Aikyam-Lab/Synoptic-Bench huggingface dataset:
742 PM EDT Tue Jul 28 2020 Hot and humid weather will continue with an increase of showers and thunderstorms over the next few days as trough of low pressure approaches the area. Bermuda High will get suppressed southward this period as the mid to upper trough extends southward from the Great Lakes through midweek. This will push Piedmont trough eastward as it becomes more amplified. Hot and humid weather will continue, but temps Wed aftn will run a few degrees less due to clouds and rainfall, mainly in the lower 90s.
646 PM CDT Tue Jul 28 2020 A cold front will move south through the forecast area from Canada this afternoon. After frontal passage, high pressure settles overhead tonight. The high remains in control Wednesday and Wednesday night.
Otherwise, building high pressure over the Great Basin region bringing dry conditions and triple digit heat to valleys across central and northern Nevada through the weekend.
/Issued 332 PM CDT Tue Jul 28 2020/ A mid to upper level high is currently sitting over the southwest to include Mexico, CA, AZ, and NM. An area of low pressure sits between the Great Lakes and the Hudson Bay. Northeast to easterly winds at the surface will create storms this afternoon in the higher terrain of NM and CO, then move into the FA from the northwesterly steering flow. However, most of the area will have to wait until this evening for rain to move in off the higher terrain. For tomorrow, daytime highs will be slightly warmer with temperatures in the 90s for much of the FA.
739 PM EDT Tue Jul 28 2020 An area of high pressure over the northern Ohio Valley will provide dry weather through Wednesday.
1010 PM EDT Tue Jul 28 2020 A cold front will cross the region overnight.
The expectation is for a few stronger thunderstorms to continue, mainly in the higher terrain this afternoon and evening before weakening quickly after sunset. Hot and dry conditions will be the theme going forward as a strong ridge of high pressure sets up shop over the Great Basin and Four Corners Region.
902 PM EDT Tue Jul 28 2020 Hot and humid weather will continue with an increase of showers and thunderstorms over the next few days as trough of low pressure approaches the area. Bermuda High will get suppressed southward this period as the mid to upper trough extends southward from the Great Lakes through midweek. This will push Piedmont trough eastward as it becomes more amplified. Hot and humid weather will continue, but temps Wed aftn will run a few degrees less due to clouds and rainfall, mainly in the lower 90s.
Upper level thermal trough will move east of northern Utah this evening. High pressure will become established for the remainder of the week and into the upcoming weekend resulting in hot and dry conditions.
634 PM CDT Tue Jul 28 2020 A check of the water vapor imagery and 12Z upper air analysis across the CONUS shows a large closed low sitting between Hudson Bay and the Great Lakes with troughing across the eastern third of the U. There is ridging across the western half of the country although there are disturbances impinging on the ridge including one over northern UT/southern ID that will affect us Wed and Thu. At the surface, high pressure was situated over the CWA with stationary fronts lying east/west over southern SDak and southern KS.
The leading edge of the flow field associated with an upper level trough was reaching central Colorado this afternoon. By Wednesday, flow field associated with the upper level trough will be father east.
Short term NAM/GFS and ECMWF maintains the conv chcs for one more day and then start trending them down Wed Night into Thurs as 500 mb ridging builds over TX and an inverted trough axis over the region shifts westwards.
953 PM CDT Tue Jul 28 2020 A cold front will move south through the forecast area from Canada this afternoon. After frontal passage, high pressure settles overhead tonight. The high remains in control Wednesday and Wednesday night.
1026 PM EDT Tue Jul 28 2020 A front and trough of low pressure will linger over the region into the weekend. Aforementioned broad trough will initiate convection once again on Wednesday. With the clouds and rain, temps held down somewhat, with near climo readings in the upper 80s to the low 90s. Will see a pattern shift during the period, as upper trough and surface front move into the region. A broad upper level trough will move into the Eastern US Wednesday and linger through the weekend.
High temperatures will still top out in the 90s to around 100 in the warmer spots.
832 PM EDT Tue Jul 28 2020 Seasonable temperature and periodic rainfall chances are expected through the weekend under a trough of low pressure. Gradual clearing will continue as the cold front exits east and dry air overspreads the Ohio River Valley. With a trough positioned just north of the Great Lakes, cooler air will advance into the region under NW flow and yield more seasonable overnight temperature.
