Aikyam-Lab/Synoptic-Bench huggingface dataset:
248 AM CDT Tue Mar 28 2017 Low stratus was in place over the Ozarks this morning as an upper level ridge moves over the Ozarks. The ridge will bring a dry day to the area with temperatures rising into the middle 60s for most of the region with near 70 degrees in extreme southwestern parts of the area. Despite the ridge over the area, cloud cover will be stubborn with only a few peeks of sun expected. The ridge will begin to shift east this evening and overnight as a strong storms system moves out of the four corners region and takes a similar track as this past weekends system.
522 AM EDT Tue Mar 28 2017 An area of low pressure will move along or just south of the Mason-Dixon line late tonight and Tuesday.
325 AM EDT Tue Mar 28 2017 Showers will plague the Upper Ohio Region today with crossing low pressure. Low pressure is progged to track across the Upper Ohio/Mid Atlantic Regions today. Showers will thus persist until the exiting system pulls a cold front across the area during the afternoon and early eve. As high pressure moves over the Great Lakes, cooler and drier air will filter over the region.
343 AM EDT Tue Mar 28 2017 A cold front will cross the area this afternoon.
154 AM EDT Tue Mar 28 2017 Low pressure will move up the Ohio Valley tonight. High pressure will build in for the middle of the week.
A pre-frontal trough/convective line has developed just east of the MS river and is also moving eastward. In addition, the hi-res models bring in another round of storms overnight, mostly associated with the cold front. As upper ridging builds in on Wednesday a warm and generally drier day can be expected.
345 AM EDT Tue Mar 28 2017 Low pressure moves away today, with lingering NW flow showers.
404 AM CDT Tue Mar 28 2017 Dense fog developed quickly early this morning across Northeast Arkansas, the Missouri Bootheel, and West Tennessee as some clearing took place behind the cold front. The cold front will stall out this morning over Central Mississippi. The front will begin lifting back northward as a warm front tonight. On Wednesday, winds will turn around to the south behind the warm front. As the storms push into Eastern Arkansas Wednesday evening, the low-level jet is expected to strengthen helping maintain strength of the storms.
247 AM EDT Tue Mar 28 2017 A series of troughs moving through the area today will trigger some showers and possibly a few thunderstorms. A cold front will move through the area tonight.
326 AM EDT Tue Mar 28 2017 Weak low pressure will move across the Middle Atlantic region today and then offshore tonight.
These storms are courtesy of a low pressure system moving northeast through southern IN/northern KY. 1000-2000 j/kg of CAPE has developed south of the warm front which was over southern IN as of 315pm EDT.
Cold front now pushing into central sections of the state is expected to stall across southern sections late tonight.
To the north, a ridge across the Canadian Prairie this afternoon will move eastward through Tuesday, leading to an area of high pressure building across northern Manitoba. Highs slightly warmer than today in the 50s to near 60, except inland areas of Cook county where the snow pack may keep highs limited to the 40s. East winds off Lake Superior may also result in cooler temperatures by the lake.
652 AM EDT Tue Mar 28 2017 Low pressure moving through the Ohio Valley this morning will offering a continued chance of showers. High pressure will build in for the middle of the week, providing dry weather.
405 AM CDT Tue Mar 28 2017 A quiet overnight period with high pressure over the region.
/issued 845 PM EDT Mon Mar 27 2017/ Dry and stable conditions courtesy of high pressure from the Atlantic extending southwest across the central Florida peninsula lead to a warm and dry day across the entire forecast area with temperatures in the lower to mid 80s. Little change is expected during the next few days as high pressure sinks south across the region with warm and dry conditions continuing. High pressure will provide tranquil boating conditions over the Gulf waters the few days with light east to southeast winds overnight and during the morning hours with a weak pressure pattern favoring an onshore sea breeze component developing along the coast each afternoon.
600 AM EDT Tue Mar 28 2017 Low pressure crosses and then moves away today, with lingering NW flow showers.
On Wednesday night, the trough of low pressure will begin to dig further south and a stronger surge of moisture will move into central Idaho and parts of west central Montana.
