Aikyam-Lab/Synoptic-Bench huggingface dataset:
A DEEP LAYER LOW NORTH OF BERMUDA WILL STRENGTHEN TONIGHT AND EARLY SUNDAY WITH AN AREA OF HIGH PRESSURE BUILDING ACROSS THE EASTERN UNITED STATES. THE HIGH PRESSURE WILL BRING DRIER AIR OFF THE MAINLAND AND REDUCE RAIN CHANCES ON SUNDAY.
125 AM EDT SAT APR 16 2016 DRY HIGH PRESSURE WILL BUILD SOUTHWARD OVER THE REGION THROUGH THE WEEKEND. A WEAK COLD FRONT WILL ARRIVE FROM THE NORTH BY MID WEEK. WITH COOLER TEMPERATURES AND GRADUALLY INCREASING MOISTURE MID TO LATE WEEK. THIS MAY PERMIT SLIGHTLY IMPROVED RADIATING CONDITIONS AND SOME PATCHY FROST DEVELOPMENT IN THE COOLER MOUNTAINS SPOTS AND IN SHELTERED MOUNTAIN VALLEY LOCATIONS. QUIET WEATHER WILL CONTINUE ACROSS THE WESTERN CAROLINAS AND NORTHEAST GEORGIA AS A SPRAWLING MID/UPPER LEVEL BLOCKING PATTERN REMAINS IN PLACE THROUGH THE NEAR TERM. ADDITIONAL DRY AIR WILL BE DRIVEN SOUTHWARD EAST OF THE BLUE RIDGE TONIGHT THROUGH SATURDAY. ADJACENT BLUE RIDGE.
A WEAK UPPER TROUGH AXIS IS LOCATED ALONG THE SOUTHERN PERIPHERY OF THE DIVISION. UPPER RIDGING WILL AMPLIFY A BIT.
429 AM EDT SAT APR 16 2016 HIGH PRESSURE ACROSS THE REGION AT THE SURFACE AND ALOFT WILL RESULT IN CLEAR SKIES AND ABOVE NORMAL TEMPERATURES.
AFTER FRIDAYS ISOLATED SEVERE THUNDERSTORMS /HAIL PRODUCERS/ MID- AND UPPER-LEVELS OF ATMOSPHERE HAVE WARMED SLIGHTLY AS TROUGH HAS FLATTENED.
A STRONG LOW PRESSURE SYSTEM NEAR THE FOUR CORNERS WILL BRING COOLER TEMPERATURES.
358 AM CDT SAT APR 16 2016 High amplitude H50 omega blocking pattern will continue to hold through the period, with mid/upper lvl high pressure sprawling from the Great lakes down through through the Ohio and Tennessee Valleys.
631 AM EDT SAT APR 16 2016 HIGH PRESSURE ACROSS THE REGION AT THE SURFACE AND ALOFT WILL RESULT IN CLEAR SKIES AND ABOVE NORMAL TEMPERATURES.
244 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL CONTINUE THROUGH THE WEEKEND PROVIDING DRY AND QUIET WITH. HIGH TEMPERATURES WILL BE A FEW DEGREES WARMER EACH DAY.
646 AM EDT SAT APR 16 2016 HIGH PRESSURE ACROSS THE REGION AT THE SURFACE AND ALOFT WILL RESULT IN CLEAR SKIES AND ABOVE NORMAL TEMPERATURES.
404 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN CENTERED JUST TO THE NORTH THROUGH THE WEEKEND.
1027 PM PDT FRI APR 15 2016 Strong high pressure will build over the Pacific Northwest this weekend.
332 AM CDT SAT APR 16 2016 AN ELONGATED AREA OF LOW PRESSURE AND FRONTAL BOUNDARY STRETCHED FROM THE TEXAS/NEW MEXICO AREA NORTHEAST THROUGH NORTHWEST MINNESOTA AND INTO ONTARIO. AREAS NEAR LAKE SUPERIOR WILL BE COOLER. BUT SLOWLY AS THE BLOCKING PATTERN REMAINS.