Issued by National Weather Service Wilmington NC 722 PM EDT Tue Jul 28 2020 Hot and humid weather will continue with an increase of showers and thunderstorms over the next few days as trough of low pressure approaches the area.
Cumulus fields show some evidence of convergence downwind of the Lassen convergence zone while a weak 700-500mb trough lifts into southern Oregon. Otherwise, conditions for the region will be much drier for the remainder of the week into the weekend with high pressure building.
The upper level low/trough that has brought mountain thunderstorms to our area the last several days has finally pushed off to the east and is now pushing into Wyoming and the northern Plains. This means quiet weather for us as a short wave ridge builds in. Originally models had a short wave trough moving though the NW part of the state tomorrow but they have slowed that down a bit. That means the ridge will remain over us tomorrow bringing another hot day but not quite as hot as today.
301 PM MDT Tue Jul 28 2020 Upper ridge continues dominating the local region.
-Mottice Upper ridge continues dominating the local region.
606 PM CDT Tue Jul 28 2020 A broad, closed upper low continues to rotate eastward over Ontario, Canada this afternoon. Positioned at the southwestern periphery of the longwave trough, provides the local area with northwest flow aloft. At the surface, high pressure has built in overhead and behind a cold front, which continues to settle to the south. Much like yesterday, areas under the cloud cover and especially under any rain showers, have remained several degrees cooler. Despite the cold front dropping south, temperatures north of the front are warmer than yesterday, given the ample amount of sunshine.
Storm activity will likely occur along or near a warm front across srn SD and a weak Pacific cold front advancing slowly through the Panhandle and northeast Colorado. These thunderstorms, supported by a developing low pressure system moving off the Rockies into central Nebraska, will encounter sufficient instability across much of the Panhandle and north central Nebraska.
Disturbances along this boundary may produce thunderstorms late Wednesday night into the weekend, when a more substantial upper level low pressure system looks likely to more into the region and eject the boundary but produce additional shower and storm chances. Clear skies across the region this evening as high pressure has settled across much of the Ohio Valley.
1049 PM EDT Tue Jul 28 2020 An area of high pressure over the northern Ohio Valley will provide dry weather through Wednesday.
KLCH radar currently shows showers and patchy light rain dwindling acrs the lower Atchafalaya Basin.
511 PM MDT Tue Jul 28 2020 00Z TAF CYCLE Upper high center has relocated to central AZ with substantially drier northwest to north flow aloft over NM.
529 PM MDT Tue Jul 28 2020 Water vapor imagery shows the upper low slowly crossing Wyoming at this time, within a Rex block across the western to central CONUS.
/Issued 631 PM CDT Tue Jul 28 2020/ A broad and weak mid level trough is in place over OK, with what appears to an MCV spinning near OKC/Norman.
This ESE flow is thanks to a low level ridge to our north.
Upper level ridging tomorrow into Thursday along with the lack of a focusing mechanism will preclude thunderstorm chances for all but the mountains during the afternoon and early evening hours both days. A short wave trough, now over western Wyoming, will amplify (mainly through convective processes) and dig down through the central Plains tomorrow and reaching the southern Plains Thursday.
Today and Tomorrow: Water vapor imagery shows a deepening trough over the northern Rockies.
High pressure is situated firmly over the area with an upper level cut off low over the Hudson Bay area of eastern Canada keeping it locked in place with northwesterly flow aloft, with this pattern maintaining itself over the next few days as well. Light winds and similar overall conditions compared to yesterday are in store for today, with temperatures peaking in the low 80s as dew points settle at or just below 60 for most of our area. High pressure remains in place over the area giving us yet another day with mostly sunny to partly cloudy skies and no major weather concerns.
1126 PM MDT Tue Jul 28 2020 Small upper low evident on satellite along the Idaho/Wy border will move slowly across Wy on Weds before dropping southeast over the central plains weds night and Thursday.
