Aikyam-Lab/Synoptic-Bench huggingface dataset:
1051 AM EDT MON SEP 5 2016 Upper level ridge continues overhead and keeps the area dry for the next few days.
Lower rain chances today with drier air and cooler temperatures. Weak trough axis across N FL this morning will continue to shift southward into the afternoon with some showers and areas of drizzle along and south of the boundary expected. Strengthening high pressure ridge axis across central GA will continue to nose southward through the day with dry air suppressing convection across SE GA and shunting deeper moisture across our southern zones generally GNV to SGJ southward by mid afternoon where a low chance of showers or a tstorm will be possible until early evening. Cloudy skies will accompany the trough axis this morning. then as drier air works over the area from the north through the day more erosion of the low clouds will occur yielding to mostly sunny skies over SE GA and partly cloudy skies for NE FL.
918 AM EDT MON SEP 5 2016 A ridge of high pressure will extend from the New England States to the Ohio Valley through Tuesday.
1125 AM EDT MON SEP 5 2016 Fair weather expected to continue through this week, as dry high pressure dominates. The center of the high will push further southward towards the southeastern states through tonight.
920 AM MDT MON SEP 5 2016 Water vapor imagery shows upper low lifting to north central MT, with dry slot surging into southeast MT. As the Pacific trough continues to move across the area this morning, some light showers remain. With the reduced rainfall and cloudiness, have temperatures a little warmer today.
Limitations that might keep storms from getting too strong could be the low convective temperature of 85 F and heavy showers already along coastal areas. The first is an inverted trough stretching from SE TX to SE LA. The 850mb front will progress westward later this morning causing the tail end of the front and inverted trough to move inland.
720 AM EDT MON SEP 5 2016 Aviation High pressure will move east allowing a southerly flow of warm and humid air.
1137 AM EDT MON SEP 5 2016 A ridge of high pressure will extend from the New England States to the Ohio Valley through Tuesday.
Cooler than normal conditions will continue for interior locations through Monday. Northwest CA sits under the leading edge of a building ridge of high pressure aloft. The higher pressure aloft will also promote continued clear skies over the interior with gradually warming temperatures.
Frontal trough will push southwest from north of the Cape toward southern portions of east central Florida by late afternoon. Deep moisture ahead of this feature will support scattered to numerous showers and a chance for lightning storms as the low level convergence boundary moves south and west through the area into early evening. The high rip current risk will likely continue into mid week with moderate northeast swells continuing into Tue and Wed.
925 AM PDT MON SEP 5 2016 A trough of low pressure moving inland across California will keep a deep marine layer in place through Tuesday.
A upper level trough extending from the northern Rockies south through the Great Basin will move slowly east across the region during the first half of the week. Cold front that moved through much of the area overnight is now near a KCDC-KVEL line, with some high clouds accompanying the boundary. A bit of lingering moisture and instability will allow for a few showers over the higher terrain of eastern Utah, but the vast majority of the area will remain dry. However, this will be limited by the back end of the main Pacific trough slowly moving through the area. The trough will be weakening and the airmass will remain quite dry, so little to no associated precipitation is expected.
The axis of a broad upper level trough has shifted east of our area. This has left a cold northerly flow aloft into our area on the back side of the trough. A cold front will follow to the Oregon coast early Tuesday morning then it will swing across the state into the afternoon.
1138 AM CDT MON SEP 5 2016 Short Term (Today - Tuesday night): The high pressure which brought us several days of near perfect weather is far enough east of us that we'll lose its influence today. The transition to warmer and more humid conditions will occur today although the humidity levels will be tolerable this morning.
/issued 346 AM CDT MON SEP 5 2016/ (labor Day and Tonight) The forecast area will be on the western periphery of an upper level ridge centered over the southeastern CONUS through tonight. The bulk of the low to mid-level gulf moisture flowing into southeast and East Texas around the upper high should not dramatically affect our forecast area today but may increase the chance of showers and thunderstorms over our southeastern counties this afternoon and evening. The remainder of the CWA should see highs in the lower 90s. Morning lows tomorrow will be in the lower 70s.
