Aikyam-Lab/Synoptic-Bench huggingface dataset:
130 AM EST Wed Jan 31 2018 A cold front crosses Thursday, bringing rain. As high pressure moves off to the east today, a decent southwesterly wind flow will develop. With these winds, will go toward the warmer side of MOS guidance for highs. Winds will continue tonight as clouds increase in advance of an approaching cold front. With the clouds and wind, will go toward the warmer side of MOS guidance for overnight lows.
348 AM EST Wed Jan 31 2018 High pressure will cross the region today. A warm front will approach the region from the southwest tonight and cross the region Thursday.
Fog may also become an issue from KALI to KVCT as the winds begin to decrease as the lower CIGS begin to develop. The mid to upper level ridge axis from the western Gulf of Mexico through South Texas into northern Mexico will remain in place through the forecast period. Some mid and high level moisture will move through the ridge axis into South Texas especially Wednesday into Wednesday night. Surface winds will become more southerly to slightly southwesterly on Thursday ahead of the approaching cold front to the north, allowing temperatures to warm notably into the upper 70s to near 80 degrees across most locations.
Clear skies and light northeast winds over the Nature Coast are producing a good radiational cooling setup, with temperatures already near freezing as of 2 AM this morning.
338 AM EST Wed Jan 31 2018 Cold high pressure will move offshore by Thursday.
High temperatures today should exceed normals by 10 to 25 degrees Fahrenheit, north to south respectively, prior to the arrival of a weak cold front.
Expect a quiet short term with high pressure remaining in control as it shifts east of the region. Will see a mix of sun and clouds today and with the high pulling out of the area. bringing warmer air into the Southern Appalachian Region. Clouds will increase late tonight as a cold front begins its approach towards the area.
Another powerful storm currently hitting the Pacific Northwest teleconnects upper ridging that will move off the lee of the Rockies tmrw. With time, beneath that, a surface warm front develops, and ultimately acts as a focusing boundary for elevated moisture advection.
A ridge of high pressure to the west and light southeasterly lower tropospheric wind will allow for some fog development overnight for northern Nebraska and the central Sandhills. At this point the boundary layer seems to have less than ideal moisture for dense fog, so will highlight patchy wording in the forecast Overnight lows are progged to be near seasonal norms, with most locations bottoming out in the lower 30s, though a few upper 20s will be possible across our north and northwest. The upper level ridge of high pressure will build east across the Plains on Thursday and increase low level temperatures.
Moist southwest flow aloft will continue tonight, and a cold front will move inland early Thursday.
Deep upper level trough remains over the Great Lakes region; however, the heights are steadily on the rise by midday Thursday. Thin cirrus shield overhead tonight may help to keep temperatures slightly warmer in a few spots, otherwise still expect temps to fall into the teens across the interior locations and lower 20s closer to the shoreline. Then temps Thursday will rebound into the lower 30s, to slightly warmer across the southeast forecast area where temps could push into the mid 30s.
A lingering canopy of bkn mid level cloud will linger tonight, but skies will remain clear across the lowest 10k ft. Clearing skies then for Thursday under gradually building high pressure. Sustained northeasterly flow behind the large east coast low pressure system will allow for deep column cold air advection over southeastern Michigan on Thursday. Differential height rises locally will support some increased surface ridging over the state by late Thursday but not enough to dissipate the northerly gradient flow. Generally preferred MOS with a cooler blend given good amount of insolation.
/Issued 917 PM CDT Wed Mar 21 2018/ High pressure at the surface will continue to slide east overnight, but overall winds should remain light overnight at most locations. Also made adjustments to low temperatures across a few of the typically cooler locations as latest readings are within a few degrees of the forecast low.
An elongated ridge this afternoon extending from north to south across Central Conus will nudge eastward through tonight toward the Mississippi River Valley. As the ridge slides eastward, the pressure gradients should begin to relax. A highly amplified pattern sets up through the end of the week with troughing along the East Coast and Ridging sliding through the center CONUS.
As of 20Z Wednesday afternoon the stagnant mid-level flow remains across the CONUS with troughing in the east and ridging in the west. At the surface a ridge axis was centered across eastern KS, yielding clear skies and light winds across the area. With the WAA and deep mixing up to H85 to H8 Thursday afternoon high temperatures will range from the upper 60s in northern and far eastern KS to the lower 70s in central KS.