THE UPPER LOW SLOWLY PIVOTS FROM NORTHERN NEW MEXICO TO SOUTH CENTRAL COLORADO WITH DECENT UPWARD VERTICAL MOTION AND DEEP LOW AND MID LEVEL MOISTURE AFFECTING OUR COUNTIES. UPPER LOW MOVES EVER SO SLOWLY NORTH ACROSS CENTRAL COLORADO WITH A VORT LOBE OF ENERGY. UPPER LOW SLOWLY PIVOTS TO THE NORTH ACROSS COLORADO WITH A BIT OF DRY SLOTTING WORKING INTO SOUTHEAST WYOMING WHICH MAY DECREASE COVERAGE AND THE INTENSITY OF RAIN AND SNOW.
402 AM CDT SAT APR 16 2016 DEEPENING UPPER LOW WILL BRING A WINTRY MIX OR RAIN. SNOW AND FREEZING RAIN TO THE REGION TODAY. KEPT THE WINTER WEATHER ADVISORY IN PLACE AND AND ADDED A FREEZING RAIN ADVISORY NORTH CENTRAL FOR THIS MORNING AND EARLY AFTERNOON.
425 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH THE WEEKEND PROVIDING FAIR WEATHER AND MODERATING TEMPERATURES. LOWS WILL BE A FEW TICKS WARMER THAN TONIGHT. BRIGHT SUN AND A LIGHT BREEZE WITH TEMPERATURES A TAD WARMER THAN SATURDAY. AND SO IT SHALL BE WITH OUR CURRENT UPPER BLOCKING HIGH.
THIS WILL ALLOW HIGHS TO ONCE AGAIN REACH THE LOW TO PERHAPS MID 70S IN MOST SPOTS BY THE AFTERNOON. HIGH PRESSURE REMAINS OVER THE AREA THROUGH MID WORK WEEK WITH DRY WEATHER.
542 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH THE WEEKEND PROVIDING FAIR WEATHER AND MODERATING TEMPERATURES. LOWS WILL BE A FEW TICKS WARMER THAN TONIGHT. BRIGHT SUN AND A LIGHT BREEZE WITH TEMPERATURES A TAD WARMER THAN SATURDAY. AND SO IT SHALL BE WITH OUR CURRENT UPPER BLOCKING HIGH.
322 AM CDT SAT APR 16 2016 00Z UPPER-AIR ANALYSIS REVEALED A TROUGH OVER THE INTERIOR WEST WITH AN ASSOCIATED UPPER-LEVEL JET STREAK FROM THE GREAT BASIN INTO LOWER CO VALLEY. THIS JET STREAK WILL CONTINUE SEWD THROUGH THE BASAL PORTION OF THE PARENT TROUGH. AS THIS JET STREAK PIVOTS AROUND THE ERN PERIPHERY OF THE CLOSED LOW. ANOTHER JET STREAK/VORTICITY LOBE WILL PIVOT AROUND THE ERN PERIPHERY OF THE CNTRL ROCKIES UPPER LOW.
345 AM EDT SAT APR 16 2016 NO BIG CHANGES TO THE LARGE SCALE SCENARIO OF HIGH PRESSURE DOMINATING THE WEEKEND WEATHER ACROSS THE GREAT LAKES. FACTORING THIS IN FOR TODAY SUPPORTS MAX TEMPS REACHING THE LOWER 70S OVER A GREATER PORTION OF SE MICHIGAN. MIN TEMPS IN THE 40S TONIGHT ALL LOCATIONS ARE STILL 5 TO 10 DEGREES WARMER THAN NORMAL WHICH WILL PROPEL CONDITIONS INTO A REPEAT PERFORMANCE SUNDAY TO WRAP UP A CHAMBER OF COMMERCE WEEKEND FOR SE MICHIGAN.
