Aikyam-Lab/Synoptic-Bench huggingface dataset:
An upper low centered over southern Saskatchewan and Manitoba will keep the area under cyclonic flow aloft with upslope flow at the surface. This, with some moisture advecting into the region will allow for a few showers and thunderstorms to develop over the higher terrain this afternoon and evening. Reinforcing shot of cooler air was sweeping through the forecast area early this morning. PoPs will be confined to the higher terrain and foothills. Freezing levels fall to around 9 thousand feet and there is a possibility of some showers over the highest elevations overnight. Will mainly confine precip chances to the higher terrain where models were keeping the best cape. Energy will rotate around the trough in place over the northern Rockies and swing into northeast Wyoming Thursday night.
1029 AM EDT WED AUG 24 2016 High pressure will prevail into this weekend. Highs will top out in the lower 90s inland while a robust afternoon sea breeze limits temps to no higher than the upper 80s closer to the coast.
Finally, the gusty west-northwest winds will keep the drier and cooler air over the FA. Cold front continuing to push east, departing the FA early this morning. In the wake of the front west winds have developed and will increase as the upper low pressure system slowly tracks east across southern Manitoba. Cooler temps today with highs in the 70s. Thursday will continue to see the influence of the upper low especially across NW MN with shower activity chances continuing, as a cool and cloudy day is expected.
1000 AM EDT WED AUG 24 2016 Expansive hi pres ridge extending from the Canadian Maritimes to the NW GOMex will generate a deep and steady NE breeze acrs central FL this aftn.
Surface analysis this evening shows a quick moving low pressure system over Wisconsin diving southeast toward NE Indiana and NRN Ohio. The remainder of the short term will be dry as high pressure noses into the area.
As a result expect the main snow area to move off around sunrise as the mid level trough/low moves off.
247 AM CST Tue Jan 31 2017 Latest sfc analysis places high pressure over central Nebraska this morning with last evening's cold front now stretched along the Missouri/Arkansas border. Aforementioned high pressure will continue drifting east today, ensuring light north winds and slightly cooler conditions as highs max out in the upper 40s to mid 50s this afternoon. As this occurs, fcst models in excellent agreement that cooler air will surge southward with time, ultimately putting a halt to the above normal temperatures we've experienced in recent days.
347 AM EST Tue Jan 31 2017 Weak high pressure gives way to the next organized system in the form of a clipper low that tracks to our south producing widespread light snowfall Tuesday night and Wednesday. The second half of the week will see a quiet period of weather under persistent northwest flow with some light snow showers mainly in the higher elevations. Ridge of high pressure moves east as the area starts Tuesday with partly cloudy skies before clouds increase through the afternoon. High temperatures for Tuesday will mainly be in the upper teens to mid 20s, while overnight lows will be in the teens while the Champlain Valley will stay in the lower 20s.
As the trough passes, a weak front will move southward overnight and likely ease through the far southern Panhandle and northern portions of the Rolling Plains on Tuesday. A cold front will move through the area late Tuesday night into Wednesday.
A nearly zonal pattern remains in place with very weak ridging in the southwest and a seasonal Hudson Bay low providing a very large and broad troughing pattern from the northern Plains to New England. Tuesday: A cold front will push across the region Tuesday night. Highs are still expected to reach the lower 50s to lower 60s with temperatures falling through the afternoon and falling sharply through the evening. Low level upslope might be enough to result in areas of low clouds/freezing fog/perhaps some light freezing drizzle along the leading edge, which would be near the Colorado/Kansas border area by Wednesday morning.
A very weak and moisture starved cold front will sag into the region today before stalling tonight.
This dryline should approach the I-35 corridor during the afternoon before being overtaken by the cold front.
