Aikyam-Lab/Synoptic-Bench huggingface dataset:
1035 PM MDT SAT OCT 1 2016 A large Pacific low pressure trough off of the Pacific Northwest coast will move inland and eventually across western and central Wyoming bringing increased clouds and showers with isolated afternoon and evening thunderstorms.
Upper ridge moving across Rockies tonight to be over Texas tomorrow and. this will equate to sunnier Sunday skies and slightly warmer afternoon temperatures in the average middle 80s.
726 PM EDT Sat Oct 1 2016 WV imagery and RAP analysis indicated a mid/upper level low over northeast Indiana and a ridge from the nrn plains to north of Lake Superior. At the surface, light northeast winds prevailed between a ridge over nrn Ontario and low pres over the s end of Lake Michigan. Otherwise, thicker mid clouds will keep min temps from the mid 40s to the lower 50s central and east. No precip expected Sun night into Tue as high pressure ridging is in control. Could see fog Sun night as ridge is overhead, then again Mon night (especially over the southeastern CWA) as SE flow increase. Conditions at KSAW and KIWD to improve to VFR during the late morning hours as a ridge builds into the area from the west.
/issued 259 PM CDT SAT OCT 1 2016/ Upper low continues to churn over the upper Midwest region, which continues to keep our upper flow pattern nwly. Upper ridge to our sw has brought us a good deal of mid and high lvl clouds today, but drier air over W TX will work its way ewd overnight leaving us under partly cloudy skies. One more weak reinforcing shot of cooler air looks to come early Sunday, which will allow for one more night in the 50s before we warm up ahead of our late-week cold front. Low level flow will increase by midweek, as the upper trof currently over the Pac NW moves into the plains. Ewd progression of the trof looks to be slow through the work week, as models have trended slower with each run.
349 PM CDT SAT OCT 1 2016 Upper low over northern Indiana this afternoon with upper ridging over the Rockies. Weak upper trofs over the central Gulf of Mexico and central Texas. At the surface, high pressure is centered south of Memphis, with a stationary frontal boundary over the Gulf of Mexico about 80 miles south of the Louisiana coast. Scattered clouds across the area with temperatures generally in the lower to middle 80s and dew points in the 50s. Trof over Texas will move eastward over the next 24 hours.
A weak short wave rotating around a large upper level low over the great lakes will bring mid and high level clouds across the forecast area into Sunday afternoon. High pressure at the surface, however, will keep low level moisture scarce, and therefore, mainly VFR conditions.
Low amplitude ridging was present across the intermountain west and high plains of eastern Wyoming, eastern Montana and the western Dakotas. West of this ridge, a closed low was located west of British Columbia with a trough extending south to off the coast of northern California. At the surface, high pressure was anchored across the mid Missouri river valley while a trough of low pressure was present from eastern Montana into northern Colorado. Upeer level low will continue to rotate over the Ohio Rvr valley over the next 24 hours with weak ridging across the western plains. Thermal ridge builds a little more across the Rockies with 850 mb temps to rise a degree or two C from this afternoon to tomorrow across the high plains.
347 PM MDT SAT OCT 1 2016 A strong cyclone over the mid-west and a downstream Bermuda high will continue to create a blocky pattern going into the early week period. As such the upstream cyclone off the central NOAM left coastline will be forced to dig into the northern Great Basin during the same time frame. Gusty winds will be more of a threat than precipitation in the lower elevations. High temperatures should be a degree or two warmer. The subtropical jet will be forced over our CWA tomorrow night as a branch of the stronger polar jet dives into the base of the low.
313 PM CDT Sat Oct 1 2016 Ridge of high pressure extending southwest through southwest Minnesota into northeast Nebraska keeping winds down along and east of that line. The ridge axis will shift a bit farther east tomorrow with areas along and west of Interstate 29 likely seeing southeast winds of 10 to 20 mph.
The low pressure system over the Ohio River Valley has finally begun to move to the northeast; however, the cloud cover the system brought into the area today will stick around for much of Sunday. In addition, a weak trough associated with the departing low will move south through the far eastern section of the CWA, creating a slight chance for light rain showers during the afternoon hours Sunday.