444 AM CDT SAT APR 16 2016 CLOSED UPPER LOW OVER THE SOUTHERN ROCKIES EARLY THIS MORNING WILL MEANDER NORTH AND WEST TODAY THROUGH SUNDAY AROUND THE FOUR CORNERS REGION. A COLD FRONT.
412 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL KEEP SUNNY SKIES AND WARM SPRING TEMPERATURES OVER NEW YORK AND PENNSYLVANIA THROUGH THE WEEKEND.
122 AM EDT SAT APR 16 2016 A STRONG HIGH PRESSURE WEDGE WILL PREVAIL ACROSS THE AREA INTO THE WEEKEND. WHILE AN UPPER LEVEL TROUGH SLOWLY MOVES THROUGH THE REGION.
RIDGING WILL BUILD IN SATURDAY AND SUNDAY AS A CLOSED LOW CURRENTLY OVER THE FOUR CORNERS REGION MEANDERS AROUND THE CENTRAL ROCKIES. HIGH PRESSURE WILL REMAIN ELONGATED FROM MONTANA INTO SOUTHERN CANADA.
600 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN OVER NORTHERN NEW ENGLAND THROUGH SUNDAY.
407 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL CONTINUE THROUGH THE WEEKEND PROVIDING DRY AND QUIET WITH. HIGH TEMPERATURES WILL BE A FEW DEGREES WARMER EACH DAY.
502 AM EDT SAT APR 16 2016 VERY QUIET CONDITIONS CONTINUE ACROSS UPPER MICHIGAN AS BLOCKING HIGH PRESSURE REMAINS ENTRENCHED ACROSS THE GREAT LAKES REGION. SO MIN TEMPS WILL BE WARMER THERE. WARMER TEMPS WILL BE OFFSET BY HIGHER DEW POINTS AND LOWER WINDS COMPARED TO TODAY. THE BLOCKING PATTERN WITH A RIDGE DOMINATING THE GREAT LAKES WILL GIVE WAY TO NW NRN STREAM FLOW AND A FRONT INTO THE REGION AS A REX BLOCK DEVELOPS TO THE WEST SUN INTO MON.
ALONG WITH INCREASING UPPER LVL DIVERGENCE INVOK UPPER LOW.
622 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN IN CONTROL OF THE WEATHER PATTERN OVER THE NEXT SEVERAL DAYS.
UPPER RIDGE IS PROGGED TO STRENGTHEN ACROSS THE GREAT LAKES AND MIDWEST THROUGH SUNDAY. AND GENERALLY HAVE FAVORED WARMER GUIDANCE WITH MID/FEW UPPER 70S FOR AFTERNOON HIGHS AWAY FROM THE LAKE.
125 AM EDT SAT APR 16 2016 HIGH PRESSURE ACROSS THE REGION AT THE SURFACE AND ALOFT WILL RESULT IN CLEAR SKIES AND MODERATING TEMPERATURES THROUGH THE WEEKEND. HAVE RIDGING AT THE SURFACE AND ALOFT ACROSS THE REGION. HIGH PRESSURE.
542 AM EDT SAT APR 16 2016 LARGE AREA OF HIGH PRESSURE CENTERED OVER NORTHERN NEW ENGLAND WILL CONTINUE TO BRING VFR CONDITIONS TO THE AREA TODAY. ISSUED 345 AM EDT SAT APR 16 2016 NO BIG CHANGES TO THE LARGE SCALE SCENARIO OF HIGH PRESSURE DOMINATING THE WEEKEND WEATHER ACROSS THE GREAT LAKES. FACTORING THIS IN FOR TODAY SUPPORTS MAX TEMPS REACHING THE LOWER 70S OVER A GREATER PORTION OF SE MICHIGAN. MIN TEMPS IN THE 40S TONIGHT ALL LOCATIONS ARE STILL 5 TO 10 DEGREES WARMER THAN NORMAL WHICH WILL PROPEL CONDITIONS INTO A REPEAT PERFORMANCE SUNDAY TO WRAP UP A CHAMBER OF COMMERCE WEEKEND FOR SE MICHIGAN.
