Aikyam-Lab/Synoptic-Bench huggingface dataset:
324 AM EST Mon Feb 12 2018 TODAY AND TONIGHT: Ridge over the western Atlantic is rebuilding back to the west across the region this morning, allowing a drier airmass to move into the region.
235 AM CST Mon Feb 12 2018 A 1044 mb high pressure system was centered in ND and was providing clear skies and rather light winds to the dvn cwa. Today: High pressure centered across the Upper Mississippi Valley will supply sunny and cold weather to the area. Tonight: The center of the highs slips into lower MI so we start out clear early in the evening. Light east to southeast winds and thickening cloud cover (as seen on time height sections) will keep temperatures warmer than early this morning.
High pressure will bring a drier airmass to the region for Monday and Tuesday. Forecast soundings show that precipitation will initially be a mix of freezing rain and sleet. High pressure and a drier airmass will build into the region for Monday with highs ranging from the upper 20s in the far north to around 40 across the far south. The center of the high will pass across the ern Great Lakes Monday night, bringing mostly clear skies.
347 AM EST Mon Feb 12 2018 A cold front will sink southward and into the forecast area this afternoon. The approaching cold front is forecast to move into the forecast area this afternoon and shift just south of the area tonight. The temperature guidance was close with highs in the lower and middle 70s today.
301 AM EST Mon Feb 12 2018 Quiet week ahead as broad, flat ridging builds across the southeast US in response to height falls over the Southwest. Strong Canadian high pressure will transit the area during the next 24 hours before becoming established over the Atlantic Seaboard for the midweek period. 850mb temps settling near -12C behind yesterday's cold front will support highs on the cool side of normal for mid February, in the mid 20s. With an abundance of snowpack and 1044mb high pressure parked directly overhead, radiational cooling potential will the central forecast issue for tonight. Left the forecast as is in the low/mid single digits. Return flow behind departing high pressure emerges by late Tuesday while a steady feed of energy shears off of the southwest US upper low.
Satellite pics show an upper low circulation tracking through southeast Oregon this evening. Focus of light precipitation has been from central Malheur county (Jordan Valley) into the higher terrain south of the Snake River. The showers are associated with an upper trough as it deepens over the region. The winds will subside Monday evening with light winds expected on Tuesday as high pressure settles into the area.
Surface winds will shift around to the south on Monday then to the southwest on Tuesday as surface lee troughing develops.
1136 PM CST Sun Feb 11 2018 An Arctic cold front will finish moving southeast through the region this afternoon and evening with a period of gusty west- northwest winds. High pressure will move into the region Monday. It looks like moisture is a limiting factor, so have kept pops on the low side.
328 AM CST Mon Feb 12 2018 Taking a look at the 500mb pattern today, much of North America (minus eastern AK and western Canada) is under the influence of a large trough extending from the main low over northern Canada. The result has been a subtle ridge developing over WY/SD. The slight ridging will remain overhead through today, and become surpressed tonight as the northmen extend of the western trough moves in. Closer to the sfc, we're still under the influence of a ridge of high pressure, extending from northeastern MT/western ND. Warmer air on the back side of the exiting high, on south-southwest winds and still plenty of clouds, will keep temperatures from falling too far tonight.
256 AM CST Mon Feb 12 2018 High pressure was centered over northeast Montana at 08Z with ridging into southern Minnesota, with fast northwest flow aloft. The center of the high moves over Minnesota by 00Z Tuesday. The high center drifts off to the eastern Great Lakes tonight as the warm air advection continues. Moisture will be slowly on the increase tonight ahead of an upper level trof that moves into the Dakotas late.
108 AM EST Mon Feb 12 2018 A slow moving cold front will approach tonight, then move through the area late Monday, as high pressure builds in from the north. High pressure will then prevail until another cold front crosses late this week. Monday: A slow moving cold front will be approaching the area in the morning. Meanwhile, high pressure will build in from the north later in the afternoon. Tuesday: High pressure will be to the north while the front is offshore.