632 AM CDT MON SEP 5 2016 Manual 00z upper-air analysis revealed a prominent mid-level trough from the Canadian Rockies to Great Basin with a weaker downstream impulse embedded within prevailing southwest flow over the Dakotas. In the low levels, a cold front stretched from northwest Minnesota through central South Dakota into northeast Colorado early this morning.
Post Tropical Cyclone Hermine continues to churn over the Atlantic producing dangerous rip currents and gusty winds along the northeastern seaboard. Closer to home, surface and upper level ridging is firmly in place across much of northern and central Alabama this morning. Based on current temperatures in the lower 80s in most locations, lower 90s look like the general rule again today.
644 AM CDT MON SEP 5 2016 Ridge of high pressure that provided cool/dry weather to central Illinois over the past couple of days has shifted eastward into the Appalachians. This will help bring warmer and more humid conditions back into the area today. to the lower 70s west of I-55. Blocking pattern will remain in place across the central/eastern CONUS through mid-week, as remains of Hurricane Hermine meander off the Mid-Atlantic coast.
743 AM EDT MON SEP 5 2016 A ridge of high pressure will extend from the New England States to the Ohio Valley through Tuesday.
The storms are along or just ahead of the 1000-500mb thickness ridge - riding strong moisture transport in the 925-850mb layer. We dropped the high temperature a few degrees already, but might have to lower temps even more. That could happen this afternoon, but widespread convection might hold off until tonight when the low level jet increases once again.
1108 AM EDT Mon Sep 5 2016 High pressure will provide mostly dry weather and a warming trend through midweek. High pressure should maintain dry weather and mostly clear skies through tonight. As the 500 mb ridge axis continues its slow march south, Tuesday will again feature plenty of sunshine and even warmer temperatures as 850 mb temps nudge upward. A few high clouds may spill over the ridge starting during the afternoon and continuing during the night.
/Issued 305 AM CDT MON SEP 5 2016/ Return southerly flow is underway with both temperature and dewpoint values noticeably warmer than recent nights.
To add to that, there are synoptic (low level trough/convergence) and mesoscale/storm scale forcing (outflow boundaries) that have been focusing the convection. The main changes to the forecast package were to raise the PoP in many areas based on radar and model trends, and lowered both the hourly temperatures and the highs today. Limitations that might keep storms from getting too strong could be the low convective temperature of 85 F and heavy showers already along coastal areas. The first is an inverted trough stretching from SE TX to SE LA. The 850mb front will progress westward later this morning causing the tail end of the front and inverted trough to move inland.
844 AM EDT MON SEP 5 2016 Marine High pressure will move east allowing a southerly flow of warm and humid air.
735 AM EDT MON SEP 5 2016 A blocking ridge aloft will keep central Pennsylvania dry and unseasonably warm, with slowly increasing humidity as the week progresses. High temps will be perhaps 2-4 deg warmer in most areas than today. In the mean time, the upper ridge will keep us fair through midweek before shower chances begin to ramp up along with an increase in the humidity.
Skies will remain mostly clear overnight as high pressure builds in from the northeast. Later this evening, the H5 ridge continues to build into the region from the northeast, continuing to suppress shower activity.
950 AM EDT MON SEP 5 2016 Post Tropical Cyclone Hermine will continue to lift slowly northeast along the East Coast through late week as high pressure persists over the Southeastern States. Fair weather will prevail for the next several days as high pressure surface and aloft remains over the area while vertically stacked low pressure continues off of the east coast. Some cloudiness expected for mainly NE coastal sections as another short wave rotates around back side of upper low, but models in agreement that precip threat will remain off coast. Subtle changes to surface pattern as Post Tropical Hermine is forecast to move NW, producing slight tightening of pressure gradient over Eastern NC between Hermine to NE and high pressure to SW.
1055 AM CDT MON SEP 5 2016 Although short-term models indicate a nearly saturated layer moving into western Oklahoma very soon, the low clouds over the Texas panhandle have dissipated much more quickly than was the case the last several days.
