Aikyam-Lab/Synoptic-Bench huggingface dataset:
Focusing at the 700 mb level and the primary snow growth region shows the mid level trough for the nam is slower early Monday evening but then catches up with the GFS and ECMWF solution by Monday midnight. Primary period of accumulating snow expected through Monday evening as the mid level trough passes through.
348 PM PST Sun Jan 29 2017 An upper ridge was located from the coast of California northeastward toward the prairie provinces of Canada. Meanwhile at the surface, high pressure was centered over the northern Great Basin, with a second high positioned offshore from the western CONUS.
918 PM EST Sun Jan 29 2017 A weak cold front will move off the coast overnight. Weak high pressure will build over the region Monday night.
750 PM EST Sun Jan 29 2017 A cold front will move across the region tonight with a ridge of high pressure building east across the region on Monday.
Expect dry weather under high pressure through Thursday. Unseasonable warm and dry weather will peak today across the area as a large scale ridge axis moves over the four corners Thursday. Expected temperatures to climb well above seasonal averages for this time of year with the highest temperatures likely to occur today across the region. The ridge will slowly move eastward with its axis expected to be over the panhandle of Texas around midday Friday.
400 AM MDT Thu Oct 27 2016 Warm and dry conditions will be in place today under a building ridge of high pressure. The ridge will be shifting east tonight with increasing southwest flow on Friday. Plenty of high level moisture working through the ridge will send thin blanket of cirrus overhead, helping to knock a degree or two off what otherwise will be record or near record warmth.
This ridge should make its way far enough east to preclude us from much fog, but I am the most concerned with our northeast corner that held on to stratus a bit longer than the rest until about noon to 1 pm, so this could be a factor. Heading into Thursday, upper level ridging will ensure warmer than normal temperatures. For Friday, upper level ridging will ensure warmer than normal temperatures, but highs in the lower 80s expected for much of the CWA Friday, which should wind up being our warmest day of the forecast.
421 AM EDT Thu Oct 27 2016 Low pressure will bring rain to the region today. Warmer but unsettled weather is anticipated for the weekend. Surface cold front will slowly move through the area today. Cold advection behind the departing low pressure will be brief, but shower chances will continue tonight, mainly over the north and east. Some snow may mix in as well, especially north of I-80 and in the high terrain. High pressure will settle over the Ohio Valley Friday, with decreasing cloud cover as warm air advection ensures.
Light southeasterly winds will become more northeasterly overnight as a weak inverted trough approaches the region.
Radiational cooling along the northern tier of counties had allowed temperatures to drop into the lower 30s. UPDATE For the early evening update, expanded fog wording a bit in aerial coverage and developed sooner based on observations and the last few hours of the high res model guidance, which indicates fog developing after sunset for all but the southwest initially. A warm front extended across central North Dakota.
Tonight, although the models have trended slower and weaker with the pcpn advancing into the region, expect at least some light pcpn over most of the cwa with the highest pops/amounts remaining over the south and only chance pops over the Keweenaw. Thursday, With the mid-level trough axis beginning to moving off to the east, any lingering light rain/snow showers over the east half in the morning will end by afternoon as ridging and q-vector div/subsidence build in from the west.
This corridor develops across eastern MS and western AL spreading northeast through northern AL into southern middle TN Thursday morning as an upper trof approaches. A cold front will be lagging behind as has been indicated in previous model runs. Little airmass change for our area is now foreseen through this process, although slightly drier air may advect into our eastern counties equating to cooler overnight lows than further west.
Upper level ridge centered over the forecast area this morning being overrun by a strong plume of moisture in advance of a splitting trof along the Pacific Coast. On Friday a weak front slides through the area from the northwest but which brings cooler temperatures primarily by cutting off the downslope low level flow. The moisture increases over the area as the the southern portion of the trough moves through the Great Basin and it begins to tap into some moisture from Hurricane Seymour.
347 AM CDT THU OCT 27 2016 (Today and Tonight) An upper level trough that pushed a weak front into the area yesterday has moved off to the east. Upper level ridging will expand from the southwest back into our area.
