Aikyam-Lab/Synoptic-Bench huggingface dataset:
646 AM CDT Sat May 9 2020 Our biggest concern will center around the sub-freezing temperatures expected tonight. Initially we will see southerly winds this morning that will turn more southwesterly/westerly by early afternoon ahead of a strong cold front. These southwesterly downslope winds will push temperatures up into the lower 60s despite widespread cloud cover. Temperatures will begin to fall off quickly this evening behind the cold front and it will feel downright cold with breezy northwesterly winds that could be gusting over 20 mph.
344 AM MDT Sat May 9 2020 High pressure provides fair and drier weather today through Sunday, while temperatures remain cooler than average.
High pressure provides fair and drier weather today through Sunday, while temperatures remain cooler than average.
837 AM MDT Sat May 9 2020 High pressure provides fair and drier weather today through Sunday, while temperatures remain cooler than average.
Even though a ridge of high pressure will be allowing for the majority of the Northern Rockies to experience a fairly nice weekend.
823 AM MDT Sat May 9 2020 Colorado remains under a moderate northwest flow pattern today in the wake of an upper trof over the northern and central high plains. Cool and breezy conditions remain after the early morning cold front with still winds gusting in the 20 to 30 mph range on the plains. Temperatures today will be a few degrees cooler behind the front. Gusty northerly winds have pushed across the Denver area early this morning following the passage of a weak cold front. The high resolution models show little if any qpf this afternoon and evening. Clearing skies and dry conditions could allow temperatures to drop below freezing over the northeast plains of CO late tonight.
High pressure building into the region will bring warming temperatures through the weekend. Cooler weather is expected midweek with a chance of showers.
Nevertheless, many locations could see temperatures fall below freezing, with a couple high 20s not out of the question.
This system is diving southeast and rain/snow have been occuring on the north side of the low with enhancement in the area of low to mid level frontogenesis. Highs should be in the 40s on Sunday and lows in the 20s again on Sunday night as winds decrease a bit and clear skies result from dominating high pressure.
Upper level ridge and surface thermal trough will keep the region warm with a few decks of cirrus possibly making it over the Cascades through this evening. With thermal trough in place, northerly 10-20 mph winds will develop across most of the region, especially in the Columbia Basin and into central OR. Expect upper level ridge to start to weaken and kick east ahead of an upper level trough digging south over the eastern Pacific Sunday.
334 PM EDT Sat May 9 2020 Water vapor imagery reveals a mid-upper level trough complex over the Bay of Campeche and southern Mexico which will be the major weather player over the next 36 hours. Although there are fits and spurts of shimmering alto-layers over the eastern Gulf, there is very little cohesion between the lower troposphere and the layers aloft. A cold frontal boundary continues to push south through Florida with dewpoints now in the upper 50s across Lee County. The upper-level node to the previously mentioned trough complex will pivot east from near the Gulf of Tuhanapec to the Yucatan Peninsula tonight. This vigorous warm front will have a short window to push north of the island chain, allowing surface-based parcels to chew on rich theta-e and curved hodographs.
336 PM EDT Sat May 9 2020 High pressure will prevail through the weekend.
316 PM CDT Sat May 9 2020 High pressure remains centered over the Mid-South this afternoon. Temperatures have risen into the lower to mid 60s this afternoon. A quick moving cold front will then move into the Mid-South by mid-day Sunday.
148 PM EDT Sat May 9 2020 High pressure will continue to build across the region; snow showers will wrap up in the next few hours.
After the chilly start on Sunday morning, temperatures will warm quickly into the 60s and low 70s with increasing clouds as a cold front sweeps across the area.
The upper pattern shifts into the mid week with a modest ridge pushing east into the Plains.
Current surface map places low across central North Dakota with cold front dropping through northwest South Dakota-northeast Wyoming. Narrow band of showers associated with cold front across northwest South Dakota into northern Wyoming/southern Montana. Compact upper low located over northwest North Dakota will track into northeast South Dakota early this afternoon.