605 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL RIDGE INTO THE FORECAST AREA FROM THE NORTH THROUGH THE WEEKEND.
146 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL REMAIN OVER THE REGION THROUGH THE WEEKEND PROVIDING FAIR WEATHER AND MODERATING TEMPERATURES. CAN/T RULE OUT SOME PATCHY FROST OVER THE LOWER SUSQ.
THE UPPER LEVEL TROF CONTINUES TO MOVE EAST AND DRIER AIR IS MOVING IN FROM THE WEST. DEEP LARGE SCALE UPPER LEVEL TROUGH EXTENDS SOUTH THROUGH THE INTERMOUNTAIN WEST WITH MAIN ENERGY DIVING SOUTH INTO THE 4-CORNERS REGION THIS AFTERNOON WHILE NORTHERN LOBE OF ENERGY SPINS OVER EASTERN MT. MOISTURE WRAPPING AROUND THE NORTHERN CIRCULATION CONTINUES TO PRODUCE WIDESPREAD PRECIP OVER MUCH OF NORTH-CENTRAL MT BUT INTENSITY HAS BEEN DECREASING AS THIS UPPER LEVEL LOW FILLS. DRY WEATHER PREVAILS SATURDAY AND SUNDAY AS WEAK HIGH PRESSURE ALOFT MOVES INLAND ACROSS THE PACIFIC NW AND NORTHERN ROCKIES.
337 AM CDT SAT APR 16 2016 A prominent omega block will take hold today from the CONUS into the western Atlantic with the MS Valley and OH/TN Valley dominated by the upper ridge portion of the block. This pattern will maintain a low level anticyclone across the eastern U. Weather will be seasonably warm and tranquil with high temperatures today comparible to yesterday, and highs on Sunday a tad warmer than today.
THE DEVELOPING AREA OF LOW PRESSURE WILL MOVE EAST TOWARDS THE FOUR CORNERS REGION THIS EVENING. THE BLOCKING RIDGE REMAINS ANCHORED OVER THE EASTERN THIRD OF THE UNITED STATES. BUT THE AREA OF LOW PRESSURE HAS MOVED FURTHER EAST SO THAT ITS IMPACTS ARE FELT MORE EAST OF THE FORECAST AREA.
High pressure has begun building over the Northern Rockies, with today marking the first day in a long stretch of pleasant weather. By the end of the week, a broad low pressure system will move into the Pacific Northwest, allowing for a moist southwesterly flow to develop over the region.
THERE IS AN UPPER LEVEL LOW IN THE FOUR CORNERS REGION. THIS LOW IS SENDING OUT ENERGY INTO THE PLAINS. BUT WITH THE STRONG RIDGE TO THE EAST THE ENERGY IS MOVING NORTH ALONG THE HIGH PLAINS. WITH CLOUDS AND RAIN AROUND EXPECT THE TEMPERATURES TO BE A LITTLE COOLER. AN UPPER LOW PRESSURE SYSTEM CURRENTLY IN THE SOUTHERN ROCKIES WILL REMAIN TO OUR WEST FOR SEVERAL DAYS IN A BLOCKED PATTERN WITH RIDGING THROUGH THE OHIO VALLEY.
119 AM EDT SAT APR 16 2016 A STRONG HIGH PRESSURE WEDGE WILL PREVAIL ACROSS THE AREA INTO THE WEEKEND. WHILE AN UPPER LEVEL TROUGH SLOWLY MOVES THROUGH THE REGION.
413 AM EDT SAT APR 16 2016 HIGH PRESSURE ACROSS THE REGION AT THE SURFACE AND ALOFT WILL RESULT IN CLEAR SKIES AND ABOVE NORMAL TEMPERATURES.
