Aikyam-Lab/Synoptic-Bench huggingface dataset:
At the upper levels, a ridge will progress towards western North Dakota through the afternoon, with the axis translating across the state overnight, transitioning the forecast area into a southwest flow regime.
1104 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.
415 AM CDT Thu Mar 22 2018 (Today and Tonight) High pressure across the region will leave quiet weather in place for today and tonight. Temperatures will be a bit warmer than yesterday in the mid 70s to lower 80s with sunny skies. Then for tonight, winds are expected to drop off little bit and low temperatures should drop into the lower 50s.
Guidance indicates some weak ridging aloft should be induced across the area ahead of the next short wave as it moves across the Great Lakes region. In the wake of the departing coastal storm northern stream short waves will maintain a trough over the Northeastern United States. While at the surface, high pressure from over Hudson Bay will drift southeastward across eastern Canada while building southward across the region.
Low temperatures will bottom out in the lower to middle 30s.
MVFR low clouds and a few flurries may linger over the TRI TAF site tonight as an upper low slowly pulls out of the region.
150 AM EDT Thu Mar 22 2018 High pressure across the western Great Lakes and mid Mississippi Valley will attempt to edge closer to northern OH and northwest PA tonight and Thursday and be overhead Friday.
351 AM CDT Thu Mar 22 2018 Today through Tonight: Latest rap and satellite imagery showed an amplified ridge over the Rockies which was providing northwest flow to the region. On the surface a ridge of high pressure was centered over the Midsouth region. Expect areas of frost across the northeast and eastern counties early where some readings were approaching the lower 30s. Otherwise high pressure will bring another day of mostly sunny skies with highs a little more seasonable with readings from the lower 60s northeast to near 70 southwest. With dewpoints mainly in the 30s minimum humidity will dip down into the lower 30s.
315 AM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
630 AM EDT Thu Mar 22 2018 Deep low pressure will continue lifting north along the New England coast. Dry high pressure and cool temperatures will dominate through Friday.
Stratocumulus development is anticipated north across the eastern third of our area during the morning Thursday, as the low-level moist influx continues. The highest gusts (25-30 knots) are expected to be at KABI. /issued 254 PM CDT Wed Mar 21 2018/ (Tonight and Thursday) Dry and warm weather will persist across the area the next 24 hours, as southerly low level flow continues and an upper level ridge moves east into the Plains by tomorrow afternoon. Temperatures will be warmer tonight and on Thursday, with overnight lows around 50 degrees and highs Thursday afternoon in the upper 70s and lower 80s.
130 AM EDT Thu Mar 22 2018 Deep low pressure will continue lifting north along the New England coast. Dry high pressure and cool temperatures will dominate through Friday. East coast troughing will bring more active weather for the weekend. Mixing overnight due to the low-level winds may keep temps up. Northwest winds become light Thursday night, and although temperatures are forecast near or just above freezing, frost may be possible by Friday morning. High pressure will push further east on Friday continuing to promote dry weather across the area. Moisture will deepen some Friday night associated with an area of low pressure approaching the area from the Mississippi Valley region.
/issued 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.
320 AM CDT Thu Mar 22 2018 Breezy south winds and warmer temperatures expected today with afternoon highs climbing into the 70s and 80s.
Little change expected Friday night as the upper low meanders off to the east. 500 mb closed low passes across the area late tonight and on Friday bringing deeper moisture, increased instability, and eventually scattered snow showers, especially over the NY zones.
546 AM EDT Thu Mar 22 2018 Building high pressure should maintain mainly dry weather through Friday.
Little change expected Friday night as the upper low meanders off to the east. 500 mb closed low passes across the area late tonight and on Friday bringing deeper moisture, increased instability, and eventually scattered snow showers, especially over the NY zones. A cool northwest flow off of Lake Ontario will continue under a deep upper level trough over the northeast US. Snow will have a tough time sticking to the road during the day due to air and road temperatures above freezing. Lows Thursday night again in the low and mid 20s fall to upper teens and lower 20s Friday night.
Any warmer in that layer means all rain and no snow. A slower/cooler progression means all heavy wet snow to several inches accumulation - this is the conundrum as both these cities sit on this precipice. Also of note, the NAM is the warmer set of guidance in this layer, though it has the usual bias of a colder boundary layer compared to the GFS.
306 AM CDT Thu Mar 22 2018 Early this morning the region was under northwesterly flow aloft due to a broad mid-level trough stretched across the eastern U. and a mid-level ridge over the Rockies gradually advancing eastward into the central U. During the evening areas near the NE/KS state line will be closer to the trough and the associated forcing as the wave tracks over NE.
