Aikyam-Lab/Synoptic-Bench huggingface dataset:
A DRY COLD FRONT WILL MOVE THROUGH THE AREA THIS EVENING. HIGH PRESSURE BUILDS INTO THE MID ATLANTIC TONIGHT AND EARLY SATURDAY. LOW PRESSURE WILL DEVELOP ALONG THE SOUTHEAST COAST SATURDAY AND THEN TRACK NORTHEAST OFF THE COAST.
357 AM CDT WED APR 29 2015 UA ANALYSIS FROM EARLIER THIS EVENING HAD RIDGING EXTENDING FROM SO CAL NEWD INTO THE CANADIAN PRAIRIE PROVINCES AND SOUTHERN PORTIONS OF THE NW TERRITORIES. EAST OF THE RIDGE. A TROUGH OF LOW PRESSURE EXTENDED FROM HUDSON BAY SWD TO THE NORTHERN GREAT LAKES. EAST OF THE TROUGH. A DECENT UPPER LEVEL LOW WAS NOTED SOUTH OF NOVA SCOTIA. HIGH PRESSURE WAS ANCHORED ACROSS THE CENTRAL AND NORTHERN PLAINS WITH MAINLY CLEAR SKIES NOTED. HIGH PRESSURE WILL TRANSITION EAST INTO THE MID MISSISSIPPI VALLEY TODAY AND TONIGHT. WENT WITH THE WARMER MAV TEMPS FOR TODAY AS THE LOWER TO MID 70S SEEM PLAUSIBLE GIVEN THE FCSTD H85 TEMPS IN THE NAM. OVERNIGHT LOWS WILL FALL OFF TO THE LOWER 40S ACROSS ALL OF WESTERN AND NORTH CENTRAL NEBRASKA.
622 AM EDT WED APR 29 2015 LOW PRESSURE EAST OF THE MARITIMES WILL SLOWLY PULL AWAY FROM THE REGION THROUGH TONIGHT. WEAK HIGH PRESSURE WILL BUILD INTO NORTHERN NEW ENGLAND THURSDAY.
332 AM EDT WED APR 29 2015 SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY IN ADVANCE OF A COLD FRONT THAT MOVES THROUGH TONIGHT. HIGH PRESSURE THEN BRINGS SLIGHTLY COOLER AND MUCH DRIER CONDITIONS THAT WILL CONTINUE INTO THE WEEKEND.
500 AM MDT WED APR 29 2015 QUIET WEATHER TODAY INTO THURSDAY AS AN UPPER RIDGE MOVES ACROSS THE REGION. WARMER TODAY WITH HIGHS REACHING INTO THE 70S ACROSS MUCH OF THE PLAINS UNDER SUNNY SKIES AND 700H TEMPS WARMING TO AROUND 5-8C. FRONT A LITTLE SLOWER THAN EARLIER PROGGED THUS MAX TEMPS THURSDAY A LITTLE WARMER AS A RESULT. UPSLOPE FLOW BEHIND THE FRONT SHOULD SET OFF AT LEAST SCTD SHOWERS AND A FEW TSTRMS INITIALLY OVER THE HIGHER TERRAIN OF SE WY DURING THE AFTERNOON WITH ACTIVITY MOVING EAST OVER THE PLAINS THROUGH THE EVENING HOURS.
253 AM PDT WED APR 29 2015 Today will be breezy and cooler with afternoon temperatures in the 60s over much of the Inland Northwest.
125 AM EDT WED APR 29 2015 HIGH PRESSURE OVER THE GREAT LAKES WILL KEEP DRY WEATHER ACROSS THE REGION THROUGH WEDNESDAY. A WEAK COLD FRONT WILL SLOWLY MOVE THROUGH THE UPPER GREAT LAKES REGION THROUGH WEDNESDAY WHILE WHILE A SLOW MOVING LOW PRESSURE SYSTEM WELL OFF THE EAST COAST CONTINUES TO CRAWL ITS WAY FURTHER INTO THE ATLANTIC. AS A RESULT THERE IS VERY WEAK HIGH PRESSURE OVERHEAD WITH LIGHT WINDS EXPECTED FOR THE REMAINDER OF THE NIGHT.
646 AM EDT WED APR 29 2015 HIGH PRESSURE AND DRY AIR WILL MOVE EAST TODAY. A POTENT UPPER LOW IS FORECAST TO DROP SOUTH ACROSS THE AREA TONIGHT THROUGH THURSDAY. DRY WEATHER AND WARMER TEMPERATURES WILL ACCOMPANY HIGH PRESSURE FOR THE WEEKEND. SURFACE ANALYSIS SHOWS A WEAK AND ILL-DEFINED AREA OF HIGH PRESSURE OVER THE OHIO VALLEY. SATELLITE IMAGERY INDICATES GRADUALLY INCREASING HIGH CLOUDS WELL AHEAD OF A CLOSED UPPER LOW THAT IS STARTING TO MOVE SOUTHWARD ACROSS THE GREAT LAKES TOWARD THE CENTRAL OHIO VALLEY. CLOUDS WILL INCREASE TONIGHT IN ADVANCE OF THE UPPER LOW. SHOWERS ARE EXPECTED TO CONTINUE TO FORM ON THURSDAY UNTIL THE UPPER LOW MAKES ITS WAY ACROSS THE FA TO EASTERN KENTUCKY THURSDAY NIGHT.