Ridging will keep the area mostly dry today, but the next system will arrive tonight. Showers are expected to move into the coast this evening then spread inland to the Cascades overnight as a weak warm front slides by overhead. The cold front and the main shot of precipitation will arrive Wednesday morning.
320 AM CDT Tue Mar 28 2017 As the low pressure area that brought rain to the CWA yesterday moves off to the east, a brief period of dry weather is expected as a high pressure ridge slides across the area today through tonight. Temperatures through the period will average a little warmer than normal, with the warmest readings expected ahead of each system to impact the area. Quiet conditions will persist into early Wednesday as upper/surface ridging slowly drift east of the area. Then, increasing WAA/isentropic ascent ahead of a slow moving upper low/trof (currently pushing into the Four Corners region) will return the threat of showers to the area.
605 AM EDT Tue Mar 28 2017 An area of low pressure will move along the Mason-Dixon line through tonight.
At the surface, a weakening area of low pressure will move northeastward through the mid-Mississippi Valley region, and a broad area of high pressure will remain in place to our east. A weak cold front north of the CWA will allow for a few showers and thunderstorms on Tuesday mainly across the western portions of the CWA. As this occurs, upper level ridging builds in and persists into Wednesday, helping to minimize convection in the short term. Above average highs in the low to mid 80s will increase into the mid to upper 80s Wednesday as the upper ridge builds in. The high at TLH on Wednesday will be around 3 degrees below the record high.
Very unstable conditions have developed over central Alabama this afternoon as surface temperatures have warmed into the upper 70s to lower 80s, with cold air advection aloft as the upper trof axis approaches from the west. An upper low centered over eastern Missouri will track eastward overnight and push a trof axis into north Alabama. Forcing ahead of trof axis will help maintain convection development throughout the night despite loss of daytime heating. The upper trof axis will become aligned in an east to west direction across central Alabama on Tuesday. Weak forcing along the trof axis will produce scattered showers and thunderstorms, mainly during the heating of the day.
Early this morning a warm front extended from West Central Texas through East Texas and an upper level low was digging through Arizona. Storms may initiate mid to late afternoon across the far northwest Hill Country and farther north through West Central Texas up into the Red River in the low level theta-e ridge and near the dry line advancing east. The main opportunity for storms farther south across the CWA will come tonight into Wednesday morning as the Pacific front and upper level low advance east. With steep mid level lapse rates with the approach of the upper trough MUCAPE values of nearly 3000 j/kg and deep layer shear of over 50 kts are forecast across far western areas of the CWA with a highly diffluent flow aloft.
The trough slides quickly to the east this evening replaced briefly by upper level ridging Tuesday. By Wednesday a stronger upper level low and associated cold front approaches the area.
1124 PM MDT Mon Mar 27 2017 An upper level trough continues to dig over the Great Basin this afternoon. Cloud cover has also helped to keep instability down as well, with afternoon and evening thunder appearing less likely ahead of the approaching trough. Impacts to travel will be greatest overnight and through the morning hours on Tuesday for those travelling over the higher passes. The cutoff low pressure system will drift east through the morning hours Wednesday with 500mb heights slowly rising as the day progresses. morning a transitory ridge moves over the area. In the GFS the ridge is well east of the area by late afternoon with increasing SW flow aloft ahead of the next Pacific system that will be moving through the Great Basin.
1048 PM CDT WED AUG 31 2016 Afternoon has quieted down with dissipation of earlier area of showers and thunderstorms into the mid James valley, and high pressure axis stretched fairly near the I-29 corridor. Upper-level ridge will continue to take stronger hold on weather for tonight. Different for tonight will be our location somewhat closer to center of mid to upper level ridge, suggesting less potential for any storms to drift southward into the CWA. High pressure shifting eastward Thursday will allow increase in southerly gradient, with winds west of the James River reaching a bit gusty levels of 15 to 25 mph during the afternoon. While the flow around exiting ridge could bring another couple degrees cooling into areas near/east of the James, should be fairly close to today for south central SD.
/issued 957 PM CDT WED AUG 31 2016/ Skies have gone mostly clear this evening except for our far NW zones where cirrus is starting to work southward well ahead of a cold front entering the southern Plains.
