Aikyam-Lab/Synoptic-Bench huggingface dataset:
220 AM EST Sun Feb 18 2018 High pressure crosses today. Warm front Monday, and then a cold front midweek. Much of the precipitation has tapered off, with mainly areas of -dz across parts of the lowlands, with some -shsn still continuing across the higher terrain. Overnight, clouds will increase, along with chances for precipitation again, as a warm frontal boundary lifts north across the area. There could be a very brief period of freezing rain or drizzle across the northern mountains early Monday, but at this point it appears to be very marginal, with temps probably rising before much moisture moves into the area.
A weak cold front has moved off the extreme upper coast but the tail end of the front has hung up. WInds should begin to veer to the E-SE and increase as low pressure develops in the lee of the Rockies. Areas near the coast will likely endure low ceilings and periods of fog as warmer air continues to flow over cooler waters. /ISSUED 900 PM CST Sat Feb 17 2018/ The main update with the forecast tonight is to account for a farther south progression of a cold front than previously advertised. Onshore winds will strengthen Sunday afternoon as low pressure over eastern Wyoming deepens.
412 AM EST Sun Feb 18 2018 A frontal boundary pushing south of the CSRA this morning will lift north as a warm front tonight into Monday morning.
This is occurring behind a surface cold front, which has moved well south of the area.
1015 PM EDT Thu Mar 22 2018 Strong surface ridging. subsidence and dry air thru the column remain the rule across the Great Lakes region late this evening with strong high pressure centered well north into Canada. Dry northwesterly winds continue as a large area of high pressure continues to dominate northern Michigan's weather. An upper level low over southeastern Ontario and associated moisture will move southeastward tonight through the early morning hours of Friday before high pressure and much drier air builds back into the Great Lakes region throughout the day Friday. Models are differing in cloud cover tonight with aforementioned upper low and attendant moisture.
/Issued 309 PM EDT Thu Mar 22 2018/ Benign fcst period on tap with ridge-dominated regime under NW flow. Temps should stay above freezing tomorrow morning for areas aside from the NE mtns.
Showers this evening will be scattered and mainly over the higher terrain (generally above 8000 ft), with clouds and virga for most valleys of eastern UT and western CO.
1024 PM MDT Thu Mar 22 2018 Just got a report of 61 MPH at Halleck Ridge on I-80 this evening. Moved up the start time for the High Wind Warning to now for the Arlington Zone. Clouds gradually spreading east across the CWA this afternoon as an upper ridge axis is also moving east over the plains. Some snow will fall over the mtns but amounts not looking as great as earlier with the best accumulations, about 3-6 inches, over the higher peaks. Clearing out Friday night with upper ridging rebuilding over the area.
Have expanded the Freeze Warning to a few more counties and started the warning earlier based on latest obs and vast majority of guidance showing a larger area of below freezing temperatures overnight. Satellite imagery shows mid level cloud cover increasing and spreading into Middle Tennessee this evening, which is anticipated to keep locations west of the Freeze Warning above freezing overnight.
A cold front will near the western-most terminals in eastern Oklahoma by late in the prevailing period.
A cold front will cross the area overnight into Friday morning. A second cold upper level trough off the Pacific Northwest coast will move east and impact mainly northern and western Utah and southwest Wyoming this weekend. The large-scale pattern this evening consists of an upper low over the southern BritCol and northern PacNW coast with southwesterly flow aloft in place over Utah. Otherwise, southerly winds will remain on the high side until the front moves through. As a result, have extended the High Wind Warning until midnight for these areas. A cold front is expected to cross the terminal between 06-07Z, with winds shifting to the northwest and decreasing.
Overnight lows look on track with temperatures in the low/mid 60s inland and upper 60s along the immediate coast. The deterministic GFS/NAM/ECMWF predict the upper pattern to transition from a N-S ridge axis over the CNTRL CONUS tonight to a quasi-zonal pattern Friday night.
1033 PM EDT Thu Mar 22 2018 Currently - High pressure building down the central United States well into the Gulf of Mexico is keeping the Keys in a cool and dry post cold front northerly flow. Temperatures are in the mid 60s and dew points are in the lower 50s. High pressure continues to build southwards through the Gulf of Mexico.