THE MOISTURE IS ON THE SE SIDE OF THE UPPER TROUGH AXIS WHICH EXTENDS NE FROM THE LOWS CENTER. INVERTED TROUGH STRETCHES FROM THE NRN GULF NNE ACROSS NWRN GA. SOME UPPER LEVEL RIDGING WILL GAIN A STRONGHOLD ON THE WEATHER SCENARIO. STILL NO ORGANIZED COLD FRONT TO SPEAK OF.
241 AM CDT WED APR 29 2015 UPPER LEVEL RIDGING AND NORTHERLY FLOW ALOFT WILL PREVAIL FOR THE NEXT FEW DAYS IN THE WAKE OF THE UPPER LEVEL LOW THAT MOVED ACROSS YESTERDAY.
253 AM CDT WED APR 29 2015 WV IMAGERY SHOWING A WELL AMPLIFIED PATTERN WITH A LARGE UPPER RIDGE SITTING OVER THE MAJORITY OF THE WRN/CNTRL CONUS. MODELS ARE IN GOOD AGREEMENT PAC NW TROF WILL QUICKLY SCOOT ALONG THE U. AND BY THURSDAY NIGHT DRAG A COLD FRONT INTO THE DAKOTAS WITH PCPN ACTIVITY DEVELOPING ALONG AXIS OF MOIST BNDRY LYR CONVERGENCE.
333 AM EDT WED APR 29 2015 CLUSTERS OF SHOWERS WITH EMBEDDED THUNDERSTORMS HAVE FLARED NORTH OF THE LOWER AND MIDDLE KEYS EARLY THIS MORNING. TEMPERATURES ARE IN THE LOWER 80S ALONG THE ISLAND CHAIN UNDER PARTLY CLOUDY SKIES. THE AREA OF LOW PRESSURE CURRENTLY IN THE NORTHEASTERN GULF.
An upper-level trough moving into the Pacific NW this morning with push a cold front across central Idaho by sunrise and across Western Montana this morning and afternoon. This system does not have much moisture to work with, and models are thus only showing a few isolated showers (mostly over the higher terrain, virga elsewhere).
/ISSUED 535 AM CDT WED APR 29 2015/ THIS MORNING WATER VAPOR LOOP INDICATED THE UPPER LOW THAT HAS BEEN CONTRIBUTING TO OUR RECENT RAINFALL HAS SHIFTED EAST INTO TENNESSEE WITH TRAILING TROUGH INTO THE CENTRAL GULF OF MEXICO. HIGH PRESSURE ON THE SURFACE AND ALOFT CONTINUED TO BUILD INTO THE FOUR STATE REGION. WITH THE MAIN UPPER LEVEL RIDGE EXTENDING FROM BAJA INTO THE NORTHERN ROCKIES AND THE UPPER MISSOURI RIVER VALLEY. UNDER HIGH PRESSURE THE FOUR STATE REGION WILL HAVE DRY WEATHER WITH COOL NIGHTS AND MILD DAYS WITH A SLOW WARMING TREND INTO THE LATE WEEK. A CLOSED UPPER LOW WILL MOVE SOUTH FROM EASTERN CANADA ACROSS THE GREAT LAKES AND INTO THE OHIO AND EASTERN TENNESSEE VALLEY LATE THURSDAY PROVIDING A BACK DOOR TO MOVE ACROSS THE AREA RETURNING A BRIEF COOLING OF TEMPERATURES.
CHANGES TO WEATHER PATTERN EARLY TODAY AS CLOUDS INCREASE FROM THE WEST AND SOUTHWEST AS A LOW PRESSURE SYSTEM ALONG THE FLORIDA GULF COAST MOVES EAST INTO THE ATLANTIC. A WEAK UPPER LEVEL LOW OR DEEPENING UPPER TROUGH ALSO LIES OVER THE WESTERN TN VALLEY.
243 AM CDT WED APR 29 2015 THE SAME TROFFY REGIME CONTINUES IN THE SHORT TERM. A 2NDARY LOW ROUNDS THE BASE OF THE MEAN LONG WAVE TROF AND TAKES A SIMILAR TRACK. A DEEPENING CLOSED LOW DROPS DUE SOUTH FROM THE GREAT LAKES TO THE MID OHIO VALLEY IN THE 36-48 HOUR RANGE.
