Aikyam-Lab/Synoptic-Bench huggingface dataset:
929 PM CDT Fri Mar 20 2020 Quiet high pressure night continues. The high slides east late tonight, with southerly flow returning to the area on Saturday. This will allow warmer air to be pulled up into the region, with high temperatures ranging from the mid 30s east to the mid 40s west Saturday afternoon.
1014 PM EDT Fri Mar 20 2020 A large area of high pressure will build from eastern Canada down into the Commonwealth this weekend, bringing dry, but colder weather.
Weak upper troughing will bring a repeat of today's weather Saturday.
Cold front pushing through the coastal waters this evening taking most of the rain with it.
/Issued 346 PM CDT Fri Mar 20 2020/ Skies will continue to clear from northwest to southeast this evening, allowing temperatures to fall below freezing across much of northeast Oklahoma and northwest Arkansas.
Showers will persist through this evening ahead of an approaching cold front. Will start to feel the cool down behind the front overnight as lows range from the lower 50s in NE AL to the mid to upper 40s in NW AL. High pressure will quickly build in, reinforcing the CAA by keeping winds ~10mph. Daytime highs will reach the upper 50s to the lower 60s Saturday afternoon and fall into the low/mid 40s overnight.
Satellite imagery and 500mb RAP analysis showed southwest flow across the region today, with an upper trough near the Great Lakes.
604 PM CDT Fri Mar 20 2020 Much cooler temperatures today versus 24 hrs ago as strong cold air advection overspread the region behind the cold front.
733 PM EDT Fri Mar 20 2020 Colder and drier air will move into the Ohio Valley tonight behind a strong cold front.
910 PM EDT Fri Mar 20 2020 A cold front will cross the area tonight.
948 PM MDT Fri Mar 20 2020 20z surface analysis had high over northwest MN and warm front across central MT into CO. Temperatures a bit cooler as cold front moves through the CWA.
At present, ceilings are mainly VFR with a few locations such as KGPT and the New Orleans terminals near the lower end of MVFR.
Surface analysis this evening places a cold front from Middle Tennessee back through North Mississippi and into Northern Louisiana. Winds in the NW portion of the CWA are already beginning to shift to the NW as a cold front continues a SE progression. A rain-free and cooler day is expected for the Mid-South on Saturday.
Chances for RA/SHRAs will increase through the TAF period as the earlier cold front stalls offshore and begins to lift north in the afternoon.
CAA is the name of the game with Nly winds of 10-20 mph and temps in the low 40s at the moment. Dew Points continue to dry out with the cP airmass and 1040 mb anticyclone over Lake Gitche Gumee and modest northerly cold flow. max temps appear to rise to 47-50 F(a tad colder in Scott/Jefferson Co IN, a tad warmer in Logan and Butler Co KY). Thus a chilly Sunday morning sunrise with temps around freezing, with valley locations and traditional cool spots dropping into 25-30 F range. The trough will sharpen up and allow for some rains to form in the afternoon. Another disturbance aloft swinging into the region will hold the trough in place.
251 AM MDT Sat Mar 21 2020 Current surface map places high pressure across the upper midwest with warm front across Montana into eastern Wyoming. This will result in warm front moving into western South Dakota early today. Cold front tries to sneak into northern portions of forecast area tonight. Some uncertainty on the plains of western South Dakota where NAM/GFS have trended a bit cooler.
Dry and cooler weather will return for the weekend under high pressure. High pressure approaches from the Midwest this weekend. Cold advection will prevail during the approach of the ridge axis. Temperature will drop about 5 degrees below the seasonal norm on Saturday but recover to be seasonable Sunday as the axis of the ridge departs to the East.
1154 PM EDT Fri Mar 20 2020 Partly to mostly cloudy and cold overnight as high pressure builds in across the Great Lakes. Morning lows will be in the lower 20s. However continued unsettled as next srn stream disturbance ejects northeast ahead of reloading wrn CONUS mean trough late Tue with rain overspreading the area once again. Vigorous sfc cyclone track up through wrn OH likely to yield some decent rainfall totals once again.
Quiet high pressure night continues. The high slides east late tonight, with southerly flow returning to the area on Saturday. This will allow warmer air to be pulled up into the region, with high temperatures ranging from the mid 30s east to the mid 40s west Saturday afternoon.
