Aikyam-Lab/Synoptic-Bench huggingface dataset:
1030 AM EDT Tue Sep 26 2017 A narrow ridge of high pressure will remain centered over the Appalachians through Wed, while Hurricane Maria tracks northward, offshore the coast of the Carolinas. Meanwhile, a dry cold front will approach from the northwest, then cross NC late Thu and Thu night. This display of sun should aid to boost temperatures into the low-mod 80s. Pressure gradient between Maria well offshore of the Outer Banks and an area of high pressure stretching south-to-north along the spine of the Appalachians will result in steady/breezy northeast sfc winds through early evening. The low level flow will consequently back to a (drier) nwly to nnwly direction and result in partly to mostly sunny conditions on Wed.
943 AM EDT Tue Sep 26 2017 Weak high pressure to the northwest and hurricane Maria moving slowly north over the Atlantic east of the mid Atlantic coast will allow some drier mid level air to filter into the forecast area the remainder of the day.
631 AM CDT Tue Sep 26 2017 Water Vapor imagery this morning showing longwave troughing extending from eastern MT through the 4-corners area in the southwest US. Expecting a few thunderstorms to result across central WI while the showers will be diminishing at least west of the Mississippi River behind the cold front. Look for skies to gradually clear from west to east overnight as high pressure builds in from the Plains. High pressure slides across the area Wednesday night with mostly clear skies and cool temperatures. Look for lows in the lower to middle 40s.
1138 AM EDT Tue Sep 26 2017 High pressure in control today.
1030 AM MDT Tue Sep 26 2017 Today, some changes are expected as the jet stream rounds the base of the trough that has remained to our west over the last few days. As the jet drops down, it'll form a closed low over southeastern NV, northeastern AZ and southeastern CA. As the low continues to move to the northeast, heavier precipitation will start moving northward also.
Warm and humid conditions will persist today ahead of an approaching cold front. Models indicate the cold front will move across the PAH forecast tonight and will be located east of our region by 12z Wednesday. The cooler, drier air will lag well behind the front, so highs on Wednesday will still reach the 80s. High pressure will be building southward out of Canada, and we will get to enjoy near seasonal conditions.
947 AM EDT Tue Sep 26 2017 High pressure in control today.
At mid morning the cold front extended from West Texas through Northeast Oklahoma. the cold front is expected to continue to slowly push across the CWA with rain chances spreading into parts of Southeast Oklahoma and Northwest Arkansas. Afternoon temperatures behind the front and underneath cloud cover are forecast to remain in the low/mid 70s today.
The trough over the Great Basin will close off over southern California today.
958 AM PDT Tue Sep 26 2017 High pressure over the Great Basin will bring offshore flow through Wednesday with sunny, warm days and cool nights.
912 AM EDT Tue Sep 26 2017 Warm, humid weather continues today and Wednesday, though it will be cooler for areas closer to the coast. A cold front will move into the area Wednesday night, bringing an end to this warm and humid air mass, replacing it with a cooler and drier one. This cooler, drier weather will last through the weekend. With fog this morning and high clouds crossing the region today, have forecasted slightly cooler readings than yesterday. Otherwise, a large ridge of high pressure will continue to dominate the region today. By Wednesday afternoon, the long awaited cold front will be approaching the region. There may be a shower along the Midcoast as well as moisture converges along a prefrontal trough. Cold front crosses the area Wednesday night with a chance of showers or a thunderstorm as it does so.
1015 AM EDT Tue Sep 26 2017 High pressure will slowly weaken its grip over the area today and Wednesday as Hurricane Maria stalls in the western Atlantic.
12z soundings support high temperatures between 88 and 92 degrees and Max T grids support this range, leaning toward the warmer side. More significant change looks to come at the end of the week as a front backdoors through the area, followed by an influx of drier and slightly cooler air.
Short term models favor SHRA to continue increase in coverage this morning as the cold front edges slowly into the area. The potential for heavy rainfall and Flash Flooding will Looking for showers and thunderstorms to develop areawide today and tonight as lift from a large upper level trough and cold front interact with a moist and unstable airmass across west Texas and southeast New Mexico.