1250 PM EDT MON SEP 5 2016 Post Tropical Cyclone Hermine will continue to lift slowly northeast along the East Coast through late week as high pressure persists over the Southeastern States. Fair weather will prevail for the next several days as high pressure surface and aloft remains over the area while vertically stacked low pressure continues off of the east coast. Some cloudiness expected for mainly the east half of the area as another short wave rotates around back side of upper low, but models in agreement that precip threat will remain off coast. Subtle changes to surface pattern as Post Tropical Hermine is forecast to move NW, producing slight tightening of pressure gradient over Eastern NC between Hermine to NE and high pressure to SW.
High pressure blankets the Eastern United States, part of a discontinuous subtropical ridge across the western Atlantic. A spoke of low pressure has pivoted through the northern Bahamas, trailing from the large subtropical circulation of Hermine. It appears the low pressure spoke has driven some continental air southward into the Florida peninsula. The wind field should become more diffluent in the lower levels as the nearby landmasses heat up.
(Issued 217 AM CDT MON SEP 5 2016) AT 200 am under clr skies temps were mainly in the low to mid 70s with mid 60 dewpoints. Whats left of Hermine is now along the NE coastline, while an upper high builds across much of the sern US.
High pressure will remain anchored to the north of the waters, with persistent east to northeast winds.
Upper level trough that impacted the region yesterday has pushed into Montana this morning. The exiting trough has allowed temperatures to fall into the 30s and 40s this morning from good radiational cooling with patchy fog in sheltered river valleys. Wrap around moisture from this trough continues to produce showers mainly across the central Idaho mountains through this evening. Upper level trough axis currently in eastern Idaho is exiting east and taking the showers with it.
622 AM CDT MON SEP 5 2016 Short Term (Today - Tuesday night): The high pressure which brought us several days of near perfect weather is far enough east of us that we'll lose its influence today. The transition to warmer and more humid conditions will occur today although the humidity levels will be tolerable this morning.
Massive upper level low pressure system continues to spin over the Twin Cities region this afternoon, with areas of light snow wrapping south across the CWA. Accums have been very minimal and this will be the trend heading into the overnight hours as the low pressure system only slowly moves eastward.
However approaching low pressure trof and lingering cyclonic curvature should continue to bring scattered light rain and snow showers to southern WI through the late night. Temperatures should remain at or slight above freezing so minimum travel difficulties are expected with little if any snow accumulation. Lingering cyclonic curvature and passing weak mid- level short wave trof will result in lingering light rain and snow showers with minimum visibility restriction. Southwest winds will veer to the west tonight as low pressure surface trof weakens and passes to the east of the area. Light precipitation is expected this evening into Thursday as low pressure moves through the state.
Showers will decrease overnight as a trough moves inland. Weak high pressure will build into the area Thursday.
628 PM CST Wed Nov 30 2016 Updated for 00Z aviation discussion 00Z TAF discussion: VFR flight conditions are expected through the next 24 hours as high pressure moves into the region. Latest satellite imagery showed a closed upper low centered over the Upper Mississippi Valley. This was associated with an upper trough which dipped down into the Lower Mississippi Valley. Some cold advection winds from the tight pressure gradient in the wake of the cold front was making its way to the surface in the form of occasional 20-25 mph wind gust. As far as temps are concern lows tonight will be from the lower 30s north to the middle 30s elsewhere. Highs for Thursday will range from the upper 50s to the lower 60s.
Once this line moves out a drier airmass moves into the area as high pressure build in from the TX gulf coast. That cooler drier airmass begins to filter into NW GA tonight with temps expected in the Mid to upper 30s across NW GA.
915 PM EST Wed Nov 30 2016 A developing area of low pressure will move through the Gulf of Maine tonight into Thursday.
932 PM EST Wed Nov 30 2016 An approaching cold front will cross the area this evening. Near record high temperatures today will lower to near normal for Thursday behind the cold front.
824 PM CST Wed Nov 30 2016 Upper low over the nrn midwest has wrap arnd clouds associated with it but these clouds should stay north of the cwa. The previously mentioned mid-level trough is predicted to spread east-northeastward into southern Quebec and New England on Thursday- Thursday night.