In the wake of a cold frontal passage earlier today, strong cold advection will bring a cold night to central Indiana. Cooler than normal temperatures will continue through the weekend. This will initially allow cooler than normal and dry conditions to settle in over the area.
1212 AM CDT Sat Mar 21 2020 High pressure will settle in across the region overnight leading to clear skies and cooler temperatures overnight. Temperatures should be warmer, so expect a cool rain to perhaps a rain/snow mix during the day, with some light snow overnight.
404 AM EDT Sat Mar 21 2020 A cold front will drift into north GA this morning.
Temps today will be a bit warmer than yesterday, but still below average for late March. Some very light snow/freezing drizzle or even just drizzle is not out of the question, although not expecting any accumulation Sunday. Temps will be quite a bit warmer Sunday with locations mostly above the freezing mark by afternoon. A cold front will exit the area Sun evening out of the far southeast zones. An upper level ridge will move over the Northern Plains. Forcing is expected to be more from warm advection as low level moisture moves northward under upper ridge. Lows Tue morning will be below freezing in the north and above freezing in the far south. High pressure is expected to move into the Thu.
357 AM CDT Sat Mar 21 2020 The weather remains pretty quiet today with pseudo zonal flow across our region, with the overall pattern across the CONUS featuring spit flow with northern stream troughs translating across Alberta/Saskatchewan and the upper Midwest region and southern stream energy was lifting out of the desert southwest. high pressure centered in eastern Neb will migrate east today and low pressure will develop over CO ahead of the system moving out of the southwest CONUS. Southerly wind speeds will be on the increase in a tightening pressure gradient in between the departing ridge to the east and the trough/low pressure to the west. The system tonight is slower to depart than models indicated 24 hours ago and chances for rain linger across our southern/eastern zones Sunday morning or early afternoon before the trough axis departs.
Front will enter the CWA overnight then quickly wash out as ridging briefly reasserts itself on Saturday. Upper level ridging will continue to persist through much of this period. This will continue to maintain much above average temperatures across the region with highs reaching the low to mid 80s.
303 AM CDT Sat Mar 21 2020 A chilly weekend is on tap across central Illinois with high temperatures only reaching the lower 40s. End result will be a partly sunny and cool day with highs remaining in the lower 40s. A couple tenths of an inch of snow will be possible on grassy surfaces across this area:however, most of of the snow will be melting as it falls as temps rise well above freezing.
A classic, split-flow pattern is currently in place across the CONUS with a pair of cut-off lows near/off the West Coast. Broad, west-southwest flow aloft spreads downstream of this trough across the Southern Plains and Southeast states with the subtropical ridge confined to the Gulf of Mexico and FL. This second jet is providing a subtropical moisture feed and will keep precipitable water near to slightly above normal ahead of each trough. Temperatures will be cooler today with highs mainly in the 50s (with a few 60s in north MS).
341 AM CDT Sat Mar 21 2020 A milder day ahead as high pressure slides off to the east and a southerly flow returns to the area.
As the day progresses on Saturday, slight mid-upper level ridging develops across the area, shifting precipitation away from the area.
As the high continues eastward today, we'll see much of the stratus over the Midwest advect into the mid-Mississippi Valley. This upper level ascent will help deepen weak low pressure over the Central Plains, which in turn will amplify warm and moist advection on the backside of the departing high.
Low pressure will move east across the region today bringing another chance of showers and snow showers.
Precipitation should be coming to an end in the southeast this evening, as cooler and drier air continues to filter into the state behind the front. Temperatures across the north tonight will drop down to near or just below freezing tonight, especially in the more cold prone areas. Tomorrow should be fairly nice, albeit a bit cooler than recent days, with highs generally in the 50's statewide.
With returns at this time showing up on regional radars, yet no precip at the surface yet, believe its just a matter of time before the lower atmosphere gets saturated.
325 AM CDT Sat Mar 21 2020 At 3 AM, high pressure was providing light winds. On Sunday, a low pressure system will move from the Central Plains east into the Mid Mississippi River Valley. At this time, the highest chances (albeit small) will be in southwest Wisconsin and northeast Iowa. On Sunday night, a cold front will move east through the region. Depending on temperatures, there may be the possibility of some light freezing rain in northeast Iowa and southwest Wisconsin.