1057 AM MDT Tue Sep 26 2017 Latest upper air analysis shows a short wave trough over the Northern Plains, with a weaker trough over the Desert Southwest. A corridor of higher moisture continues over the Plains between the troughs over the west half and the ridge over the eastern CONUS. The drizzle should end before sunrise as subsidence from the base of the trough from the Northern Plains moves over the forecast area. As the deepening upper level short wave trough over the Four Corners Region slides northeast it will send out a few smaller scale short wave troughs ahead of it over the forecast area. The short wave troughs fill fairly quickly once they move east of the Colorado border as they are moving into the ridge over the southeast CONUS.
539 AM MDT Tue Sep 26 2017 Latest upper air analysis shows a short wave trough over the Northern Plains, with a weaker trough over the Desert Southwest. A corridor of higher moisture continues over the Plains between the troughs over the west half and the ridge over the eastern CONUS. The drizzle should end before sunrise as subsidence from the base of the trough from the Northern Plains moves over the forecast area. As the deepening upper level short wave trough over the Four Corners Region slides northeast it will send out a few smaller scale short wave troughs ahead of it over the forecast area. The short wave troughs fill fairly quickly once they move east of the Colorado border as they are moving into the ridge over the southeast CONUS.
608 AM CDT Tue Sep 26 2017 A cold front draped across our CWA will be the main story over the next 24 hours. The boundary is expected to usher in a cooler airmass with today being the coolest of the days with highs in the upper 60s to lower 70s due to added stratus clouds behind the front lasting most of the day. This cooler airmass will keep our high temperatures in the lower 70s and our lows in the lower 50s through the weekend, making it one of the nicest weekends of the year.
747 AM EDT Tue Sep 26 2017 A narrow ridge of high pressure will remain centered over the Appalachians through Wed, while Hurricane Maria tracks northward, offshore the coast of the Carolinas. Meanwhile, a dry cold front will approach from the northwest, then cross NC late Thu and Thu night. Until that time, however, the MSL pressure gradient between Maria and the (weakening) ridge will result in both the continued wwd expansion of a low overcast this morning, and the development of breezy conditions with diurnal heating over the ern half of the forecast area (from the ern Piedmont and Sandhills to the Coastal Plain). The low level flow will consequently back to a (drier) nwly to nnwly direction and result in partly to mostly sunny conditions on Wed.
736 AM CDT Tue Sep 26 2017 An increase in ridging aloft is evident as temperatures have warmed significantly overnight around 500mb. This has led to an increase in freezing levels to around 15. This is also reflected in the low mixed layer CAPE value of only 456 J/KG this morning.
A weak cold front will move slowly south across the terminals through tonight, bringing widespread showers and a few thunderstorms the terminals. /issued 439 AM CDT Tue Sep 26 2017/ (Today and Tonight) Southwest flow aloft will persist across the area through tonight in advance of a closed upper low over the Desert Southwest. At the surface, a weak cold front is currently situated from near Wichita Falls southwest to near Lubbock.
Light winds and widespread cloud cover across southwest Minnesota may hold temperatures a bit cooler tonight. Threfore, lows temperatures will be in the lower 40s across southwest Minnesota, to upper 50s along the Missouri River Valley. These areas could see temperatures in the lower 70s. Mid-level trough axis will work to clear northwest Iowa Monday evening, and coverage and intensity of shower and isolated thunder activity will quickly drop off.
Clouds mainly on the Idaho side this afternoon will clear tonight as weak upper trough moves away to the east.
The center of the low is advancing north this mid aftn into the arrowhead region and this upper low will move north into Ontario then west and back south into north central MN Monday aftn. Scattered rain showers will continue around the upper low. though some sunny breaks DVL region into SE ND should push that area into the low 60s vs 50s elsewhere.
244 PM CDT Sun May 21 2017 SHowers and a few thunderstorms will continue to develop for areas east of I-65 late this afternoon, as a weak cold front currently approaching I-65 presses eastward. Dry high pressure will be centered along the Ohio River, extending south into Mid Tn.