WATER VAPOR IMAGERY EARLY THIS MORNING SHOWS A RATHER VIGOROUS MID/UPPER LEVEL DISTURBANCE QUICKLY DIGGING SOUTHWARD ALONG THE EASTERN PERIPHERY OF AN UPPER RIDGE ACROSS WESTERN NORTH AMERICA. ALTHOUGH SURFACE DEWPOINTS ARE ONLY EXPECTED TO BE IN THE LOWER 40S. MUCH COOLER TEMPERATURES. HIGH PRESSURE IS CENTERED FROM THE UPPER MIDWEST INTO THE CENTRAL PLAINS TONIGHT AND IS EXPECTED TO STAY WEST OF THE TERMINALS THROUGH THE FORECAST PERIOD WITH A MODEST NE GRADIENT IN PLACE LOCALLY. HOWEVER AN UPPER LEVEL DISTURBANCE DROPPING SOUTH ACROSS THE AREA WILL ADVECT COOLER AIR OVERHEAD RESULTING IN MODEST DIURNAL INSTABILITY DEVELOPING DURING THE AFTERNOON OVER PORTIONS OF NORTH CENTRAL ILLINOIS.
SATELLITE IMAGERY SHOW A WEAK UPPER TROUGH MOVING THROUGH CENTRAL CALIFORNIA. A RIDGE WILL THEN STRENGTHEN OVER THE DESERT SOUTHWEST ON THURSDAY. THE MEDIUM RANGE MODELS ARE IN FAIRLY GOOD AGREEMENT WITH A FLAT RIDGE OVER THE DESERT SOUTHWEST DURING THE WEEKEND WITH THE MAIN WESTERLY FLOW WELL TO THE NORTH OF OUR AREA. THIS WILL BRING SIGNIFICANT COOLER TEMPERATURES ALONG WITH BREEZY TO WINDY CONDITIONS.
224 AM CDT WED APR 29 2015 FAIRLY QUIET AND WARMER WEATHER HIGHLIGHT THIS PERIOD. INCREASING ATMOSPHERIC THICKNESS IN RESPONSE TO UPPER RIDGING APPROACHING FROM THE WEST WILL SUPPORT DAYTIME HIGHS IN THE 70S ONCE AGAIN TODAY. COULD SEE A FEW THUNDERSTORMS FIRE ALONG THE LEE TROUGH OVER THE WESTERN HIGH PLAINS THURSDAY LATE AFTERNOON.
349 AM EDT WED APR 29 2015 UPPER LOW PRESSURE OVER THE NORTHERN GULF WILL MOVE EASTWARD TODAY. EXPECT WIDESPREAD SHOWERS AND A FEW THUNDERSTORMS DURING THE DAY BUT COVERAGE SHOULD DIMINISH FROM THE SOUTHWEST THIS AFTERNOON AND EVENING AS THE LOW MOVES EAST.
123 AM EDT WED APR 29 2015 LOW PRESSURE IN THE GULF OF MEXICO WILL MOVE EAST OVERNIGHT THEN CROSS NORTHERN FLORIDA WEDNESDAY. THE LOW WILL MOVE UP THE ATLANTIC COAST LATE WEDNESDAY THROUGH THURSDAY.
552 AM EDT WED APR 29 2015 A WEAK RIDGE OF HIGH PRESSURE WILL MAINTAIN FAIR WEATHER ACROSS MOST OF CENTRAL PENNSYLVANIA TODAY. AN UPPER LOW DROPPING SOUTH THROUGH THE NORTHERN GREAT LAKES INTO THE OHIO VALLEY.
A COLD FRONT IS MOVING ACROSS THE REGION THIS EVENING WITH GUSTY WINDS BETWEEN 15 TO 25 MPH WITH GUSTS UP TO 35 MPH. CONVECTIVE SHOWERS WILL DEVELOP AHEAD OF AND IN ASSOCIATION WITH THE COLD FRONT. A COLD FRONT WITH ASSOCIATED RAIN SHOWERS WILL BE THRU KPSC BY 29/10Z AND THRU KPDT/KALW BY 29/12Z. SKIES SHOULD CLEAR GRADUALLY CLEAR WITH DECREASING WINDS AFT 30/03Z AS HIGH PRESSURE MOVES IN.
A 1021MB HIGH WAS LOCATED OVER WEST TEXAS AND BROAD RIDGE AXIS ENTENDED NORTH ALONG THE PLAINS. UPPER AIR ANALYSIS SHOWED THE TROUGH AXIS FROM CENTRAL TENNESSEE TO NORTHWEST LOUISIANA TO NORTH CENTRAL TEXAS.
FOCUS SQUARELY ON VIGOROUS CLOSED LOW APPROACHING EASTERN LAKE SUPERIOR AS IT DROPS SOUTH OVER LAKE MICHIGAN/LOWER MICHIGAN TODAY AND TONIGHT. COLD AIR COMING DOWN THE LAKE FASTER THAN OVER LAND ON NORTHEAST WINDS TO THE EAST OF THE INVERTED TROUGH WILL KEEP EASTERN CWA COOL WITH 925 MB TEMPS HOLDING UP IN THE WEST ALONG WITH SOME EARLY SUN HELPING TO GET HIGHS INTO THE MID TO UPPER 60S ALONG AND WEST OF A BERLIN.