High pressure building into the region will bring warming temperatures through the weekend. Cooler weather is expected midweek with a chance of showers. Morning satellite imagery and objective analysis show a mid level ridge centered along the Sierra Crest while northwesterly flow aloft prevails downstream across the forecast area. These winds should subside this afternoon as the gradient weakens, and aside from thin high clouds downstream from the ridge axis a tranquil day is in store with a slight warming trend areawide. The upstream ridge axis is forecast to translate eastward Sunday, and as a result a more substantial warming trend is expected across northern and eastern Utah.
Clouds will be on the increase tonight as high pressure moves east, while low pressure heads for the Great Lakes.
That will result in moderating temperatures with much warmer (near to a bit above normal) weather by the middle to latter half of the week.
/Tonight through Sunday Night/ Nwly flow regime continues across the region today, as the upper ridge axis remains anchored over the wrn CONUS and broad-scale upper troughing holds over the NE. At the sfc, cool airmass in place associated with high pressure has kept our temps today 10 degrees or more below normal.
329 PM CDT Sat May 9 2020 A fast moving cold front will move toward the region tonight, reaching western Illinois toward morning and crossing the region during the day. Satellite imagery shows the compact upper low system over south central ND, continuing to rotate to the southeast. The cold front that the upper system is pushing through the area, will break clouds and the scattered showers later tonight into Sunday.
Upper level ridge over Western Washington into Sunday.
340 PM CDT Sat May 9 2020 Latest satellite imagery is showing mid-high clouds spreading across Missouri and Illinois ahead of upper low that is diving southeast over the northern Plains. Latest runs of the GFS/NAM as well as the HREF show this upper low opening up and dropping southeast through the southern Great Lakes while its attendant cold front will move through the CWA late tonight and early on Sunday. There will be a tight pressure gradient behind the front between the low over the Great Lakes and high over the Plains.
Widespread frost and freezing temperatures affected Middle Tennessee this morning with record lows set at both Nashville and Crossville.
124 PM CDT Sat May 9 2020 Northerly flow will diminish early this evening as the center of high pressure over northeast AR drifts east into TN this evening. The ridge then elongates into a west-east fashion across the region. The higher elevations may be spared above the shallow radiation inversion and near area lakes. A weak mid level trough axis noted at 8h and 5h will push through early Sunday morning.
Clear but cool conditions today with high pressure over the area. Upper air morning analysis and moisture channel satellite imagery shows next system to affect the region, is compact closed off upper low over western ND this morning. Unseasonably cold high pressure centered over southern MO will slide east-southeast today through tonight, keeping the area dry and cool. Frost is still a concern this morning due light winds, clear skies and temperatures around freezing or lower. The freeze warning will expire at 8 am as temperatures should be above freezing by then across the entire area.
346 PM CDT Sat May 9 2020 The cold front is on tis way through the region this afternoon and scattered showers have been present across much of the area through the late morning and early afternoon hours.
(This evening through Sunday) Another cool night is expected tonight, although somewhat warmer than this morning thanks to the return of southerly winds. A cold front will move into northwest Oklahoma after midnight tonight bringing a reinforcing shot of cooler air. Between this airmass and expected mid-level cloudiness, high temperatures will be cooler again Sunday compared to today. Models are showing a little more of a QPF signal, although with the highest humidity in the column being at around 700 mb, the GFS and ECMWF QPF amounts may be a little aggressive.
An area of mid-level frontogenesis, along with an area of low pressure and an upper level trough passing by to the south, are responsible for the snow. With temperatures generally a degree or two above freezing, roadways have remained mostly wet. The snow will taper off overnight as low pressure continues moving southeast. Winds will begin to increase from the north on Sunday as the pressure gradient tightens behind the departing low pressure system.
256 PM CDT Sat May 9 2020 The short wave trough is rapidly moving southeast through the region this afternoon. We cancelled the high wind warning and wind advisories far southwest and west central. lows tonight will be in the lower to middle 20s, pretty average for March, but very cool for May.