302 AM CDT Thu Oct 27 2016 The cold front is just entering our far northwest counties as of 08Z. The main issue for today is how long the low stratus will linger over the area behind the front. As a result went on the lower end of guidance for highs today.
Only areas of sunshine may occur along the lee of the Buffalo Ridge, but the wind direction is not conducive for a downslope component. Afternoon temperatures reflect the anticipated persistent clouds with readings in the 40s in west central Wisconsin, to the low to mid 50s across central and southern Minnesota, with near 60 along the Buffalo Ridge. However, breezy conditions will lead to nearly steady temperatures overnight, with rising temperatures possible along the lee of the Buffalo Ridge.
A mild southwest flow ahead of incoming Pacific storm system will bring another mild day to the region with highs in the mid 60s to the lower 70s. The airmass is fairly warm with high snow levels so accumulation will only be possible on the highest peaks however the accumulation may be several inches.
640 AM EDT Thu Oct 27 2016 Cold front crosses Thursday with showers.
Temperatures should warm up an additional degree or so from yesterday into the mid to upper 80s given reduced cloudiness, which should also allow low temperatures tomorrow morning to be a few degrees cooler than this morning in the upper 50s and lower 60s. The ridge will become centered over South Central Texas on Friday as it begins to weaken, allowing high temperatures to be similar to where they will be today.
A record setting weather pattern will continue across the Mid- South over the next seven days as an upper level ridge builds over the southern United States. Highs will generally be in the low to mid 80s, with lows in the 50s and 60s. AC3 06Z TAF Set A band of light rain ahead of a cold front will move into KMEM shortly and KMKL over the next 1-2 hours.
543 AM EDT Thu Oct 27 2016 Low pressure over southern Michigan early this morning will track across Lake Ontario this afternoon. Milder weather will occur this weekend, as high pressure builds across the southeast states. A weak cold front from the upper Great Lakes may bring a chance of showers to the area for the later part of the weekend. As the low moves across the eastern part of Lake Ontario later this afternoon, that winds will shift more to the west, and the rain will taper to just a few showers. Downstream blocking should allow northern stream energy to phase with the lead trough and eventually result in a negatively tilted trough over the Northeast U.
A cold front will push isolated to widely scattered showers and occasional mountain obscurations along and north of a KJAC-KCOD line 06z-12z Friday. Increasing ridgetop winds may also result in areas of LLWS developing along the east slopes of the Continental Divide, vicinity KLND-KDUB-KCOD. A cold front will push east across Montana Thursday evening, with winds expected to diminish across central Wyoming. Tonight Through Thursday Dry high pressure will be over the area tonight and Thursday with a stable air mass over the area.
328 AM CDT Thu Oct 27 2016 Upper level ridging is building into the region this morning.
230 AM MDT Thu Oct 27 2016 An upper level ridge will be over the area today with dry wsw flow aloft. At the sfc a lee trough will dvlp over east of the mtns. A ridge of high pressure will be centered over Texas on Friday as a weak upper trough moves into the central CA coast.
258 AM EDT Thu Oct 27 2016 Cloudy skies and cool temperatures expected today as low pressure lifts out across the eastern Great Lakes. Cold front associated with sw disturbance cutting through nrn lower MI lagging back across ne IL/nw IN yet will accelerate ewd through daybreak as system lifts out through the ern lakes. Prefrontal trough still continues to drive sct shower development over ern third of CWA although with a diminishing trend as low level jet and attendant moisture flux shift east out of nw OH by daybreak. Otherwise shallow but intense low level cold advection wing to shift se behind departing sfc cyclone this morning.
225 AM EDT Thu Oct 27 2016 Cold front crosses Thursday with showers.
647 AM EDT Thu Oct 27 2016 Cloudy skies and cool temperatures expected today as low pressure lifts out across the eastern Great Lakes. Cold front associated with sw disturbance cutting through nrn lower MI lagging back across ne IL/nw IN yet will accelerate ewd through daybreak as system lifts out through the ern lakes. Prefrontal trough still continues to drive sct shower development over ern third of CWA although with a diminishing trend as low level jet and attendant moisture flux shift east out of nw OH by daybreak. Otherwise shallow but intense low level cold advection wing to shift se behind departing sfc cyclone this morning. Northwest winds in the 10 to 15 knot range are expected today with winds diminishing to light and variable tonight as low level ridge axis settles across the region.