305 AM CDT WED APR 29 2015 LATEST WATER VAPOR SATELLITE IMAGERY SHOWS UPPER LEVEL RIDGE OVER THE ROCKY MOUNTAINS AND UPPER LEVEL TROUGH OVER SOUTHERN ONTARIO. 00Z GFS/NAM ARE IN GOOD AGREEMENT IN TRACKING UPPER LEVEL TROUGH OVER SOUTHERN ONTARIO INTO THE GREAT LAKES REGION THIS AFTERNOON AND INTO TONIGHT. 00Z GFS/NAM BUFKIT SOUNDINGS CONTINUE TO SHOW STEEP LOW LEVEL LAPSE RATES AND WEAK LOW LEVEL MOISTURE CONVERGENCE WITH THE UPPER LEVEL TROUGH. EXPECT HIGH TEMPERATURES THURSDAY TO BE A COUPLE TO A FEW DEGREES COOLER THAN TODAY. MAINLY IN THE LOWER TO MIDDLE 60S.
535 AM CDT WED APR 29 2015 THIS MORNING WATER VAPOR LOOP INDICATED THE UPPER LOW THAT HAS BEEN CONTRIBUTING TO OUR RECENT RAINFALL HAS SHIFTED EAST INTO TENNESSEE WITH TRAILING TROUGH INTO THE CENTRAL GULF OF MEXICO. HIGH PRESSURE ON THE SURFACE AND ALOFT CONTINUED TO BUILD INTO THE FOUR STATE REGION. WITH THE MAIN UPPER LEVEL RIDGE EXTENDING FROM BAJA INTO THE NORTHERN ROCKIES AND THE UPPER MISSOURI RIVER VALLEY. UNDER HIGH PRESSURE THE FOUR STATE REGION WILL HAVE DRY WEATHER WITH COOL NIGHTS AND MILD DAYS WITH A SLOW WARMING TREND INTO THE LATE WEEK. A CLOSED UPPER LOW WILL MOVE SOUTH FROM EASTERN CANADA ACROSS THE GREAT LAKES AND INTO THE OHIO AND EASTERN TENNESSEE VALLEY LATE THURSDAY PROVIDING A BACK DOOR TO MOVE ACROSS THE AREA RETURNING A BRIEF COOLING OF TEMPERATURES.
128 AM CDT WED APR 29 2015 THE SAME TROFFY REGIME CONTINUES IN THE SHORT TERM. A 2NDARY LOW ROUNDS THE BASE OF THE MEAN LONG WAVE TROF AND TAKES A SIMILAR TRACK. A DEEPENING CLOSED LOW DROPS DUE SOUTH FROM THE GREAT LAKES TO THE MID OHIO VALLEY IN THE 36-48 HOUR RANGE.
RIDGE AXIS IS PROG TO BISECT THE CWA OVERNIGHT WITH LIGHT WIND AND MIN TEMPS SOME 10 TO 15 DEGREES BELOW NORMAL FOR THIS TIME OF YEAR.
416 AM CDT WED APR 29 2015 THE UPPER LOW IS MOVING ACROSS THE NORTHERN PORTIONS OF THE STATE THIS MORNING WITH A FEW SHOWERS CONTINUING MAINLY OVER THE NORTHEASTERN PORTIONS OF THE AREA. ANOTHER UPPER TROUGH WILL SWING ACROSS THE AREA THIS EVENING.
217 AM EDT WED APR 29 2015 HIGH PRESSURE WILL BRING MOSTLY SUNNY SKIES AND SEASONABLE TEMPERATURES TO NY AND PA TODAY.
A couple of troughs will near the forecast area through the short term period. The next trough will begin to drop down from the north tomorrow evening into the overnight hours. Lows Wednesday night will be a few degrees warmer in the upper 40s to around 50.
325 AM EDT WED APR 29 2015 LOW PRESSURE EAST OF THE MARITIMES WILL SLOWLY PULL AWAY FROM THE REGION THROUGH TONIGHT. WEAK HIGH PRESSURE WILL BUILD INTO NORTHERN NEW ENGLAND THURSDAY.
1150 PM MDT TUE APR 28 2015 A DRY NORTH FLOW SETTLED OVER THE REGION IN THE PAST 24 HOURS AS A POSITIVELY TILTED RIDGE SETTLED OVER THE ROCKIES. THIS FEATURE WILL DRIVE THE RIDGE AXIS EAST. A SHALLOW COLD FRONT DRAPING DOWN INTO THE NORTHERN GREAT BASIN WILL BRING AN INCREASE IN CLOUD COVER AND CONVECTIVE ACTIVITY IN THE LATE AFTERNOON AND EVENING.