18Z surface data has high pressure from the upper Midwest into the Plains. The main cold front ran from the eastern Great Lakes into the central Plains. Quiet and increasingly pleasant conditions will be seen from late this afternoon through Thursday as high pressure moves into the Great Lakes.
The actual cold front is still in Kansas and Missouri this evening but will continue moving south overnight.
Guidance continues to converge on now Tropical Storm Hermine moving northward and transitioning to the northeast tonight into Thursday as the upper ridge is expected to break down allowing the weak gradients to allow Hermine to be pulled toward the gulf coast.
1155 PM EDT WED AUG 31 2016 Northerly flow will continue into Thursday on leading edge of high pressure. Cold front currently across far se corner of state slowly pushing southward. Dewpoints ahead of the front in the low 70s lead to afternoon cape values 1-1. Behind the front cooler and drier air is filtering with back edge of post frontal clouds now along the I-69 corridor.
mainly in the Delta and over ridgetops. Large upper low off the B. coast with associated trough extending along the West Coast will persist through the remainder of the week.
912 PM EDT Wed Aug 31 2016 A cold front will cross the region on Thursday.
The tropical cyclone is moving north-northeastward toward a likely landfall location somewhere along Florida's Nature or Forgotten Coasts. A Small Craft Advisory remains in effect for the extreme southeastern Gulf of Mexico beyond five fathoms, and Hawk Channel and the lower Straits of Florida, west of the Seven Mile Bridge.
806 PM EDT WED AUG 31 2016 Main band of showers and storms continues to propagate mainly along of and north of the Interstate 64 corridor, in closer proximity to an approaching cold front currently pushing onshore of the Great Lakes and extending southwest roughly in line with Interstate 80. This trough axis has interacted with diurnal heating to form scattered showers and convection, mainly north of the Mountain Parkway. The cold front is progged to make a southward push through Eastern Kentucky tonight before exiting to our south tomorrow afternoon. This will keep isolated to scattered showers and thunderstorms in the forecast through tomorrow morning, with some showers lingering along the high terrain through tomorrow afternoon. The winds will turn more northerly tonight and help usher in cooler, drier air behind the frontal passage.
950 PM EDT WED AUG 31 2016 A cold front will slowly move southeast off the Downeast coast overnight.
Quiet wx conditions should then prevail heading into the overnight hrs, as early morning lows fall into the lower 70s for most locations. Cold front positioned well n of the cntrl TN Valley over the Midwest states into the OH Valley region will continue to dive swd going into the daytime hrs Thu, with iso/sct showers/tstms developing along/just ahead of the approaching sfc boundary. VFR conds should otherwise prevail well into the daytime hrs Thu, as mid/high clouds remain in place over the region in advance of an oncoming cold front out of the n. Afternoon high temperatures thus far have warmed into the lower 90s most spots, with light and variable winds.
This trough is predicted to lift northward overnight and this is where we have seen fairly persistent shower and embedded isolated storms with periods of heavy rain.
This evening a cold front was positioned from Central Kansas through Missouri and the Ohio River Valley into the Northeast States to a low pressure system centered over Eastern Canada. the cold front is expected to continue to sag southward toward the CWA.
604 PM CDT WED AUG 31 2016 Some isolated to scattered SHRA/TSRA have developed across portions of central and NRN AR late this afternoon in response to a cold front starting to drop south into the state.
1243 AM EDT THU SEP 1 2016 A strong high pressure system centered over Manitoba will move slowly southeast providing fair weather across our area through the Labor Day weekend. Lows tonight will be in the upper 50s and lower 60s, with highs on Thursday in the lower to middle 70s. Strong cold front was working steadily SE across the forecast area with a broken line of showers and a occasional lightning strike. High pressure will dominate conditions across the region with any major upstream changes hampered initially by remnants of "Hermine" that will likely be raising havoc along the East coast.
A persistent upper level trough along the West Coast will bring a cooling trend for the remainder of the week, and increase the depth of the marine layer.
