Aikyam-Lab/Synoptic-Bench huggingface dataset:
/Issued 248 PM CST Tue Dec 6 2016/ Upper trough that will aid in pushing arctic air into the region tomorrow currently swinging through the NW CONUS. Limited moisture in the lowest levels and aloft will limit precip chances tomorrow afternoon and evening to mainly northeast OK and northwest AR. but expect temperatures to remain above freezing across most of the forecast area through Wednesday afternoon.
629 PM EST Tue Dec 6 2016 A cold front is currently moving through the terminals.
A cold front that moved through the state on Tuesday will bring colder temperatures across Arizona for the next 24 hours.
For 00z Aviation discussion below Clouds, blustery winds and occasional flurries will be the norm over the next 24 hours as a deep cyclone slowly lifts east-northeast of the area. The center of the low pressure responsible for the change in weather today is located near the US/Canadian border just to the west of International Falls. The low will slowly slide to the east- northeast tonight and by sunrise tomorrow, the system will be just north of Lake Superior.
Sfc analysis places the low over eastern KY with a cold front extending southwest across the mid state. Pressure rises are fairly pronounced over our area so the cold front appears to be on the move. On Wednesday, weak thermal ridging sets up in a se-nw orientation in advance of Wednesday nights cold frontal passage. Will lean toward the slightly warmer gfs solution and go with highs in the 45 to 50 degree range, despite the broken mid/high cloud coverage.
1035 PM EST Tue Dec 6 2016 A low pressure system will exit the area tonight. High pressure will work into the area for Wednesday.
555 PM CST Tue Dec 6 2016 Cold front moving across the area will push the low cloudiness out of the area.
An upper level trough is currently spreading east across the southwestern CONUS. The trough will continue to spread east into the Plains late tonight into Wednesday then across the area Wednesday night. A cold front will sweep across the area late Wednesday afternoon into Wednesday night. Temperatures will be similar to those today as they warm into the upper 30s to the lower 40s ahead of the front. Lift will start to overspread the area ahead of the trough during the day Wednesday. Temperatures will be above freezing during this time. As the front and trough approach from the west late Wednesday afternoon/early evening, stronger lift will develop in a band with the front across southeastern Kansas into western MO.
At the surface, the cold front will continue to shift south of the region through tonight. Most models are showing this and given the low-level moisture still lingering across the area and the latest observations already showing some lower ceilings and even visibility, there is fairly high confidence that we will see some low clouds and fog late tonight into tomorrow morning.
323 PM MST Tue Dec 6 2016 Current surface analysis shows strong area of low pressure centered over northwest MN, with secondary arctic front stretching southwest to northwest Neb and WY. Upper level analysis shows the low now over northern MN. Temps range from the single digits over northwest SD to the lower 20s over far southern SD, with near or below zero wind chills across northern portions of the cwa. Mean troughing over northern NOAM will remain in place through the period with the region on the northern edge of the jet stream/storm track.
Veering of winds to the west ahead of an arctic cold front should restore VFR conditions by Wednesday afternoon. Focus late tonight turns toward prospect of low stratus and freezing fog as NAM. Leaned toward the lower end of MOS guidance given nature of this modified Cp airmass. Coldest temps within this saturation are at -10C or warmer at times, so some ice nucleation/snowflake development is possible. However, muted ascent and dry air advection should limit any of this to just light freezing drizzle and flurries before the stratus erodes from N-S Thu afternoon. Not inclined to bite on any one solution yet, but have nudged temps cooler on Sun - somewhere between the chilly GFS and unseasonably mild ECMWF.
Mainly from Bowbells and Stanley south through Beulah, Glen Ullin, Bismarck and Selfridge.
1020 PM EST Tue Dec 6 2016 Dry high pressure will briefly build across the forecast area for Wednesday.
429 PM MST Tue Dec 6 2016 Current surface analysis shows strong area of low pressure centered over northwest MN, with secondary arctic front stretching southwest to northwest Neb and WY. Upper level analysis shows the low now over northern MN. Temps range from the single digits over northwest SD to the lower 20s over far southern SD, with near or below zero wind chills across northern portions of the cwa. Mean troughing over northern NOAM will remain in place through the period with the region on the northern edge of the jet stream/storm track.