144 AM EDT Sat Mar 21 2020 A cold front will slip south through the region by Saturday night.
Later today, a weak cold front will slowly push into the region with an increase in moisture and the possibility of a few showers and thunderstorms. However, forcing is weak and rain coverage is expected to be on the low side with max PoPs below 50 percent.
Upper level high pressure will remain stretched across the southern Gulf of Mexico today and tonight. At the surface, a weak cold front was dropping southward across the Southeast. Highs will be in the mid to upper 80s across the interior, and the low 80s at the beaches.
A southwesterly flow aloft today and a southeast to northwest- oriented upper ridge across the Panhandles will keep dry conditions through about 00Z Sunday. A cold front will push west and south into portions of the northern and eastern Panhandles Sunday with drier conditions expected. Downsloping west and southwesterly surface flow ahead of the cold front will allow for much above normal conditions Sunday across most of the forecast area.
Current surface analysis reveals a northeast to southwest oriented cold front draped along and near the Ohio River. Expect much colder temperatures to filter in tonight behind the front as winds veer to the north, with morning lows dropping into the low to mid 30s for most. After a dry and chilly Saturday night, an upper-level wave will interact with an inverted sfc trof over eastern Kentucky, bringing light rain across the area on Sunday.
851 PM PDT Fri Mar 20 2020 A low pressure system centered over central California will maintain generally onshore flow with scattered to isolated showers at times into Saturday morning west of the mountains, and a slow warming trend into Sunday.
High pressure will be in place tonight with an upper level disturbance arriving tomorrow which will bring light rain to the area tomorrow afternoon through tomorrow night.
from about Au Train to Grand Marais this morning but will diminish by sunrise and subsidence with the approaching high pressure finally becomes too great to overcome. In the extended, the GFS and ECMWF show a 500 mb trough in the western U. Light winds less than 15 kts expected across the lake today with high pressure in control.
The NAM remains the coldest in the low levels, but in general all the model guidance is a bit warmer and temperatures in general are marginal for snow. The precipitation should be all rain by midday as warming occurs through the low levels.
1114 PM CDT Fri Mar 20 2020 Much cooler temperatures today versus 24 hrs ago as strong cold air advection overspread the region behind the cold front. there could be a period of snow or a rain/snow mix early Sunday morning north of Interstate 70 before transitioning over to all rain as temperatures climb above freezing.
Trailing weak cold front will move into the area on Sunday and may be sufficient for isolated showers or areas of drizzle as low level moisture is not shunted southward.
At the surface, high pressure was centered over eastern Nebraska which has kept skies clear and winds light overnight with temperatures falling into the low to mid 20s.
A slow moving cold front continues to move through Middle Tennessee. Showers will scoot east with the boundary as cooler temperatures fill in behind.
Temperatures today will be much warmer given modest warm air advection.
311 AM CDT Sat Mar 21 2020 A warm front is predicted to move into wrn Nebraska today.
1145 PM CDT Fri Mar 20 2020 Updated aviation section for 06z tafs The main concern in the short term is the potential for near freezing temperatures tonight and Saturday night, followed by our next chance of light rain on Sunday. After a balmy start to the day, falling temperatures and brisk north winds have followed the passage of a cold front. Saturday and Saturday night will be dry as Canadian high pressure migrates east from the Upper Midwest across the Great Lakes and into southeast Canada. Even with what should be a good deal of sunshine on Saturday, highs are only forecast to reach the upper 40s to lower 50s, with lows Saturday night in the lower to middle 30s.
355 AM EDT Sat Mar 21 2020 A 1040 mb high pressure will move across the northern Great Lakes today bringing a period of dry weather that continues into tomorrow.
Upper level ridging is staying strong over the area keeping fronts away from the area.
A large and sprawling area of high pressure over the Gulf of Mexico will build back over the Sunshine State and the adjacent Atlantic and Gulf waters.
High pressure will build in across the area tonight for mostly clear/partly cloudy skies. Saturday will see increasing clouds as the high slides off and a weak mid-level trough approaches from the Northern Plains. and then rain chances move in across portions of northeast IA into southern WI Sunday afternoon as another mid-level trough pushes east from the Central Plains. Light rain and snow chances are on tap for much of the area Sunday night as yet another trough rolls across the area.