641 PM CDT WED AUG 31 2016 207 PM CDT Northerly winds today in the wake of this mornings cold frontal passage, have resulted in a transition to a cooler and drier air mass from north to south. As this cooler air mass shifts over the warm Lake Michigan waters, this will likely result in some lake effect cloud cover on Thursday. Otherwise, expect temperatures to be cooler in the low to mid 70s in most areas. KJB 303 PM CDT The longer term forecast period will start out with a continuation of quiet weather as high pressure slowly spreads to the upper Great Lakes with a ridge axis extending southwest through the middle and upper Mississippi Valley. The quiet weather will persist through the weekend, with temperatures starting out below seasonal normal levels, with lows in the lower to middle 50s.
802 PM EDT WED AUG 31 2016 A cold front will move south of the Ohio River by Thursday morning. High pressure and a dry airmass will then build in through the weekend.
Speaking of Hermine, the latest from the NHC still has the cyclone slowly gaining strength over the next 24 hours as it tracks northeast, making landfall along the central or eastern Panhandle of Florida late tomorrow night. Patchy MVFR conditions due to light fog cannot be ruled out in any areas around daybreak Thursday, although the highest chance of impact is at GLH. Isolated showers and storms late this afternoon are expected to end after sunset, with overnight lows in the low to mid 70s.
947 PM EDT WED AUG 31 2016 High pressure continues to build into the Western Great Lakes region late this evening. Upper level trough is still upstream of Michigan over Lake Superior. Expect generally partly cloudy skies and cool conditions as temps fall into the lower to mid 50s for overnight lows. On the latest surface weather map of interest, 1028 mb high pressure was centered over northern Manitoba. It will be seasonably cool with lows tonight in the lower and middle 50s with highs Thursday in the upper 60s to around 70. High pressure starts off Thu evening over far northern Ontario and Hudson Bay.
957 PM CDT WED AUG 31 2016 Skies have gone mostly clear this evening except for our far NW zones where cirrus is starting to work southward well ahead of a cold front entering the southern Plains.
748 PM EDT Wed Aug 31 2016 A cold front with scattered showers and thunderstorms will pass through the region tonight ushering in cooler and mainly dry weather for Thursday onward into the first half of the upcoming weekend.
activity that may develop along and ahead of an approaching cold front dropping south across MO. Some isolated to scattered SHRA/TSRA have developed across portions of central and NRN AR late this afternoon in response to a cold front starting to drop south into the state.
The main story in the short term is the arrival of cooler and less humid air. The cooler air mass is arriving in a rather unconventional way, without any easily identifiable cold front. Highs will generally be in the lower 80s Thursday, with lows Thursday night around 60.
701 PM EDT WED AUG 31 2016 Northerly flow will continue overnight into Thursday on leading edge of building high pressure. Cold front currently across far se corner of state slowly pushing southward. Dewpoints ahead of the front in the low 70s lead to afternoon cape values 1-1. Behind the front cooler and drier air is filtering with back edge of post frontal clouds now along the I-69 corridor.
1040 PM EDT Wed Aug 31 2016 A cold front with scattered showers and thunderstorms will pass through the region tonight ushering in cooler and mainly dry weather for Thursday onward into the first half of the upcoming weekend.
1043 PM EDT WED AUG 31 2016 A cold front will push southeast across the commonwealth overnight into early Thursday, bringing a chance of showers.
Lee trof through MT-WY with tight pressure gradient over northeastern WY keeping gusty winds over the area, although winds have decreased over western SD. This Evening Through Thursday Night Upper level analysis has amplified flow with large ridge across the central CONUS and trof across the west coast. At the surface, high pressure is located across Minnesota with low pressure developing across central Montana. Upper ridge axis will cross the Northern Plains with very warm and dry conditions continuing.
1111 PM CDT WED AUG 31 2016 Band of showers and thunderstorms will continue to move southeast late this afternoon and will be south of the CWA by early this evening as low level winds begin to advect cooler and drier air into the area. Some diurnal cumulus is expect to develop over the northeast half of the CWA by afternoon as a weak mid level trough passes through the area. Expect highs tomorrow to be closer to warmer NAM MOS guidance which has values closer to 80 degrees in most areas. Carney High pressure remains in control of the weather through the weekend.