346 AM CDT SAT APR 16 2016 A DEEP UPPER LEVEL TROUGH OF LOW PRESSURE CURRENTLY OVER THE FOUR CORNERS REGION WILL CONTINUE SPREADING SHOWERS.
628 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL KEEP SUNNY SKIES AND WARM SPRING TEMPERATURES OVER NEW YORK AND PENNSYLVANIA THROUGH THE WEEKEND.
422 AM EDT SAT APR 16 2016 UPPER-LEVEL PATTERN REMAINS ESSENTIALLY LOCKED IN PLACE OVER THE REGION THROUGH THE PERIOD AS A LARGE BLOCKING PATTERN HAS EVOLVED. FORTUNATELY FOR US WE GET PARKED UNDER THE UPPER RIDGE WHICH SHOULD SEE US CLEARING OUT THROUGH THE DAY TODAY INTO THE OVERNIGHT PERIOD AS THE WEAK UPPER LOW THAT WAS TRAPPED UNDER THE RIDGE CONTINUES TO WEAKEN AND LOSE ITS IDENTITY. MOSTLY CLEAR AND DRY SUNDAY UNDER THE UPPER RIDGE WITH MODERATING EASTERLY LOW-LEVEL FLOW KEEPING TEMPERATURES NEAR SEASONAL NORMALS.
LOW TO MID LEVEL MOISTURE WILL INCREASE ACROSS TEXAS THIS AFTERNOON AHEAD OF THE 500MB LOW/TROUGH ACROSS THE SOUTHWEST UNITED STATES/NORTHERN MEXICO THIS MORNING. DEVELOPING ACROSS PORTIONS OF NORTHWEST TX TONIGHT AS THE 500MB LOW/TROUGH MOVES SLOWLY EASTWARD.
421 AM CDT SAT APR 16 2016 EARLY MORNING SFC ANALYSIS SHOWS HIGH PRESSURE IN PLACE ALONG THE ATLANTIC SEA BOARD WHILE LOW PRESSURE DEEPENS OVER FAR WRN TX/ERN NM. WITH UPSTREAM RIDGING DEVELOPING OVER ERN TX. SWRN CONUS UPPER LOW IS PROGGED TO CONTINUE DRIFTING EWD/NEWD INTO TONIGHT WHICH SHOULD BEGIN TO BREAK DOWN THE DEVELOPING RIDGE ON TOP THE FORECAST AREA. RAIN CHANCES BEGIN INCREASING ON SUNDAY AS MID-LEVEL RIDGING GETS SHOVED EWD. MEANWHILE DISTURBANCES ROUNDING THE LOW ALOFT BEGIN TO CROSS THE WRN GULF REGION.
145 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL PROVIDE THE NORTH COUNTRY WITH FAIR AND DRY WEATHER THROUGH SUNDAY. HIGH TEMPERATURES WILL BE A FEW DEGREES WARMER EACH DAY.
626 AM EDT SAT APR 16 2016 DRY HIGH PRESSURE WILL BUILD SOUTHWARD OVER THE REGION THROUGH THE WEEKEND.
130 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL KEEP SUNNY SKIES AND MILD AIR OVER NEW YORK AND PENNSYLVANIA THROUGH THE WEEKEND.
MID LEVEL RIDGING HAS SHIFTED EAST OVER EAST TEXAS AND LOUISIANA. WITH HIGH PRESSURE STILL OVER THE NORTHWEST GULF. UPPER TROUGH PROGRESSING ACROSS THE INTERMOUNTAIN WEST WILL BECOME BLOCKED BY STRENGTHENING HIGH PRESSURE ACROSS THE EASTERN CONUS. LEE TROUGHING WILL DEEPEN ACROSS THE HIGH PLAINS IN RESPONSE TO THE APPROACHING UPPER TROUGH.
WHEN COLD FRONT EXPECTED TO PROVIDE ADDITIONAL FOCUS FOR THUNDERSTORMS.