Back to the west, solutions seem in reasonable agreement that thunderstorms generating off the higher terrain in northern New Mexico and southern Colorado will be tamped down a bit this afternoon as upper heights build into the central Rockies. A short wave trough currently over the northern Rockies will dip down into the northern Plains, driving a cold front into the forecast area Thursday.
High pressure pushes in through the period which should result in weak winds tonight then a bit more of a steady onshore regime for Thursday. This resulting from the pressure gradient between the high vicinity of Lake Superior and low pressure moving through mid Miss Vly.
220 AM CDT Wed Jul 29 2020 At 2 AM, a cold front was located over southern Clayton and Fayette counties in northeast Iowa, and the southern half of Grant County in southwest Wisconsin. Low temperatures on Thursday morning will range from the lower 50s to mid-60s. Weak high pressure will dominate through the remainder of the work week with dry weather, seasonable temps and some morning fog in favored valley/low-lying areas. Over the weekend, northwest flow will amplify as deeper troughing spreads into the Great Lakes.
421 AM EDT Wed Jul 29 2020 Scattered showers and a few thunderstorms are possible ahead of a slowly diving cold front today through Thursday.
214 AM EDT Wed Jul 29 2020 An upper trough and a weak cold front are expected to push into the region Thursday.
Temperatures are generally in the upper 50s and low 60s from the Red River Valley westward, with cooler temperatures in the lower 50s near Lake of the Woods. Look for another day in the upper 70s to low 80s across the region, with warmer temperatures further west. Nearly zonal flow aloft will gradually transition to northeasterly flow tonight into Thursday as H5 ridging builds to our west. This will gradually transition eastward through the night and into Thursday, ensuring continued dry weather and warmer temperatures. Highs for Thursday will be in the lower 80s in northwest Minnesota, with upper 80s further west in the Devils Lake Basin.
305 AM EDT Wed Jul 29 2020 Large upper level low centered over/near James Bay this morning will elongate in more southwest-northeast fashion and sink south over the next 48 hours. But coverage is then called in question, as mid level lapse rates are very weak and the low-mid level winds are also unidirectional.
Issued by National Weather Service Wilmington NC 114 AM EDT Wed Jul 29 2020 Hot and humid weather will continue with an increase of showers and thunderstorms over the next few days as a trough of low pressure approaches the area.
312 AM CDT Wed Jul 29 2020 Weak, mid level nearly barotropic low circulation featuring mild mid level temperatures and weak elevated instability drifting from Wyoming into western South Dakota, supporting elevated convecting this morning across central South Dakota in the vicinity of a mid level trough axis. Convection will weaken around mid morning but despite low surface dewpoint air coming off of nearby high pressure, NAM BUFKIT profiles support enough instability for diabatically driven convection this afternoon, so long as convective debris dissipate/drift out of the focus area of central/western South Dakota.
246 AM CDT Wed Jul 29 2020 High pressure will shift farther east of the region today, allowing warm and increasingly humid air to spread in from the southwest. 06z surface map placed weak high pressure over northern KY. The cold front that pushed through the area early yesterday morning, had turned stationary from the southern tip of IN back into central MO. Highs should top out in the upper 80s to around 90, and dewpoints creeping into the lower 70s from the southwest will push afternoon heat indices into the mid 90s over the western half of the area. Fairly muggy conditions overnight with lows only dropping into the lower 70s.
A few short wavelength upper troughs were objectively analyzed over central and southern portions of Oklahoma, with a larger-scale trough over the northern Rockies. The high PW values and slow storm motions over scattered areas of wet ground and elevated river levels lead to a flash flood/areal flood/river flood concern, but the lack of a focusing mechanism and 1-hour flash flood guidance values well above 1.
Afternoon highs are expected up into the upper 80s(F) in central Kansas to the lower 90s(F) in portions of southwest Kansas. With a cold front pushing through western Kansas overnight, should see lows mainly down into the 60s(F) by daybreak Thursday morning. In the wake of Thursday's disturbance, upper level ridging will develop over the Rockies, with northerly mid level flow across the high plains by late week.
132 AM EDT Wed Jul 29 2020 [Through 06Z Thursday] A mix of MVFR/VFR conditions will prevail through the overnight hours with the highest likelihood for MVFR conditions (mainly due to cigs). Therefore, may see a the highest rain chances a little more inland across SE Alabama and SW Georgia.
