Aikyam-Lab/Synoptic-Bench huggingface dataset:
An upper level ridge currently over the Rockies will gradually build eastward to become centered over the Plains on Friday. At the surface, the region will be situated between high pressure to the north and to the southeast, with a weak frontal boundary over southern South Dakota. A low pressure system will approach from the west later tonight, with the associated frontal boundary just reaching the western CWA by late Friday afternoon.
1148 PM EDT Thu Jun 8 2017 The upper low that has resided across the region the past several days, and brought us a string of days with below normal temperatures will finally begin to lift northeast and away from the region tonight and Friday.
/ISSUED 342 PM CDT Thu Jun 8 2017/ Mostly dry across SE TX this afternoon as a pocket of dry air indicated on water vapor satellite imagery filters in from the north along the back side of an upper level low.
908 PM EDT Thu Jun 8 2017 The upper low that has resided across the region the past several days, and brought us a string of days with below normal temperatures will finally begin to lift northeast and away from the region tonight and Friday.
805 PM EDT Thu Jun 8 2017 The upper low that has resided across the region the past several days, and brought us a string of days with below normal temperatures will finally begin to lift northeast and away from the region tonight and Friday.
526 PM MDT Thu Jun 8 2017 Current watervapor loop over the western United States shows the upper level ridge axis moving into eastern Wyoming and central Colorado this afternoon. As the upper level ridge slides east of the area on Friday, deep southwest flow is expected over the area with even warmer temperatures compared to today with highs in the mid 80's to mid 90's.
Clouds have finally moved out of the region as the low moves up the Eastern Seaboard. Mostly clear skies overnight will allow temps to drop into the low 60s before sunrise.
615 PM CDT Thu Jun 8 2017 Updated to bolster PoPs across the northern zones early this evening, before expanding this higher potential south overnight. Ridge will start to build over the area tomorrow which will bring an end to precipitation chances while also bringing an increase in temperatures.
1020 PM EDT Thu Jun 8 2017 Showers have just about ended in northern parts of our area with stabilization after sunset and the departure of a midlevel trough to the east.
/issued 258 PM CDT Thu Jun 8 2017/ SHORT TERM (Tonight through Friday Night): The weather rounding out the work week will be picturesque as high pressure remains the dominate feature. Meanwhile, temperatures will continue to run a few degrees above normal, but slightly higher moisture levels could keep temperatures a smidge cooler for Friday. This wave will eventually become closed low cut off from the main flow over the western Gulf.
High pressure will build in overnight and set the stage for excellent radiational cooling conditions under clear skies with calm winds.
649 PM CDT Thu Jun 8 2017 Updated for 00Z aviation discussion 00Z TAF discussion: Continued VFR conditions are anticipated through the next 24 hours as high pressure remains in control of the region's weather. Temperatures will likely be a degree or two warmer and moisture will slowly increase through the day from the south, but remain below an inch.
836 PM EDT Thu Jun 8 2017 The upper low that has resided across the region the past several days, and brought us a string of days with below normal temperatures will finally begin to lift northeast and away from the region tonight and Friday.
509 PM MDT Thu Jun 8 2017 Upper level analysis shows a large ridge building over the Rockies, with northwest flow through the northern plains. Upper ridge will shift over the northern plains Friday, and winds will become southwesterly ahead of an approaching low-level trough. A fast-moving upper wave will pass to the northwest of the CWA Friday night, briefly flattening the ridge, and a cool front will move through the region.
An upper low shifts from southwest PA to southern New England while continuing to trough down over the Gulf of Mexico. Throughout the night the boundary sags to the south of Lake Okeechobee as the low tracks along it. Drier air working into the area and the loss of daytime heating and energy from the low will shut down the few remaining showers during the next hour or two. reducing the high rip current risk. A frontal boundary with an area of low pressure bisects the terminals tonight. Relaxed high pressure building in from the north while a frontal boundary exits to the south will allow winds to diminish and become mainly north and northeast.
/issued 933 PM CDT Thu Jun 8 2017/ High pressure remains firmly in control this eve w/ dewpoints ranging from the mid 50s to lower 60s down twrds the coast. The area also remains under northerly flow aloft on the backside of an upper low over the eastern US. /issued 252 PM CDT Thu Jun 8 2017/ Latest water vapor imagery shows an upper level trough along the east coast with dry northerly flow around the trough across the forecast area.