EARLY MORNING LOWS WILL RANGE FROM THE LOWER 30S WEST TO UPPER 30S EAST OVER NORTHWEST OHIO. HIGHS TODAY WILL REACH INTO THE LOWER TO MID 60S. EXCEPT IN THE LOWER TO MID 50S CLOSER TO THE LAKE MICHIGAN SHORELINE. AN UPPER LOW WILL MOVE SOUTH ACROSS LOWER MICHIGAN TONIGHT. CLOUD COVER ASSOCIATED WITH THIS SYSTEM WILL KEEP LOWS A LITTLE WARMER THAN THE PAST COUPLE OF NIGHT. THOUGH WITH CENTROID OF ANTICYCLONE UPSTREAM /90W/ AND FCST SFC TEMPS 36-38F WILL ONLY MAKE MENTION OF POTNL IN HWO FOR NOW GIVEN UNCERTAINTY.
606 AM EDT WED APR 29 2015 A WEAK RIDGE OF HIGH PRESSURE WILL MAINTAIN FAIR WEATHER ACROSS MOST OF CENTRAL PENNSYLVANIA TODAY. AN UPPER LOW DROPPING SOUTH THROUGH THE NORTHERN GREAT LAKES INTO THE OHIO VALLEY.
EXPECT VFR CONDITIONS TO PREVAIL ACROSS THE RIO GRANDE VALLEY THE REST OF TONIGHT INTO WEDNESDAY AS A 500MB RIDGE ACROSS THE WEST CENTRAL UNITED STATES AND WESTERLY FLOW ALOFT CONTINUE TO PROVIDE SUBSIDENCE ACROSS THE AREA. THE 500 MB CLOSED LOW LOCATED OVER THE TX PANHANDLE REGION WILL OPEN UP AND PUSH EAST TONIGHT INTO WED. THE MAV AND MET SHORT TERM TEMPS ARE IN DECENT AGREEMENT BUT LEANED TOWARDS THE SLIGHTLY WARMER MAV NUMBERS DUE TO THE POTENTIAL FOR STRONGER DIURNAL EFFECTS.
124 AM EDT WED APR 29 2015 LOW PRESSURE IN THE GULF OF MEXICO WILL MOVE EAST OVERNIGHT THEN CROSS NORTHERN FLORIDA WEDNESDAY. THE LOW WILL MOVE UP THE ATLANTIC COAST LATE WEDNESDAY THROUGH THURSDAY.
215 AM MDT WED APR 29 2015 QUIET WEATHER TODAY INTO THURSDAY AS AN UPPER RIDGE MOVES ACROSS THE REGION. WARMER TODAY WITH HIGHS REACHING INTO THE 70S ACROSS MUCH OF THE PLAINS UNDER SUNNY SKIES AND 700H TEMPS WARMING TO AROUND 5-8C. FRONT A LITTLE SLOWER THAN EARLIER PROGGED THUS MAX TEMPS THURSDAY A LITTLE WARMER AS A RESULT. UPSLOPE FLOW BEHIND THE FRONT SHOULD SET OFF AT LEAST SCTD SHOWERS AND A FEW TSTRMS INITIALLY OVER THE HIGHER TERRAIN OF SE WY DURING THE AFTERNOON WITH ACTIVITY MOVING EAST OVER THE PLAINS THROUGH THE EVENING HOURS.
WRF AND RAP RUNS CONTINUE TO INDICATE OF FOG FORMING IN THE VICINITY OF A WEAKLY ORGANIZED DENVER CYCLONE JUST NORTHEAST OF DENVER'S INTERNATIONAL AIRPORT WITHIN THE NEXT HOUR OR TWO. WHEREAS THE NAM INDICATES THE HIGHEST RH VALUES CLOSER TO THE DENVER METRO AREA. SHARP UPPER LEVEL RIDGE AXIS WILL SHIFT EAST ACROSS COLORADO. THIS WILL BRING WARMER TEMPERATURES AND SUNNY SKIES TO THE FORECAST AREA. THURSDAY WILL FEATURE THE UPPER RIDGE AXIS CENTERED OVER COLORADO AS A COLD FRONT AND UPPER LEVEL DISTURBANCE APPROACH THE STATE FROM THE NORTH AND NORTHWEST. THE SURFACE COLD FRONT IS NOT EXPECTED UNTIL SOMETIME THURSDAY EVENING.
409 AM CDT WED APR 29 2015 A BEAUTIFUL DAY IS ON TAP FOR NORTH DAKOTA AS UPPER LEVEL RIDGING MOVES INTO THE AREA. WITH WARMER TEMPERATURES AND WINDS GUSTING TO NEAR 30 MPH. MODELS ARE HINTING AT MOISTURE POOLING AHEAD OF AN APPROACHING COLD FRONT. WHERE THE HIGHEST WINDS ARE EXPECTED. SO TO THE HIGHEST DEW POINTS. A COLD FRONT WILL BE KNOCKING ON OUR DOOR. THIS TROUGH WILL BRING A WEAK COLD FRONTAL PASSAGE AND A CHANCE FOR SHOWERS TO THE REGION.