341 PM CDT Sat May 9 2020 A record breaking low temperature this morning at KCI/KMCI as temperatures fell into the lower to middle 30s across the CWA. This feature will bring a cold front through the area late tonight and will aid in continued cool weather through early this coming week. Convergence along the incoming front, and increasing lift ahead of the upper trough, has resulted in some scattered showers over Nebraska. Limited moisture in the lower levels will prevent much in the form of rainfall, but may be able to squeeze out a couple of hundredths of an inch over northern Missouri.
Temperatures are in the lower 80s with dewpoints in the upper 60s. Meanwhile, a cold front sagging south through north-central Florida features a north-northeasterly wind shift and a sharp drop in dewpoints into the upper 50s. Low pressure will ripple east along the front on Sunday, causing widespread showers and numerous thunderstorms capable of heavy rainfall and gusty winds.
Closer to the ground, a cold front marked mainly by a shift in wind direction to the north is pushing across the Oklahoma Panhandle and will continue to work south through tonight. This low-level jet will also increase the potential for low cloud development at or shortly after sunrise across the Caprock and have increased cloud cover as a result, but not gone totally cloudy just yet as confidence on coverage and timing remains iffy. Jordan Ongoing convection will be possible across northeastern NM late tomorrow evening as a disturbance moves across the upper ridge to our west.
220 PM CDT Sat May 9 2020 Clouds will be on the increase tonight as high pressure moves east, while low pressure heads for the Great Lakes.
Cirrus associated with Gulf disturbance will continue across the southern half of our airspace but will lift out along with the trough itself late tonight into Sunday. /Tonight through Sunday Night/ Nwly flow regime continues across the region today, as the upper ridge axis remains anchored over the wrn CONUS and broad-scale upper troughing holds over the NE. At the sfc, cool airmass in place associated with high pressure has kept our temps today 10 degrees or more below normal.
327 PM CDT Sat May 9 2020 Tonight and Sunday: Though areas of cirrus have continued to stream over the area and cold air advection has prevailed, temperatures have still managed to warm well into the 60s with the high May sun angle.
/issued 1013 AM CDT Sat May 9 2020/ High pressure remains over the Mid-South this morning. Expect highs to reach into the lower to mid 60s this afternoon. A dry cold front will move across the region late Sunday keeping temperatures well below normal.
so much cooler than normal but downslope helping to result in temps approaching 70 late this afternoon. Pressure ridge centered over the Mississippi Valley will build east and settle over the Carolinas tonight. Short wave trough in the Midwest will race east to the Mid Atlantic region late tonight. There may be some mid level clouds associated with this trough later tonight mainly north midlands and other clouds to the south of the region.
106 PM CDT Sat May 9 2020 Our biggest concern will center around the sub-freezing temperatures expected tonight. Initially we will see southerly winds this morning that will turn more southwesterly/westerly by early afternoon ahead of a strong cold front. These southwesterly downslope winds will push temperatures up into the lower 60s despite widespread cloud cover. Temperatures will begin to fall off quickly this evening behind the cold front and it will feel downright cold with breezy northwesterly winds that could be gusting over 20 mph.
Mild and mainly dry weather will continue Sunday into Sunday night under a northwesterly upper flow and high pressure remaining over the central plains.
This will lessen over most areas through the course of the day as high pressure shifts east.
1244 PM CDT Sat May 9 2020 A strong cold front is advancing rapidly south through the nrn High plains this morning and should sweep into nrn Nebraska after sunrise. A reinforcing cold front will drop into nrn Nebraska Sunday and swrn Nebraska will remain in a bank of frontogenetically forced mid level cloudiness.
Temperatures tonight are forecast to dip into the upper 50s to lower 60s, with lows on Sunday night a few degrees warmer.
Most locations this morning started off in the 30s with light snowfall last night at some of the highest peaks above 4 kft. Daily Record Low Maximum Temperatures Date Chattanooga Knoxville Tri-Cities Oak Ridge 05-09 57(1923) 55(1906) 53(1992) 58(1958) With surface ridging centered across the area tonight and a mostly clear sky, expect efficient radiational cooling and calm winds. Locations across the central and southern valley will be on the edge of frost temperatures, but based on the conditions and anomalous nature of the airmass, believe at least sheltered valleys across the lower elevations will see some areas of frost tonight through Sunday morning.