Expect a bit more sunshine once morning low clouds burn off, so it will feel warmer with mid to upper 80s coast and around 90 over the interior.
733 PM EDT Thu Jun 8 2017 High pressure will continue to pass by south of the region giving way to a weak cold front.
Another fantastic day is on tap for tomorrow, though a few degrees warmer. A broad area of relatively weak high pressure covers the region this evening, with cool temperatures and low dew points resulting in benign weather as we head toward the weekend.
1247 AM EDT Fri Jun 9 2017 Low pressure will approach from the south tonight and track south of the Gulf of Maine on Friday.
822 PM CDT Thu Jun 8 2017 An upper trough continues to move north away from the local area pulling any lift along with it. Couple that with light winds, and lows will be able to drop into the lower to middle 50s. For comparison, normal lows for this time of year are in the lower to middle 60s. This should allow for a slightly warmer day on Fri, as afternoon highs climb more into the lower 80s with scattered cu again developing over much of the area.
/issued 615 PM CDT Thu Jun 8 2017/ Updated to bolster PoPs across the northern zones early this evening, before expanding this higher potential south overnight. Ridge will start to build over the area tomorrow which will bring an end to precipitation chances while also bringing an increase in temperatures.
919 PM EDT Thu Jun 8 2017 Weak low pressure off the North Carolina coast will continue to move northeast tonight.
744 PM EDT Thu Jun 8 2017 An upper-level low pressure system centered over the eastern Ohio Valley will drift east of the region by Friday. Clear skies will abound tonight as winds go slack and permit temperatures to drop into the lower and middle 50s. Dewpoints in the mid to upper 40s will inhibit any fog development outside of the lower Scioto and Ohio River valleys, or other fog-prone areas for an hour or two before sunrise. The closed low that had been situated over eastern portions of the region will transition to an open wave as it reunites with the main steering-layer flow over eastern U. Nevertheless, expect highs to range from the lower 80s in the south to the mid 70s in the north.
With southerly flow in the lowest 5k feet will begin to see moisture return overnight and this should be enough for MVFR cigs to develop 12Z-13Z. Northwest flow continues aloft in the atmosphere with high pressure centered to the west of Texas.
754 PM EDT Sun Jul 16 2017 High pressure will slide offshore tonight.
858 PM PDT Sun Jul 16 2017 Breezy winds will subside after sunset leading to a cooler than average night tonight.
Chattanooga Airport, TN 70 89 70 90 / 20 30 10 20 Knoxville McGhee Tyson Airport, TN 66 89 68 89 / 10 10 10 10 Oak Ridge, TN 65 89 69 90 / 10 10 10 10 Tri Cities Airport, TN 64 88 64 88 / 0 20 10 10.
1054 PM EDT Sun Jul 16 2017 Weak offshore high pressure continues to move farther out into the western Atlantic, while a dissipating cold front approaches to start the week.
Otherwise, mostly cloudy overnight with lows in the lower 70s. Overnight lows will generally be in the low to mid 70s across the area.
1233 AM EDT Mon Jul 17 2017 Skies will begin to clear later this morning as high pressure builds into the region accompanied by seasonably cool weather to start the week.
A ridge of high pressure will build eastward into the Central and Southern Plains on Monday and result in increased subsidence, fewer clouds and lower rain chances across North Texas. The coming week will be hot as an upper level ridge currently centered to our northwest builds east across the Central Plains.
The overall synoptic pattern is one of mid level ridging over much of the Great Plains and the west while the mean westerlies remain north along the Canadian boarder. At the surface, a broad ridge of high pressure stretching from the upper Midwest to the southern high plains was gradually weakening and a relatively moist boundary layer remained over central and eastern KS. So the forecast is calling for highs similar of slightly warmer than todays with readings in the lower and mid 90s. The weather pattern for the upcoming week will be dominated by a large upper level ridge across the central CONUS with the jet stream shunted up into the northern states.
High pressure will then build in to bring dry weather and seasonably cool weather to start the week.