The cold front that moved through north-central Idaho and western Montana this morning, has moved east over the Continental Divide. Due to a cooler airmass over the region and clear skies, widespread frost will be possible in many valleys of western Montana.
Southwest flow aloft strengthens somewhat as the impressive upper trough approaches from the Great Basin states. Expect scattered showers and thunderstorms to erupt in the evening mainly along and east of I-25 near the 700 mb theta-e ridge axis aided by diffluent flow aloft as the capping inversion is overcome.
1009 PM EDT Sat Oct 1 2016 Low pressure will track southeast of the Gulf of Maine tonight into Sunday.
The boundary should advance slowly northward through the overnight as weak high pressure noses into the area from the east. A more persistent onshore flow is expected near the coast as the atlc ridge builds back in. This should keep min temps in the mid 70s at the coast, otherwise temps bottom out in the low 70s. (from previous) Zonal jet over central/eastern Canada will drag an H100- H70 blocking ridge into the NW Atlc on Sunday.
553 PM CDT SAT OCT 1 2016 Upper low finally lifting out to the north northeast, in northern Indiana as of 19z. However, models showing a weak trof/cold front to slide through forecast area on backside of system.
Upper closed low that has been providing showers and cloud cover over the past few days continues to impact the region.
Update A cold front continues to move across eastern Montana this evening. Proton Previous Discussion Moist upper level southwest flow aloft has set up across the region as a Pacific trough deepens and translates east.
603 PM CDT SAT OCT 1 2016 Upper low inching its way northward toward the northeast tip of Indiana this afternoon. Will have to monitor closely to see if dense fog will form, as indicated by some of the higher resolution model guidance. Upper low will track into southern Ontario Sunday morning, pulling most of the showers with it. Most of the afternoon model guidance is showing some isolated showers across southern Illinois, associated with a weak trough trailing the low. The upper level ridge behind our departing cut-off low will start to move overhead Sunday night bringing quite calm winds and potential for fog development as moisture remains trapped below weak subsidence aloft.
747 PM EDT Sat Oct 1 2016 High impact weather potential: None Upper low forecast to lift into MI and then slowly drift east Sunday. Until then moisture rotating around the low will keep skies cloudy and at least the threat for showers around through Sunday. This afternoon and tonight vorticity and isentropic lift increases ahead of the upper low then quickly decreases after daybreak Sunday. Sunday the low moves away.
/issued 226 PM CDT SAT OCT 1 2016/ Currently the upper level low that has been affecting the Midsouth the past few days has drifted north from the Ohio River to near Fort Wayne Indiana. Temperatures this hour range from the upper 60s to the low 80s as you bisect the CWA from northeast to southwest.
1232 AM EDT Sun Oct 2 2016 Low pressure will track southeast of the Gulf of Maine tonight into Sunday.
339 PM CDT SAT OCT 1 2016 Manual analysis of 12z upper-air data indicates a deep-layer cyclone over Indiana with a weak ridge over the central CONUS being undercut by a low-latitude wave moving through the southern Plains. Farther west, mid-level height falls were occurring over the Pacific Northwest and Great Basin in advance of a trough moving onto the West Coast. In the low levels, moisture which has wrapped around the Ohio Valley cyclone has become trapped within the ridge axis over the mid Missouri Valley. There is some indication in model guidance that these low clouds may begin to recede tonight as the associated synoptic system accelerates northeast into the lower Great Lakes. Should this scenario unfold, areas of fog are likely to develop over far eastern Nebraska and western Iowa, in proximity to the low-level ridge axis.
A significant temperature gradient will be expected across the region this night, with readings into the upper 50s over inland SE GA where cooler and drier air is in place, and in the lower 70s along the NE FL coast.
613 PM CDT Sat Oct 1 2016 Ridge of high pressure extending southwest through southwest Minnesota into northeast Nebraska keeping winds down along and east of that line. The ridge axis will shift a bit farther east tomorrow with areas along and west of Interstate 29 likely seeing southeast winds of 10 to 20 mph.