242 AM MST Tue Jan 31 2017 NW flow aloft remains in place over our CWA, with a trough digging south out of British Columbia into the Pacific Northwest. Today-Wednesday: Warm front lifts back to the north this morning and we will likely see another mild day across our SW with similar air mass as last few days. A slightly cooler air mass may remain in place to our north along with mid to high clouds possibly limiting heating. There should be a clearing period before the cold front moves into the region tonight, so I was comfortable keeping milder temperatures. Low level easterly flow will bring increasing BL moisture behind the cold front late tonight, pooling along frontal zone in our west. I kept freezing fog/freezing drizzle mention in place.
Wouldn't be surprised to see the chances increase with this low QPF event expected.
153 AM EST Tue Jan 31 2017 A weak cold front crosses today with another crossing Wednesday. A warm front will quickly lift north of the area early this morning. A weak and moisture starved cold front will then push through the area today. Residual Pacific moisture will continue streaming into the area in the wake of Tuesday's front, with another cold front poised to move through Wednesday.
1026 PM CST Mon Jan 30 2017 Models in good agreement amplified ridge currently over the west coast will break down with large scale flow transitioning to near- zonal over the conus heading into this weekend. The brunt of the relatively weak cold air advection though is progged to not reach the CWA until Wednesday with highs in the low/mid 30s.
Another batch of thicker high clouds is progged to move in around mid-day on Tuesday, ahead of an approaching weak upper low moving across Mexico. /issued 305 PM CST Mon Jan 30 2017/ SHORT TERM:(Tonight through Tuesday Night): Zonal 500mb flow will continue across Deep South Texas ahead of a weakening closed low pressure system over the Baja Peninsula. At the surface, high pressure is directly overhead the southern tip of Texas and Northeast Mexico.
1201 AM EST Tue Jan 31 2017 A clipper low will move east across the lakes tuesday through Wednesday pulling a series of cold fronts across the region.
1040 PM CST Mon Jan 30 2017 A weak cold front will move through the TAF sites Tuesday morning switching the winds around to the north. /Issued 502 PM CST Mon Jan 30 2017/ Light west to northwest winds will prevail overnight and then the winds will remain light as they turn to the north behind a cold front early Tuesday morning.
Dry weather along with warming trend and benign marine High pressure over the eastern Gulf of Mexico will move eastward across the Florida Peninsula today into tonight before moving into the Western Atlantic waters on Wednesday. The high will remain nearly stationary over the western Atlantic waters while extending westward into the Florida Peninsula late this week. For much of the week the high at low and mid levels will be accompanied by nearly avg readings for this time of the year except that at low levels it will be stronger than normal with readings close to the 90th percentile per the NAEFS the latter half of the week. Consensus of the long range models show a cold front moving southward into northern Florida early this weekend before dissipating over Central Florida late this weekend.
1238 AM EST Tue Jan 31 2017 High pressure will persist into mid week.
High pressure will dominate our weather with the storm track remaining north of the area through this weekend. Water vapor imagery this morning showed troughing across the eastern CONUS with a prominent ridge in the west, centered very near 30N/120W. Southeast Arizona will remain under the influence of this area of high pressure over the next several days. Ultimately this means more of the same with regard to our sensible weather (warm temperatures and clear to mostly clear skies) as the ridge continues to slowly slide eastward.
1238 AM EST Tue Jan 31 2017 A low pressure system will move southeast across the Great Lakes tonight into Tuesday, bringing snow to the region. The highest accumulations of 3 to 5 inches are expect north of the Toll Road.
323 AM CST Tue Jan 31 2017 Still have a cut off low sitting over Baja with an upper ridge extending up the West Coast. This low will weaken as it gets swept east. The ridge will nearly flatten out late in the week as near zonal flow sets up across the country. A cold front arrives in the NE CWA Wednesday afternoon and moves through Wednesday night.
Right now satellite and radar clearly depict the dry slot behind the main first round of snow, with much warmer IR satellite readings across the dry slot. The lingering moisture will push south of the region by Tuesday night, as arctic high pressure moves into the Northland. High pressure will continue to push into the region from mid to late week, bringing somewhat below normal temperatures back into the picture for the first time in quite some time.