413 AM EDT Thu Mar 22 2018 High pressure slowly builds in today and tonight. Another low pressure system this weekend. A northwest wind flow will persist today, although moisture in the lower atmosphere will be rather limited. A high pressure system will then briefly move over the area tonight.
1224 AM CDT Thu Mar 22 2018 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. Upper level and surface ridging will be affecting the forecast area Thursday night and Friday. Friday night finds the ridge being flattened as a long wave upper trof approaches from the West. Moisture will have been fed into the region ahead of this trof.
As the upper level amplified trough approaches today, temperatures should be considerably warmer than yesterday. A significant inversion in the lowest levels with a pronounced dry layer lends more to drizzle. It looks clearly warm enough to not have to worry about freezing drizzle.
Most locations in the forecast area tonight will drop below freezing at some point, but there should be just enough winds to keep away widespread frost formation. Mostly sunny skies today will help temperatures warm up about 5-10 degrees warmer than what we saw yesterday. Clouds will begin to move in from the west ahead of our next system, but in our eastern counties we could see another round of sub-freezing temperatures overnight.
The low level jet continues to push increased moisture across the area Thursday night into Friday morning. Can't rule out few sprinkles and patchy fog areas on Friday morning with lows in the lower 60s.
500 mb and surface ridging will prevail over the RGV over the next 24 hours which will maintain pretty dry and stable conditions. /issued 212 PM CDT Wed Mar 21 2018/ SHORT TERM (Tonight through Thursday Night): 500mb ridge across the western United States will amplify somewhat across the western half of the country through the short term. high pressure across the east-central U. Expect warmer temperatures Thurs afternoon than today as southeast winds increase across the CWA Thursday. Lows Thurs night will also be warmer than tonight as surface moisture continues to increase across the area.
1046 PM PDT Wed Mar 21 2018 A change in the weather is expected as a deep upper level low digs offshore tonight. Most of this precipitation will fall as rain however snow will be possible over the higher mountains. A cold front late Thursday will bring gusty winds and deliver significantly cooler conditions from Friday through the weekend with the threat of rain and snow showers each day.
As upper level ridging continually builds into the region, warmer temps and windy conditions can be expected for Thursday. 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.
Sunny skies are expected, though high temperatures will only reach the low to mid 60s - about 10 degrees cooler than average. trough moving east. A few showers will be possible late Sat night across the Altamaha as a backdoor cold front drops south towards the area. The front will bring a brief period of cooler conditions with a breezy onshore flow to the area. Low pressure continues to deepen as it moves toward the northeast and strong high pressure builds from the west Small Craft Advisory level winds are expected to drop off mid-morning, and should fall to exercise caution levels. High pressure will build across the Southeast through Friday. Another low pressure system is expected to develop but remain north of the area for the weekend.
Showers will increase rapidly this morning as moisture continues to stream northward in advance of a large upper level trough off the coast. These showers and storms will form along and in advance of a cold front that will enter eastern Oregon this afternoon, and move into southwest Idaho this evening. As the cold front moves east of the region late tonight, snow levels will drop rapidly. On Friday, as the main upper level trough moves closer, more showers will form and move into southeast Oregon and the mountains of southwest Idaho. Temperatures will be a few degrees above normal today, especially in southwest Idaho where the cold front will not reach until after peak heating.
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. Uncertainty in accumulation totals along and west of the Missouri River through Lake Sakakawea exist with surface temperatures around or above freezing early Friday morning. As this band of snow passes to our east late Friday the threat for freezing drizzle on the back end arises with ice loss aloft.
Deep layer northwest flow will continue tonight as a trough across the eastern CONUS slides into the Atlantic. Low level ridging will continue to slide southeastward through the period. As the center of the ridge approaches the area, wind speeds will finally lower. Highs will be cooler than normal tomorrow, in the low to mid 60s, but will warmer Friday upper 60s to low 70s.
Temperatures throughout most of the lower and middle Keys have been holding in the mid 60s for most of the night.
Waves of warm frontal precipitation are expected in north-central Idaho and western Montana today. Rain showers are likely to become widespread with the main warm front during the late morning and especially afternoon. A gusty cold front remains on track to move through north-central Idaho and western Montana during this evening. The timing of the cold front looks to be around 1-2 hours slower, which results in an arrival time to north-central Idaho around 6pm-8pm PDT, and near Continental Divide between 12am-2am MDT. Snow levels are expected to drop to at least 3,000 feet behind the cold front with accumulations on mountain passes and mainly grassy surfaces of lower elevations. Rain and snow showers linger into Friday with cooler temperatures.