/issued 349 PM CDT Thu Mar 22 2018/ This afternoon's surface analysis indicates that the area of high pressure located over NW Oklahoma yesterday is now centered over the Mississippi River Valley and strengthened to 1030 hPa.
940 PM PDT Thu Mar 22 2018 A weak trough of low pressure and Pacific front will bring showers to areas over and west of the mountains through early Friday morning.
1025 PM EDT Thu Mar 22 2018 High pressure builds from the west tonight.
Clouds gradually spreading east across the CWA this afternoon as an upper ridge axis is also moving east over the plains. Some snow will fall over the mtns but amounts not looking as great as earlier with the best accumulations, about 3-6 inches, over the higher peaks. Clearing out Friday night with upper ridging rebuilding over the area.
As a low level ridge of high pressure slides into the southeast overnight, expect lighter winds and mostly clear skies.
Cooler this weekend with scattered light snow showers possible.
625 PM CDT Thu Mar 22 2018 Updated aviation section for 00z taf issuance 20F plus dew point depressions underneath ample mid clouds advecting across the FA in nwly flow overtop developing warm front/surface boundary. As Plains energy spills in, resuring warm front will further warm/moisten and ultimately destabilize the column.
Low clouds and possible drizzle could develop over eastern Kansas Friday afternoon which will also keep daytime highs cooler.
1222 AM EDT Fri Mar 23 2018 A ridge of high pressure will bring dry weather to region tonight, along with light north winds and cold overnight lows in the mid 20s. This ridge will move off to the east Friday and Friday night as a storm system takes shape across the Central Plains.
No freezing temperatures expected tonight, but readings still will be below normal with lows in the middle 30s east to around 40 west.
931 PM EDT Thu Mar 22 2018 High pressure will continue overnight. /Issued 309 PM EDT Thu Mar 22 2018/ Benign fcst period on tap with ridge-dominated regime under NW flow. Temps should stay above freezing tomorrow morning for areas aside from the NE mtns.
Upper air analysis this morning showed a ridge over the western half of the country with northwesterly flow over Texas. The upper level ridge will move across Texas during this period. Continued southerly low level flow will mean much warmer low temperatures tonight and Friday night. Highs Friday will only be a few degrees warmer than today.
High pressure over the TN Valley will continue to push into the SE US overnight with NW steering flow across the region. Closer to the coast lows will be in the lower 40s. Temps will warm into the upper 60s/lower 70s over inland areas while a weak sea breeze will develop along the coast during the afternoon hours and hold Max Temps there in the lower/middle 60s.
Mean ridging has brought warmer than normal temperatures to the area for this time of year. Tomorrow will be even warmer as flow veers somewhat and transports deeply mixed/downsloped air from the southwest into the area.
Temperatures will remain below normal and cooler than today with more clouds which will be low. Best chance as usual in the eastern Finger Lakes to north branch Susquehanna across the higher terrain. On Friday an upper level closed low will drop through the area with some added low level moisture and lift. Friday night snow showers tapering off as the low level flow shifts to the northeast and the cold air advection ebbs.
Axis of high pressure ridge will remain off to our west/northwest, which will maintain a cool and dry northwest to north gradient wind. The latest short range guidance shows low temps will be in the lower-mid 40s, but some upper 30s are possible in normally colder low spots. The high pressure ridge axis will remain off to the west through much of the day.
Bufkit still continues to show a few hours of moderate freezing rain in the Watertown area, so edited the grids to include more icing potential in the Coteau/Glacial Lakes region. In the advisory area, temps may be a degree or two warmer closer to the rain/snow line, so could see more difficulty in accumulations, as well as a sharper cut-off to the snowfall. Due to the lack of areal coverage of the higher totals, decided on the advisory - and also due to the low confidence. Overall, a rather difficult forecast since we're dealing with differing precip types, temps just above freezing, and a waffling rain/snow line. Depending on time of day and surface temps, some of the "rain" chances could end up turning into freezing rain chances.