621 PM EST Tue Dec 6 2016 Low pressure is expected to spread precipitation across the region through early tonight.
The next cold front is slated to move across all terminal sites Wednesday morning into early afternoon with gusty north winds behind its passage. high pressure has settled over the northeastern Panhandle into northeastern OK and south central KS. This has kept winds on the low side generally out of the southeast. Dew point have been much lower today compared to guidance with most of the area in the low single digits. Clouds cover has also kept temperatures a bit cooler with 30s across the Panhandles as of 21z. the aforementioned mid level jet and trough axis will cross the area with a very strong arctic cold front in its wake.
756 PM EST Tue Dec 6 2016 A low pressure system will exit the area tonight. High pressure will work into the area for Wednesday.
709 PM EST Tue Dec 6 2016 Low pressure is expected to spread precipitation across the region through early tonight.
1025 PM EST Tue Dec 6 2016 After system departs tonight, high pressure will build for Wednesday.
/issued 325 PM CST Tue Dec 6 2016/ Water vapor imagery continues to show a broad trough of low pressure over the US this afternoon, with predominately west southwesterly flow aloft over the ArkLaTex. The low clouds remain relatively thick this afternoon, with only a few breaks occurring along and north of Interstate 30. Elsewhere, a very fine mist or drizzle continues to be reported periodically, with temperatures in the lower to mid 50s. As the cold front approaches the region late Wednesday and Wednesday night, we could see some measurable light rain develop.
Temperatures, currently in the 50s, are on track and should cool just a few degrees into the lower 50s/upper 40s by Wednesday morning.
534 PM EST Tue Dec 6 2016 Complex low pressure extending from the Ohio River Valley to Southeast Coast will move northeast and be mainly off the Mid- Atlantic Coast late tonight. Dry high pressure will briefly build across the forecast area for Wednesday.
658 PM EST Tue Dec 6 2016 After system departs tonight, high pressure will build for Wednesday.
A strong area of low pressure currently over northern Minnesota will slowly push east of the region through Wednesday.
955 PM CST Tue Dec 6 2016 Temperatures were adjusted slightly this evening toward cooler more quickly, but forecast minimum temperatures appear reasonable. The cold front is still expected to move north to south through Oklahoma Wednesday afternoon, so a mid-day high temperature for central Oklahoma is most likely.
A cold day has been seen even with clear skies after high pressure has pushed into the area throughout the day. Tonight, cloud cover is expected to move in from the southwest and overspread the area with temperatures dipping into the low and mid 20s. The main inhibitor will be dry air in the lower levels that will need to be overcome before snow can make it to the ground and accumulate.
Cold front has pushed east of the dvn cwa with sunny skies and brisk northwest winds gusting to 30 mph behind the front. Elsewhere, a secondary cold front was pushing towards nw IA with readings only in the single digits in the northern Plains and northern Rockies. Deepening upper low was located in northern MN with snow falling in ND and MN. Tonight: Cold air advection well underway with colder temperatures being funneled southeast around the strong low pressure situated in northern MN. Wind chills for much of the day will range from the single digits and teens north to the lower 20s south. Ambient temps are forecast in the lower to middle teens.
830 PM CST Tue Dec 6 2016 Reinforcing cold front is currently making its way ewd through the mid TN Valley, although the brunt of the colder air behind the sfc boundary is still displaced more across the Midwest region. The front has allowed a little bit of mixing in the lower levels to break up some of the very low ceilings in place across much of the area. A mostly cloudy and somewhat cooler trend is expected for the mid week as the first surge of cooler air filters in from the northwest.
525 PM CST Tue Dec 6 2016 High pressure ridging will build into the area tonight and Wednesday. Clearing line will make its way across the remainder of the forecast area this evening in the wake of a cold front pushing through the Midwest. The combination of the incoming cloudiness, dry air advecting in with the ridge, and winds remaining up around 5 kts should reduce the potential for fog tonight and keep temps mostly in the 20s overnight.
Surface wise, a western Atlantic ridge lies to our east while a decaying pre-frontal trough lies across south central Florida and into the southeast Gulf of Mexico. VFR is expected to prevail at EYW & MTH, but an approaching line of showers may cause brief MVFR CIGS/VIS, with the highest probability within the 4Z-13Z timeframe.