Under clear skies and light winds, overnight temps to radiate down to near freezing across the interstate 30 corridor and low to mid 30s elsewhere. Low-level moisture across the region could lead to patchy frost in areas where the temperatures approach freezing.
943 PM EST Wed Nov 30 2016 A cold front has moved east of the area this evening.
The upper low that brought the snow and very windy conditions to the far eastern portions of our forecast area the past couple of days continues to slowly move east across Minnesota and Wisconsin. However, this low continues to wrap low clouds and areas of light snow westward across the western Dakotas and extreme eastern Montana.
Winds will be fairly light during the overnight period, so temperatures should be able to radiate down to the lower teens northwest to lower 20s southeast.
642 PM EST Wed Nov 30 2016 A cold front moves through this evening. Cooler high pressure to end the week.
932 PM CST Wed Nov 30 2016 High pressure to build over the region tonight. /issued 352 PM CST Wed Nov 30 2016/ Skies have cleared across the region this afternoon as the cold front that pushed through the area overnight has moved into Georgia and eastern Alabama. One relatively nice day tomorrow with high pressure centered over the region. Winds will gradually shift as the high progresses across from northeasterly to easterly by Thursday night.
The line of showers, followed almost immediately by the cold front, will continue to steadily progress southeastward across southeast Georgia this evening and into the early morning hours, and then across northeast Florida from early Thursday morning through the afternoon hours. Low stratus though will accompany the light rain along the cold front. Temps will remain mild overnight with cooler air slowly advecting in behind the cold front from northwest to southeast on Thursday. Lower ceilings will move in ahead of an approaching area of light rain along a cold front during the early morning hours. Ceilings will gradually rise on Thursday behind the area of light rain as the cold front moves southward and northerly winds slowly usher in some cooler and drier air.
Upper level trough over the region this evening will quickly exit by early Thursday morning. Fog should dissipate by noon Thursday as the northwesterly winds increase in response to the incoming upper level ridge.
548 PM CST Wed Nov 30 2016 Stacked upper low pressure system over Minnesota and Wisconsin today, with a broad area of clouds and lingering light precipitation. Lows tonight will be in the low 30s, only rising into the mid 30s tomorrow.
730 PM EST Wed Nov 30 2016 Evening IR and Water Vapor satellite imagery is showing a band of clouds and moisture associated with an approaching cold front extending from the New England into the central Gulf of Mexico. High pressure ridging into the eastern Gulf from the Atlantic will continue to shift east as a cold front approaches the area tonight and crosses the coastal waters on Thursday. Winds will shift to northerly than northeasterly behind the front as high pressure fills in from the northwest.
346 PM MST Wed Nov 30 2016 Despite weak ridging aloft this Wednesday afternoon, a shallow, saturated dendritic growth layer combined with light upslope flow has kept some snow showers going in the northern mountains of western Colorado. The 500mb ridge axis is currently progged to cross the UT/CO border before midnight tonight.
Closed upper low is situated over the far western Great Lakes and will be slipping across northern Michigan tonight. with the primary cold front arcing down through Lake Huron. But better lake response and increasing precip chances will come overnight as upstream mid level trough axis/QG-forcing/deeper moisture now back across Minnesota/Wisconsin swings through the region. Thermal profiles just get cold enough tonight to support mixed rain/snow showers in the inland higher terrain, but no appreciable snow accumulations anticipated, particularly with surface temps remaining above freezing.
The short term focus was mostly on overnight lows for Thursday morning due to the prospect of some freezing temperatures across the Hill Country and Plateau areas. Thus, a good radiational cooling set up should take place tonight and allow temps to plummet into the lower thirties in low lying areas and our typically colder locations in the Hill Country.
657 PM EST Wed Nov 30 2016 An approaching cold front will cross the area this evening. Near record high temperatures today will lower to near normal for Thursday behind the cold front.
The deep closed low to the northeast that helped to give us sky cover/flurries today will continue off to the east. The lessening influence of the closed low, along with less instability toward sunset, will shut off our chance of flurries come evening.
