER THE STATE TODAY FROM THE ATLANTIC. THE UPPER RIDGE WILL MOVE OVER THE STATE FOR TONIGHT AND THURSDAY BRINGING DRIER AIR AND SUBSIDENCE TO THE AREA AND LIMITING RAIN CHANCES THROUGH THE PERIOD. TEMPERATURES WILL BE A BIT WARMER AS A RESULT.
Surface cold front was located from western OK into southeast KS into northwest MO. Rain should end from northwest to southeast during the day Wednesday as the upper level trough pushes to the southeast.
AN APPROACHING FRONT SINKING TOWARD THE OH VALLEY AND THE REMNANTS OF THE UPPER LOW SHOULD KEEP LIKELY POPS OVER THE NORTHERN HALF OF THE FORECAST AREA.
THE 00Z GFS HAS INITIALIZED BEST THIS MORNING ON THIS CONVECTION AND THE POSITION OF THE ATTENDANT UPPER TROUGH. THIS TROUGH SHOULD CONTINUE A SLOW SEWRD ADVANCE THROUGH THE REGION TODAY AS IT BEGINS TO AMPLIFY. WHICH COULD HELP BECOME MORE ENHANCED ON RESIDUAL MESOSCALE BNDRYS AND INTERACT WITH AVAILABLE HEATING/INSTABILITY AS THE UPPER TROUGH SHIFTS SE. SCT CONVECTION WILL REMAIN POSSIBLE FARTHER S OVER LOWER E TX/N LA CLOSER TO THE UPPER TROUGH/850MB TROUGH AXIS. AND THESE WILL REMAIN THE FAVORED AREAS FOR CONVECTION THROUGH THURSDAY ESPECIALLY AS THE 850MB TROUGH SLOWS IN VC OF THE I-20 CORRIDOR OF E TX/N LA. ESPECIALLY AS MUCH DRIER AIR WILL DEEPEN BEHIND THE UPPER TROUGH PASSAGE THURSDAY MORNING AS IT NEARS THE SE TX/SRN LA COASTS.
REDEVELOPMENT IS LIKELY TO OCCUR AFTER DAYBREAK DUE TO DIURNAL HEATING AND THE APPROACH OF A COLD FRONT.
AN UPPER LEVEL LOW CONTINUES TO SPIN SOUTH OF THE LOUISIANA COAST.
A SURGE OF MUCH COOLER CANADIAN AIR WILL BEGIN WORKING INTO THE FA ON THURSDAY.
BUT NOT CONFIDENT THAT THE HIGH CLOUDS WILL HAVE ENOUGH OF AN IMPACT ON MIXING TO KEEP FROM ISSUING THE WARNING. HIGH PRESSURE AT THE SURFACE RESIDES OVER WESTERN MONTANA WITH A RIDGE OVER WYOMING THIS AFTERNOON. TEMPERATURES OBSERVED IN THE LOW TO MID 70S SO FAR AS OF 1 PM. GETTING FAIRLY WIDESPREAD GUSTS EXCEEDING 25 MPH ALONG AND WEST OF THE LARAMIE RANGE WITH HUMIDITIES FALLING INTO THE LOW TO MID TEEN PERCENT RANGE.
PROBABLY WITH AN ANTICYCLONE BRINGING NE WINDS INTO DENVER. A DRIER NORTHWESTERLY FLOW WILL BE IN PLACE THROUGH THE WEEKEND AS A RIDGE OF HIGH PRESSURE SITS OVER THE GREAT BASIN.
UPPER WAVE ROTATES AROUND UPPER LOW OVER SOUTHERN HUDSON BAY AND MOVES THROUGH THE NORTHERN PLAINS TODAY. HIGHS IN THE LOW 80S NORTH AND UPPER 80S SOUTHWEST. THURSDAY WE START WITH AN UPPER LEVEL AMPLIFIED RIDGE ACROSS THE WEST COAST WITH NORTHWEST FLOW OVER THE HIGH PLAINS.