247 AM CDT Thu Oct 27 2016 An upper level ridge across the southwestern US will gradually shift east into the southern high plains Tonight. The high clouds moving southeast across the CWA at 200 AM should begin to Thin out after 400 AM and the patchy dense ground fog should increase in coverage across northeast and east central KS towards sunrise. Highs Today will reach the lower to mid 70s across northeast and east central KS, with mid to upper 70s across the western counties of the CWA.
The cooler air mass will be well in place Thu night, with lows closer to climo.
A quick update late this evening to slow the progression of the cold front tomorrow. /SVH 06Z TAFS: Much of rainfall associated with the warm front has moved out of the area to the north. The trailing cold front will be very slow moving and likely not cross east of the Cascades until Thursday afternoon.
423 AM EDT Thu Oct 27 2016 Low pressure will bring rain to the region today. Warmer but unsettled weather is anticipated for the weekend. Surface cold front will slowly move through the area today. Cold advection behind the departing low pressure will be brief, but shower chances will continue tonight, mainly over the north and east. Some snow may mix in as well, especially north of I-80 and in the high terrain. High pressure will settle over the Ohio Valley Friday, with decreasing cloud cover as warm air advection ensures.
435 AM EDT Thu Oct 27 2016 Low pressure over southern Michigan early this morning will track across Lake Ontario this afternoon. Milder weather will occur this weekend, as high pressure builds across the southeast states. A weak cold front from the upper Great Lakes may bring a chance of showers to the area for the later part of the weekend. As the low moves across the eastern part of Lake Ontario later this afternoon, that winds will shift more to the west, and the rain will taper to just a few showers. Downstream blocking should allow northern stream energy to phase with the lead trough and eventually result in a negatively tilted trough over the Northeast U.
151 AM EDT Thu Oct 27 2016 Cold front crosses Thursday with showers.
148 AM EDT Thu Oct 27 2016 Low pressure over northern Illinois will move east across northern Indiana and northwest Ohio overnight. Skies will remain mostly cloudy Thursday as the low moves east across Lake Erie and high pressure approaches from the west.
303 AM MDT Thu Oct 27 2016 Strong upper ridge will remain across the region today as the main axis crosses the CWA. In the low levels. southwest flow will today will bring warmer temps to the area along with dry conditions. Cooler air will gradually filter into the region through the day Friday with highs ranging from the mid 60s across northeast Wyoming to around 80 across south central South Dakota. A stronger cold front will approach from the north while an upper wave crosses Wyoming. The highest elevations of the Black Hills may see it transition to snow late Friday night. mean eastern pac troughing will support active/progressive sw flow over the region through the period, with split flow tendencies.
Upper air analysis this morning showed a ridge from Baja California to the northern Rockies with northwesterly flow over Texas. During this period, the upper level ridge will shift to the east keeping the weather dry.
A cold front will cross the area this evening. High pressure then builds over the area tonight through Friday night.
Few showers and thunderstorms shown by radar over the near coastal waters associated with weak a westward advancing surface trof. Isolated showers shown over northeast Louisiana into Mississippi aligned along mid/upper trof axis advancing east. This a result of the aforementioned features including including low level gulf boundary and inland upper troffing. Features exiting today will conclude any rain chances into the new week as broad and dry high pressure expands across the area while active weather remains deep into the gulf waters. A weak trof of low pressure advancing west across the northwest gulf will bring a chance for a few showers and thunderstorms today. Otherwise strong high pressure ridging across the southeast conus and adjacent gulf waters will maintain a lengthy and moderate easterly fetch with elevated seas resulting and holding into the new week.
109 AM EDT Thu Oct 27 2016 A weak cold front will push through the forecast area today. Have not mentioned SHRA in the TAfs given the low probabilities.
449 AM MDT Thu Oct 27 2016 An upper level ridge will be over the state today and will keep the weather dry and warm. High temps today will be well above average, with upper 70s to lower 80s along the I-25 corridor, lower to mid 80s across the southeast plains and upper 60s in the high valleys.