645 PM EST Wed Nov 30 2016 A crossing cold front will bring another round of rain showers tonight and cooler temperatures for the remainder of the week. Showers continue east of Pittsburgh as warmer moist air ascends ahead of an approaching cold front. Gradually colder though the period as a mid level trough slowly moves across eastern Canada.
A mid-level trough -- currently situated across the upper/mid MS valley region -- will continue to lift northeastward into southern Ontario and the eastern Great Lakes through tonight. At the surface, a cold front has pushed across the entire forecast area and will advance eastward into the southern Appalachians this evening. Latest satellite data indicates that a mid-level cloud deck will erode from w-to-e during the remainder of the afternoon, with clear skies and the advection of cooler/drier air into the region resulting in lows in the mid 30s-around 40. The previously mentioned mid-level trough is predicted to spread east-northeastward into southern Quebec and New England on Thursday- Thursday night.
Upper level trof axis. associated with the closed low over the upper Midwest. In the wake of the departing trof.
The exception to that may be a few sprinkles late this afternoon/early evening as an upper trough passes through. That may change over the next few hours as the trough intersects some better low level moisture. Other than that, expect low temps tonight in the low to mid 30s. Highs tomorrow will be limited to the 40s in the colder airmass behind this passing trough.
Meanwhile, an appraisal of Doppler radar base reflectivity data indicates an outbreak of low-topped rain showers over the lower Straits of Florida during the last few hours. An upper-level composite analysis shows a deep layer mean anticyclone centered near the Bahamas and weak large-scale subsidence seems to persist over the area, as evidenced by maintenance of a strong subsidence inversion layer based around 8000 feet elevation. However, in the lower levels, weak warm thermal advection has led to some thermodynamic destabilization during the last 24 hours, and a few terrain-borne convergence zones (boundaries) from Cuba have migrated northwestward across the Straits in south-southeast flow, providing a focus for shower development. An area of high pressure over the western North Atlantic overnight will shift eastward on Thursday.
Cold front will continue to move east through Middle Tennessee this afternoon with clearing line back along the Mississippi River at early afternoon. High pressure will settle in behind the front tonight and on Thursday bringing a cool down in temps more typical for this time of the year but lots of sun for the last 2 days of the work week.
Freezing overnight temperatures will occur over the Kern County desert with a freeze possible in parts of the San Joaquin Valley as well, especially later this week. The dying cold front expected to push through late tonight may allow for enough mixing to prevent the formation of thick fog.
318 PM MST Wed Nov 30 2016 Despite weak ridging aloft this Wednesday afternoon, a shallow, saturated dendritic growth layer combined with light upslope flow has kept some snow showers going in the northern mountains of western Colorado. The 500mb ridge axis is currently progged to cross the UT/CO border before midnight tonight.
Low pressure lifting northeast out of the Great Lakes tonight and Thursday will bring cooler westerly flow to the region.
527 PM CST Wed Nov 30 2016 At 3 PM, a low pressure area was centered over west-central Wisconsin. Any snow amounts from late this afternoon into tonight will be mainly confined to southeast Minnesota, northeast Iowa, and the higher terrain in western Wisconsin. With extensive cloudiness and neutral temperature advection at both the surface and aloft tonight, did not deviate much from the low temperatures that occurred this morning. For Thursday, the surface and upper level low will slowly move east northeast across central Wisconsin during the morning and upper Michigan during the afternoon.
601 PM EST Wed Nov 30 2016 A cold front will continue east across the area into this evening as low pressure across the Upper Great Lakes slowly shifts east.
Upper low to quickly push east into the Great Lakes region by early Thursday. Could see some sun peek through across the south, however still expect stratus to linger closer to the low across northern Iowa through the day. An upper low will migrate over the Hudson Bay and gradually fill.
943 PM EST Wed Nov 30 2016 A cold front will approach the area this afternoon and then move across central NC this evening.
High pressure centered over the central Bahamas will keep a fairly benign weather the remainder of the afternoon with southeast flow continuing with a few gusts over South Florida. The high begins to weaken into Thursday as frontal boundary approaches the panhandle and central Florida pushing the high further east.
A series of cold front fronts will cross Indiana over the rest of the week.