329 AM CDT SAT APR 16 2016 A strong high pressure ridge aloft over the Midwest and eastern U. Winds will be 6 to 12 mph from the southeast most of the day due to a gradient between high pressure centered over the northeast U. and low pressure centered over New Mexico.
137 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL RIDGE INTO THE FORECAST AREA FROM THE NORTH THROUGH THE WEEKEND.
INTERESTING PATTERN CURRENTLY OVER OUR REGION WITH CUT OFF UPPER LOW OVER SOUTHERN ROCKIES AND WEAKENING NORTHERN BRANCH DRIFTING INTO CANADA TODAY. THE UPPER LOW TO THE SOUTH BEGINS TO DRIFT NORTH. THIS WILL ROTATE MOISTURE TO THE WEST AND NORTHWEST INVADING OUR FORECAST AREA AS THE UPPER LOW REACHES SOUTHERN WYOMING. COOL ENOUGH TO SEE SNOWFALL IN THE HIGHER FOOTHILLS.
A large upper level low will amplify and then close off over the Intermountain west through Sunday.
356 AM MDT SAT APR 16 2016 AN UPPER LOW SPINNING NEAR THE FOUR CORNERS AREA WILL CONTINUE TO PUMP MOISTURE INTO THE AREA TODAY AND TONIGHT. WITH THE NORTHERN FRONT RANGE URBAN CORRIDOR AND SOUTH PLATTE RIVER VALLEY TAKING THE LONGEST WITH WARMER TEMPERATURES IN NORTHERLY WINDS OFF THE CHEYENNE RIDGE. MAX TEMPERATURES ARE EXPECTED TO BE IN THE LOW TO MID 30S ALONG THE URBAN CORRIDOR AND ADJACENT PLAINS. MAINLY IN THE AREAS JUST SOUTH OF THE CHEYENNE RIDGE AND IN THE SOUTH PLATTE RIVER VALLEY. THE MAIN AREA OF CONCERN WOULD BE THE CHEYENNE RIDGE AND THE PALMER DIVIDE.
223 AM PDT SAT APR 16 2016 Strong high pressure will build over the Pacific Northwest this weekend.
214 AM PDT SAT APR 16 2016 High pressure builds over the region with winds remaining light.
411 AM CDT SAT APR 16 2016 (Today and Tonight) GFS/NAM/ECMWF all have the center of a large upper low over northwest New Mexico this morning, drifting northeastward over southern Colorado during the next 24 hours. Given good diurnal heating expected this afternoon under sunny skies over the Permian Basin, concomitant with a continuous stream of disturbances in the southwest flow aloft rotating around the upper low and over the dryline, thunderstorms will begin developing in earnest this afternoon. Lows tomorrow morning will be in the lower 60s, again under cloudy and rainy skies.
224 AM EDT SAT APR 16 2016 HIGH PRESSURE WILL KEEP SUNNY SKIES AND WARM SPRING TEMPERATURES OVER NEW YORK AND PENNSYLVANIA THROUGH THE WEEKEND.
LATEST SATELITE IMAGERY SHOWED AN AMPLIFIDE PATTERN OVER THE CONUS WITH A CLOSED MID TO UPPER TROUGH OVER THE WESTERN US AND A BLOCKING MID TO UPPER RIDGE OVER EASTERN US. TAKING THAT INTO ACCOUNT WENT WITH THE COOLER GUIDANCE FOR AFTERNOON TEMPS WITH HIGHS FROM THE UPPER 60S TO THE LOWER 70S. FOR TONIGHT SOME DRYER AIR IN THE LOWER LEVELS WILL COME INTO THE NORTH CENTRAL AND NORTHEAST COUNTIES OVERNIGHT AS HEIGHTS GRADUALLY RISE. EXPECTING A COOL NIGHT WITH LOWS FROM THE LOWER 50S EAST TO THE LOWER 60S WEST. IT WILL BE ANOTHER COOL NIGHT FOR SUNDAY NIGHT WITH LOWS IN THE LOWER 50S EAST TO AROUND 60 WEST.