210 AM EDT Thu Mar 22 2018 Deep low pressure will continue lifting north along the New England coast. Dry high pressure and cool temperatures will dominate through Friday.
the forecast area will be under the influence of an upper level ridge with only some mid and/or high clouds spilling over its axis and across the area. On Thursday 850mb temperatures warm about 7F to 10F supporting highs in the low to mid 70s. Clouds increase Thursday night with lows in the low to mid 40s. west to northwest winds gradually increase from west to east during the morning ahead of a cold front that moves through during the early to mid afternoon. Right now have readings ranging from the low 70s north to low 80s far south. Low temperatures range from the low/mid 30s in far eastern Colorado to the upper 30s to low 40s east of the CO/KS border.
An approaching low pressure system will bring gusty southwest winds and mainly rain showers today through midday Friday. An active 24-36 hours in store weatherwise for northern Arizona as a trough and associated cold front cross the region. Shower chances will increase significantly tonight and into Friday morning ahead of the trough especially along the western Mogollon Rim and Kaibab Plateau where deep moisture and lift will be maximized. 50" range over higher terrain with lesser amounts over the lower elevations. The trough will quickly move through the area Friday morning with precipitation chances decreasing rapidly from midday onward. Dry weather will return over the weekend, but a broad trough over the western United States will generate gusty southwest winds both days.
209 AM EDT Thu Mar 22 2018 High pressure slowly builds in today and tonight. Another low pressure system this weekend. A northwest wind flow will persist today, although moisture in the lower atmosphere will be rather limited. A high pressure system will then briefly move over the area tonight. Ridging in the central Plains is interrupted by a rather wound-up short wave aloft ejecting out of the Rockies with lee-cyclogenesis occurring on the surface by Friday afternoon. As the low tracks across toward our area, it will intensify as it enters the right entrance region of a Great Lakes jet aloft.
601 AM EDT Thu Mar 22 2018 High pressure slowly builds in today and tonight. Another low pressure system this weekend. A northwest wind flow will persist today, although moisture in the lower atmosphere will be rather limited. A high pressure system will then briefly move over the area tonight.
The low level jet will dissipate after sunrise with south to southwest winds in the afternoon.
Pattern synopsis/forecast: Dry northwest flow prevails aloft, while extensive area of high pressure dominates the surface. Wave and reinforcing area of high pressure work in tandem to keep cool northerly flow in-place, with the actual low level thermal environment changing little from that which was observed yesterday.
242 AM PDT Thu Mar 22 2018 A weakening low pressure trough will interact with deep tropical moisture today to produce light to moderate rain that will sweep across the region, starting across Orange and San Bernardino Counties early in the day, then spreading south.
Quiet conditions to continue this period as dry northwest flow ahead of large upstream ridge over central CONUS continues to feed dry low to mid level air into the region. 925H temperatures warm to around 0-1C in the west so daytime temps are expected to peak a few degrees warmer today. Eastern areas should still climb into the lower 40s before the lake breeze develops.
655 AM EDT Thu Mar 22 2018 High pressure building into the western Great Lakes today will help produce VFR clear conditions across the region. An early evening wind shift back toward the north will consist of a hybrid lake breeze release/backdoor cold front working inland and south toward midnight. The high will hold over Ontario through Friday before likely strengthening this weekend while drifting eastward over Quebec.
/17/ Today through Tonight: Latest rap and satellite imagery showed an amplified ridge over the Rockies which was providing northwest flow to the region. On the surface a ridge of high pressure was centered over the Midsouth region. Expect areas of frost across the northeast and eastern counties early where some readings were approaching the lower 30s. Otherwise high pressure will bring another day of mostly sunny skies with highs a little more seasonable with readings from the lower 60s northeast to near 70 southwest. With dewpoints mainly in the 30s minimum humidity will dip down into the lower 30s.
234 AM CST Mon Jan 29 2018 The cold front is now located in Southern GA/Northern FL, but the cloud shield extends back into NE AL, where SCT to OVC cloud cover still lingers. Daytime highs will be around 10 degrees below normal in the lower 40s.
It will be mild for Monday with a cold front bringing another round of rain and snow. This will be followed by cooler, more seasonal temperatures for the rest of the work week with an active pattern of mountain snow showers in the Cascades and Idaho Panhandle. Today's warm front has largely lifted north of the area, with light precipitation still occurring north of Colville and Sandpoint. Most locations will stay above freezing tonight with areas of fog. By sunrise, rain and mountain snow will start in the Cascades, and through the day this will spread across much of the area as the cold front sweeps through the region. A cold front will sweep through the area on Monday afternoon and evening, bringing a threat of light rain to most locations.