Cooler and drier air will be over Western Washington through Wednesday.
/issued 352 PM CST Tue Dec 6 2016/ (Today and Tonight) Low clouds and patchy drizzle have continued on and off today across much of the area behind a cold front. we are seeing drier air move in at the lower levels. As cold air advection continues in the low levels. the warmer temperatures will be brief as a strong arctic front begins to approach the area later Wednesday. Cold air is still on the way with wintry precipitation By Wednesday night, an arctic cold front will be moving through the area.
A cold front will move through the area tonight and Wednesday bringing breezy conditions to the Colorado River Valley and cooler temperatures area wide.
high pressure has settled over the northeastern Panhandle into northeastern OK and south central KS. This has kept winds on the low side generally out of the southeast. Dew point have been much lower today compared to guidance with most of the area in the low single digits. Clouds cover has also kept temperatures a bit cooler with 30s across the Panhandles as of 21z. the aforementioned mid level jet and trough axis will cross the area with a very strong arctic cold front in its wake.
Forecast on track with low clouds increasing as a weak cold front pushes through and moisture advects in underneath subsidence inversion overnight. Cooler overnight with lows in the lower to mid 50s.
Current surface analysis shows strong area of low pressure centered over northwest MN, with secondary arctic front stretching southwest to northwest Neb and WY. Upper level analysis shows the low now over northern MN. Temps range from the single digits over northwest SD to the lower 20s over far southern SD, with near or below zero wind chills across northern portions of the cwa. Mean troughing over northern NOAM will remain in place through the period with the region on the northern edge of the jet stream/storm track.
933 PM EST Tue Dec 6 2016 The cold front has just about moved through the forecast area most observations sites are now reporting NW winds. Northwest winds will remain elevated during the overnight hours and this should prevent any widespread fog formation but did add some patchy fog in SW VA and NE TN with the lower dewpoint depressions. Chattanooga Airport, TN 41 54 37 46 / 10 0 30 30 Knoxville McGhee Tyson Airport, TN 40 51 35 44 / 10 0 30 30 Oak Ridge, TN 40 52 35 44 / 10 0 30 20 Tri Cities Airport, TN 37 51 35 42 / 30 0 20 30.
842 PM EST Tue Dec 6 2016 A complex area of low pressure moves off the Mid Atlantic coast tonight with high pressure building in from the west Wednesday.
654 PM EST Tue Dec 6 2016 A trough of low pressure will clear the area this evening resulting in decreasing cloud cover overnight. Lows will dip into the lower to middle 20s.
930 PM EST Tue Dec 6 2016 Coastal low pressure will move away from the region tonight before high pressure briefly returns Wednesday.
952 PM EST Tue Dec 6 2016 Dry high pressure will briefly build across the forecast area for Wednesday.
The upper level trough axis has now shifted east of the area, and the last remaining areas of sprinkles are also quickly exiting the area this afternoon. Have included patchy fog wording across the higher elevations in the northeast due to cloud decks that could be low enough to appear as fog. But the low level stratus will hang around and be trapped in the lower levels. Another cold front will zip across Central Alabama overnight with cooling and even drier near ground air. Winds will swing around a few times as the front passes and the high pressure builds in Wednesday.
Temperatures will struggle to move much of anywhere, stuck in the 20s all day for most zones; near 20 NW to near freezing far SE.
Arctic cold front will hold off passing until just after 00Z/Thur. A cold front moving through the area has resulted in cooler temperatures today with highs only expected to be in the 40s across the northern half of the Permian Basin and into southeast New Mexico. In advance of the cold front on Wednesday, surface winds will become southwesterly then westerly allowing for compressional warming resulting in temperatures warming up into the 60s for much of the area. The cold front is expected to begin moving into the CWA Wednesday evening with brisk northeast winds behind it.
745 PM EST Tue Dec 6 2016 A complex area of low pressure moves off the Mid Atlantic coast tonight with high pressure building in from the west Wednesday.
525 PM CST Tue Dec 6 2016 Cold high pressure was located over the central plains this afternoon with low pressure over northern Minnesota.