Across Wise and Russell Counties, there is a chance that the colder air will spill in fast enough to produce some freezing rain. Main concern will be across the High Knob area. For tonight and Tuesday, models show another upper wave producing an inverted trough across the region. There is enough moisture remaining to produce scattered showers along this trough axis, so will keep chance of rain going. There is a chance that some of the precipitation across southwest Virginia may be in the form of light freezing rain early Tuesday morning.
1053 PM CST Sun Feb 11 2018 Cold high pressure will again build south tonight and bring another cold day to the area Monday.
A low pressure system will move into the region tonight. Forecast for Tuesday looks dry as high pressure settles over the area.
Colder air is spilling into the Plateau with temperatures at or below freezing expected across the Plateau and possibly Wise and Russell Counties of Virginia. The change over to light freezing rain will be brief, but patchy ice accumulations possible, mainly elevated surfaces. Chattanooga Airport, TN 53 42 56 46 / 20 20 30 30 Knoxville McGhee Tyson Airport, TN 48 40 54 45 / 40 30 30 20 Oak Ridge, TN 47 39 54 46 / 30 20 20 30 Tri Cities Airport, TN 48 37 53 40 / 60 30 30 20.
An upper level trough continues to push southward across the forecast area with limited moisture. There will be enough upslope lift in a low level northerly flow to produce snow showers over the higher terrain of Oregon overnight before the system exits into the Great Basin early Monday morning. Skies will be clearing from the north overnight so also expecting some chilly overnight low temperatures along with some breezy north winds especially in the lower Columbia Basin. The increased northerly flow associated with this colder air will also result in upslope flow into the southern Blue mountains and the higher terrain of central Oregon.
At the surface, cold front has now pushed off of the TX Gulf Coast with a high centered over western OK. ECMWF and GFS have come into better agreement with a cold front to move through toward the end of the work week. Both models take what is left of the impulse over southern CA across the central Plains Thu with cold front moving through Thu night. Fire danger concerns are expected to remain on the low side for the next few days.
Latest WPC surface analysis shows a strong cold front affecting the eastern CONUS, draped southward from the Ohio valley to the Gulf. Subsidence, AKA downward motion, from high pressure aloft has allowed for maximum temperatures to rise well into this mid 80s this afternoon across the interior. This synoptic pattern will lead to warm weather, maximum temperatures around 5 degrees warmer than seasonal norms, east or southeast flow, and dry conditions.
/Issued 932 PM CST Sun Feb 11 2018/ The back edge of the low clouds currently currently across far eastern Oklahoma and moving east southeast.
401 AM EST Mon Feb 12 2018 High pressure will build into the region from the Great Lakes today and Tuesday.
These areas continue to hover just above freezing so have only made mention of light rain/sprinkles through midnight with only trace amounts of precipitation expected based on recent observations and radar trends. /issued 740 PM CST Sun Feb 11 2018/ Winter Weather Advisory has expired as areas of light precipitation have mostly ended where temperatures are at or below freezing.
Upper air analysis last evening showed a broad trough over the country with west-southwesterly flow over Texas. At the surface, high pressure was moving over South Central Texas and winds were generally light. Cooler and drier air has moved in with temperatures five to 25 degrees lower than 24 hours ago and dew point temperatures 10 to 30 degrees lower. The low level flow will be northerly to easterly today and tonight. Tuesday a frontal boundary over the Gulf will push back to the northwest as a warm front pushing moisture back over the region.
327 AM CST Mon Feb 12 2018 High pressure over eastern MT resulting in NW sfc flow over valley and adjacent regions.
150 AM CST Mon Feb 12 2018 High pressure building into the area early this morning. Main concern will be impact of weakening mid-level trough ejecting out of the Rockies into the Upper Mississippi River Valley region tonight into Tuesday. Otherwise, plan on another cold day today with high pressure overhead.
140 AM EST Mon Feb 12 2018 as strong arctic high pressure will advance from the northern plains.
A shallow cold front will drop south across the Sandhills and back to the west overnight. Temperatures will be cooler Monday due to post frontal cold air advection. High will range from the low teens along the SDAK border, to the mid 20s across our far south. Monday evening, a chance for light snow will continue, as weak upslope wind in the lower levels persists. The highest POPs will be near 40 percent near the South Dakota border, with a slight chance as far south as I80. Went a few degrees below blended guidance to the mid and upper 30s in heavier snow covered areas, to the lower 40s southeast panhandle into the central Sandhills.