Lgt northerly winds overnight becmg nw btwn 29/15-18z 15 to 20 kts at ktyr, kggg, and kshv, and 10 to 15 kts at ktxk,keld,kmlu, and klfk thru the aftn hours with a the passage of a weak reinforcing cold front into already dry airmass. The sfc analysis also depicts a cold front extending from near TUL to just SE of OKC, to NW of SPS, associated with the longwave trough axis extending from the Midwest SW into NW AR/Ern OK, which will drop SE into the MS Valley by daybreak Monday.
1054 PM CST Sun Jan 28 2018 A ridge of high pressure that was centered across south central Canada this afternoon, will continue to build southeast across the Upper Midwest through Monday night. Temperatures overnight are dependent on the amount of cloud cover continuing, which means if less cloud cover occurs, temperatures will be several degrees cooler than forecast. In addition to the stronger winds, increasing moisture ahead of the warm front may generate a few light snow showers.
351 AM EST Mon Jan 29 2018 Cooler temperatures are expected today. An approaching upper trough will bring cold temperatures, as well as snow tonight and into Tuesday, with mainly a light accumulation.
1236 AM EST Mon Jan 29 2018 High pressure will build north of the region overnight into Monday. Low pressure will track well east of the area Monday night into Tuesday. Higher pressure builds into northern zones, as the cold front exits the coastal region. High pressure building to our north will bring a mostly sunny and cold day across northern areas on Monday as Downeast remains partly cloudy. While low pressure is expected to track when offshore, it will be deepening as it reaches a point due east of Cape Cod and the expectation is that the precip shield will expand westward enough to hit coastal Hancock and Washington. Radiational cooling is a better possibility later Tuesday night towards the northwestern part of the forecast area when the high builds and winds decrease.
1240 AM EST Mon Jan 29 2018 High pressure will result in dry conditions today. Cooler temperatures arrive Monday. Dry weather is forecast for tonight as high pressure holds on. However, clouds will increase again late tonight as a trough encroaches on the lower Ohio Valley. and two to four along the ridges. Activity will diminish by Tuesday afternoon on the backside of the trough.
103 AM EST Mon Jan 29 2018 Low pressure near the coast tonight will move northeastward and farther away from the forecast area Monday.
400 AM CST Mon Jan 29 2018 A dry cold front continues to work its way south though the area this morning delineated by the roughly 10 degree temperature difference noted between the Lake Charles airport and DeQuincy observing stations. Temperatures this afternoon will still manage to make it into the low to mid 60's beneath a clear sky before efficient radiational cooling conditions allow them to drop quickly after sunset into the mid to upper 30s (about 5 degrees cooler than we're seeing this morning).
Cold front currently moving into the area will pass through overnight with the wind shifting around to the north. /issued 1250 PM CST Sun Jan 28 2018/ A broad and large upper level trough centered across the plains will amplify and move east into the Ohio Valley by Monday and east coast by Tuesday. The trough will send another weak and reinforcing shot of higher pressure into the forecast area tonight and Monday.
Wind chills at daybreak will average near -15 along the slightly windier portions of the Buffalo Ridge. Very cold air continues tonight as the Arctic high pressure centered over eastern North Dakota/western Minnesota slightly shifts southeast.
1149 PM EST Sun Jan 28 2018 High pressure will result in dry conditions today. Cooler temperatures arrive Monday. Dry weather is forecast for tonight as high pressure holds on. However, clouds will increase again late tonight as a trough encroaches on the lower Ohio Valley. and two to four along the ridges. Activity will diminish by Tuesday afternoon on the backside of the trough.
1133 PM CST Sun Jan 28 2018 Upper level trough axis centered near Missouri to NW Illinois and frontogenetical signature in model data from west central Missouri to Chicago suggest forecast is largely on track with light snow showers and flurries developing late this evening into the overnight period across central IL, and shifting eastward into southeast and east-central IL Monday morning. Colder dense air moving into the region this afternoon behind the cold front moving out of the state to the south. High temperatures will struggle to make it to the low to mid 30s. Temperatures do not stay up for long at all as more cold air displaces the warmer airmass Wed night.
High pressure over the western states will result in dry weather and above average temperatures for the coming week. High pressure will build across the southwest United States and Arizona today before gradually moving back to a position off the California coast later in the week. The real story will be high pressure and an associated mild air mass which will result in warming daytime temperatures across Arizona.
CKV, BNA, MQY, CSV will maintain VFR through the night with dry high pressure and generally light north winds.
Cold front now extends from far northeast Oklahoma, southwest to Okmulgee and into southwest portions of the state. The cold front is knocking on NE OK's door as of 8 PM, just pushing thru Ponca City. This boundary will move south across the region tonight, leading to a much cooler day to start the work week tomorrow.