WHILE SHOWERS/STORMS CURRENTLY APPROACHING THE MISSISSIPPI RIVER ALSO SPREAD INTO THE AREA AS A UPPER TROUGH AXIS SHIFTS EASTWARD ACROSS THE TENNESSEE VALLEY. SHOWERS AND STORMS WILL CONTINUE INTO TONIGHT AS H5 TROUGH AXIS CONTINUES TO THE EAST. WITH ACTIVITY GRADUALLY SHIFTING SOUTHEAST OUT OF THE CWA FROM THURSDAY INTO THURSDAY NIGHT AS A WEAK COLD FRONT PUSHES SOUTHEASTWARD.
THE HIGH CLOUDS WILL GRADUALLY SHIFT TO THE EAST THROUGH THE MORNING. HIGH PRESSURE AND CLEAR SKIES WILL THEN PREVAIL TODAY INTO THE EVENING.
INCREASING AMPLIFICATION OF THE LONGWAVE PATTERN WILL SUPPRESS THE SUBTROPICAL RIDGE AS WE GO THROUGH THE SHORT TERM. THE LOWERING HEIGHTS WILL ALLOW A COLD FRONT TO EASILY MOVE INTO THE AREA AND BRING GREATER RAIN CHANCES FOR THE ENTIRE AREA.
349 AM CDT WED SEP 9 2015 A BROAD UPPER LEVEL TROUGH WILL CONTINUE TO GRADUALLY SHIFT EAST OF THE REGION THROUGH THE PERIOD AS A LARGE RIDGE BUILDS IN OVER THE WEST COAST. A WEAK COLD FRONT WILL MAKE ITS WAY THROUGH THE REGION TODAY.
THE EFFECTIVE COLD FRONT HAS PUSHED THROUGH ALL THE TAF SITES. TEMPS WERE ADJUSTED TO REFLECT SLIGHTLY COOLER AIR BEHIND THE FRONT.
UPPER AIR ANALYSIS LAST EVENING SHOWED A RIDGE OVER TEXAS WITH A TROUGH MOVING OVER THE TOP OF IT. THE TROUGH AXIS EXTENDED FROM CENTRAL CANADA TO NORTHERN NEW MEXICO. HIGH PRESSURE WAS CENTERED TO THE EAST AND WINDS WERE FROM THE SOUTHEAST. THE NORTHERN STREAM UPPER LEVEL TROUGH AND THE GULF LOW WILL JOIN DURING THIS PERIOD AND PUSH THE RIDGE OFF TO THE WEST.
Cold front about to move through KLUB with scattered showers and storms mainly off to the east.
THE REGION RESIDED UNDER A WEAKNESS OR UPPER LEVEL TROUGH BETWEEN A RIDGE CENTERED NEAR THE BAHAMAS AND ANOTHER RIDGE CENTERED OVER NORTHERN MEXICO. AN UPPER LEVEL LOW WAS APPROACHING NORTHWESTERN ONTARIO. THE RIDGE OVER NORTHERN MEXICO SHOULD BUILD NORTH ALONG THE PACIFIC COAST WHILE THE RIDGE IS CENTERED OVER THE BAHAMAS IS EXPECTED TO REMAIN IN PLACE. HIGH PRESSURE WILL BRING PARTLY CLOUDY TO MOSTLY CLEAR SKIES THROUGH 12Z. CLOUDS AND PRECIPITATION WILL BECOME WIDESPREAD AFTER 18Z AS A COLD FRONT MOVES IN FROM THE NORTHWEST AND INTERACTS WITH MOIST SOUTHERLY FLOW OFF THE GULF OF MEXICO.
UPPER LEVEL LOW PRESSURE SYSTEM OVER CENTRAL MAN FORECAST TO MOVE INTO EASTERN QUEBEC AND WEAKEN. UPPER RIDGE WILL BUILD IN THE WEST AND ANOTHER TROUGH WILL MOVE INTO THE CENTRAL PLAINS AND DEEPEN. UPPER LEVEL TROUGH OVER NORTHWEST TERRITORIES WILL DROP INTO THE NORTHERN PLAINS BY FRI MORNING WHILE AN UPPER LEVEL RIDGE WILL BUILD/MOVE INTO THE WESTERN NORTH AMERICA. A COLD FRONT WAS LOCATED ALONG THE INTERNATIONAL BORDER. A LITTLE COOLER AIR WILL MOVE OUT OF CANADA FOR TONIGHT AND THU.