Skies were clear with temperatures in the low to mid 80s. As expected, the bulk of the convection along a weak cold front is ongoing across central IL and northeast MO. Convection has begun to develop this afternoon across eastern IA and northern IL along a weak cold front stretching across northern IL & IN up into MI. Highs tomorrow will be near or 1-2 degrees warmer than today.
523 PM MDT Sun Jul 16 2017 Plume of deep moisture continues to linger over our CWA (apparent on WV imagery), with mid-upper low near CO border. Monday: Main mid-upper low should be northeast of our CWA, but lingering forcing on back side of system may support continued shower and thunderstorms chances in our northeast and east.
754 PM EDT Sun Jul 16 2017 A cold front just north of Lake Erie will continue to move slowly south and is expected to cross the local area overnight and early Monday.
1025 PM EDT Sun Jul 16 2017 As high pressure drifts east, an approaching frontal system will bring a return to more humid weather with a chance for showers and thunderstorms tonight and Monday.
1218 AM EDT Mon Jul 17 2017 A cold front will stall out across northern Maine tonight and will lift back to the north as a warm front on Monday.
1154 PM CDT Sun Jul 16 2017 Upper level high pressure will dominate the region through Monday and result in VFR conditions with only scattered to broken high clouds. The coming week will be hot as an upper level ridge currently centered to our northwest builds east across the Central Plains.
Convection has begun to develop this afternoon across eastern IA and northern IL along a weak cold front stretching across northern IL & IN up into MI. Highs tomorrow will be near or 1-2 degrees warmer than today.
1043 PM EDT Sun Jul 16 2017 A cold front dropping south through the Great Lakes will bring a slight chance of showers and thunderstorms to the region tonight into the early part of the the work week. By Monday morning the upper s/w will be east of the region, but a sfc trof will be lingering across the ern zones. A few storms could linger into the evening hours, but overall expect Monday night be dry, with lows in the lower to mid 60s.
653 PM CDT Sun Jul 16 2017 Cold front is dropping southward early this afternoon and has recently cleared Galesburg and Peoria. With freezing levels above 14kft, large hail may have a hard time making it to the surface, but some storms may pulse up enough for some brief hail/wind threats. High pressure will move across the Midwest on Monday, with a brief period of less humid air to enjoy, before the heat wave arrives.
Otherwise tstm activity has ended over the higher terrain and no further development is expected. Drier air under the ridge is pushing over the foothills and urban corridor. Storms over the far eastern plains may last into the night, especially over the far northeastern corner as the low lifts slightly north. Monday will bring warmer temperatures as the upper ridge re- establishes itself behind the departing upper low.
VFR conditions will be present through the TAF period as high pressure moves over the area. showers and thunderstorms are possible in the higher elevations.
1150 PM EDT Sun Jul 16 2017 Varying cloud layers exist within NNE flow in wake of earlier cold front. The lowest ceilings, enhanced some by Lake Huron, range near 1500 feet. Cold front now in process of slipping south of the border, with surface riding and lower dew pts (note 50s in northern lower Michigan) working in for the early evening hours, ending any thunderstorm chances. Good start to the work week weatherwise, as large upper level ridge centered over the Central Plains tracks East. The associated ridge axis will fold over Lower Michigan Monday Night. Weak wind field around on Monday, along with some diurnal flat cu, but should see highs predominatly in the upper 70s to around 80 with 850 mb temps around 12 C, slightly cooler northern Thumb region with onshore northeast flow.
1101 PM EDT Sun Jul 16 2017 Late evening surface analysis depicts the axis of Atlantic ridging extending across central Florida, with a stationary frontal boundary oriented in an east to west fashion across the southern Appalachians. We expect fair skies to prevail by the predawn hours, with a low level southwesterly flow keeping dewpoints and thus low temperatures generally in the low to mid 70s, except upper 70s in coastal locations. The axis of Atlantic surface ridging will remain positioned just south of the northeast Florida coastal waters through midweek, while a weakening low level trough sinks southward towards the Georgia coastal waters by midweek.
1015 PM EDT Sun Jul 16 2017 A weak cold front will gradually dissipate overnight into Monday.
1203 AM EDT Mon Jul 17 2017 A weak cold front will stall over northern New England tonight and will lift back to the north on Monday.