1013 AM CDT Sat May 9 2020 High pressure remains over the Mid-South this morning. Expect highs to reach into the lower to mid 60s this afternoon. A dry cold front will move across the region late Sunday keeping temperatures well below normal.
144 PM MDT Sat May 9 2020 Fast northwest flow aloft continues through the northern plains with upper ridge along the west coast. Water vapor shows strong/compact upper low tracking southeast near the central ND/SD borders early this afternoon, with next upstream compact low over southern SASK. Strong northwest winds continue early this afternoon throughout western SD with temps ranging from the upper 30s in northwest SD to the lower 50s in far southwest SD. The high wind warning in the far northwest expires at 21z, and will re-evaluate around the time to possibly replace with a wind advisory or cancel all-together should the winds drop off enough.
Lows tonight will bottom out in the 50s and 60s with the higher values in the west underneath the low cloud cover. Dry weather is expected to continue tomorrow and tomorrow night as well with the low clouds generally remaining in western CWA.
A large upper low situated over the eastern Dakotas continues to bring a cyclonic flow aloft across the forecast area through Sunday night.
Cool night with good radiational cooling should allow lows to dip into the lower 50s inland.
Temperatures warmed into the low 60s under a mix of sun and clouds. This feature will force a surface cold front through the Ozarks early Sunday morning, bringing a reinforcing shot of cool continental air. Sunday looks similar to today with highs in the low 60s.
Despite the high clouds most sites have cooled as expected. /22/ Prior discussion below: Tonight and Sunday: Though areas of cirrus have continued to stream over the area and cold air advection has prevailed, temperatures have still managed to warm well into the 60s with the high May sun angle.
With the deep trough over eastern CONUS and favorable radiational cooling, temperatures will drop to around 15 to 20 degrees below seasonal average, into the 30s and 40s.
Models are in good agreement on the track of this low right through the center of our area, and confidence is fairly high in widespread precipitation overnight. Cold air advection, cloudy skies, and breezy northwest winds on the back side of departing low pressure will keep things rather cool for Sunday, with highs only in the 40s to around 50.
716 PM EDT Sat May 9 2020 High pressure will prevail through the weekend.
High pressure building into the region will bring warming temperatures through Sunday. Cooler weather is expected midweek with a chance of showers.
Fast northwest flow aloft continues through the northern plains with upper ridge along the west coast. Water vapor shows strong/compact upper low tracking southeast near the central ND/SD borders early this afternoon, with next upstream compact low over southern SASK. Strong northwest winds continue early this afternoon throughout western SD with temps ranging from the upper 30s in northwest SD to the lower 50s in far southwest SD. The high wind warning in the far northwest expires at 21z, and will re-evaluate around the time to possibly replace with a wind advisory or cancel all-together should the winds drop off enough.
708 PM CDT Sat May 9 2020 Latest satellite imagery is showing mid-high clouds spreading across Missouri and Illinois ahead of upper low that is diving southeast over the northern Plains. Latest runs of the GFS/NAM as well as the HREF show this upper low opening up and dropping southeast through the southern Great Lakes while its attendant cold front will move through the CWA late tonight and early on Sunday. There will be a tight pressure gradient behind the front between the low over the Great Lakes and high over the Plains.
VFR conds will prevail through the TAF period under the influence of high pressure invof northeastern AR. A few gusts upwards of 15 to 20 knots will be possible across KHRO and KBPK associated with another cold front.
Much cooler weather along with widespread precipitation returns early this week. Upper level ridging is bringing another hot day to NorCal with mostly sunny skies. The delta breeze will make a push into the southern Sacramento Valley and northern San Joaquin this evening and that will help to keep those areas a bit cooler compared to yesterday, similar highs are expected in northern areas. Upper level ridging will make its journey east on Sunday as an upper level trough begins to dig towards CA. This will bring increased southwest flow to the area and cooler temperatures.