324 AM EDT Sat Mar 21 2020 Dry and cooler weather will remain in place through Sunday under high pressure.
from about Au Train to Grand Marais this morning but will diminish by sunrise and subsidence with the approaching high pressure finally becomes too great to overcome. In the extended, the GFS and ECMWF show a 500 mb trough in the western U. N gales and heavy freezing spray will continue to diminish this afternoon into tonight as the pressure gradient relaxes and high pressure takes over tonight. Winds become light for Sat, under 15 kts, as the high pres passes across the area. S to SE winds will then increase to 15-25 kts across much of Lake Superior Sun into Sun night as the high exits and a weakening low pressure trough approaches.
Overnight low temperatures into Sunday morning will not be as cold with the increased cloud cover and return south flow dropping into the 30s staying above the freezing mark.
110 AM EDT Sat Mar 21 2020 Dry and cooler weather will return for the weekend under high pressure. High pressure approaches from the Midwest this weekend. Cold advection will prevail during the approach of the ridge axis. Temperature will drop about 5 degrees below the seasonal norm on Saturday but recover to be seasonable Sunday as the axis of the ridge departs to the East.
Rain is now beginning to end in the ArkLaMiss Delta as a cold front is now advancing into the area. Though cooler air will spill into the area behind the front, the drier air looks to lag a bit as cloud cover continues through much of the day Saturday in weak cold air advection/isentropic ascent. /GG/ On Saturday night, the surface boundary that is currently pushing through the region will begin to move back into the region from the south as an advancing warm front.
331 AM EDT Sat Mar 21 2020 Partly to mostly cloudy and cold overnight as high pressure builds in across the Great Lakes. Morning lows will be in the lower 20s. 1040 mb high pressure passes by to the north, but with some vorticity around we'll have some clouds nearby allowing for a mix of sun and clouds during the day. After starting the day in the low 20s, this is more typical of a February day around here. Increasing warm air advection by the end of the overnight keeps us a few degrees warmer (mid 20s) Saturday night despite minimal cloud cover. Warm air advection is able to help the area warm from the morning low temp in the 20s to the low 40s.
The cold front now from just NW of BNA-CRX is near the back edge of the main rain area. High pressure will quickly build in, reinforcing the CAA by keeping winds ~10mph. Daytime highs will reach the upper 50s to the lower 60s Saturday afternoon and fall into the low/mid 40s overnight. Showers will become numerous and spread SW to NE across the forecast area on as the disturbance lifts NE and an inverted trough moves through. WAA in place will push the daytime high up a few degrees into the lower 60s. Overnight lows will be warmer, in the lower 50s.
251 AM EDT Sat Mar 21 2020 Cooler today under dirty high pressure.
Decent isentropic lift is in place for much of the day, but the low levels remain dry. the synoptic pattern hints at a more active period again with a series of stronger waves aloft and a stout cold front passage mid to late week.
A return of filtered sunshine and the westerly breezes will allow temperatures to rebound into the lower to middle 70s Sunday afternoon.
High pressure across the Great Lakes will slide east today as a storm system moves through the Rockies and towards the central plains.
1048 PM MDT Fri Mar 20 2020 The upper level low that is over Nevada this afternoon continues to weaken as it opens up and retrogrades some back into California. Looking for 2 to 4 inches at the highest elevations as the wave moves through. Those areas not seeing any precip will still see plenty of cloudiness and cooler temps thanks to the increased clouds. Some snow accumulation will be possible heading up to Vail Pass but amounts look on the low side and all models agree that precip will end at noon. Warmer temperatures and melting on roadways will likely preclude any significant accumulations or highlights.
Winds shift to the N/NW near the surface behind the cold front tonight with winds remaining W/WSW above the inversion. JB Chattanooga Airport, TN 65 45 63 52 67 / 10 10 70 80 50 Knoxville McGhee Tyson Airport, TN 60 43 63 50 64 / 20 0 60 80 70 Oak Ridge, TN 60 42 63 52 64 / 10 0 60 80 60 Tri Cities Airport, TN 58 37 61 44 61 / 20 10 50 90 80.
Overcast skies, and warmer south flow returning this evening, should result in warmer lows tonight in the upper 40s/low 50s.