1249 PM CDT Sun May 21 2017 H5 closed low that has affected western Nebraska the last several days is moving to the north northeast into Minnesota early this morning. H5 ridge along both coasts with a surface cold front along the Gulf. Will continue frost headlines with temperatures hovering around the freezing mark. With the heating of the day and cooler air aloft lapse rates steepen and some marginal cape could see some TRW in the northwest and the southwest where the leading edge of the wave are evident in satellite early this morning. Warmer temperatures tonight with lows on Monday morning in the upper 30s northwest and the low 40s over the remainder of the forecast area.
1109 AM PDT Sun May 21 2017 Dry conditions with warmer temperatures are expected under a ridge of high pressure through the early part of this week.
221 PM CDT Sun May 21 2017 Strong upper low was located across the upper Mississippi valley region early this afternoon. At the surface, a front pushed through the area yesterday and much drier air has pushed into the region, bringing a clear sky and cooler temperatures.
156 PM EDT Sun May 21 2017 Aviation A cold front will push eastward through the region through early afternoon. A weak area of high pressure tracks up the Ohio Valley for tonight and Monday diminishing the risk for precipitation. Later Monday another low pressure system moves in our direction.
241 PM CDT Sun May 21 2017 (Tonight) Cooler and drier air continues to filter into the bi-state region late this afternoon. This should leave the CWFA clear to mostly clear overnight tonight with high pressure across southern Missouri in control. Should be quite a cool night with favorable conditions for raditional cooling in close proximity to sfc anticyclone. Louis in the low 50s. Temperatures on Monday should be quite a bit warmer than that of today for most of the area with south/southwest winds expected at the surface along with 850-hPa temperatures rising to around +10C.
115 PM EDT Sun May 21 2017 Periods of rain and some thunderstorms will continue until the passage of the cold front overnight.
314 PM EDT Sun May 21 2017 High pressure continues to slide east tonight. Low pressure will move in from the west on Monday bringing cool weather and occasional rain. Another low pressure system may affect the region for the middle to latter part of the week. Ridge of high pressure more or less holds to our E tonight. I think initial warm frontal showers will fight the dry air. and we will have to wait for the cold front to bring more widespread precip. The cold front is forecast to more or less wash out over the area as the best forcing for ascent heads into Canada.
High pressure aloft will expand east across the western states early in the week.
The cold front is still back to the west of Nashville and there are some showers developing along the Plateau ahead of the front. The front looks to get held up along the mountains tomorrow with lingering showers in the higher elevations on Monday. Noticeably cooler and drier air is forecast on Monday.
616 PM EDT Sun May 21 2017 Low pressure over the northern Great Lakes will drift across eastern Canada through Monday. The associated cold front will slide across the area this evening and tonight.
638 PM EDT Sun May 21 2017 Periods of rain and a few isolated thunderstorms are possible with the passage of a cold front overnight.
With the cold pool aloft and low freezing levels, any stronger storms that are able to develop would have the potential to produce marginally severe hail, and perhaps slightly larger than that if they can leverage the deep layer shear and/or instability is greater than expected.
A midlevel trough will swing through tonight. Behind it the low levels will start to dry out and clouds will start to break up. An upper low will shift across the upper Great Lakes with warm air advection at the low levels. The freezing level is pretty low around 8 kft so there is a hail threat for any thunderstorm that develop.
250 PM CDT Sun May 21 2017 A cold front continues to slowly push southeastward through Northeast Mississippi. Clearing will continue to take place behind the departing cold front.
315 PM MDT Sun May 21 2017 The early afternoon GOES water vapor animation showed our region wedged between a vigorous upper low over the Upper Midwest and a stout upper ridge off the Pacific coast. High temperatures Monday will be a tad cooler across the northern CWA with the fropa during the morning.
1243 PM CDT Sun May 21 2017 08Z water vapor loop shows a closed low along the SD/MN border with its surface reflection just slightly farther east across south-central MN. Unseasonably cool temperatures will persist, topping out in the lower to mid 50s this afternoon. This will result in afternoon highs from the lower 60s across the northwest to the lower 70s across the southeast. While Monday morning will be mostly dry with some sunshine, expect cloud cover and shower/thunderstorm chances to increase in the afternoon/evening ahead of southeastward advancing cold front.