144 AM EDT SAT APR 16 2016 TEMPERATURES ARE RUNNING SEVERAL DEGREES WARMER UP NORTH IN THE BROADER VALLEYS AND BLUEGRASS COMPARED TO FORECAST. WHILE SOME OF THE MORE SHELTERED VALLEYS IN THE SOUTH ARE ACTUALLY RUNNING COOLER. HAVE ADJUSTED THE LOWS BASED ON THESE TRENDS IN OBSERVATIONS. EXPECT LOW TO MID 40S FOR MOST OF THE COOLER VALLEY LOCATIONS. TWEAKED HIGHS UP SOME TOMORROW AS WE HAVE BEEN TRENDING 3 TO 5 DEGREES ABOVE FORECAST HIGHS FOR SEVERAL DAYS NOW AND SEE NO REASON TEMPERATURES WILL BE COOLER TOMORROW. UPPER LEVEL LOW PRESSURE NEAR KMEM WAS DISSIPATING TODAY. WHICH WILL LEAVE A BLOCKING RIDGE AT ALL LEVELS CENTERED TO OUR NORTH AND NORTHEAST AS OUR DOMINANT INFLUENCE THROUGH THE PERIOD.
1011 AM EDT WED AUG 31 2016 A cold front will cross the area today, bringing a good chance for showers and thunderstorms. After the front travels south of the region tonight, high pressure and a dry airmass will build in through the weekend.
748 AM EDT WED AUG 31 2016 A cold front will move across the commonwealth late today through early Thursday.
1106 AM EDT WED AUG 31 2016 A cold front will slide through the region late this afternoon and tonight with scattered showers and thunderstorms. Behind this front, cooler and dry weather will last into the weekend as a large Canadian high pressure system dominates our region. Models suggest a second surge of isolated to scattered convective activity along the sfc front and high amplitude upper trof dropping out of Canada developing early this evening before ending overnight. Much cooler Canadian high pressure will slide across NY State on Thursday. With the upper level trough axis moving across the region on Thursday, we can't rule out an isolated rain shower during the day.
A cold front will bring scattered showers and thunderstorms later today and tonight. A cooler pattern will follow for the remainder of the week. However, profiles will take on more of a moist adiabatic appearance with time as the lower levels moisten up. A post frontal trough could spark a few showers tonight, so held on to PoPs just a bit longer then previous forecast.
These are forming along a convergence axis that extends from NE TN W/SW towards central MS and is a result of a low pressure over east-central GA/western SC and high pressure to our west. For today, as the low pressure system south of Hudson Bay drops S/SE through the day it will push a weak pre-frontal trough that is currently over the OH River Valley south through the region. The drier air in place yesterday continues to linger over the area but should be pushed back to the east as the trough moves in. The best chances for convection today will be across the higher terrain of NE AL and southern middle TN. Made a few minor tweaks to the PoPs for Thursday with the best chances again forecast to be across the higher terrain of NE AL and southern middle TN.
A ridge of high pressure will continue to shift east today. An upper level trough of low pressure will move across the region through this weekend. Mid level ridging has shifted east over the last 24 hours with axis now oriented N-S across WY/CO, this as further amplification and slight SE translation of the upstream pacific trough has occurred. Further encroachment of the long wave trough will shift the aforementioned jet over eastern NV and far western Utah this evening, with a maxima rounding out and settling over southwestern Utah tonight, then much of the area tomorrow. Additionally, as the jet noses east tonight any convection that develops should largely remain of the high based shower/virga variety in northern/central Utah due to sub par lapse rates/instability, so have removed mention of thunder for those areas.