VERY WARM AND DRY CONDITIONS WILL PERSIST THROUGH MUCH OF THE WEEK AS HIGH PRESSURE REMAINS OVER MUCH OF THE WEST COAST. A GRADUAL COOLING TREND WILL BEGIN NEAR THE COAST LATE IN THE WEEK AND THEN SPREAD INLAND THIS UPCOMING WEEKEND AS ONSHORE FLOW INCREASES AND THE RIDGE ALOFT WEAKENS.
HIGH PRESSURE RIDGING OVER THE PACIFIC NORTHWEST WILL SLOWLY SHIFT EAST JUST A BIT RESULTING IN A SLIGHT RISE IN HEIGHTS WHICH WILL LEND ITSELF TO TEMPERATURES WARMING TO AROUND NORMAL FOR THIS TIME OF YEAR. A WEAK BACKDOOR FRONT WILL WORK ITS WAY ACROSS OUR EASTERN COUNTIES LATE WEDNESDAY AFTERNOON INTO WEDNESDAY EVENING WHICH WILL RESULT IN A LIGHT EASTERLY SURFACE FLOW ALONG WITH SLIGHTLY COOLER TEMPERATURES ACROSS THE EAST FOR THURSDAY. WEST COAST RIDGE WILL BRING NORTHWEST FLOW TO THE AREA FOR THE END OF THE WORK WEEK. FASTER FLOW OFF THE PACIFIC WILL KNOCK DOWN RIDGE AND ALLOW STRONGER WESTERLY WINDS TO DEVELOP FOR THE WEEKEND.
330 AM EDT WED SEP 9 2015 ATLC RIDGE AXIS HAS REESTABLISHED ITSELF OVER THE W ATLC. A SLOW MOVING FRONTAL TROF EXTENDING FROM THE ARKLATEX REGION TO THE GREAT LAKES WILL KEEP THE RIDGE AXIS SUPPRESSED OVER THE SRN HALF OF THE FL PENINSULA. NO SIG CHANGE ANTICIPATED AS THE POSITION OF THE RIDGE WILL EFFECTIVELY BLOCK OUT ANY ENERGY RIPPLES FROM THE CENTRAL PENINSULA. AN H70 THERMAL RIDGE EXTENDS FROM FT. WHILE THE POSITION OF THE RIDGE AXIS OVER THE SRN PENINSULA WILL FAVOR THE EAST FL COAST FOR HIGHEST POPS. RIDGING ALOFT STARTS TO GET SHUNTED TOWARDS THE SOUTH AND EAST AS TROUGHING BEGINS TAKING SHAPE OVER THE EASTERN CONUS. COOLER MID-LEVEL TEMPS. AND INCREASING DIVERGENCE ALOFT IN ASSOCIATION WITH A DEEPENING TROUGH/CUT-OFF LOW OVER THE EASTERN CONUS WILL PORTEND AN INCREASE IN CONVECTIVE VIGOR AND COVERAGE EACH AFTERNOON.
404 AM EDT WED SEP 9 2015 HIGH PRESSURE WILL SLIDE OFF THE MID ATLANTIC COAST TODAY. A COLD FRONT APPROACHES FROM THE NORTHWEST WEDNESDAY.
149 AM EDT WED SEP 9 2015 UPPER LEVEL RIDGE BREAKS DOWN TONIGHT. AS A COLD FRONT APPROACHES FROM THE WEST.
AN AREA OF LOW PRESSURE WILL MOVE ACROSS THE REGION ON THURSDAY KEEPING PRECIPITATION CHANCES ACROSS PORTIONS OF THE REGION. ASSOCIATED SFC COLD FRONT TO PUSH THRU ILN/S FA WED AFTN. AN AREA OF LOW PRESSURE WILL MOVE UP ACROSS THE AREA ON THURSDAY KEEPING PRECIPITATION ACROSS THE AREA. TEMPERATURES WILL WARMER ACROSS SE PORTIONS OF THE FA ON WEDNESDAY WHERE IT WILL TAKE LONGER FOR THE PRECIPITATION TO MOVE INTO THE AREA. COOLER AIR WILL BE IN PLACE FOR THURSDAY AFTER THE FRONTAL BOUNDARY MOVES THROUGH AND WITH SOME RESIDUAL CLOUD COVER AND PRECIPITATION.