211 AM EDT WED APR 29 2015 HIGH PRESSURE WILL CONTINUE TO KEEP DRY WEATHER OVER THE OHIO VALLEY FOR YET ANOTHER DAY. A STRONG UPPER LEVEL LOW WILL DIVE SOUTH FROM THE WESTERN GREAT LAKES.
THROUGH NORTH FL AND INTO THE ATLANTIC WILL HELP KEEP DEEPER MOISTURE SOUTH/EAST AHEAD OF FAIRLY DEEP UPPER TROUGH.
322 AM EDT WED APR 29 2015 A WEAK RIDGE OF HIGH PRESSURE WILL MAINTAIN FAIR WEATHER ACROSS MOST OF CENTRAL PENNSYLVANIA TODAY. AN UPPER LOW DROPPING SOUTH THROUGH THE NORTHERN GREAT LAKES INTO THE OHIO VALLEY.
127 AM EDT WED APR 29 2015 HIGH PRESSURE OVER THE AREA TONIGHT WILL WEAKEN AS AN UPPER LEVEL LOW PRESSURE SYSTEM DROPS SOUTH ACROSS THE AREA WEDNESDAY NIGHT AND THURSDAY.
MID LEVEL CLOUDS CONTINUE TO DRIFT SEWRD AS AN UPPER LOW CONTINUES TO TRACK OUT OF THE REGION. /ISSUED 919 PM CDT TUE APR 28 2015/ UPPER LEVEL TROUGH CONTINUES TO SPIN ACROSS EASTERN ARKANSAS LATE THIS EVENING WITH SOME LIGHT RAIN ECHOES SHOWING UP ACROSS OUR NORTHERN ZONES. SOME BREAKS IN THE OVC WERE NOTED ACROSS NORTH CENTRAL TEXAS AND AS THE UPPER LEVEL TROUGH CONTINUES TO EJECT OUT TO OUR EAST.
AN UPPER LEVEL TROUGH THAT WAS ALONG THE COAST EARLY WED MORNING WILL MOVE INLAND TODAY. WATER VAPOR PICTURES EARLY THIS MORNING SHOWED THE MAIN UPPER TROUGH STILL OFF THE COAST. WHILE ELSEWHERE MOST OF THE LOW CLOUDS HAD CLEARED OUT. THE THREAT OF SHOWERS WILL DROP OFF THIS EVENING AS THE MAIN TROUGH MOVES OFF TO THE E.
HIGHS TODAY WILL REACH INTO THE LOWER TO MID 60S. EXCEPT IN THE LOWER TO MID 50S CLOSER TO THE LAKE MICHIGAN SHORELINE. WEAK LL THERMAL RIDGING AHD OF THIS FTR ALG W/AT LEAST PARTIAL MORNING INSOLATION AND SOMEWHAT WARMER START FOR MOST AND SHLD YIELD TEMPS SIMILAR TO THIS AFTN. THIS ALLOWS WARMER AND (RELATIVELY) MORE HUMID AIRMASS TO INFILTRATE OUR AREA. WINDS HAVE BECOME CALM OVERNIGHT AS WEAK HIGH PRESSURE PERSISTS OVER THE REGION.
346 AM CDT WED APR 29 2015 UPPER RIDGING WILL CONTINUE TO NOSE EASTWARD ACROSS THE DAKOTAS TODAY.
A COLD FRONT IN SOUTHEAST OREGON WILL MOVE THROUGH SOUTHWEST IDAHO THIS MORNING AND SHIFT TO OUR SOUTHEAST BY NOON. UPPER LEVEL SUPPORT ACCOMPANYING A TROUGH TO OUR WEST WILL ENHANCE THE POTENTIAL FOR ISOLATED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. SHOWERS WILL DIMINISH LATE TONIGHT AND END BY THURSDAY AS A DRIER W-NW FLOW FOLLOWS THE DEPARTING TROUGH. TEMPERATURES WILL BE ABOUT 5-10 DEGREES COOLER TODAY.
AS OF 08 UTC, A LINE OF HEAVY SHOWERS AND EMBEDDED THUNDERSTORMS HAD DEVELOPED ALONG AND AHEAD OF THE EFFECTIVE SURFACE COLD FRONT - ROUGHLY FROM MARIANN TO PANAMA CITY AND EXTENDING ABOUT 20 NM OFFSHORE OVER THE GULF OF MEXICO. HIGHS SHOULD BE MAINLY IN THE 70S, WITH COOLER TEMPERATURES IN OUR NORTHERN GEORGIA COUNTIES AND THE WARMEST TEMPERATURES IN THE EASTERN BIG BEND.
129 AM EDT WED APR 29 2015 HIGH PRESSURE OVER THE REGION WILL KEEP DRY AND SEASONABLE WEATHER INTO WEDNESDAY.
AS A LOW PRESSURE MOVES IN TONIGHT. THE LOW WILL BEGIN TO PULL AWAY FROM THE AREA LATE IN THE AFTERNOON AND EVENING WITH IMPROVING CONDITIONS EXPECTED FROM SOUTH TO NORTH.