A weak cold front will continue to slowly move into the region with light showers now moving into the SE AL counties. Forcing is weak and overall rain coverage is expected to be on the low side with max PoPs below 50 percent.
400 AM PDT Sat Mar 21 2020 A low pressure system centered over Central California will maintain generally onshore flow and a few light showers early this morning.
/issued 429 AM CDT Sat Mar 21 2020/ SHORT TERM (Now through Sunday): The series of 500 mb short waves that brought the cold front to the RGV last night will lift out to the NE today as the 500 mb pattern becomes more zonal over the region. Later today and Sunday, the 500 mb ridging will start to build over RGV which will decrease the overall moisture levels in place. Meanwhile, the old cold frontal boundary will likely become more stationary near the lower TX coastline and will start lifting back to the N-NE. This will allow the low level winds to shift around pretty quickly from the E-SE later today into Sunday. More abundant sunshine on Sun will allow for warmer temps. Prefer the warmer GFS and ECMWF temps through today and Sun.
608 AM CDT Sat Mar 21 2020 The weather remains pretty quiet today with pseudo zonal flow across our region, with the overall pattern across the CONUS featuring spit flow with northern stream troughs translating across Alberta/Saskatchewan and the upper Midwest region and southern stream energy was lifting out of the desert southwest. high pressure centered in eastern Neb will migrate east today and low pressure will develop over CO ahead of the system moving out of the southwest CONUS. Southerly wind speeds will be on the increase in a tightening pressure gradient in between the departing ridge to the east and the trough/low pressure to the west. The system tonight is slower to depart than models indicated 24 hours ago and chances for rain linger across our southern/eastern zones Sunday morning or early afternoon before the trough axis departs.
348 AM MDT Sat Mar 21 2020 Overnight WV/IR imagery depicted a split flow aloft with the CWA sandwiched between a northern stream trough over the north-central CONUS and southern stream trough over the southwest CONUS.
1005 AM EDT Sat Mar 21 2020 Another warm day across east central Florida, with a western Atlantic ridge remaining draped across central Florida and the eastern Gulf. Light winds this morning, due to the ridge, before winds become SE around 10 mph early this afternoon as a seabreeze develops. Highs in the mid to upper 80s across the interior, while the seabreeze caps coastal temperatures in the low to mid 80s.
Dry north northwesterly flow aloft continuing into Sunday with upper level lows well to the north and south of the area.
SHORT TERM (Now through Sunday): The series of 500 mb short waves that brought the cold front to the RGV last night will lift out to the NE today as the 500 mb pattern becomes more zonal over the region. Later today and Sunday, the 500 mb ridging will start to build over RGV which will decrease the overall moisture levels in place. Meanwhile, the old cold frontal boundary will likely become more stationary near the lower TX coastline and will start lifting back to the N-NE. This will allow the low level winds to shift around pretty quickly from the E-SE later today into Sunday. More abundant sunshine on Sun will allow for warmer temps. Prefer the warmer GFS and ECMWF temps through today and Sun.
357 AM MDT Sat Mar 21 2020 Overnight WV/IR imagery depicted a split flow aloft with the CWA sandwiched between a northern stream trough over the north-central CONUS and southern stream trough over the southwest CONUS.
A fairly vigorous mid level s/w trough will move out of southern Canada and into North Dakota and northwestern Minnesota this afternoon & evening. BUFKIT soundings in our northeastern zones indicate the low levels remaining pretty dry this afternoon & evening. Sunday will feature warmer temperatures as the southerly flow continues. Through the day, our forecast area will be out ahead of an area of low pressure and associated frontal boundary that will be moving into the western Dakotas.
On the plains, weak cold front drops south in the afternoon, though impact on weather/temps will be minor as maxes remain in the 50s/60s along and east of the mountains.
525 AM MDT Sat Mar 21 2020 Overnight WV/IR imagery depicted a split flow aloft with the CWA sandwiched between a northern stream trough over the north-central CONUS and southern stream trough over the southwest CONUS.
633 AM CDT Sat Mar 21 2020 A chilly weekend is on tap across central Illinois with high temperatures only reaching the lower 40s. End result will be a partly sunny and cool day with highs remaining in the lower 40s. A couple tenths of an inch of snow will be possible on grassy surfaces across this area:however, most of of the snow will be melting as it falls as temps rise well above freezing.