339 AM CST Tue Jan 31 2017 A general surface wind shift to the west will continue early today as Pacific-sourced air sweeps into the PAH forecast area to the south of a low pressure system traversing the Great Lakes. Lows Wed night are forecast to be below freezing across the entire region, though this might occur tonight in parts of southern IL.
With flow becoming more zonal and high pressure move off to the southeast, we will see a light wind through the night and milder temps than this morning. Minimum temps will generally range from around 40 well inland to the lower 50s near the coast. Surface ridging will remain draped across the the Florida peninsula into the northeast Gulf keeping surface winds from the southwest even while a cold front slowly moves southward into Central MS/AL/GA by Wednesday night. A warming trend is expected as well with highs in the lower/mid 70s and lows in the mid/upper 40s.
255 AM CST Tue Jan 31 2017 Wx map shows weak high pressure over the Eastern Gulf, with light southwest winds less than 5 mph inland, except near 10 mph across Central Louisiana where a slightly tighter pressure gradient exists.
long wave trough flattens out and the upper flow transitions to nearly zonal.
A strong mid level ridge will remain in place across the region through midweek. Valley inversions still the main story this evening as high pressure remains in place. However, the ridge has flattened a bit and will continue to do so overnight as weak disturbances ripple through the Canadian Rockies. However, these clouds are expected to mostly clear out in a few hours allowing temperatures to cool more efficiently, but overall the mins there may end up a bit warmer than last night. Visibilities and CIGS at the SLC terminal are expected to remain in the low-end MVFR to high-end IFR range through the night.
352 AM CST Tue Jan 31 2017 Under mainly light south to southwest winds early this morning, skies are clear across Southeast Texas with 3 AM temperatures ranging from the upper 40s/lower 50s inland to the lower 60s along the coast.
320 AM CST Tue Jan 31 2017 A benign weather pattern is set up across Middle Tennessee this morning, with high pressure centered over the Florida peninsula and a deep low centered over the Great Lakes. A dry air mass has settled over the Mid-State with a WSW flow at the surface, and much warmer temperatures expected today.
An upper level ridge over the southwest part of the country will result in a west-northwest flow aloft over Colorado. A cold front will back into the northeast corner of the state late Tuesday afternoon. Above the sharp frontal inversion, the air above is warmer and much drier. Based on model cross sections and soundings of temp, theta-e and rh, portions of the plains have a reasonably good chance of seeing low clouds, patchy fog and possibly some freezing drizzle form after midnight. With the best upslope moisture apparently up around the Wyoming border, the fog and freezing drizzle threat will probably be more confined to areas along the Front Range north of the Denver metro area. Meanwhile in the high country. With QPF and snow amts progged to be on the low side.
1255 AM EST Tue Jan 31 2017 An area of low pressure will move east across the southern Great Lakes tonight into Tuesday morning. After slightly warmer temperatures on Tuesday and Wednesday, generally cool conditions are expected through the rest of the week. A two-day period of slightly warmer temperatures will occur on Tuesday and Wednesday, with only low-end chances for precipitation.
343 AM CST Tue Jan 31 2017 Still have a cut off low sitting over Baja with an upper ridge extending up the West Coast. This low will weaken as it gets swept east. The ridge will nearly flatten out late in the week as near zonal flow sets up across the country. A cold front arrives in the NE CWA Wednesday afternoon and moves through Wednesday night.
1050 PM MST Mon Jan 30 2017 High pressure continues over the southwestern CONUS through midweek. Forecast challenges in the short term are limited to overnight lows in snow-covered valley locations, where guidance has continued to come in much warmer than reality.
249 AM CST Tue Jan 31 2017 There will be little change in the overall pattern for today and tonight with a blocking ridge/cutoff low across the eastern Pacific and the region being upstream of a flattening upper level ridge over the SW US. Weak CAA will follow in the wake of an H850 trough centered over the Great Lakes today, so have kept highs for today about 5-8 degrees cooler than yesterday, but still 10-15 degrees warmer than average.