Meanwhile a low amplitude ridge prevailed across the western half of the CONUS along with a developing system situated off the Pacific NW. At the sfc, broad high pressure was in control across the central CONUS.
This high was producing mostly sunny skies across southern Wisconsin and Illinois. On Thursday, high pressure will provide partly to most sunny skies. High temperatures will range from the lower 40s to lower 50s.
/Issued 337 PM EDT Wed Mar 21 2018/ A potent upper level low continues to slowly pivot across the eastern CONUS. Strong northwesterly winds combined with some available moisture in the low/mid levels has helped to promote light snow showers across the higher elevations, especially on the westward slopes. No major impacts are anticipated given road temperatures are generally above freezing.
Breezy to locally gusty southerly winds will also be possible ahead of a cold front that will sweep through the region Thursday morning.
1150 PM CDT Wed Mar 21 2018 Skies are clear and winds have lightened, still out of the northwest, as high pressure ridge slowly moves east toward the area. High pressure moving into central and southeast Illinois tonight will give us a clear and unseasonably cold night.
Upper level ridge axis over the highs Plains continues to shift eastward ahead of the next system to impact the region late week. The highway 20 corridor may even reach near 60.
Look for clouds to gradually pull eastward with the upper low tonight as temperatures once again drop below freezing most areas.
Strong ridge to our west continues its eastward migration and is still expected to pass over Colorado tomorrow. Moisture rounding the top of this ridge mainly above 20k ft asl as per soundings. Few light snow showers lingering over the high peaks and ridges this evening should wrap up not long after midnight. Temperatures throughout northeast and north central Colorado will be 5 to 10 degrees warmer tonight and Thursday.
A high coverage of mid level cloud will linger tonight, but skies will remain clear across the lowest 10k ft. Clearing skies then for Thursday under gradually building high pressure. Sustained northeasterly flow behind the large east coast low pressure system will allow for deep column cold air advection over southeastern Michigan on Thursday. Differential height rises locally will support some increased surface ridging over the state by late Thursday but not enough to dissipate the northerly gradient flow. Generally preferred MOS with a cooler blend given good amount of insolation.
Chattanooga Airport, TN 31 57 36 57 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 29 52 32 54 / 10 0 0 10 Oak Ridge, TN 28 52 32 54 / 10 0 0 10 Tri Cities Airport, TN 28 49 27 51 / 40 10 0 10 TN.
The rest of the week will feature cooler than average temperatures and occasional flurries. NBM/Superblend indicating max temps Thursday ranging from the low 30s over the highest terrain of the Alleghenies, to the low 40s in the Susq Valley.
Mid level clouds will spread into our area tomorrow due to low-mid level warm air advection over a developing warm front.
1205 AM EDT Thu Mar 22 2018 Aviation Our dry but cool weather pattern will continue for the next several days thanks to a persistent area of high pressure centered to our north in Canada.
611 PM MDT Wed Mar 21 2018 Upper ridge will build some over the area overnight through Thursday allowing for mild and fairly quiet weather. main difficulty will be with varying amounts of mid and high clouds moving through the ridge ahead of an upper trough near the west coast.
719 PM EDT Wed Mar 21 2018 Aviation Our dry but cool weather pattern will continue for the next several days thanks to a persistent area of high pressure centered to our north in Canada.
Snow will continue to taper off this afternoon as yesterday's upper low pushes farther east.
Warmer above normal temperatures will prevail for this period across Kansas. Meanwhile current satellite water vapor imagery shows upper trough axis over the eastern Pacific with strong upper jet energy diving down the back side.
1028 PM EDT Wed Mar 21 2018 Currently - The Keys are in cooling flow in wake of an earlier cold front passage. Expect overnight lows to range from the upper 50s to the lower 60s, with the coldest temperatures in the Upper Keys, and the warmest in the Lower Keys. Fresh north breezes will prevail on Keys waters through the overnight period as a strong high pressure system slides southwards near the central Gulf Coast states.
A narrow cloud deck around 6 kft over far sw WI is associated with the trough and will move into south central WI this evening. The cloud deck is expected to thin with time or clear after the passage of the trough.