THERE ARE GUSTY WINDS OVER THE MARINE WATERS AND OVER SOME OF THE WEST SIDE RIDGES. THE HIGHEST GUSTS OVER THE INLAND AREAS ARE RUNNING IN THE 20-25 MPH RANGE. BUT THE STORM TRACK REMAINS WELL TO THE NORTH WITH A BROAD RIDGE OVER THE EASTERN PACIFIC OCEAN AND THE WESTERN U. THE UPPER RIDGE OVER THE AREA WILL AMPLIFY IN PLACE INTO THURSDAY NIGHT.
618 AM EDT WED SEP 9 2015 A COLD FRONT OVER THE GREAT LAKES WILL PUSH SLOWLY SOUTHEAST ACROSS CENTRAL PENNSYLVANIA LATE TODAY AND TONIGHT. A WAVE OF LOW PRESSURE WILL FORM ALONG THE FRONT AND TRACK ACROSS THE DELMARVA PENINSULA THURSDAY. HIGHEST /LIKELY/ POPS ARE PAINTED ACROSS THE NW MTNS CLOSEST TO APPROACHING COLD FRONT. RAINFALL AND LOW LVL CAA NORTH OF FRONTAL BNDRY WILL YIELD A MUCH COOLER DAY THAN WE/VE BECOME USED TO.
SEEMS TO BE A PRETTY SHARP MOISTURE GRADIENT ACROSS THE AREA ATTM WITH DEWPOINTS AROUND 20 DEGREES COOLER IN THE WEST. WV IMAGERY AND RAP H5 ANALYSIS SHOWS NW FLOW ACROSS CENTRAL ROCKIES AND OVER OUR CWA ON WESTERN EXTENT OF LARGE SCALE TROUGH. EARLY IN THE EVENING STEEP LAPSE RATES LEE TROUGH REBUILDS ALONG KS/CO BORDER OVERNIGHT WITH SOUTHERLY FLOW BRINING HIGH BL MOISTURE IN PLACE. SEVERAL SHORT WAVE TROUGHS MOVE ACROSS THE CENTRAL HIGH PLAINS REGION WEDNESDAY NIGHT.
325 AM CDT WED SEP 9 2015 Weather pattern across the Central US starting to take a shift as large scale upper low across south central Canada continues to usher cooler air southward into the northern States. Wettest period of the extended periods is early on, mainly Thursday afternoon and night, and there remain some differences in handling of the weak upper wave and stronger cold front.
325 AM EDT WED SEP 9 2015 A COLD FRONT WILL MOVE ACROSS THE AREA DURING THE DAY TODAY. THE FRONT WILL REACH THE OHIO RIVER BY THIS EVENING AND THEN STALL AS WEAK HIGH PRESSURE BUILDS BRIEFLY OVER NORTHERN OHIO AND THE LOWER GREAT LAKES.
A LOW PRESSURE SYSTEM AND WEAK COLD FRONT LOCATED ACROSS THE OK/AR/TX REGION WILL CONTINUE TO PUSH EAST OVERNIGHT.
PATTERN SYNOPSIS/FORECAST: MIDNIGHT SURFACE/COMPOSITE ANALYSIS SHOWS A COLD FRONT FROM NORTHEAST ONTARIO SOUTHWEST ACROSS LOWER MICHIGAN/ CENTRAL ILLINOIS/CENTRAL MISSOURI. SHORT WAVE TROUGH AXIS PUSHING COLD FRONT ACROSS THE REGION LIES ACROSS THE UPPER MISSISSIPPI VALLEY THAT IS KEEPING SOME LAYERED CLOUDINESS ACROSS THE FORECAST AREA THOUGH PRECIPITATION HAS MOSTLY PUSHED TO THE EAST OF NORTHERN MICHIGAN. RISING PRESSURES EXPECTED TODAY AS WEAK HIGH PRESSURE SETTLES ACROSS LOWER MICHIGAN BY TONIGHT.