/issued 1018 AM CDT Sun May 21 2017/ Warmer today with highs in the 70s to around 80. /issued 359 AM CDT Sun May 21 2017/ Scattered showers and storms expected to stay just south of our CWA this morning as mid-level/H7 trough continues to progress eastward over region. Rain chances will increase across mainly northwest Oklahoma tonight as next s/wv trough progresses through base of northern/central U. l/wv trough.
1127 AM MDT Sun May 21 2017 A broad area of cyclonic flow aloft associated with a robust upper low centered over northern MN will likely give way to a fairly un- settled period of weather over the next several days with numerous mid-level disturbances embedded within the flow. Breezy conditions are likely for Monday across much of southeast WY and the western NE Panhandle w/ the passage of the cold front. Believe temperatures will finally rebound some on Tue as ridging begins to build eastward, but fast northerly flow will more than likely keep it cooler (upper 50s/near 60) w/ lingering chances for showers and storms.
312 PM EDT Sun May 21 2017 A narrow cold frontal rain band continues to push east this afternoon, with scattered showers slowly becoming more common east of I-65. The cold front will usher in cooler, less humid air for the rest of the short term. Skies will gradually clear out from west to east this afternoon into tonight, with lows tonight in the low to mid 50s. Monday will start sunny and become partly sunny later in the day, with highs in the low to mid 70s. Most areas will stay dry Monday night, with lows again in the low to mid 50s.
252 PM EDT Sun May 21 2017 A cold front crosses tonight.
Strong upper low was located across the upper Mississippi valley region early this afternoon. At the surface, a front pushed through the area yesterday and much drier air has pushed into the region, bringing a clear sky and cooler temperatures.
127 PM CDT Sun May 21 2017 127 PM CDT Deep upper level low pressure across the upper midwest will continue to stratocumulus deck across the region through the evening and early overnight before diminishing. At the surface, high pressure across the southern plains will shift to the lower Mississippi Valley tonight while low pressure lingers across the northern Great Lakes. Several waves will rotate around the back side of the low beginning Monday which will increase clouds and bring the chance for showers and even a few thunderstorms Monday afternoon. The west/southwest wind on Monday will be a warmer wind then today, thus expect temps to climb above today's lower 60s readings.
342 PM EDT Sun May 21 2017 Periods of rain and some thunderstorms will continue until the passage of the cold front overnight.
242 PM EDT Sun May 21 2017 Shower and thunderstorm chances will increase this afternoon as moisture increases ahead of an approaching cold front.
A cold front will approach the area this evening, and expect scattered development along the front.
/issued 1039 AM CDT Sun May 21 2017/ A cold front currently stretches from just east of Paris, Tennessee to Holly Springs, Mississippi to near Lambert Mississippi. Meanwhile, clearing will continue to take place behind the departing cold front. A cold front is approaching the Mississippi River and will probably make it into middle Tennessee and North Alabama by midday today. East Arkansas may drop another 2-4 degrees before sunrise resulting in lows in the low 60s. a broad trough is positioned over the Nation.
331 PM EDT Sun May 21 2017 A cold front will push east from the Ohio Valley and pass through PA on Monday. Pressure barely dips and does not reach 1012mb along the frontal trough.
A closed upper low was positioned over Minnesota this morning with a surface reflection centered near the TWin Cities. Expect the showers with occasional thunderstorms to continue throughout the day as the upper low drifts toward western Lake Superior and northwest Ontario. Temperatures will remain cooler than normal with the clouds and precipitation during the short term.
159 PM EDT Sun May 21 2017 Hydro A cold front will push eastward through the region through early afternoon. A weak area of high pressure tracks up the Ohio Valley for tonight and Monday diminishing the risk for precipitation. Later Monday another low pressure system moves in our direction.
515 PM EDT Sun May 21 2017 A cold front will push east from the Ohio Valley and pass through PA on Monday. Pressure barely dips and does not reach 1012mb along the frontal trough.
403 PM EDT Sun May 21 2017 High pressure moves east of the area today. A series of low pressure systems will impact the area through the week, resulting in periods of unsettled weather. As a high amplitude ridge moves east off the coast, mainly mid and high level clouds will advect east as warm air advection develops. The first chc of light rain will develop aft 06z from west to east with the approach of the upstream warm front. Light rain will gradually end as the low moves SE of Long Island.