Meanwhile, another cold front will push SE through the area tonight, turning the low-level flow easterly.
Overnight The light freezing drizzle over north-central Wisconsin should switch over to all snow through 1 AM. Areas along and east of the Mississippi River look to have the highest chances for seeing accumulating snow. Any blowing/drifting snow will be minimal across these areas because of the warmer temperatures melting the freshly fallen light snow today. These winds will abruptly shift to the west later this afternoon as the surface warm front moves into the forecast area. While temperatures will temporarily rise above freezing behind the warm front, a cold front will then drop south later this evening and overnight, re- freezing any melted snow on untreated roads.
336 AM CST Tue Jan 31 2017 The massive upper trough from the west conus to well off the east conus will make it very hard for any system to become progressive.
Low pressure over the upper Great Lakes will track into New York state today. A warm front will cross the Mid Atlantic by afternoon with a cold front crossing the area late today.
/issued 935 PM CST Mon Jan 30 2017/ Made minor changes to the ongoing forecast such as tweaking overnight temperatures a degree or so downward, as current thinking is despite a west-southwest light wind speed, clear skies and relatively light winds may give way to slightly cooler conditions than originally anticipated. Nonetheless, temperatures will still be warmer than recent night /30s and 40s/.
343 AM CST Tue Jan 31 2017 Low pressure has settled into southwest Lower Michigan early this morning with most of the precipitation associated with the storm occurring well north of our area and we expect that trend to continue today. with tomorrow being slightly cooler.
1131 PM CST Mon Jan 30 2017 Current forecast looks on track with a dry cold front still forecast to come through the area tonight. Latest surface map showed low pressure over central Minnesota, with an associated warm front edging into western Illinois. As the low tracks into eastern Wisconsin overnight, skies will be partly cloudy for a time in our area. The mean flow across the eastern 2/3 of the lower 48 states is not as straight west-east zonal for much of the period as suggested yesterday. Now the flow is more northwesterly, which will help keep temperatures at least a little cooler than normal much of the time.
1117 PM CST Mon Jan 30 2017 High pressure over the west-central Gulf will maintain clear skies into early Tuesday. While not red flag warning criteria, conditions are supportive of fire growth especially grass fires given the low RH. Upper level pattern is beginning to flatten but still a trough over the eastern U. and a ridge over the western U.
256 AM CST Tue Jan 31 2017 Currently temperatures were running some ten to twenty degrees warmer than this time last night. After midnight tonight increased low level moisture ahead of an approaching cold front could produce some patchy fog.
Surface wise, a formidable (1025 mb) region of high pressure is centered over the Florida peninsula with an extensive ridge reaching well west and into the adjacent coastal waters.
1131 PM CST Mon Jan 30 2017 A weak cold front will move across the area tonight, but no precipitation is expected due to lack of moisture through the column and unfavorable upper dynamics across the CWA.
Temps should continue to fall a few more degrees heading into the overnight hrs, but lows Tue morning should still be on the order of 10F or so warmer than the past few mornings, as return flow develops over the SE states. The brisk west-northwest flow across the upper Midwest and lower Great Lakes region will eventual bring a shallow cold front south into TN and north AL on Wednesday. Highs should still be quite warm on Wednesday before the cold front arrives Wednesday evening.
252 AM CST Tue Jan 31 2017 A strong low pressure system in the Great Lakes will slowly churn its way to the Northeast. As this system moves off, a couple of post frontal troughs supported by weak upper level short waves will move through the region. Tuesday night, a second trough will come through the state. As the trough passes, a high pressure ridge will begin to build into the region and will re-enforce the CAA already in place and will drop temperatures further.
840 PM PST Mon Jan 30 2017 High pressure aloft will bring fair skies and above normal temperatures into Tuesday. A low pressure system will approach by midweek for possible precipitation from Santa Barbara and northward starting Wednesday night.