SHORT TERM: (Through Late Tonight) Cold front really struggling to make too much progress south today and is currenlty aligned from near Kansas City to the Quad Cities.
630 AM EDT WED SEP 9 2015 A COLD FRONT WILL MOVE ACROSS THE AREA DURING THE DAY TODAY. THE FRONT WILL REACH THE OHIO RIVER BY THIS EVENING AND THEN STALL AS WEAK HIGH PRESSURE BUILDS BRIEFLY OVER NORTHERN OHIO AND THE LOWER GREAT LAKES.
850MB TEMPS INCREASE EACH DAY AND EXPECT HIGHS TO BE SEVERAL DEGREES WARMER.
TODAY THROUGH THURSDAY NIGHT FORECAST AREA UNDER NORTHWEST FLOW BETWEEN TROF OVER UPPER MISSISSIPPI VALLEY AND BROAD RIDGE OVER EASTERN PACIFIC- WESTERN US. A SURFACE TROF EXTENDING SOUTHWARD FROM THE LOW WILL CROSS WESTERN SD TODAY. DEWPOINTS AHEAD OF THE TROF WILL INCREASE. COOL HIGH PRESSURE MOVES SOUTHWARD THURSDAY.
244 AM EDT WED SEP 9 2015 COLD FRONT APPROACHES FROM THE WEST TODAY.
Will carry areas of fog in most areas this morning, but may need a dense fog advisory in places especially near and west of Dodge City where the NAM and the RAP model shows the highest boundary layer relative humidity. Overnight lows will be in the lower 60s with light southeast winds becoming south around 8 to 12 mph. Ahead of the cold front, warmer and moist south winds of 15 to 25 mph, will push highs to around 90. Most models have thunderstorms developing by afternoon ahead of the cold front, with a possible MCS (Mesoscale Convective Complex) developing near and east of Dodge City by late afternoon and evening. The cold front will continue to push across western Kansas overnight with numerous thunderstorms developing. Some low stratus is also suggested towards dawn behind the cold front.
331 AM CDT WED SEP 9 2015 COOLER WEATHER WILL CONTINUE TO MOVE INTO THE AREA OVER THE NEXT SEVERAL DAYS. A FEW SHOWERS AND THUNDERSTORMS WILL CONTINUE ACROSS FAR SOUTHERN OKLAHOMA AND WESTERN NORTH TEXAS CLOSER TO THE 700 MB MOISTURE AXIS AND JUST NORTH OF THE SURFACE COLD FRONT. HIGHS TODAY WILL BE COOLER JUST ABOUT EVERYWHERE EXCEPT FAR NORTHWESTERN OKLAHOMA. THURSDAY WILL BE MOSTLY TO PARTLY SUNNY AND WARMER WITH READINGS NEAR OR SLIGHTLY ABOVE AVERAGE FOR THIS TIME OF YEAR. BUT STILL COOLER THAN THE PAST SEVERAL DAYS.
Weak cold frontal boundary extended from just south of Knox City to just south of Snyder, and was moving slowly to the southeast. We are carrying the highest PoPs across the east-central and southeast parts of our area. With increased cloud cover and prospects for precipitation, temperatures will be cooler today. (Thursday through Wednesday) Whatever is left of the weak cold front will sag into the I-10 corridor from Ozona to Junction for Thursday. Not much cooling with the front, with mainly increased cloud cover keeping temperatures down in the low 90s.
AS UPPER RIDGE BUILDS OVER THE PACIFIC COAST. AN EASTERLY PUSH WILL BRING A COUPLE DAYS OF COOLER AND CLOUDY WEATHER TO THE PLAINS FRI AND SAT.
The local area will reside between a long wave trough extending through the Lower Mississippi Valley and a ridge centered just east of the Florida peninsula.
UPPER RIDGE WILL CONTINUE TO AMPLIFY ACROSS THE REGION. HIGHS WILL BE 5-10 DEGREES WARMER TODAY AND A COUPLE MORE DEGREES WARMER ON THURSDAY.