336 PM CDT Sun May 21 2017 A broad upper level trough over Minnesota will continue impacting the eastern CWA through this evening with mostly cloudy skies and breezy northwesterly winds. The biggest question for tonight is whether or not frost forms in the low lying areas of the James River valley and points east. Several areas west of the Missouri River valley saw low temperatures last night in the lower 30s, which could be possible for the James River valley tonight.
344 PM EDT Sun May 21 2017 A large dome of upper level high pressure can be observed on water vapor imagery over the mid Atlantic region.
253 PM EDT Sun May 21 2017 A cold front will push east from the Ohio Valley and pass through PA on Monday. Pressure barely dips and does not reach 1012mb along the frontal trough.
110 PM EDT Sun May 21 2017 A warm front will lift north across Lake Erie this morning as low pressure moves across the northern Great Lakes. The low will continue to move northeast across Ontario and the associated cold front will slide across the region from late this afternoon into tonight.
149 PM EDT Sun May 21 2017 Showers and thunderstorms will affect the region one more day as a cold front moves east through the region today. High pressure will build in for the beginning of the week offering drier and cooler conditions. Surface analysis shows low pressure over MN with cold front extending s-se through IN. Slight adjustments a little cooler with temperature due to observed trends. Expect highs in the lower to mid 70s. Temperatures will cool to the lower 50s in the west to mid 50s in the extreme ern counties. High pressure will build across the fa Monday bringing dry weather and cooler temperatures. Highs will reach only the lower 70s, with a few spots staying in the upper 60s.
326 PM EDT Sun May 21 2017 A cold front will move east through the region early this evening offering scattered showers and thunderstorms. High pressure will build in for the beginning of the week offering drier and cooler conditions. Associated surface cold front pushing east through eastern IN. Scattered showers and thunderstorms were developing across eastern Indiana/western Ohio in the marginally unstable airmass ahead of this cold front. Drier air and clearing will provide cooler temperatures overnight. This high will offer drier conditions and temperatures a little below normal. Mondays highs to range from the upper 60s north to the lower 70s south.
153 PM EDT Sun May 21 2017 A cold front and collocated showers exit the region during the afternoon allowing for some breaks in the clouds heading into tonight. Dry conditions are expected tonight and Monday as high pressure moves into the region.
1105 AM MDT Sun May 21 2017 Low pressure system currently over southwestern Minnesota early this morning will move into northeastern Minnesota this afternoon. Disturbances rotating southward on the west side of the upper low will be accompanied by weak CAA aloft. Monday will be windy an cooler with highs mainly in the lower 50s to lower 60s.
For the upcoming week, dry weather can be expected for the Mojave Desert, with small chances for afternoon and evening thunderstorms each day over the Sierra and the higher terrain of the southern Great Basin.
The sfc cold front that has been slow to progress southeastward across the Four-State Region since yesterday late aftn/early evening, has shifted south of the CWA. The passage of this front has ushered in a bit of CAA, coupled with SCT-BKN CIGS and the recent beneficial rainfall has led to cooler daytime temps late this aftn/ 60s and 70s/, versus the 80s and 90s the last several days. 50 inches /especially across the southern-half of the CWA/ suggests a rather moist atmosphere in the low-mid levels. However, the high PWATS do indicate the plausibility for moderate to heavy rainfall, especially across the southern zones /2.
Water vapor imagery shows a pronounced circulation over the central Great Basin with the main upper low approaching the western Great Lakes region. Pattern will remain active as another impulse dives down the backside of the mean trough and eventually dives across central KS Mon night. Upper low will remain situated over the upper Mississippi Valley for Tue and will slowly sink south. Lows Mon night will be in the low 50s with Wed morning lows in the 40s area wide. Pesky upper trough will finally push east and by 12z Thu will be over the Tennessee Valley. Pattern will not change much with upper low anchored over northern Rockies into western Saskatchewan with southwest flow and a series of impulses passing across the central/southern Plains.
137 PM EDT Sun May 21 2017 Shower and thunderstorm chances will increase this afternoon as moisture increases ahead of an approaching cold front.