/Issued 256 PM CDT Wed Mar 21 2018/ High pressure centered over eastern Oklahoma this afternoon will gradually shift to the east of the area Tonight and into Thursday resulting in a warming trend across the area for the remainder of the work week and into the early part of the weekend.
The upper low that has been positioned over the Southern Appalachian Region and causing low clouds and occasional slight snowfall will slowly pull out of the area this TAF period. The low clouds and some isolated snowfall will continue over TRI through the night for MVFR conditions.
/issued 212 PM CDT Wed Mar 21 2018/ Region remains wedged between the trof over the ern CONUS and upper ridge over the Intermountain West, which has left us under dry nwly flow aloft and high pressure at the sfc.
1037 PM EDT Wed Mar 21 2018 Windy conditions continue overnight behind strong low-pressure moving up the Mid-Atlantic coast.
Synoptically a ridge axis was centered over the northern Rockies with northwesterly flow over the northern Plains. Light winds associated with the high pressure and continuing snowpack sublimation were enough to continue patchy fog in the forecast for tonight. Thursday mid-level winds turn southerly in response to an upstream trough approaching from the west.
Only cloud cover during the period should be of the high level variety. /issued 330 PM CDT Wed Mar 21 2018/ This afternoon's surface analysis shows a 1024 hPa high pressure centered over northeast Oklahoma.
Flurries and sprinkles taper off this afternoon with dry and slightly warmer conditions Thursday. Surface ridging over the Northland has kept precipitation limited to snow flurries over the southwestern portions of the forecast area this afternoon. With increased sunshine on Thursday, look for highs to climb a few degrees warmer with readings in the middle 30s northeast to the low 40s south.
714 PM CDT Wed Mar 21 2018 Dry northwest flow aloft with a large upper level high pressure ridge over the southwestern U. edging east - the ridge will be overhead late Thursday. We retained the Low Level Wind Shear remark from the previous forecast.
516 PM MDT Wed Mar 21 2018 An upper ridge is building over the western and central CONUS, with a trough over the east. Dry weather will continue into Thursday, as the upper ridge axis begins to cross the region. The pressure gradient will tighten ahead of an upper wave, and breezy southeasterly winds will keep temperatures near or slightly cooler than today's highs. Type will be mainly rain, although soundings are indicative of some freezing rain across northwestern SD.
A warm front will be accompanied by a period of rain Thursday morning through mid-afternoon, followed by showers and isolated thunderstorms along a cold front late Thursday afternoon and evening. Higher peaks and ridges obscured in clouds and showers. Cold front crossing southeast Oregon and southwest Idaho from the west Thursday afternoon and evening with local MVFR ceilings in heavier showers.
1025 PM MDT Wed Mar 21 2018 Upper ridge will build some over the area overnight through Thursday allowing for mild and fairly quiet weather. main difficulty will be with varying amounts of mid and high clouds moving through the ridge ahead of an upper trough near the west coast.
957 PM EDT Wed Mar 21 2018 Update Our dry but cool weather pattern will continue for the next several days thanks to a persistent area of high pressure centered to our north in Canada.
834 PM EDT Wed Mar 21 2018 High pressure will continue to build in from the west overnight. Freezing temperatures are still expected across portions of north and northwest GA overnight, and no changes to the Freeze Warning are anticipated at this time. /Issued 337 PM EDT Wed Mar 21 2018/ A potent upper level low continues to slowly pivot across the eastern CONUS. Strong northwesterly winds combined with some available moisture in the low/mid levels has helped to promote light snow showers across the higher elevations, especially on the westward slopes. No major impacts are anticipated given road temperatures are generally above freezing.
Dew point values are pretty high, in the low 30s, so as temperatures fall tonight, most models are indicating fog and low stratus forming. Big question is how long it takes, and am thinking it may be mid to late evening, with the lowest visibilities around sunrise.
912 PM EDT Wed Mar 21 2018 Low pressure east of the Delmarva Peninsula will move northeast to a position near Cape Cod on Thursday morning.
/issued 313 PM CDT Wed Mar 21 2018/ An upper trough is over the east coast and weak ridging is over the desert southwest.