720 AM CDT WED AUG 31 2016 Despite the initially warm/humid start this morning, a cold front is on track to move through the region today and ultimately bring an eagerly anticipated cooler/drier air mass into the region tonight. Scattered SHRA/TSRA are expected to develop near and ahead of the front today, especially during the afternoon when an upper trough will be moving across the area. Pcpn will end with fropa, and a much cooler and drier air mass then spreads into the region tonight. Overnight lows will be around 10 degrees cooler than last night. Kanofsky Expect cooler and drier post-frontal conditions for Thu, Fri, and probably most of Sat.
Appropriately for the first day of meteorological autumn, a cold front will approach North Texas on Thursday. /ISSUED 348 AM CDT WED AUG 31 2016/ Morning water vapor and satellite imagery show the weak upper low that was along the TX Coast the last few mornings has now settled a little farther south into the Gulf of Mexico. a very weak trough axis remains in place in Central Texas which will still support some convection in the moist uncapped environment. the center of a 500mb ridge continues to shift slowly westward but also continues to weaken as it does. This drying should become a little more pronounced later today as the ridge continues to move west. While the front itself won't bring significantly cooler air.
The upper ridge continues to slightly weaken as it slowly drifts southwestward across North Texas and will likely be capable of suppressing most convection this afternoon. Will continue to assess new guidance regarding the additional rain and thunderstorm chances with the weak cold front expected overnight and Thursday. Appropriately for the first day of meteorological autumn, a cold front will approach North Texas on Thursday.
A few isolated to scattered showers and storms will be possible this afternoon and evening ahead of an approaching cold front but confidence is too low to include VCTS in the terminals at this time.
1226 PM EDT WED AUG 31 2016 A cold front will cross the region late today and tonight.
A modest cold front will move through southwest Washington and northwest Oregon today, bringing cool temperatures and some light rain or showers to much of the forecast area.
Due to dryness in the lower levels the main effect from thunderstorms will be gusty downdraft/outflow winds.
633 AM CDT WED AUG 31 2016 WV imagery this morning revealing a well amplified upper ridge extending nwd from the nrn Rockies into wrn Canada. obs were depicting a cold front arcing from the Dakotas to nrn IA to the wrn Great Lakes. Going highs temps still look reasonable with near normal values in the low 80s today/Thur/Fri. ECM/GFS/CMC advertise pcpn making a return to the central plains in response to upper level ridge axis shift east with several impulses ejecting out of the swrn conus.
1023 AM EDT WED AUG 31 2016 Isolated showers and thunderstorms are possible later today, mainly in the higher terrain, and will dissipate quickly after sunset. Chattanooga Airport, TN 94 72 90 67 / 20 20 40 0 Knoxville McGhee Tyson Airport, TN 91 70 86 64 / 20 20 40 10 Oak Ridge, TN 92 71 86 63 / 20 20 40 0 Tri Cities Airport, TN 89 66 82 59 / 20 20 50 10.
High pressure continues to build southeast across the Upper Midwest and into the Great Lakes over the next few days. The leading cold front is moving through northeast Illinois early this morning. After daybreak the cold front will be south of the area across Central Illinois, but dewpoints will be slower to fall. KMD 216 AM CDT High pressure builds over eastern Canada and southward over Lake Michigan for dry and sunny conditions with highs in the 70s.
mainly in the Delta and over ridgetops. Temperatures are running a few degrees warmer early this morning compared to 24 hours ago, as high cloudiness associated with a weak disturbance moved across the area overnight. The primary weather feature this week is an upper-level trough of low pressure along the West Coast, as indicated by water vapor satellite imagery. Main impacts from this system will be synoptic cooling, as well as locally breezy winds near the Delta- influenced area and over mountain ridgetops.
936 AM EDT WED AUG 31 2016 A cold front will cross the region late today and tonight.
Surface analysis shows a ridge of high pressure over Lake Winnipeg and an area of low pressure over James Bay. High pressure will dominate the weather pattern through Thursday with a light north to northeast wind, clear skies, very seasonable temperatures and low humidity readings during the day. A few cumulus clouds will develop Thursday afternoon as high pressure sends a reinforcement of cooler air aloft.