Did go on the low end of guidance yet again tonight for overnight lows with temps dropping into the single digits across much of the west and central. Elsewhere, temperatures will still be chilly and drop into the lower teens. The dry weather is expected to persist on Friday, but cloud cover will increase a bit with slightly cooler temperatures compared to today. There will be troughing in the ern U. Ridging moves into the upper Great Lakes 00z Sun. Troughing moves into the Rockies on Sun. In the extended, GFS and ECMWF show a 500 mb trough over the Rockies and a ridge over the lower Great Lakes and eastern U. High pressure center over the Hudson Bay will continue to extend southwest across Lake Superior, allowing winds to remain under 20 knots through much of Friday.
/issued 1003 PM CDT Thu Mar 22 2018/ High pressure remains in firm control of our weather this evening as the sfc center gradually shifts eastward overnight. Therefore, expect low temperatures to run nearly 10 degrees warmer compared to morning lows earlier today despite mostly clear skies during much of the overnight period. Upper ridge just making its way ewd into the western Plains this aftn will continue shifting ewd through Friday.
Mid level clouds will dissipate early this evening with polar high pressure and another cold night expected. The high will shift east for Fri with ely winds developing. High The influence of the dry and cool high pressure system will extend into Friday. Trended towards the cooler guidance numbers for tonight.
Meanwhile, a prominent upper level ridge continued to build eastward into the central plains.
There is still a concern some lake induced clouds will develop along the North Shore down into far western Lake Superior as the low level flow becomes more easterly tonight. Surface and upper level ridging will cover the forecast area tonight and Friday.
1155 PM CDT Thu Mar 22 2018 Updated aviation section for 06z taf issuance 20F plus dew point depressions underneath ample mid clouds advecting across the FA in nwly flow overtop developing warm front/surface boundary. As Plains energy spills in, resuring warm front will further warm/moisten and ultimately destabilize the column.
High pressure, for the most part, will remain in control overnight. Min temps will drop below freezing in our northern Plateau. Elsewhere, temps should hold to just above freezing. A warm front will begin to lift northward during the day.
There may be some spotty light showers across central and eastern MO Friday morning, but the better chance of more widespread and significant showers will begin Friday afternoon as low-mid level warm air advection increases well ahead of a developing low pressure system over the central Plains. Temperatures will be warmer tonight and a little warmer on Friday as southeast surface winds strengthen and surface dew points slowly rise. GKS Elevated convection can be expected Friday night as a strong southwest low level jet brings strong low level warm air advection, theta-e advection, and moisture convergence to our area ahead of an approaching low pressure system in eastern KS. Upper level divergence will also be increasing ahead of an approaching upper level trough in the northern Plains.
923 PM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
Despite the return flow in the lowest levels off of the Gulf, air mass still remains on the dry side and should remain that way through the night with VFR conditions and just a few high clouds. /issued 349 PM CDT Thu Mar 22 2018/ This afternoon's surface analysis indicates that the area of high pressure located over NW Oklahoma yesterday is now centered over the Mississippi River Valley and strengthened to 1030 hPa.
Those clouds will help keep low temps slightly warmer.
617 PM CDT Thu Mar 22 2018 Upper level high pressure ridge overhead this evening will shift east with increasing southwest flow aloft - and increasing high level clouds. Models remain in good agreement with upper level ridging shifting to the east of the region early Friday being replaced by southwesterly mid to upper flow as an upper level trough dives down the West Coast into the desert southwest. Friday still looks to be the warmest day with record warmth likely and the possibility for wind advisory level wind speeds across the northwestern zones in response to a low amplitude short wave trough translating across the Rockies.
/issued 309 PM CDT Thu Mar 22 2018/ SHORT TERM (Tonight through Friday Night): A mix of sun and clouds across the lower valley this afternoon has helped warm much of the area up into the middle and upper 80s. Winds have increased a bit with the increase in pressure gradient at the surface between trough out west and ridging out east. A warming trend will continue at the surface as high pressure aloft sits over northern Mexico throughout the short term period. This will promote warmer surface temperatures away from the cooler sea surface temperatures.
1235 AM EDT Fri Mar 23 2018 High pressure builds from the west tonight.
Temperatures are slated to be even warmer on Friday with winds pretty similar to those that are occurring Today.