A rather strong upper low located near 130W/46N will move south, then move inland Sunday morning. Also given the strong dynamics of this upper low and cool pool aloft (500mb temperatures between -25 and -28C), could not rule out a slight chance of thunderstorms over the marine waters and adjacent coast. The upper low and associated cool pool aloft will move overhead during the day Sunday and we'll continue to see showers in many locations and some could moderate to heavy. Weak ridging builds into the area Sunday night as the upper low exits the region and we should once again catch a relative break in the weather with showers generally on the decrease.
929 PM MDT Sat Oct 1 2016 Isolated showers and thunderstorms will linger behind a cold front that pushed through earlier this evening. A weather disturbance moving through SW flow aloft will continue moving NE across central Montana this evening with an associated cold front. A cold front will push though the area this evening bringing scattered showers and a few thunderstorms to north central and southwest Montana. Showers will return to southwest Montana Sunday morning and spread north through the day as a large upper level low pressure slowly moves into the Pacific Northwest.
Low temperature forecast looks pretty good with mins mainly in the lower to middle 50s most spots.
616 PM EDT Sat Oct 1 2016 Low pressure will track southeast of the Gulf of Maine tonight into Sunday.
425 PM EDT Sat Oct 1 2016 Low pressure will track southeast of the Gulf of Maine tonight into Sunday.
Mostly clear skies tonight as region remains underneath a dry slot ahead of the upper level low pressure system off the Pacific Northwest Coast. Winds associated with a cold frontal passage earlier today have diminished. Temperatures will be about 10 degrees cooler tonight than last night. Showers will develop early Sunday morning across South- Central Idaho and move northward as the upper level low begins to move inland.
838 PM MDT Sat Oct 1 2016 Upper level ridge over northern Plains continuing to shift eastward ahead of large upper low approaching Pacific NW coast. Surface trof extends from eastern MT-central WY and will move into western SD early Sunday morning. Surface trof/warm front slides east of the forecast area with a cold front remaining northwest of the area. Closed upper low moves ashore across the Pacific NW and digs into the Great Basin region Sunday night. Stronger southwest flow will push ridge east of the region late Sunday. Thermal ridge also begins to shift east of the area, with highs ranging from the lower 70s over northeast WY and the Black Hills to the mid 80s over portions of the SD plains.
Clear skies across the southeast counties have allowed temperatures to warm into the low to mid 80s there this afternoon, while temperatures remain in the low 70s in the far northwest forecast area due to thicker stratocumulus associated with the upper low. This vertically stacked upper low is currently spinning near the Indiana/Michigan border and will move northeastward into Ontario tonight and tomorrow. This high cloudiness, slightly higher dew points, and warmer low-levels will allow low temperatures to not be quite as cool as the last few nights. Tomorrow low-level thicknesses continue to increase under westerly flow, so despite passing high clouds expect highs to range from the low to mid 80s north to the mid to upper 80s southeast.
A weak short wave rotating around a large upper level low over the great lakes will continue to bring mid and high level clouds across the forecast area into early Sunday. High pressure at the surface, however, will keep low level moisture scarce, and therefore, mainly VFR conditions.
719 PM EDT Sat Oct 1 2016 Low pressure near Cape Cod will track to the northeast tonight while high pressure remains parked over western Maine.
1058 PM CDT Sat Oct 1 2016 Ridge of high pressure extending southwest through southwest Minnesota into northeast Nebraska keeping winds down along and east of that line. The ridge axis will shift a bit farther east tomorrow with areas along and west of Interstate 29 likely seeing southeast winds of 10 to 20 mph.
1050 PM CDT SAT OCT 1 2016 Upper low finally lifting out to the north northeast, in northern Indiana as of 19z. However, models showing a weak trof/cold front to slide through forecast area on backside of system.
236 PM MDT SAT OCT 1 2016 Latest upper air analysis shows an upper level ridge over the plains with a trough approaching the coast. For tonight and Sunday dry weather will continue as the ridge persists over the plains. High temperatures will be a few degrees warmer Sunday than today due to the increased warm air advection from the breezy low level jet mixing to the ground.
Quite a bit of moist air has rotated into the region in the circulation around the Upper Midwest low pressure system.