440 PM PDT Sun Jul 16 2017 Breezy winds will subside after sunset leading to a cooler than average night tonight.
657 PM CDT Sun Jul 16 2017 A closed upper low was analyzed in east central Colorado at 20z. A closed low center over the CO-NE-KS border will lift slowly into southwest Nebraska overnight. On Monday, this closed low will be the main weather feature, with abundant moisture and chances for precipitation up to 50 percent from southwest into central Nebraska thorough the day. To the west and north, highs will reach the low to mid 90s. The closed low will become an open wave as it moves into eastern Nebraska overnight.
1144 PM CDT Sun Jul 16 2017 A closed upper low was analyzed in east central Colorado at 20z. A closed low center over the CO-NE-KS border will lift slowly into southwest Nebraska overnight. On Monday, this closed low will be the main weather feature, with abundant moisture and chances for precipitation up to 50 percent from southwest into central Nebraska thorough the day. To the west and north, highs will reach the low to mid 90s. The closed low will become an open wave as it moves into eastern Nebraska overnight.
612 PM MDT Sun Jul 16 2017 High pressure centered over NV will begin to elongate across the Four Corners over the next 24 hours. The center of high pressure becomes a little more round and organized midweek and begins to shift eastward thanks to an oncoming closed low into the Pacific NW.
1058 PM EDT Sun Jul 16 2017 As high pressure drifts east, an approaching frontal system will bring a return to more humid weather with a chance for showers and thunderstorms tonight and Monday.
1036 PM EDT Sun Jul 16 2017 Currently - A rather flat pressure pattern is in place across the local area, with the western end of an Atlantic ridge blunted by Florida and a weak low level cyclonic area washing out over South Florida. On this date, back in the year 1888, the low temperature in Key West was 68 degrees. This holds the daily record low temperature for July 17th, and also stands as the lowest temperature ever recorded during the month of July.
A deep trough digs into the area on Monday with an upper low centered north of New York state. An upper ridge starts to build in from the west but doesn't strengthen enough by Monday to push the upper low through. Lows will be in the lower 70s.
1031 PM EDT Sun Jul 16 2017 A weak cold front will stall over northern New England tonight and will lift back to the north on Monday.
946 PM CDT Sun Jul 16 2017 Competing forces right now between the low level jet and a cooling boundary layer over north central ND continues to see pulse thunderstorms approaching marginal severe thresholds. Over southwestern North Dakota, very high pressure rises in the wake of showers/storms has generated peak wind gusts of 45 to 55 MPH at both Baker and Glendive. The latest surface analysis shows a surface warm front through western ND, with an advancing cold front into central MT moving east with time. In between, an 850mb thermal ridge with increasing temperatures and instability. This lines up along and ahead of the advancing aforementioned cold front as it shifts through western into central ND overnight. The cold front limps from south central ND early Monday morning into the southern James River Valley Monday afternoon.
1027 PM EDT Sun Jul 16 2017 A cold front just north of Lake Erie will continue to move slowly south and is expected to cross the local area overnight and early Monday.
Am expecting redevelopment overnight across the far eastern CWA due to another vort max rotating around the inverted mid level trough. The inverted trough/upper level weakness over the region will gradually shift westward into northeast Mexico through the period. Monday will be a few degrees cooler with more cloud cover and rain expected, but still bring highs in the 90s across the region.
Rain chances lower into the coming week, temperatures warm, as the upper high pressure ridge builds into the region.
815 PM EDT Sun Jul 16 2017 A cold front dropping south through the Great Lakes will bring a slight chance of showers and thunderstorms to the region tonight into the early part of the the work week. Scattered convection has developed in an axis of moisture convergence along a cold front and moved into west central Ohio. By Monday morning the upper s/w will be east of the region, but a sfc trof will be lingering across the ern zones. A few storms could linger into the evening hours, but overall expect Monday night be dry, with lows in the lower to mid 60s.
1044 PM CDT Sun Jul 16 2017 Weak cold front has slipped south through most of the forecast area this evening, accompanied by scattered thunderstorms in many areas. Slightly cooler & less humid air is filtering in behind the front. Cold front is dropping southward early this afternoon and has recently cleared Galesburg and Peoria. With freezing levels above 14kft, large hail may have a hard time making it to the surface, but some storms may pulse up enough for some brief hail/wind threats. High pressure will move across the Midwest on Monday, with a brief period of less humid air to enjoy, before the heat wave arrives.