900 PM PST Sun Feb 11 2018 A weak cold front will bring cloudy, cool weather tonight and Monday along with light showers at times.
440 AM EST Mon Feb 12 2018 High pressure will build into the region from the Great Lakes today and Tuesday.
1234 AM EST Mon Feb 12 2018 Upper air pattern consists of a 500 mb trough in the central U. on Mon as a trough digs into the western U.
132 AM EST Mon Feb 12 2018 as strong arctic high pressure will advance from the northern plains.
625 PM EST Tue Dec 19 2017 As low pressure tracks across northern MS/AL/GA, rain will spread across all the TAF sites through tonight and tomorrow morning.
619 PM EST Tue Dec 19 2017 Weak cold frontal passage during the first several hours of the forecast period will do nothing more than turn the winds to northwesterly around midnight. Morning lows in the low to mid 20s may be accompanied by a few lake effect cloud streamers, but rapidly diminishing moisture quality will limit potential.
On Wednesday, southwest winds increase substantially through the day as a cold front approaches.
Mid level ridge is noted across the southeast U. A few sites have reported 1/4 and 1/2 mile so far over the wrn zones and with light southwest flow the low cigs and fog will spread east and northeast while temps cool through the 60s. High pressure will shift to the south southwest 15-20 knots on Wednesday ahead of a cold front.
/issued 358 PM CST Tue Dec 19 2017/ Upper low center was passing overhead this afternoon, with modest instability and attempt by the cumulus field to build mainly across the Rolling Plains. A weak surface cold front may dip southward into the area overnight.
Between 6 pm and 9 pm Wednesday the cold front associated with the strong Pacific storm system will reach the eastern Uinta mountains of NE Utah.
A cold front is bringing rain and mountain snow to the area this afternoon and evening. Tonight and Wednesday the upper level trough will bring rain and snow showers. Later tonight the upper level trough will usher in the much colder air.
/issued 239 PM CST Tue Dec 19 2017/ (Tonight and Wednesday) Light showers will linger across the area through the rest of the afternoon hours, then end over northeast sections by mid evening as the upper low lifts northeast of the area. Temperatures will be cooler tonight, with lows in the upper 30s and lower 40s. Southwest winds and warmer temperatures can be expected on Wednesday as a lee trough develops in advance of an upper level trough diving south across the Intermountain West.
539 PM EST Tue Dec 19 2017 A cold front will push southeast across the region tonight, then high pressure will build in Wednesday.
These warmer temperatures will be the result of our winds returning out of the southwest.
One more mild day is forecast for all the area on Wed, with strengthening southwest flow as upper trough swings sewrd into UT by Wed evening. Max temps will push back into the 60s over the plains as mid level thermal ridge develops east of the mountains, while mild 30s/40s persist over higher elevations.
A strong cold front will move across northern and central Nevada late tonight and Wednesday bringing accumulating snow, gusty winds, and much colder temperatures.
950 PM EST Tue Dec 19 2017 A cold front will move southward through the Ohio Valley tonight, with cooler conditions expected for Wednesday.
303 PM MST Tue Dec 19 2017 Zonal flow aloft/subtle ridging will persist through Wednesday. At the surface, a cold front has stalled across the front range and will return as a warm front tonight and dissipate.
703 PM EST Tue Dec 19 2017 Low pressure tracking eastward will move into the forecast area Wednesday bringing widespread showers, and possibly thunderstorms.
848 PM EST Tue Dec 19 2017 Low pressure tracking eastward will move into the forecast area Wednesday bringing widespread showers, and possibly thunderstorms.
733 PM EST Tue Dec 19 2017 A cold front will push southeast across the region tonight, then high pressure will build in Wednesday.
A low pressure system taking shape over east TX will track east across southern AR to northern GA tonight and Wednesday.
553 PM EST Tue Dec 19 2017 A cold front will sweep east through the region this evening and will be followed by a secondary front on Wednesday.