642 PM CDT SAT OCT 1 2016 Manual analysis of 12z upper-air data indicates a deep-layer cyclone over Indiana with a weak ridge over the central CONUS being undercut by a low-latitude wave moving through the southern Plains. Farther west, mid-level height falls were occurring over the Pacific Northwest and Great Basin in advance of a trough moving onto the West Coast. In the low levels, moisture which has wrapped around the Ohio Valley cyclone has become trapped within the ridge axis over the mid Missouri Valley. There is some indication in model guidance that these low clouds may begin to recede tonight as the associated synoptic system accelerates northeast into the lower Great Lakes. Should this scenario unfold, areas of fog are likely to develop over far eastern Nebraska and western Iowa, in proximity to the low-level ridge axis.
A low pressure system offshore will continue drifting southeast.
Just a hint of an upper level disturbance is aiding mid and high clouds spilling overtop of the broader ridge centered over north-central Mexico, and time height model forecast suggests the cloud decks will lower some. into altostratus territory overnight but well above VFR levels as the lower levels remain relatively dry. Low temperatures tonight will be in the 60s at most locations, expect for the low 70s near the coast.
324 PM MDT Sat Oct 1 2016 Upper level ridge will shift eastwrd across the forecast area through Sunday. These will likely continue into the evening but a couple should be able to spread off the higher terrain as we are now reaching convective temps on the plains. On Sunday, southwest flow aloft begins to increase on the back side of the upper level ridge.
1137 PM CDT Sat Oct 1 2016 Latest 19z surface analysis indicates low pressure over northern Indiana. 12z GFS/NAM suggest low level moisture below 850mb to wrap around the upper level closed low into much of the forecast area tonight. Surface/upper level ridge begins to build into the forecast area Sunday.
The closed upper low is centered over northeast Indiana this mid- afternoon and will continue to track northeast into tonight. Lightning in any shower activity this afternoon has been confined to near the low center. The stacked low pressure that has been so sluggish to move away from the region is centered over northern Indiana this afternoon. MTF 303 PM CDT Low pressure that has been anchored just south of the Great Lakes region the past several days will begin to move northeast over the eastern Great Lakes during Sunday.
The latest water vapor satellite imagery highlights the deformed, mid to upper level trough to our west. This system is clinging on to a meandering upper level cyclone across the Ohio River valley. These height falls should relink the long wave trough complex between the cutoff low and the Gulf of Mexico. At the surface, high pressure reaches southwest towards the Florida Peninsula, then becomes ill defined across the southeastern United States. Above that, the mid-upper level troughiness takes over, lending to southerlies.
619 PM CDT Sat Oct 1 2016 Latest 19z surface analysis indicates low pressure over northern Indiana. 12z GFS/NAM suggest low level moisture below 850mb to wrap around the upper level closed low into much of the forecast area tonight. Surface/upper level ridge begins to build into the forecast area Sunday.
421 PM EDT Sat Oct 1 2016 WV imagery and RAP analysis indicated a mid/upper level low over northeast Indiana and a ridge from the nrn plains to north of Lake Superior. At the surface, light northeast winds prevailed between a ridge over nrn Ontario and low pres over the s end of Lake Michigan. Otherwise, thicker mid clouds will keep min temps from the mid 40s to the lower 50s central and east. No precip expected Sun night into Tue as high pressure ridging is in control. Could see fog Sun night as ridge is overhead, then again Mon night (especially over the southeastern CWA) as SE flow increase. Expect VFR conditions through most of the period as mid clouds move across Upper Michigan to the north of low pressure south of the region.
308 PM CDT SAT OCT 1 2016 (Tonight and Sunday) Pleasant weather will continue across West Central Texas the next 24 hours as an upper level ridge of high pressure dominates. The ridge axis will be overhead on Sunday, so temperatures will be a bit warmer than today, with highs topping out in the middle 80s for most of the area.
Very slow moving closed stacked low was located over Indiana with cyclonic flow continuing into the CWA around the low. The cloud cover was keeping temperatures in the 60s across the northeast CWA, but has warmed into the low to mid 70s where the cloud cover is more scattered. Expecting lows in the low to mid 50s tonight. Upper low finally lifts out on Sunday, while the next low begins to push inland on the west coast.