A trough and associated cool front moved through southwest Washington and northwest Oregon earlier this evening, bringing showers to much of the area.
Earlier convection has dissipated, although with the cold front coming down later tonight, will leave in isolated POP's the rest of the night. With the approach of a cold front tonight, flight categories will begin falling after 09Z.
744 PM EDT WED AUG 31 2016 A strong high pressure system centered over Manitoba will move slowly southeast providing fair weather across our area through the Labor Day weekend. Lows tonight will be in the upper 50s and lower 60s, with highs on Thursday in the lower to middle 70s. Strong cold front was working steadily SE across the forecast area with a broken line of showers and a occasional lightning strike. High pressure will dominate conditions across the region with any major upstream changes hampered initially by remnants of "Hermine" that will likely be raising havoc along the East coast.
1016 PM EDT WED AUG 31 2016 A cold front will push southeast across the commonwealth overnight into early Thursday, bringing a chance of showers.
This Evening Through Thursday Night Upper level analysis has amplified flow with large ridge across the central CONUS and trof across the west coast. At the surface, high pressure is located across Minnesota with low pressure developing across central Montana. Upper ridge axis will cross the Northern Plains with very warm and dry conditions continuing.
633 PM CDT WED AUG 31 2016 Afternoon has quieted down with dissipation of earlier area of showers and thunderstorms into the mid James valley, and high pressure axis stretched fairly near the I-29 corridor. Upper-level ridge will continue to take stronger hold on weather for tonight. Different for tonight will be our location somewhat closer to center of mid to upper level ridge, suggesting less potential for any storms to drift southward into the CWA. High pressure shifting eastward Thursday will allow increase in southerly gradient, with winds west of the James River reaching a bit gusty levels of 15 to 25 mph during the afternoon. While the flow around exiting ridge could bring another couple degrees cooling into areas near/east of the James, should be fairly close to today for south central SD.
A cold front will cross the area tomorrow, but only scattered showers and storms are expected with it, with TRI having the best chances.
The inverted trough that helped our storms today will lift northward as it's drawn into the flow ahead of the large scale regional trough approaching from the northwest.
The region will remain between low pressure over the eastern Gulf of Mexico associated with Tropical Storm Hermine and High pressure to the north and west of the region. Lower rain chances will continue for the next few days as a combination of deepening east coast trof and circulation around TS Hermine bring dry continental air to the region into early part of this weekend.
1158 PM EDT WED AUG 31 2016 Aviation Much cooler and less humid weather can be expected leading into the upcoming holiday weekend.
1147 PM CDT WED AUG 31 2016 Backdoor cold front that has gradually pushed SW across the forecast area earlier today, has led to diminishing shower trends across most of the forecast area this evening. Already seeing signs of this drier air across NW MO where surface dewpoints falling into the low 60s. 0 inches) continues along and south of this shear axis, which will be shunted very slowly southward Tonight, as upper troughing digs into the Upper Mississippi Valley/Great Lakes.
/issued 342 PM CDT WED AUG 31 2016/ (Tonight and Thursday) Showers and a few storms have developed this afternoon as moist and unstable airmass remains over the area at lower levels despite the ridge aloft. Low level moisture remains high with overnight lows generally in the lower 70s.
This will provide quiet weather, and cooler/less humid conditions than we have seen lately. East/northeast flow into our area will keep a drier air flow into our area, with the high slow to depart as Tropical Storm Hermine or its remnants track up the southeast U. A gradual warmer and more humid trend will set up during the second half of the weekend, as a prominent upper trough digs along the West Coast this weekend due to this system.
715 PM EDT WED AUG 31 2016 Aviation Much cooler and less humid weather can be expected leading into the upcoming holiday weekend.
618 PM CDT WED AUG 31 2016 At 2 PM, a short wave trough was moving southeast Minnesota and central Wisconsin. Temperatures were in the lower 70s north of Interstate 94 and and in the mid and upper 70s across the remainder of the Upper Mississippi River Valley.
Earlier convection has dissipated, although with the cold front coming down later tonight, will leave in isolated POP's the rest of the night. With the approach of a cold front tonight, flight categories will begin falling after 07Z.