A weak cold front was able to kick off some isolated showers and thunderstorms over extreme southern Middle Tennessee this afternoon. At 2 pm, temperatures were in the lower 80s along the Cumberland Plateau, with mainly middle and upper 80s elsewhere.
Cirrus clouds continue to stream overhead in northeast flow aloft between the northeast Pacific ridge and the broad upper trough to our east.
315 PM MDT Tue Apr 25 2017 Current surface analysis shows low pressure over southeast WY, with frontal boundary south and west of the forecast area. Upper level analysis shows low pressure over the Black Hills, starting to move eastward. Large trough covers the western half of the US. Skies will become partly cloudy with high temperatures in the 40s, some upper 30s across the higher Black Hills.
249 PM EDT Tue Apr 25 2017 Surface analysis reveals region being influenced by two separate areas of low pressure, with one over the Carolinas and another over parts of the southern Plains. A line of strong to severe thunderstorms will fire off ahead of a cold front in MO/IL/AR Wednesday afternoon and evening and make its way toward our region.
314 PM EDT Tue Apr 25 2017 Low pressure will approach from the south tonight and Wednesday.
310 PM MDT Tue Apr 25 2017 Current LAPS surface analysis shows a cold front sliding southward into Colorado this afternoon with a band of convection just along the boundary. Temperatures will not rebound all that much as another round of convection is expected in the afternoon once the ridge axis moves into the plains.
Cold front continues to be similarly progged by the models to rapidly advance across the forecast area mainly during the evening hours Wednesday.
After Wednesday, the weather pattern will change drastically as an upper level ridge builds over the Pacific Ocean. The result will be much drier and warmer conditions compared to the current weather pattern. Rain will pick up in intensity and become more widespread over the area during the overnight hours as a trailing cold front moves through. In the meantime, heights will begin to rise as an upper level ridge builds off the coast of California. This ridge will be responsible for the drastic change in the weather expected for the remainder of the week and into the weekend.
Otherwise, as cold front pushes toward the region tonight, increasing low level moisture will result in lowering ceilings, with widespread mvfr to ifr conditions possible. likely organizing into a linear MCS by late afternoon and through the evening hrs as the upper level trough axis approaches and becomes negatively tilted. organized storms will be seen as the increased forcing approaches from the approaching negatively tilted trough.
Collaborated with WPC and surrounding offices, and the overall assessment is that the NAM12 holds merit with regards to large scale forcing/ascent, but mesoscale processes associated with the high qpf/snowfall has enough uncertainty at this time to question its validity. Latest suite of satellite imagery shows a mid/upper level closed low circulating over eastern Wyoming.
This will be the story this afternoon, and given the lower temps on the high terrain did bump those down based on the short term blended data. Surface analysis shows low pressure still resides off the Carolina Coast line and we remain in the east to northeast flow at the surface. Showers should wind down by mid day as the mid level ridge works towards the region. As the ridging spreads in the clouds should gradually thin and diminish through the day. The central CONUS will be under the influence of a trough, with several short waves to translate across the Mississippi Valley.
A warm front will quickly return north thu night and early fri, with very steep lapse rates albeit a weak mid lvl capping.
239 PM EDT Tue Apr 25 2017 Building high pressure will return dry, and very warm weather to the Upper Ohio Region for Wednesday. Upper level low pressure will continue to slowly trundle up the East Coast tonight with increasing subsidence on the western flank suppressing residual rainfall. Insolation with rising heights/warm advection in response to a deepening plains trough will maintain dry weather for Wednesday, and drive temperature well above the averages.
Despite high clouds streaming over the region, westerly winds have increased early this afternoon over the High Wind Warning and Wind Advisory areas. The westerly downslope flow is warming temperatures near forecast highs for this afternoon, so will raise high temperatures over the Permian basin, south through the Lower Trans Pecos. West winds of 20-35kt sustained, and gusts of 35- 50kt will occur this afternoon, but diminish this evening and become northwesterly ahead of a cold front.
336 PM EDT Tue Apr 25 2017 Cloudy, cool, and wet conditions are expected through Wednesday as low pressure slowly moves north along the coast.