202 AM CDT WED SEP 9 2015 Surface cold front will be making its way across the FA today into tonight. Front's southeastward progress kind of hangs up along our boundary and overrunning occurs as a result of broader upper level troffing yet to push thru.
Clear skies will allow for plenty of sunshine today and for the rest of the week as the region stays under the influence of high pressure.
A DISTURBANCE AT 500MB EMBEDDED WITHIN A LARGER TROUGH WILL CONTINUE TO MOVE NORTHWARD TONIGHT ACROSS THE EASTERN PART OF THE FORECAST AREA. SCATTERED SHOWERS FROM THIS AFTERNOON ASSOCIATED WITH LOW PRESSURE SYSTEM HAVE FOR THE MOST PART DISSIPATED WITH ONLY A FEW ISOLATED SHOWERS LEFT. TROUGHING WILL REMAIN PRESENT AND ANOTHER ROUND OF SHOWERS WILL BE POSSIBLE AGAIN DURING THE DAY ON WEDNESDAY. 08 SCATTERED TO NUMEROUS SHOWERS AND STORMS ARE EXPECTED THROUGH MUCH OF THE WEEK WITH THE HIGHEST CHANCES OF WETTING RAINFALL ON THURSDAY AS A COLD FRONT APPROACHES FROM THE NORTHWEST. THE MOST WIDESPREAD CONVECTION DURING THE FORECAST PERIOD WILL BE ON THURSDAY AS A COLD FRONT PUSHES SOUTHWARD INTO NORTHERN MISSISSIPPI AND TENNESSEE.
LATEST WATER VAPOR SATELLITE IMAGERY SHOWS A 500MB RIDGE CENTERED OVER WEST TEXAS INTO NORTHERN MEXICO AND A 500MB LOW OVER THE WESTERN GULF OF MEXICO. BROWNSVILLE RADAR SHOWS VERY ISOLATED ACTIVITY ACROSS THE LOWER TEXAS GULF WATERS THIS MORNING.
135 AM EDT WED SEP 9 2015 WEAK LOW PRESSURE SYSTEM ROTATING NORTHWARD ON THE WESTERN EDGE OF THE FORECAST AREA CONTINUES TO BE THE MAJOR PLAYER FOR OUR WX TONIGHT. HOWEVER WITH THE APPROACH OF THE COLD FRONT TOWARD LATE WEDNESDAY NIGHT. 17 THE EXTENDED STARTS OFF WITH AN UPPER LEVEL TROUGH AND A SURFACE FRONT MOVING INTO NW GA THURSDAY MORNING. THIS FRONT DOES NOT MAKE MUCH HEADWAY SOUTH AND EAST UNTIL A SECOND FRONT AND STRONGER UPPER LEVEL TROUGH MOVE INTO THE AREA SUN.
SURFACE ANALYSIS PLACES A WEAK COLD FRONT FROM LOWER MICHIGAN BACK THROUGH THE MIDDLE MISSISSIPPI VALLEY AND CENTRAL/SOUTHERN PLAINS. WATER VAPOR SATELLITE TRENDS INDICATE AN UPPER LEVEL LOW CENTERED OFF THE LOUISIANA GULF COAST AND AN UPPER LEVEL TROUGH AXIS STRETCHING FROM LAKE SUPERIOR BACK THROUGH THE CENTRAL PLAINS. TEMPERATURES ACROSS THE MID SOUTH ARE IN THE LOWER 70S AT MOST LOCATIONS.
610 AM EDT WED SEP 9 2015 A WARM FRONT WILL LIFT NORTH OF THE REGION TODAY WHILE LOW PRESSURE TRACKS THROUGH QUEBEC.
435 AM EDT WED SEP 9 2015 HIGH PRESSURE THAT BROUGHT US THIS RECENT STRING OF DRY AND VERY WARM DAYS WILL DRIFT OFF THE EAST COAST. A COLD FRONT WILL MOVE SLOWLY EAST ACROSS THE REGION WEDNESDAY AFTERNOON AND NIGHT. A WAVE OF LOW PRESSURE WILL FORM ALONG THIS FRONT AND BRING A SHOWERY AND MUCH COOLER DAY FOR THURSDAY.