However, with the freezing level about 12500 feet AGL and very slow storm motion localized heavy rainfall will be a threat, as will wind gusts of 50 to 60 mph with some fairly dry low levels south of Interstate 90. With some cloud cover around and a little cooler air leaking in from the north temperatures should not be as hot today. Some clearing from the north overnight will allow for lows in the upper 50s in parts of southwest MN with mid 60s along the Missouri River where clouds will hang in longest as will the higher dew point air at the surface.
429 AM EDT Wed Jul 29 2020 A weak cold front will approach from the Great Lakes late today, then sag south through Pennsylvania Thursday.
306 AM EDT Wed Jul 29 2020 Dry weather is expected for most areas today, though shower and thunderstorm chances return near and north of I 80 this afternoon with a weak cold front. Periodic rain chances are then expected through the weekend under a trough of low pressure.
Northwesterly flow aloft will still be present today as an upper level low continues to traverse across Ontario. Thursday, cyclonic flow aloft will shift off to the east leaving us with northerly flow as an upper level ridge builds in from the west.
1048 PM MDT Tue Jul 28 2020 Water vapor imagery shows the upper low slowly crossing Wyoming at this time, within a Rex block across the western to central CONUS. Models continue to show this upper low sliding into the CWA late tonight into Wednesday, then drifting south to southeastward Wednesday night into Thursday morning. Additional thunderstorms are then expected in the afternoon and evening, as the main upper low crosses the CWA. The upper low will be slow to move out on Thursday, so lingering storms will be possible late Wed night into Thursday morning, especially across southwest SD. Strong upper ridging will be in place across the western CONUS, with NW flow across the region.
329 AM EDT Wed Jul 29 2020 Expect dry weather today under high pressure.
Pretty quiet in the short term, as high pressure slowly drifts east out central Illinois. However, a fairly quick return of moisture will begin Wednesday morning, so the highs in the upper 80s will feel more like the low-mid 90s. The larger upper wave remains on track to bring more widespread rain and scattered storms Wednesday night into Thursday, but high pressure building south into the Great Lakes will end the rain from north to south Thursday night. However, model trends have been changing with the late week system, which was supposed to carve itself out of the upper trough in the central Plains.
High pressure is expected across the area today. Dry weather expected today as a narrow ridge of high pressure remains. Convective potential over the southern Great Lakes in association with a short wave trough moving through that area expected to stay to the north. Model data suggest a gradual development of an upper trough over the Midwest during this period.
A more significant upper wave will dive out of the Central Plains on Thursday with cold front moving into northeast Oklahoma Thursday morning.
144 AM EDT Wed Jul 29 2020 A front and trough of low pressure will linger over the region into the weekend. Aforementioned broad trough will initiate convection once again on Wednesday. With the clouds and rain, temps held down somewhat, with near climo readings in the upper 80s to the low 90s. Will see a pattern shift during the period, as upper trough and surface front move into the region. A broad upper level trough will move into the Eastern US Wednesday and linger through the weekend.
401 AM EDT Wed Jul 29 2020 Scattered showers and a few thunderstorms are possible ahead of a slowly diving cold front today and tonight.
1141 PM EDT Tue Jul 28 2020 A cold front will cross the region overnight.
Storm activity will likely occur along or near a warm front across srn SD and a weak Pacific cold front advancing slowly through the Panhandle and northeast Colorado.
Temps will be warmer on Wed with highs in the upper 80s and lower 90s over the southeast plains, in the 80s in the high valleys, and in the mid 70s to around 80 in Teller County. An upper-level ridge is expected to continue building over the Great Basin region, bringing more northwesterly flow aloft to Colorado and some drier air to the region. Meanwhile, a trough moving through the Great Lakes region is expected to send a cool front through the plains on Thursday, which should cool temperatures by a few degrees and provide enough lift to increase the precipitation chances across the far eastern plains near the Kansas border. Afternoon highs are expected to generally be in the 80s across the lower elevations.
1211 AM EDT Wed Jul 29 2020 Seasonable temperature and periodic rainfall chances are expected through the weekend under a trough of low pressure. Dry and seasonable weather is expected overnight under a ridge of high pressure. Temperature will remain above normal through the period, with higher readings expected Wednesday ahead of the cold front.