302 AM EDT Thu Oct 27 2016 Cold front crosses Thursday with showers.
27/06Z TAF CYCLE Upr lvl trof wl cont to shift E of the area today wl lingering rain chcs diminishing ovr ERN AR. /44/ Main concerns in this forecast cycle are chances of rain with the current upper system and cold front affecting the region. The cold front is located in eastern OK to western MO, while the upper system has made progress to western AR to central MO. Thursday to Friday, surface and upper high pressure systems again build in over the region, and bring dry weather and warming temperatures.
A weak frontal boundary and short wave trough were causing some storms along the Red River and should remain in north Texas. Tomorrow should be a repeat of today with high temperatures back into the mid 80s after lows in the low 60s/upper 50s.
343 AM CDT Thu Oct 27 2016 Current GOES IR imagery showing the region engulfed in widespread stratus in the wake of low pressure over northern Indiana. GOES cloud thickness product indicating this stratus varying from 800- 1200ft thick, so not expecting any clearing overnight as a ridge of high pressure builds overhead by daybreak. With anticipated cloud cover, temperatures will suffer some with highs ranging from the middle and upper 40s along and northeast of I-94 to the lower/middle 50s elsewhere. Southerly winds pick up through the night tonight as low pressure moves into the Dakotas.
Upper level ridge and thermal ridge will be over Eastern Montana today. Mid and upper level moisture moving over the ridge will continue to bring cloud cover although there will be breaks at times today. The ridge axis moves to the east this evening turning the flow aloft to the southwest. Cooler and mainly dry weather will prevail on Friday with Northeast Montana between system.
A deep layered ridge centered over the South Atlantic Bight supports expansive high pressure across the extreme eastern United States and the western North Atlantic. Temperatures are in the lower to mid 70s with dewpoints near 70. Mean layer analyses from CIMSS place a long wave trough complex deep into the tropics, bisecting southern Mexico. Water vapor and infrared satellite imagery highlight the expansive leaf-like cloud shield to the east of this upper level trough. Deep convection has remained near the core of the trough and well to the west of coastal waters of the Florida Keys.
Strong high pressure building over the region will lead to warming temperatures through the end of this week with record highs possible at some locations on Thursday. Latest streamline analysis shows an anticyclone in the eastern Pacific with a ridge axis extending northward through Sonora and into the Desert Southwest. Global models are indicating copious amounts of upper-level moisture will be transported into Southwest in the return flow around the eastward-advancing ridge. Minor adjustments were made to the high temperatures in these areas. By Thursday night, an Pacific low pressure trough reaches the California coast helping to displace the upper level ridge eastward over New Mexico and Texas. This trough will drop our heights aloft (500mb heights of 582-585dm), leading to a 2-5 degree drop in highs for Friday.
256 AM EDT Thu Oct 27 2016 A narrow ridge of high pressure will slide off to the east today. Low pressure will slowly move east through the region tonight and Friday, bringing rain for most of the region with snow at the highest elevations.
The mid-level trough was progressing east of the area with a mid- level ridge stretching across the western U. This fog should dissipate by mid morning as conditions dry out in the low-levels with increased mixing.
330 AM CDT THU OCT 27 2016 The cold front that brought the showers/storms to central and southeast Illinois in the past 24 hours has just about exited our far southeast counties. Cyclonic flow and low level cold advection is expected to persist across the region for much of the day, but a progressive ridge of high pressure will shift across the region late today into tonight. Clearing should finally occur late in the day as the high pressure builds in.
332 AM CDT Thu Oct 27 2016 Upper level ridge centered over Chihuahua will continue to edge northeastward toward our part of the state. Some high level cloudiness is making its way across the northern periphery of the high thanks to T. Despite the proximity of the high, temperatures will not get too crazy warm though they will be about 10-15 degrees above seasonal norms.