Expect VFR conditions to continue this evening before a weak cold front moves into the area tonight. /issued 323 PM CST Tue Dec 6 2016/ SHORT TERM (Tonight through Wednesday Night):A nearly zonal flow across the southern half of the country this afternoon will allow a cold front to move into the CWA tonight before stalling. A slight chance of light rain will develop across the coastal sections of the CWA Wednesday afternoon into Wednesday evening and rain chances will increase Wed night as a stronger cold front approaches deep south TX late Wed night.
Moisture trapped under this post-frontal inversion may saturate the lower 1 km enough to allow LIFR decks to form during the pre- dawn hours. More model differences regarding potential for sct precip late Wed & Wed night ahead of the approaching strong cold front. Much of the area will see freezing temps Fri morning and Freeze Warnings will be needed for locations that haven't seen one yet.
Under partly cloudy skies, temperatures are in the lower to middle 80s.
514 PM MDT SUN SEP 18 2016 High pressure will continue to dominate the weather pattern over the forecast area in the short term with mainly clear skies through the short term period. Heights will rise slightly through Monday as the ridge of high pressure slowly builds to our east.
703 PM EDT SUN SEP 18 2016 Tropical Depression Julia will drift slowly north toward the region through mid week and interact with a slow moving cold front producing numerous showers and a few thunderstorms. High pressure will build in from the north late week. On Monday better forcing ahead of approaching upr trf and cold front will lead to numerous shra all areas with a few tsra poss. Increased pops a bit thru Wed with upper low to the SW and plenty of moisture across the area.
High pressure and dry air aloft will keep VFR conditions in place. /issued 237 PM CDT SUN SEP 18 2016/ SHORT TERM (Tonight through Monday Night): The core of an H5 ridge centered nearly overhead will shift slightly west through the short term, but its broad spread will still cover the CWA, and the mid levels will remain dry. Reinforcing high pressure will move out over the Northwest Gulf on Monday, bringing a subtle backing of winds late Mon into Mon night, through wind strength will remain light.
the remnants of the weak cold front have washed out this evening. Charlotte Ridge has reached 0. Tonight through Monday morning should be a bit cooler than this morning with some areas of cloudiness and fog mainly west of the Cascades. It should be a few degrees cooler on Monday for highs, but not much cooler.
943 PM EDT Sun Sep 18 2016 Moisture associated with weak low pressure will move east tonight.
1038 PM EDT SUN SEP 18 2016 A weak cold front moving into the forecast area will merge with low pressure off the southeast coast Monday. A trough will linger near the coast through much of the week and a chance of showers and thunderstorms will continue. Convection has been flanking the forecast area all afternoon with sea breeze convection pushing in from the east and light showers associated with an approaching upper trough arriving from the west. There should be little convergence associated with the front because of the northwest low-level flow on the backside of offshore low pressure.
Low temperatures will fall into the low to mid 70s tonight. An upper trough, currently diving east-southeastward over AR, and accompanying poorly-defined surface "cold" front, will approach our forecast area from the northwest overnight.
Looking for the winds to turn to the southwest Monday as an upper level low deepens over the Gulf of the Alaska and approaches the Pacific Northwest.
A low pressure center off the Baja coast and a high pressure center over Texas bring moisture over Arizona this week.
948 PM EDT Sun Sep 18 2016 A cold front will slowly pass through the area tonight bringing showers and scattered thunderstorms to the area. High pressure behind the front will bring dry weather for much of the rest of the week. Lrg upr low well north in Canada dvlps a broad trof over the nrn US into the ern lakes. Any effect from the trof shd remain north of the fcst area thru the pd althoughn an isltd aftn shwr psbl in the far north.
955 PM EDT SUN SEP 18 2016 A wave of low pressure will move along a stalled front along the coast later tonight and Monday.
Templer Previous Discussion - Synoptic Setup: Flow from the High Plains extending back west into the Pacific Northwest will remain zonal through most fo the short term. Hot High Pressure is building over the southwest with a large cool core trough developing over the Gulf of Alaska.
High pressure should build into the Carolinas late in the week, bringing dry weather and seasonable temperatures. High tide along the lower Cape Fear River will occur around midnight and we expect a brief period of minor coastal flooding at that time. Thus, the National Weather Service has issued a Coastal Flood Advisory til 1 am for portions of the lower Cape Fear River.