Dry, but cool weather conditions continue today with a high pressure in control. The cool north winds off the waters of Lake Huron will hold the temperatures across the Thumb in the 30s, while the rest of the area will reach into the low to mid 40s. A vorticity max will drop down through the Great Lakes tonight with an associated weak cold front. High pressure will strengthen through tomorrow with center of the high located north of Lake Superior. The mid/upper level ridge will drift slightly to the east towards the western Great Lakes. A more pronounced northeast flow will again keep temperatures several degrees cooler across the Thumb.
cold front is moving east into Idaho this evening and steady rain has tapered off to scattered showers over the mountains. Cold upper low offshore this evening with satellite indicating plenty of instability and showers. This low will move inland overnight and Friday with increasing showers across the forecast area. Expect there will be some accumulations over the higher terrain above 3000 feet later tonight and Friday. Temperatures tonight and Friday much cooler than the past few days with lows in the 20s to lower 30s and highs in the 40s to lower 50s.
High pressure will continue to build east over the north central gulf states through Fri. An upper ridge over the central plains and Texas this afternoon will shift east to just west of the MS River Valley by late Fri afternoon. With this pattern a light onshore flow will begin to develop near the surface on Fri setting to the stage for warmer conditions and better moisture return in the lower levels of the boundary layer over the weekend. Highs Fri will climb to the low to mid 70s for most inland areas and the upper 60s to lower 70s close to the coast.
1023 PM EDT Thu Mar 22 2018 Low pressure tracks northeast through the Canadian Maritimes tonight. The area will remain cooler than normal through the weekend.
647 PM CDT Thu Mar 22 2018 Surface and upper level ridging will cover the forecast area tonight and Friday.
The deterministic GFS/NAM/ECMWF predict the upper pattern to transition from a N-S ridge axis over the CNTRL CONUS tonight to a quasi-zonal pattern Friday night.
747 PM EDT Thu Mar 22 2018 A ridge of high pressure will bring dry weather to region tonight, along with light north winds and cold overnight lows in the mid 20s. This ridge will move off to the east Friday and Friday night as a storm system takes shape across the Central Plains.
530 PM MDT Thu Mar 22 2018 Water vapor shows upper ridge over the Rockies with large trof over the far western CONUS. Upper ridge axis will move into the plains overnight as large trof west coast trof advances eastward. While some of the pcpn could fall as light freezing rain across northwest SD, the amount of warm advection should keep the pcpn elsewhere in the form of rain.
1218 AM EDT Fri Mar 23 2018 Low pressure over Nova Scotia will track toward Newfoundland tonight through Friday.
An approaching low pressure system will bring gusty southwest winds and areas of rain through early Friday. A few light showers and areas of drizzle are falling across far north and northwest Coconino County this afternoon - a weak reflection of the southern edge of the moist atmospheric river and longwave trough impacting southern California. With the trough in the area, winds have also been quite strong, with gusts currently over 30 mph along and north of the I-40 corridor. The trough and associated cold front will continue to move across northern Arizona tonight, with rain generally increasing from northwest to southeast across the area.
RAP/HRRR guidance remains consistent on onset of MVFR conditions after sunrise, but they appear to be too slow with the veering of the low level wind profile when compared with the KHGX VAD wind profiler and temporary MVFR ceilings may be possible at the western terminals of CLL, SGR, and LBX prior to sunrise as a result.
Dewpoints are mainly in the low 20s with winds expected to decrease this evening as the boundary layer inversion develops and decouples from flow aloft. Because of this, expect temperatures to be near or below freezing across most of the forecast area. With the growing season already underway across the Cumberland Plateau and lower elevations of East Tennessee, a Freeze Warning will be continued to reflect the potential damage to agriculture and sensitive vegetation where the below freezing temperatures are expected tonight. Chattanooga Airport, TN 35 55 45 64 / 10 10 30 70 Knoxville McGhee Tyson Airport, TN 31 51 41 57 / 0 10 60 90 Oak Ridge, TN 30 51 41 57 / 0 10 60 90 Tri Cities Airport, TN 27 50 34 47 / 0 0 70 90 TN.