High pressure will drift into the area this evening with light winds and a mostly clear sky. A bit warmer on the back side of the high with lows in the upper 30s expected. On Thursday, the high should be to the southeast of the area with a return to southerly winds on the back side of the high and in advance of a developing low in the high plains.
The deterministic GFS/ECMWF predict an upper pattern characterized by a N-S ridge moving slowly EWD from the WRN to CNTRL CONUS, suggestive of subsidence over the CWA/MSA for most of the period. Warmer temperatures are expected given increasing geopotential heights. Anticipate SCEC wind over the Offshore Coastal Waters during the period owing to the increasing MSLP gradient/warmer SST values.
/issued 250 PM CDT Wed Mar 21 2018/ Early afternoon temperatures are currently in the upper 40s to middle 50s and will trend warmer over the next few days. We will see another chance of frost and even freezing temperatures tonight, but it should be the last for a while. The coldest portions of the midsouth, near the Tennessee River may dip into the upper 20s briefly with much of the remainder of the West Tennessee near or slightly below freezing. The a large portion of the remainder of the Midsouth could see frost, but should remain above freezing. Near Tunica and South into the Delta morning lows should be above freezing. Frost can damage any unprotected sensitive vegetation and freezing temperatures may kill any unprotected vegetation.
Fog is still patchy, with Langdon the low spot with a 2 mile visibility.
Deep layer northwest flow will continue tonight as a trough across the eastern CONUS slides into the Atlantic.
804 PM EDT Wed Mar 21 2018 Windy conditions continue overnight behind strong low-pressure moving up the Mid-Atlantic coast.
Langdon is the low spot at a half mile, but most locations are still above 5 miles.
911 PM EDT Wed Mar 21 2018 Cold advection pattern in place with longwave trough axis off to our east and high pressure ridging over the Rockies and Central Plains. This continues to bring in much cooler and drier air down the peninsula and resulted in high temperatures today being anywhere from 10 to 15 degrees cooler than yesterday. It will also lead to a chilly night with most places seeing temperatures fall into the low to mid 40s for lows overnight tonight.
917 PM CDT Wed Mar 21 2018 High pressure at the surface will continue to slide east overnight, but overall winds should remain light overnight at most locations. Also made adjustments to low temperatures across a few of the typically cooler locations as latest readings are within a few degrees of the forecast low.
911 PM CDT Wed Mar 21 2018 Skies are clear and winds have lightened, still out of the northwest, as high pressure ridge slowly moves east toward the area. High pressure moving into central and southeast Illinois tonight will give us a clear and unseasonably cold night.
Over the southwest half of the region southeasterly flow ongoing though light as high pressure over East Texas slides away to the east.
622 PM CDT Wed Mar 21 2018 High pressure moving into central and southeast Illinois tonight will give us a clear and unseasonably cold night.
Temperatures will be near normal to start the work week and may trend a few degrees warmer midweek as high pressure briefly noses in around Weds.
Despite these cooler readings, temperature recovery will be sufficient to keep incoming precipitation all liquid.
A cold front will move south across the area today impacting KABI and KSJT in the 17-20Z time frame and the remainder of the TAF sites by 00Z. Another Cold Front and Turning Cooler. Another cold front will push across West Central Texas this afternoon and tonight. This front will bring gusty winds from the north, along with cooler temperatures.
931 AM PDT Mon Oct 30 2017 Cooler weather is forecast this week under weak low pressure aloft. A low pressure trough will strengthen this weekend, bringing a chance of showers and breezy conditions. Cooler weather is on track this week as a few weak upper-level disturbances move across the region. Light showers and patchy drizzle is possible tonight west of the mountains as the trough over northern CA swings across the area.
/issued 323 AM CDT Mon Oct 30 2017/ Light winds, clear skies, and dry air allowed temperatures to fall into the lower 30s across portions of west TN during the late evening hours, but temperatures have stabilized and have even warmed a few degrees in some areas. Temperatures will be warmer across the board despite a cold front moving into the CWA during the day. Winds will shift from the northwest as the front passes but the reinforcing cooler and drier air will be delayed until this evening and overnight.
624 AM CDT Mon Oct 30 2017 Water vapor imagery shows the cold front moving rapidly to the south with decent CAA over the region. However, this will also make is Max temperatures for Tuesday difficult and could be cooler than currently forecast.