This temporarily leaves us on the drier and cooler side of the front with temps expected to drop into upper 60s/lower 70s for the morning low. Conditions will begin to change as we head into the late morning/early afternoon as this front begins to slowly lift south as a warm front. (06Z Thursday through weekend) An upper level trough will move out of the Intermountain West, deepening as is pushes southeast into the Central Plains by Thursday. The positioning of this trough will line us up to receive several rounds of PVA, setting the stage for an active weather pattern.
Drier air and warmer temperatures will prevail through Thursday, with some locales in the southeastern plains reaching triple digit highs.
Overnight temps look to remain seasonably warm, as early morning lows Thu fall mainly in the lower/mid 70s. Once again with clouds/rainfall impacting most of the area, afternoon highs on Thu may struggle to climb more than the lower/mid 80s. Afternoon highs on Fri also look to increase closer to the mid/upper 80s, while overnight lows thru Fri remain in the lower 70s/near 70F. The upper level trough pattern digs further south to our west over TX/OK/AR this weekend bringing southwest flow back to the Tennessee Valley. With the upper trough in place, temperatures stay a few degrees below climatological norms with highs in the mid 80s and lows in the upper 60s to near 70.
342 AM CDT Wed Jul 29 2020 Overall, a relatively quiet pattern continues, although a weak upper level low continues to slowly drift southeast clipping southwestern ND. Otherwise, will continue to carry pops into the evening across the region, while tapering them off as the upper low pushes southeast.
Ridging will begin to build later this evening and into tonight, lowering precipitation chances. Cloud cover and rain should maintain abnormally cool daytime temperatures today, perhaps a few degrees warmer than yesterday, with highs generally in the upper 80s/lower 90s. A warming trend will begin on Thursday, with highs generally in the lower-mid 90s across the district.
After collaboration with surrounding office have decided to hold off on any headlines at this time and can be re-evaluate with later guidance to better pinpoint the highest threat area. As for temperatures, lows tonight will be in the upper 60s to lower 70s and highs in the low to mid 80s. The aforementioned low level jet will continue feeding into the boundary over southern Missouri Thursday morning as the upper level trough swings through the area. With the clouds and rain, temperatures will be at or below normal with highs in the low to mid 80s.
115 AM EDT Wed Jul 29 2020 Expect dry weather today under high pressure.
All shower activity should be over by the evening hours and lows tonight will remain in the lower to middle 70s.
247 AM MDT Wed Jul 29 2020 Water vapor shows upper low over northern WY/southern MT with copious amounts of moisture extending through the Northern Plains. At the surface, trof extends from central MT through the NEB panhandle. Upper low will drift slowly southeast today into the Black Hills. Main upper low shifts southeast through the Central Plains on Thursday, but enough moisture/instability in place for additional convection especially from the Black Hill through southwest SD.
217 AM EDT Wed Jul 29 2020 Hot and humid weather will continue with an increase of showers and thunderstorms over the next few days as trough of low pressure approaches the area. Bermuda High will get suppressed southward this period as the mid to upper trough extends southward from the Great Lakes through midweek. This will push Piedmont trough eastward as it becomes more amplified. Hot and humid weather will continue, but temps Wed aftn will run a few degrees less due to clouds and rainfall, mainly in the lower 90s.
Near the surface, a warm front is lifting slowly north across the Oklahoma Panhandle into southwest Kansas. The leading edge of the flow field associated with an upper level trough was reaching central Colorado this afternoon. By Wednesday, flow field associated with the upper level trough will be father east. A cluster or two of thunderstorms is likely Thursday and Thursday night as the upper level trough approaches. In the wake of Thursday's disturbance, upper level ridging will develop over the Rockies, with northerly mid level flow across the high plains by late week.
327 AM CDT Wed Jul 29 2020 Expecting a modest uptick in shower/thunderstorm chances and coverage today across generally the eastern half of Kansas, as a weak/subtle 800-600mb trough moves slowly northeast across the region amidst a continued anomalously moist airmass. This evening and tonight, a separate area of thunderstorms is expected to progress southeast off the High Plains.