255 AM CDT WED APR 29 2015 AN UPPER LEVEL LOW WILL DROP SOUTH INTO FAR EASTERN LAKE SUPERIOR TODAY THEN CONTINUE SOUTH TONIGHT. A RIDGE OF HIGH PRESSURE AT THE SURFACE WILL HELP AND KEEP MOST OF THE NORTHLAND DRY AND MILD TODAY. A STRONGER LAKE BREEZE IS EXPECTED KEEPING AREAS NEAR THE LAKE COOLER.
351 AM EDT WED APR 29 2015 HIGH PRESSURE WILL WEAKEN TODAY. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL DROP SOUTH ACROSS THE CENTRAL GREAT LAKES LATER TODAY TO THE TENNESSEE VALLEY ON THURSDAY.
LOW PRESSURE AND AN ASSOCIATED COLD FRONT IS MOVING AWAY FROM THE REGION THIS MORNING AND INTO THE FLORIDA PENINSULA. BEHIND THIS SYSTEM A COOLER AIR MASS HAS MOVED IN. ALTHOUGH HIGH PRESSURE IS BUILDING IN AT THE SURFACE AN UPPER LOW AND POST FRONTAL STRATUS HAS KEPT THE AREA SHROUDED IN CLOUD COVER FOR MOST OF THE PAST EVENING AND INTO EARLY THIS MORNING. TODAY WITH A COOLER AIR MASS IN PLACE TEMPS WILL AGAIN RUN SEVERAL DEGREES BELOW NORMAL, HOWEVER SKIES WILL BE MOSTLY SUNNY.
642 AM EDT WED APR 29 2015 LOW PRESSURE IN NORTHERN FLORIDA TODAY WILL BE OFF THE GEORGIA AND SOUTH CAROLINA COAST TONIGHT.
302 AM CDT Wed Apr 29 2015 Light winds, clear skies and cool surface ridging has led to temperatures rapidly cooling into the 30s and 40s overnight tonight. Could even see some near or below freezing temps near the Davis Mtns and Marfa Plateau by sunrise. Still expecting a warming trend through the end of the week as upper ridging slowly moves east over the area by the weekend. Meanwhile at the surface, lee troughing will strengthen, promoting the return of southerly flow to the region.
220 AM EDT WED APR 29 2015 LOW PRESSURE IN NORTHERN FLORIDA TODAY WILL BE OFF THE GEORGIA AND SOUTH CAROLINA COAST TONIGHT.
530 AM CDT WED APR 29 2015 LATEST WATER VAPOR SATELLITE IMAGERY SHOWS UPPER LEVEL RIDGE OVER THE ROCKY MOUNTAINS AND UPPER LEVEL TROUGH OVER SOUTHERN ONTARIO. 00Z GFS/NAM ARE IN GOOD AGREEMENT IN TRACKING UPPER LEVEL TROUGH OVER SOUTHERN ONTARIO INTO THE GREAT LAKES REGION THIS AFTERNOON AND INTO TONIGHT. 00Z GFS/NAM BUFKIT SOUNDINGS CONTINUE TO SHOW STEEP LOW LEVEL LAPSE RATES AND WEAK LOW LEVEL MOISTURE CONVERGENCE WITH THE UPPER LEVEL TROUGH. EXPECT HIGH TEMPERATURES THURSDAY TO BE A COUPLE TO A FEW DEGREES COOLER THAN TODAY. MAINLY IN THE LOWER TO MIDDLE 60S.
345 AM CDT WED APR 29 2015 NEARLY PERFECT SPRING DAY ACROSS THE REGION TODAY AS DRY HIGH PRESSURE BUILDS INTO THE REGION LEADING TO CLEAR SKIES AND LIGHT WINDS THROUGHOUT THE DAY. MODELS ARE STILL SHOWING SOME RAINFALL ASSOCIATED WITH A WEAK COLD FRONT.
336 AM CDT WED APR 29 2015 A PLEASANT AND DRY WEATHER PATTERN WILL PERSIST ACROSS SOUTHEAST TEXAS TODAY AND THURSDAY AS HIGH PRESSURE DRIFTS ACROSS THE STATE.
304 AM EDT WED APR 29 2015 HIGH PRESSURE WILL BRING MOSTLY SUNNY SKIES AND SEASONABLE TEMPERATURES TO NY AND PA TODAY.
348 AM EDT WED APR 29 2015 HIGH PRESSURE AND DRY AIR WILL MOVE EAST TODAY. A POTENT UPPER LOW IS FORECAST TO DROP SOUTH ACROSS THE AREA TONIGHT THROUGH THURSDAY. DRY WEATHER AND WARMER TEMPERATURES WILL ACCOMPANY HIGH PRESSURE FOR THE WEEKEND. SURFACE ANALYSIS SHOWS A WEAK AND ILL-DEFINED AREA OF HIGH PRESSURE OVER THE OHIO VALLEY. SATELLITE IMAGERY INDICATES GRADUALLY INCREASING HIGH CLOUDS WELL AHEAD OF A CLOSED UPPER LOW THAT IS STARTING TO MOVE SOUTHWARD ACROSS THE GREAT LAKES TOWARD THE CENTRAL OHIO VALLEY. CLOUDS WILL INCREASE TONIGHT IN ADVANCE OF THE UPPER LOW. SHOWERS ARE EXPECTED TO CONTINUE TO FORM ON THURSDAY UNTIL THE UPPER LOW MAKES ITS WAY ACROSS THE FA TO EASTERN KENTUCKY THURSDAY NIGHT.