957 PM EDT Thu Mar 22 2018 An approaching pressure ridge will extend through the forecast area tonight.
1003 PM CDT Thu Mar 22 2018 High pressure remains in firm control of our weather this evening as the sfc center gradually shifts eastward overnight. Therefore, expect low temperatures to run nearly 10 degrees warmer compared to morning lows earlier today despite mostly clear skies during much of the overnight period. Upper ridge just making its way ewd into the western Plains this aftn will continue shifting ewd through Friday.
Surface analysis this afternoon places a 1030 mb ridge of high pressure over portions of the Middle and Lower Mississippi Valleys. A developing warm front will begin to push north across the Lower Mississippi Valley Friday into Friday night with mild temperatures returning again to the forecast area.
Upper ridge just making its way ewd into the western Plains this aftn will continue shifting ewd through Friday.
A cold front with embedded heavy showers and isolated thunderstorms passed Boise between 7:15 and 7:45 pm mdt.
935 PM EDT Thu Mar 22 2018 High pressure in place tonight and exiting Friday. Another low pressure system this weekend. Have hemmed and hawed about removing the flurry potential in the highest ridges of the northeast mountains for the rest of today given the moisture depth issues, but have left them in for a few more hours with the stubborn stratocu over that area. No real chances for temperature recovery from the cold week going into Friday, but there will be modest increases with some of the lowland areas topping the 50 degree mark.
744 PM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
After a couple days of cooler temperatures, hot conditions will return to the area.
H7 temps decrease slightly over the region on Sunday, which indicates max temperatures will likely be a couple of degrees cooler.
310 PM CDT Sat Jun 17 2017 Cold front lingering to the NW this afternoon moving closer to the region and will be driving tonights weather and into tomorrow. Air behind the front is not that much cooler and tomorrows highs are still expected in the upper 70s/lower 80s.
Temperatures this afternoon have been steadily rising into the low 90s, with mid to upper 90s expected as highs. With the frontal passage in store this evening, cooler temperatures can be expected tomorrow along with less oppressive dewpoints. Highs tomorrow look to top out in the low 80s.
325 PM CDT Sat Jun 17 2017 A closed upper low over northwest Ontario this afternoon will loosen its grip on the forecast area by Sunday as the main low center moves to southeast Ontario. Max temps will be cooler as well with plenty of clouds and showers around.
A cold front will move through by Sunday night and bring cooler and less humid air to the area into mid week. MCV tracked from N Illinois into Lower Michigan along a warm front allowing for some showers and storms to form there. Leading edge of upper level trough was entering western Iowa bringing increasing height falls and dynamics which should help coverage and intensity of storms increase. Cold front should be generally clear of the forecast area by late Sunday night with cooler and less humid conditions settling in for a few days. Weak disturbances will rotate around the upper low resulting in a few chances for mainly diurnal showers/few storms given cold air aloft.
320 PM CDT Sat Jun 17 2017 At 3 PM, there are 3 cold fronts across Mid and Upper Mississippi River Valleys. The second cold front extends from near Green Bay to Cedar Rapids Iowa. The final cold front extends from the western tip of Lake Superior to Sioux Falls South Dakota. It is behind this cold front where temperatures fall into the 60s and 70s.
SHORT TERM (Tonight through Sunday Night): A 500 hPa ridge anchored over North Central and Northwest Mexico will support short term subsidence and stability, as well as hot weather, over deep South Texas and the RGV. High temperatures Sunday will range from the lower to mid 90s near the coast to triple digits across portions of the Mid and Upper Valley.
Slightly cooler air following the weak cold front which crossed the area yesterday has retarded warming this afternoon. An upper level ridge building over the coast will bring a warming trend as it continues to amplify and shift east on Sunday.
Most of the fun observed this afternoon will be dissipating after sunset with a dry but somewhat cooler Sunday.
600 PM CDT Sat Jun 17 2017 A strong cold front will push through the TAF sites overnight. Low clouds in the MVFR range are expected at the DHT and AMA TAF sites behind this cold front, but they will dissipate Sunday morning as well. /Issued 524 PM CDT Sat Jun 17 2017/ For tonight, a cold front will plow southward across the OK and TX Panhandles with strong north winds in its wake.