1020 PM EDT SUN SEP 18 2016 Update A weak cold front will cut across the region Monday night.
905 PM EDT Sun Sep 18 2016 Moisture associated with weak low pressure will move east tonight.
752 PM EDT SUN SEP 18 2016 A dissipating cold front will cross the area this evening. High pressure will begin to build over the region from the southwest later tonight. This high will linger over the region through Monday night.
820 PM EDT SUN SEP 18 2016 Tropical Depression Julia will drift slowly north toward the region through mid week and interact with a slow moving cold front producing numerous showers and a few thunderstorms. High pressure will build in from the north late week. On Monday better forcing ahead of approaching upr trf and cold front will lead to numerous shra all areas with a few tsra poss. Increased pops a bit thru Wed with upper low to the SW and plenty of moisture across the area.
Cloud trends are a bit tricky with low levels remaining quite moist and the clearing line still behind trough axis, a few hours away at least.
725 PM EDT SUN SEP 18 2016 A deep plume of moisture will provide for clouds and showers this afternoon into Monday until the weak upper trough moves to our east Monday. A large ridge to our southwest will slow provide above normal heights and temperatures to the region. Most of the week will be dominated by this ridge. The cell sprouted over Centre County mid afternoon and produced several funnel cloud reports as it followed the ridgelines into the Lycoming Valley this evening. The higher probability of rain/showers shifts eastward fast this forecast period and rain should end in the eastern areas.
731 PM EDT SUN SEP 18 2016 Aviation A weak cold front will cut across the region Monday night.
1107 PM EDT SUN SEP 18 2016 A deep plume of moisture will provide for clouds and showers lasting into Monday until the weak upper trough moves to our east. A large ridge to our southwest will slow provide above normal heights and temperatures to the region. Most of the week will be dominated by this ridge. The higher probability of rain/showers shifts eastward overnight.
1218 AM EDT Mon Sep 19 2016 Clouds and rain chances are expected to persist until final passage of a cold front late today. The convection-focusing front was analyzed as a semi-stationary boundary from Lake Erie, across Central Ohio, southward to the Lower Mississippi Valley this morning.
High pressure at the surface and aloft will continue to build over the next several days resulting in a typical late summertime and early fall weather pattern. With very little change in the synoptic pattern today as compared to recent days - featuring even warmer 500 hPa temps above -5 C and significant amounts of dry air in the mid and upper levels, have gone with a persistence trend in composing the forecast for the near term period, with near term model guidance likely overdoing convection for the rest of today.
By Monday afternoon, surface trof lifts north of Panhandles, allowing light southeast surface winds to resume. /Issued 246 PM CDT SUN SEP 18 2016/ An upper level ridge will build over the panhandles early this week, keep temperatures above normal.
712 PM EDT SUN SEP 18 2016 A wave of low pressure will move along a stalled front along the coast later tonight and Monday.
1225 AM EDT MON SEP 19 2016 A wave of low pressure will move along a stalled front near the coast later tonight and Monday.
855 PM MDT SUN SEP 18 2016 Cloud cover has returned to areas from Great Falls to Helena as small swath of moisture and lift works its way through central MT behind the upper-level trof that moved through the forecast area earlier this evening. Current areas of SCT-BKN clouds along/north of a KHLN-KLWT line should dissipate towards sunset as daytime heating wanes and drier air moves in behind an upper-level trough currently moving eastward through central MT. Cloud coverage will linger over southwest MT with areas of moisture ahead of the trough axis.
There will remain a low chance of a light shower along the Highway 82 corridor until midnight. For the majority of the upcoming week the forecast problem will be temperatures as convective potential will be all but eliminated with the drier air in place and broad scale subsidence associated with mid level ridging.
1025 PM EDT SUN SEP 18 2016 A deep plume of moisture will provide for clouds and showers this afternoon into Monday until the weak upper trough moves to our east Monday. A large ridge to our southwest will slow provide above normal heights and temperatures to the region. Most of the week will be dominated by this ridge. The higher probability of rain/showers shifts eastward overnight.
555 PM MDT SUN SEP 18 2016 Zonal flow early in the period will gradually back to the southwest ahead of an upper trough digging into the Pacific Northwest.