344 AM CDT WED APR 29 2015 THE UPPER LOW THAT BROUGHT RAIN SHOWERS TO EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THE PAST COUPLE OF DAYS HAS NOW PUSHED OFF TO THE EAST. MOSTLY CLEAR SKIES WERE COMMON ACROSS THE REGION EARLY THIS MORNING AS HIGH PRESSURE SET UP OVER THE SOUTHERN PLAINS. QUIET WEATHER CONDITIONS ARE EXPECTED TO CONTINUE THROUGH THE WEEK AS HIGH PRESSURE SLIDES THROUGH THE PLAINS.
1021 PM PDT TUE APR 28 2015 An approaching cold front will lead to an increase in winds and much cooler temperatures through Wednesday, along with a chance for showers and a possible thunderstorm mainly tonight. /Kelch 06Z TAFS: A cold front will pass through KMWH this evening and east across the remainder of the area tonight.
AN UPPER RIDGE CONTINUES TO DOMINATE THE PATTERN FOR THE OVERNIGHT HOURS. AN UPPER TROUGH WILL PUSH A FRONT THROUGH NORTHEASTERN MONTANA LATE ON WEDNESDAY. PROTON UPPER LEVEL RIDGE EXISTS FROM SOUTHERN CALIFORNIA INTO WESTERN MONTANA BRINGING IN WARMER AND DRIER AIR TO OUR REGION. SURFACE TROF AHEAD OF THAT TROF IS DEEPENING FROM THE CANADIAN ROCKIES SOUTH INTO MONTANA. MODELS ARE IN FAIRLY GOOD AGREEMENT WITH THE TIME OF THE TROF THROUGH OUR CWA DURING THE DAY ON WEDNESDAY.
654 AM EDT WED APR 29 2015 THE EVER-PRESENT UPPER LEVEL LOW WILL FINALLY BEGIN TO SHIFT SLOWLY EASTWARD. HIGH PRESSURE BUILDS IN OVER THE WEEKEND.
209 AM EDT WED APR 29 2015 A WEAK RIDGE OF HIGH PRESSURE WILL MAINTAIN FAIR WEATHER ACROSS MOST OF CENTRAL PENNSYLVANIA TODAY. AN UPPER LOW DROPPING SOUTH THROUGH THE NORTHERN GREAT LAKES INTO THE OHIO VALLEY.
316 AM EDT WED APR 29 2015 THE EVER-PRESENT UPPER LEVEL LOW WILL FINALLY BEGIN TO SHIFT SLOWLY EASTWARD. HIGH PRESSURE BUILDS IN OVER THE WEEKEND.
622 AM EDT WED APR 29 2015 LOW PRESSURE IN NORTHERN FLORIDA TODAY WILL BE OFF THE GEORGIA AND SOUTH CAROLINA COAST TONIGHT.
1032 PM EST WED JAN 6 2016 CURRENTLY - A STRONG HIGH PRESSURE SYSTEM IS IN PLACE ACROSS THE EASTERN UNITED STATES. A LOW PRESSURE SYSTEM DEEPENING NORTHEAST OF THE BAHAMAS HAS PUSHED NORTHWARD THE FIELD OF STRONGER WINDS ASSOCIATED WITH THE CONTINENTAL HIGH. A SMALL SCALE LOW PRESSURE SYSTEM NEAR CUBA THAT EARLIER CONTRIBUTED TO STRONG WINDS OVER THE FLORIDA STRAITS HAS DISSIPATED.
AN UPPER LEVEL LOW OFFSHORE WILL MOVE INLAND TOWARD OREGON ON THURSDAY.
917 PM EST WED JAN 6 2016 HIGH PRESSURE WILL REMAIN TO OUR SOUTH THROUGH THURSDAY.
MODELS CONTINUE TO ADVERTISE MID/UPPER LEVEL TROUGH OVER FORECAST AREA AND CALIFORNIA. COLDER AIR GETS USHERED IN ALOFT WITH AFOREMENTIONED TROUGH. WIND WILL MIX DOWN ON BACKSIDE OF TROUGH. ALTHOUGH LIGHT SNOW TO REMAIN OVER THE HIGHER MOUNTAINS.
558 PM CST WED JAN 6 2016 S/W TROF AXIS OVER IOWA LATE THIS AFTERNOON IS ACCOMPANIED BY A FAIRLY LARGE PRECIP SHIELD. AREAS OF FREEZING DRIZZLE/FLURRIES/FOG WILL PERSIST THROUGH TOMORROW.