612 PM EST Tue Dec 19 2017 A cold front will move through tonight with some light showers.
512 PM CST Tue Dec 19 2017 A weak high pressure ridge will move across the area tonight and tomorrow with some clouds and lighter winds. The zonal pattern will give way to a trough pattern with split flow. A trough will develop in the southwest and move out into the plains toward the end of the week.
821 PM EST Tue Dec 19 2017 A cold front will sweep east through the region this evening and will be followed by a secondary front on Wednesday.
756 PM EST Tue Dec 19 2017 It was well above average yet again today with temperatures topping out in the low 80s for most areas with a few spot in the mid 80s. Lows tonight will continue above average with low-mid 60s and upper 50s to around 60 for the normally cooler spots.
550 PM CST Tue Dec 19 2017 Low pressure will advance across the state through the period with ongoing chances of precipitation.
420 PM MST Tue Dec 19 2017 Upper ridging covers the northwestern CONUS, and a low pressure system is pushing into the Pacific Northwest. The upper low will move onshore tonight. As the 850 mb low crosses the Rockies, a warm front will begin pushing into the northern plains. Temperatures Wednesday will depend on the track of the low and where the warm front sets up, but they are expected to range from the 30s across northwestern SD to near 60 across southwestern SD. Models continue to show the track of the upper low through the Four Corners region, weakening as it transitions eastward.
A cold front has moved through the western part of the forecast area and is currently passing over the Blue Mountains. The upper level trough will be passing over the region tomorrow for some continued snow showers mainly over the mountains.
744 PM EST Tue Dec 19 2017 It was well above average yet again today with temperatures topping out in the low 80s for most areas with a few mid 80s. Lows tonight will continue above average with low-mid 60s and upper 50s to around 60 for the normally cooler spots.
Will also increase winds in the higher mountains as cross sections indicate possible gusts in 40-50kt possible over high mountain passes.
1041 PM EST Tue Dec 19 2017 Low pressure tracking eastward will move into the forecast area Wednesday bringing widespread showers, and possibly thunderstorms.
832 PM EST Tue Dec 19 2017 A cold front will sweep east through the region this evening and will be followed by a secondary front on Wednesday.
359 PM MST Tue Dec 19 2017 Zonal flow aloft/subtle ridging will persist through Wednesday. At the surface, a cold front has stalled across the front range and will return as a warm front tonight and dissipate.
A short wave moving across the Southern Plains will push a weak cold front over central Texas through the forecast area overnight.
With persistent warm advection in place tonight, low temps will be slightly warmer than this morning, generally ranging from the low 50s across the southern counties to the mid 30s across northeast Missouri, north of the warm sector. A thermal gradient north and south of the warm front will develop from northwest Missouri to central Missouri, resulting in afternoon highs in the upper 60s and lower 70s south of the front, with values in the low 40s further north.
We continue to watch the potential for another mid level low pressure system developing over the weekend, bringing moderate snowfall amounts to the mountains and mountain passes of north- central Idaho, north to the I-90 corridor.
Afternoon composite analysis reveals deep troughing from the the Great Lakes into New England. downstream from sharp ridging across the central CONUS. and Canadian high pressure just into NW Ontario. possibly tied to arrival of a secondary cold front/push of colder air and weak-ish short wave forcing. Support for lake effect diminishes over the 12 hours or so as cyclonic flow eases/high pressure and drier air nose down from Ontario. Sunshine should return on Friday as high pressure/dry air take control.
1242 PM CDT Thu Mar 15 2018 South winds around 15 to 20 mph with higher gusts gusty expected today across area terminals, with the higher amounts mainly across east Texas.
Low pressure over southeast Colorado will move into Kansas by this time tomorrow. Given the expected low RH, breezy conditions, and location of the low level thermal trough, will go ahead and issue a fire weather watch for much of the area.
Lows overnight will only fall into the low 60s to upper 50s as dewpoints have increased steadily over the past 6 hours.
The highest chances for precipitation will be over the north with decreasing chances further south. These SRLY winds will allow for warmer temps and increasing moisture levels. While the wild fire threat will remain elevated today due to the higher winds.
116 PM EDT Thu Mar 15 2018 Periodic snow showers and cold temperatures are expected the rest of the week under upper level low pressure. No significant accumulation is expected outside of the ridges and north of I-80 where a couple inches looks possible through Friday until snow showers diminish with building high pressure.