248 AM MST THU OCT 27 2016 Strong high pressure over the region will lead near record temperatures today. A weather system moving through California on Friday will bring a chance of showers to southeast California along with slightly cooler temperatures. An unseasonably strong ridge of high pressure over the Desert Southwest has led to 500mb heights reaching 590dm (97-99% of climo) and 850mb of 22-24C over south-central and southeast Arizona. Looking upstream, a fast moving upper level low approaches California. The cirrus should stay thin enough not to impact temperatures today across the eastern half of Arizona, but may keep temperatures a degree or two cooler than previously forecast across southeast California and southwest Arizona. Heights aloft will drop across the Desert Southwest as the trough passes through California leading to a cooler day on Friday.
The surface reflection of the trough, a cold front, is presently sweeping southeast through eastern Kansas and Missouri; currently along a line from Kansas City to Kirksville. Despite the cold front sweeping southeast today, we expect neither more rain or even cold temperatures thanks to the ridge to our west. The ridge placement will keep the storm track well to our north through the weekend into the middle of next work week. Friday might be the warmest day thanks to the sunshine and south winds ahead of another front that will have formed across the northern Plains, helping boost afternoon highs into the low 80s.
151 AM EDT Thu Oct 27 2016 Aviation A low pressure system moving east across the Great Lakes region will continue to bring rain through this evening and mixed rain and snow north of interstate 96.
Issued by National Weather Service Gray ME 131 AM EDT Thu Oct 27 2016 Weak high pressure will nose into the region from Canada today. Low pressure will move out of southern New England toward the area late tonight with precipitation developing from south to north.
H5 ridge to the west will support stability today, however, patchy mid valley fog and low clouds will be possible before dawn, supporting low certainty and brief MVFR conditions at MFE. Expect VFR conditions to continue for the next 24 hours as the 500mb ridge across northern Mexico and the southwest United States provides subsidence across the region. /issued 252 PM CDT Wed Oct 26 2016/ SHORT TERM (Tonight through Thursday Night): 500mb ridge across northern Mexico into the southwest United States will continue to provide subsidence across the CWA tonight into Thursday. A 500mb inverted trough/low is expected to move into the Bay of Campeche and the southwest Gulf of Mexico Thursday into Thurs night.
232 AM CDT Thu Oct 27 2016 Upper trough is currently working its way across the MS/OH River Valleys, and weak radar echoes are lined up pretty well with the trough axis. Another ridge will move in behind the trough for the remainder of the work week and into the weekend.
Quiet tonight with steady sw winds as low pressure moves over the Northern Plains. Coolest temps tonight will be over far east where it could dip blo freezing. Temps above freezing elsewhere with winds keeping the temps up.
151 AM EDT Thu Oct 27 2016 A low pressure system pushing across across northern Ohio will bring showers and possibly a thunderstorm tonight into Thursday morning. High pressure and dry weather to return for Thursday night and Friday. Prev Discussion-> The best isentropic lift has lifted north of the area, with the warm frontal boundary currently lifting north through the forecast area. The prefrontal cold front precipitation over NW Indiana pushing east more slowly than previously forecast and generally a bit slower than mesoscale models. High pressure to push in Thursday night with partial clearing.
158 AM EDT Thu Oct 27 2016 Low pressure over Illinois will move east and cross Lake Erie Thursday dragging a cold front across the area Thursday morning. High Pressure will slide across the Ohio Valley on Friday. Another low pressure system will cross the Great Lakes over the weekend. Warmer air a little slower moving into forecast area so lower overnight temps a couple of degrees in the East. Better chance for showers later tonight as warm advection continues and the low level jet moves overhead. High pressure will build across the area quickly on Friday with winds backing to the southwest. With any luck we can get some sunshine between the low clouds and the increasing high clouds.
124 AM EDT Thu Oct 27 2016 Low pressure will bring rain to the region today. Warmer but unsettled weather is anticipated for the weekend. Expect the lower levels to final moisten late tonight as the flow shifts to the south-southeast. Cold advection behind the departing low pressure will be brief, but shower chances should continue through tonight, mainly over the north and east. Some snow may mix in as well, especially north of I-80 and in the high terrain. High pressure will settle over the Ohio Valley Friday, with decreasing cloud cover as warm air advection ensures.
245 PM EST Sat Mar 11 2017 High pressure with chilly arctic air into Sunday.