The 7 am regional surface analysis showed a weak ridge across much of the Southeast, along with a cool, dry airmass.
732 AM EDT Mon Oct 30 2017 High pressure over the area with skies mostly clear.
Many locations woke up to their coldest temperatures of the season, with mid to upper 40s recorded areawide, save for some 50s over the typically warmer barrier islands. Not much to add to the morning package as weak high pressure settles over the northern half of the state, leading to diminishing northwest to north winds through the afternoon. High pressure settling over north-central Florida and very dry air will allow for ideal radiational cooling after sunset. In fact, temperatures will likely be even cooler Tuesday morning compared to this morning.
905 AM EDT Mon Oct 30 2017 A cool and dry high pressure system will build into the region through Tuesday.
1156 AM CDT Mon Oct 30 2017 18Z TAF issuance A cold front continues to push south across the area and has now cleared all terminals.
521 AM MDT Mon Oct 30 2017 Current surface analysis shows low pressure over southwest Ontario, with high pressure centered over western MT. Upper level analysis shows low pressure also over far southwest Ontario, with strong upper jet stretching from the Northern Rockies to the northern MS river valley. Highs will only be in the 30s, with some 20s across the higher Black Hills. Temps will drop quickly in the evening as high pressure moves over and eventually southeast of the area. Some milder air will return behind exiting high pressure, as west-southwest winds help push highs into the 40s and lower 50s.
625 AM CDT Mon Oct 30 2017 An upper level trough will continue to plunge southward into the Northern Plains for today, bringing much cooler air and windy conditions to the region. Tuesday will be another cold day, though some warming will be realized over south central SD as winds transition to southwesterly due to surface ridging sliding to the east.
1023 AM EDT Mon Oct 30 2017 Strong low pressure moves north from Upstate New York into Quebec Canada today. Meanwhile, high pressure builds across the southeastern states through Tuesday.
Tuesday the region will be between the cool cyclonic flow to our north and high pressure off to our SW. From Central PA down into the Lower Susq Valley, it will be dry with partly to mostly sunny skies and high temps in the low to mid 50s.
Cooler and very windy weather will persist in its wake through this afternoon.
Chattanooga Airport, TN 63 41 61 44 / 0 0 0 10 Knoxville McGhee Tyson Airport, TN 60 41 59 41 / 0 0 0 0 Oak Ridge, TN 59 40 59 41 / 0 0 0 10 Tri Cities Airport, TN 56 35 57 38 / 0 0 0 0.
731 AM EDT Mon Oct 30 2017 Strong low pressure moves north from Upstate New York into Quebec Canada today. Meanwhile, high pressure builds across the southeastern states through Tuesday.
1122 AM EDT Mon Oct 30 2017 An area of stratocumulus was over the northeast Gulf of Mexico and the Lower Keys this morning, while the Middle and Upper Keys remained clouds free. Temperatures this morning were able to drop to the upper 60s degrees in Key West, while the Middle and Upper dropped to the low 60s and near 60 in some areas of Key Largo. A high pressure over the northeast Gulf of Mexico this morning will move to the northeast tonight into the southeast United States and stretch into the western Atlantic by tomorrow.
609 AM CDT Mon Oct 30 2017 Colder air behind a cold front today, along with windy conditions. There may also be isolated showers today just to our north where cooler temps aloft exist, but don't believe they would make it this far south. Otherwise, quite a bit of cloud cover across the region this morning, and while that may thin a bit this afternoon, it will likely take until this evening to begin clearing out altogether as high pressure moves in. Temps remain on the chilly side with highs only in the lower 40s Tuesday, then dropping into the lower 30s Tuesday night.
Current observations show MVFR cigs as the main cold front has already moved well south of all TAF sites. /Issued 238 AM CDT Mon Oct 30 2017/ Strong upper level trough over the western Great Lakes is driving a cold front southward through the Panhandles early this morning. Another weaker upper level low was moving on shore in Southern California. Clouds should increase and thicken through the day given the upslope flow behind the cold front. The Southern California upper low is expected to open up as it moves into more confluent flow over the Panhandles tonight. The Southern California upper level trough will mainly take most of the dynamics further south and out of our area.