258 PM MDT Thu Mar 15 2018 Regional satellite imagery showed quite a bit of low topped convection developing in response to a large upper level trough across western Colorado and eastern Utah. This quick break wont bring much change in airmass compared to Thursday, with temperatures in the low 50s to upper 40s for the valleys and the 30s for the mountains.
700 PM EDT Thu Mar 15 2018 Mostly dry cold front exits tonight. High pressure Friday.
655 PM EDT Thu Mar 15 2018 High pressure will drift across the southeastern U.
419 PM EDT Thu Mar 15 2018 A cold front over the northern part of the forecast area will work its way south across the forecast area tonight. The front will then serve as a focus for precipitation as it gradually lifts north Friday night in response to low pressure moving east from the plains into the Mississippi Valley. The model trend has been for a slower onset of precipitation, and also warmer temperatures Friday night. At this time any freezing rain Friday night looks to occur north and northeast of the forecast area. Despite a gradual increase in clouds in the south and eventually the central part of the forecast area late tonight, there should still be enough radiational cooling in the valleys for at least a small ridge valley temperature difference to develop tonight.
1252 PM CDT Thu Mar 15 2018 A cold front was located early this morning across far northern Missouri and central Illinois. GFS/NAM are both showing a upper low moving into the Central Plains tonight from the rockies. Large scale ascent will increase ahead of this low at the same time low level moisture transport will increase from the Gulf. There may be a brief period of freezing rain or sleet across parts of northeast MO and west central IL early Friday morning due to evaporative cooling with surface temperatures near the freezing mark. Showers will continue Friday afternoon and evening as the low pressure system moves eastward into west central MO by Friday evening.
325 PM EDT Thu Mar 15 2018 Periodic snow showers and cold temperatures are expected the rest of the week under upper level low pressure.
304 PM CDT Thu Mar 15 2018 High pressure influences have kept today nice and dry with mid- upper 60s across most of Middle Tennessee.
An upper level trough will continue to bring rain and snow showers to the area tonight and Friday.
132 PM MDT Thu Mar 15 2018 A large upper level low pressure trough over the Pacific Northwest extending southeast into the Great Basin with south southwest winds aloft bringing Pacific moisture into western Wyoming will produce periods of showers with possible isolated afternoon and early evening thunderstorms may produce small hail and strong wind gusts across the southwest and west with scattered showers east of the continental divide. Snowfall amounts of 2 to 3 inches can be expected over the western mountains with rain to rain snow mix in the lower valleys limiting accumulations.
Should see an hour or so of more heating, so highs on the day may be a degree or so warmer than current conditions. For this evening, expect mostly clear skies to continue with readings falling off into the lower 40s in the north by late evening and into the upper 40s to the lower 50s across the south. Lows will be a little warmer across the west/southwest where mid- high level clouds will stream in late. Lows there will bottom out in the lower 40s. For Friday/Friday night, frontal boundary to the south will stall out and lift back northward as a warm front.
Otherwise expect continued abundant sunshine and cooler highs than yesterday. Today should be a little cooler than yesterday.
Dry high pressure to prevail today leading to only mid/high clouds and enhanced pgfs yielding modest swly winds/gusts.
A warming trend will continue, with low temperatures well into the 60s and high temperatures Friday pushing into the lower 90s out west.
325 PM EDT Thu Mar 15 2018 A cold front over the northern part of the forecast area will work its way south across the forecast area tonight. The front will then serve as a focus for precipitation as it gradually lifts north Friday night in response to low pressure moving east from the plains into the Mississippi Valley. The model trend has been for a slower onset of precipitation, and also warmer temperatures Friday night. At this time any freezing rain Friday night looks to occur north and northeast of the forecast area. Despite a gradual increase in clouds in the south and eventually the central part of the forecast area late tonight, there should still be enough radiational cooling in the valleys for at least a small ridge valley temperature difference to develop tonight.
113 PM EDT Thu Mar 15 2018 Aviation A cold front will slip south of the region early this morning. An area of high pressure tracks eastward through Lower Michigan on Friday. This fair weather system will provide the area with dry weather and cooler than normal temperatures.