Ridging over the area will continue into Sunday. A bit more moisture will move over the area in the afternoon as the ridge weakens, with isolated showers possible in the evening hours. Temperatures will continue to warm, with values 5 to 10 degrees warmer than what was experienced today.
The short wave trough is rapidly moving southeast through the region this afternoon. We cancelled the high wind warning and wind advisories far southwest and west central. lows tonight will be in the lower to middle 20s, pretty average for March, but very cool for May.
An upper low pressure was centered over Southern Minnesota this evening with a cold front extending southwest through Iowa and Central Kansas into the Oklahoma Texas Panhandles. the cold front will make its way into Northeast Oklahoma and Northwest Arkansas around 09z.
653 PM EDT Sat May 9 2020 High pressure will continue to build across the region.
Cirrus associated with a trough across the Gulf should continue moving through our region overnight and with winds becoming light later tonight, this should result in ample radiational cooling. Overnight lows will likely be a few degrees cooler than what we saw this morning with temperatures likely falling through the dewpoint. Cirrus associated with Gulf disturbance will continue across the southern half of our airspace but will lift out along with the trough itself late tonight into Sunday.
Low pressure will ripple east along the front on Sunday, causing widespread showers and numerous thunderstorms capable of heavy rainfall and gusty winds.
Temperatures are generally in the lower 50s across the area, with a few locations in the upper 40s near the Tennessee River. To our south, a low pressure system over the Gulf of Mexico is advecting in high level cirrus across north Mississippi, while mid level stratus is creeping into northern parts of the Mid-South. A dry cold front is progged to push through the Mid- South Sunday afternoon, but should only result in clouds or a few sprinkles as it swings through. /issued 316 PM CDT Sat May 9 2020/ High pressure remains centered over the Mid-South this afternoon. Temperatures have risen into the lower to mid 60s this afternoon. A quick moving cold front will then move into the Mid-South by mid-day Sunday.
213 PM PDT Sat May 9 2020 Strong high pressure shifts east of the state early in the week.
With temperatures being near freezing for many locations, places that get close to the dew point may see frost in the morning.
Weak cold front will move into northeast Oklahoma late tonight, pushing south to near a MLC/FSM line around 18Z Sunday.
920 PM EDT Sat May 9 2020 Canadian high pressure will build across the middle Atlantic through tonight. The high will drift offshore and yield moderating southerly flow on Sunday, ahead of a moisture-starved cold front that will cross the region Sunday night. There is a lot of high cloud cover across much of the Southeast from low pressure near Louisiana, but so far the bulk of the high clouds have stayed just south of the forecast area. Did increase sky cover a little bit after midnight across southern counties, which may keep lows a degree or two warmer, primarily over locations with the frost advisory. Lows Sunday night will range from the mid-40s west, to the low 50s east.
819 PM EDT Sat May 9 2020 High pressure will prevail through the weekend.
Northerly flow will diminish early this evening as the center of high pressure over northeast AR drifts east into TN this evening. The ridge then elongates into a west-east fashion across the region. The higher elevations may be spared above the shallow radiation inversion and near area lakes. A weak mid level trough axis noted at 8h and 5h will push through early Sunday morning.
The cold front is on its way through the region this afternoon and scattered showers have been present across much of the area through the late morning and early afternoon hours.
913 PM CDT Sat May 9 2020 A fast moving cold front will move toward the region tonight, reaching western Illinois toward morning and crossing the region during the day. Satellite imagery shows the compact upper low system over south central ND, continuing to rotate to the southeast. The cold front that the upper system is pushing through the area, will break clouds and the scattered showers later tonight into Sunday.
636 PM CDT Sat May 9 2020 A fast moving cold front will move toward the region tonight, reaching western Illinois toward morning and crossing the region during the day. Satellite imagery shows the compact upper low system over south central ND, continuing to rotate to the southeast. The cold front that the upper system is pushing through the area, will break clouds and the scattered showers later tonight into Sunday.