1203 AM EDT Sun Oct 2 2016 Showers should continue to diminish in coverage overnight as low pressure lifts northeast out of the area. Drier conditions are expected Sunday as the low pressure system that has plagued the region continues to move away.
950 PM EDT Sat Oct 1 2016 Upper level low will maintain shower chances through Sunday before high pressure begins to build overhead for the start of the work week. Latest water vapor imagery shows the upper level low that has been the dominant feature for days now still nearly stationary centered over NE Indiana / NW Ohio but if model consensus is correct we should start to see the low start to shift NE by morning.
The closed upper low is centered over northeast Indiana this mid- afternoon and will continue to track northeast into tonight. Lightning in any shower activity this afternoon has been confined to near the low center. The stacked low pressure that has been so sluggish to move away from the region is centered over northern Indiana this afternoon.
309 PM CDT Sat Oct 1 2016 Latest 19z surface analysis indicates low pressure over northern Indiana. 12z GFS/NAM suggest low level moisture below 850mb to wrap around the upper level closed low into much of the forecast area tonight. Surface/upper level ridge begins to build into the forecast area Sunday.
Medium Still may be a lingering vort lobe in the morning to hang onto small pops early in the eastern CWA but all in all the low will be moving further away from the area with only a weakly mid level cyclonic flow noted into the afternoon. Expect the clouds to be quite stubborn as low level thermal trough remains with sfc/850 troughing still hanging around.
18z sfc analysis shows low pressure still holding over the Ohio Valley beneath a gradually exiting upper low. Temperatures have made it into the mid to upper 60s through the area while dewpoints are generally in the low to mid 50s with light/variable winds. They all slowly take the deep closed low north from the Ohio Valley and into the eastern Great Lakes on Sunday. At this point, the model spread increases a bit as the CMC scoots the low east faster than the consensus and has been discounted - though the latest ECMWF seems to be a tad more progressive than the rest, too. The departure of this closed low will take its mid level energy with it, but not before Sunday evening for most of the area allowing limited support for pcpn around through the rest of the weekend.
High pressure centered over North Carolina/Virginia will build into the CWA today. The ridging will help to keep the CWA dry today. Expect highs to range from the lower 60s inland to the upper 60s to lower 70s across the Florida panhandle to the mid 70s across the southern Big Bend area (CTY).
1103 PM EST Thu Dec 22 2016 High pressure behind the cold front will build north of the forecast area tonight.
This will bring a weak cold front through the forecast area. Digging upper trough will move inland over the Pacific Coast today.
213 AM EST Fri Dec 23 2016 A low pressure system will result in unsettled weather this Christmas weekend. High pressure will be in control through much of today. As the system moves in from the west overnight, high pressure will continue to move eastward and out of the region. Some colder valleys, especially in the Greenbrier Valley, could see temps drop to around freezing. Model soundings indicate that on the onset of showers, those colder valleys could see a breif period of freezing rain before sunrise, before changing to all rain. High pressure fills in behind a weak front Friday with slightly cooler temperatures.
312 AM CST Fri Dec 23 2016 Warm front will continue moving northward across our area today.
433 AM EST Fri Dec 23 2016 High pressure will continue to move off to the east today.
A weak cold front across northern areas of the CWA will attempt to make some southward progress overnight, but that will likely be limited.
303 AM EST Fri Dec 23 2016 A low pressure system will result in unsettled weather this Christmas weekend. High pressure will be in control through much of today. As the system moves in from the west overnight, high pressure will continue to move eastward and out of the region. Some colder valleys, especially in the Greenbrier Valley, could see temps drop to around freezing. Model soundings indicate that on the onset of showers, those colder valleys could see a brief period of freezing rain before sunrise, before changing to all rain.
123 AM EST Fri Dec 23 2016 High pressure will build in from the west tonight and settle south of the area Friday.
248 AM CST Fri Dec 23 2016 The forecast will remain dry for today with high pressure in control as the high center moves into the Carolinas.
258 AM EST Fri Dec 23 2016 High pressure axis will continue to push eastward today, with surface ridging nosing down the Appalachians creating yet another CAD wedge. Expect increasing clouds into this afternoon and evening periods as cold front approaches from the northwest.