Slightly higher dewpoints have moved into northern portions of the Coastal Bend with readings in the lower 50s from Port Aransas to Port Lavaca.
1028 PM MST Mon Jan 30 2017 21z surface analysis had clipper low over central MN with cold front into the southern plains.
A weak cold front will move into northern Arkansas during the overnight hours which will cause a wind shift at northern terminals. temperatures should be a bit warmer. Similar conditions are expected for Tuesday, except for slightly cooler temperatures for northern sections, as a cold front reaches this area. The cold front will continue slowly southward on Wednesday.
1131 PM CST Mon Jan 30 2017 At H5 closed low over the Northeast CONUS with trough extending into the Carolinas. Cutoff low over Baja with ridge into the Pacific northwest. A cold front is slated to push in from the north Tuesday morning across northern Nebraska, then move across southwest Nebraska during the afternoon hours.
Upper level low to our south is advecting moisture northward, but also to the east of our CWA. This low axis is expected to move east of the area on Monday, keeping the chance of precip confined to the extreme southeast portion of the CWA, including Twin Falls county. Then a southwest flow will begin to set in as another upper level trough moves in to coastal pacnw.
345 AM PDT SUN JUN 12 2016 A weak low pressure system will move inland through California maintaining a deep marine layer and below average high temperatures today.
Thermal ridging to move into the area this afternoon. Water vapor loop also indicated upper level trough over ALTA/BC/ID area. Trough forecast to move across central SASK and northern MAN this afternoon and tonight. System will send a cold front across the area tonight. Water vapor loop indicated another upper low off the southern CA coast. Trough is forecast to move into ND on Tue and bring another chance for storms.
138 AM EDT SUN JUN 12 2016 A cold front will drop through the region tonight, accompanied by isolated showers. Behind this front, cooler and breezy weather is expected on Sunday. More showers will drop southeast into central NY with a cold front and upper level short wave. Warm front is across the far ne cwa in Oneida County. Later tonight, the main surface cold front and upper-level trough sweep through from NW-SE. Surface ridging will continue to build over the northeastern states early this coming week, effectively blocking any real moisture return from the SW.
210 AM CDT SUN JUN 12 2016 During the short term phase of the forecast, we will see the high amplitude long wave ridge aloft strengthen early in the period, then begin to fill/dirty as a heat Low develops across the mid South during the latter half of the period. Looking at model sounding data, we see lapse rates from 6 to 9 C/km in the lower 6 km of the trop today. Tmrw (Mon) is a similar day, as we see the upper High aloft losing its distinction and the lower trop flow starting to establish southerlies just to our west.
455 AM EDT SUN JUN 12 2016 Cold front with showers and isolated thunderstorms today.
Forecast area remains on the front side of a slow-moving upper-level trof with its low pressure centered in southern BC. Widespread moisture streaming into MT on southwest flow ahead of the trof axis is keeping the most of our region under mostly cloudy to overcast skies, but little precip has developed so far. Temperatures will be near to a few degrees below normal on Sun/Mon as highs both days reach the high 60s to low 70s.
The synoptic pattern early this morning features a large ridge across the central CONUS. A PV anomaly sliding through the eastern Great Lakes region will help carve out a trough across the Northeast today. This will help drop a lake-enhanced cold front into the Ohio Valley today into tonight, bringing a chance of thunderstorms to the region. Dewpoints in the lower 70s will likely pool along the front this afternoon. This moisture coupled with temperatures once again in the low to mid 90s will help push heat indices towards 100 degrees. The front should make enough southward progress to provide the region with slightly cooler air on Monday and lower dewpoints.
149 AM EDT SUN JUN 12 2016 Dry and cooler weather can be expected for the start of the new week. Building high pressure under north, northwest flow aloft will ensure a dry and seasonably cool day. High pressure will rule for Monday, with dry weather and comfortable dewpoints.
330 AM MDT SUN JUN 12 2016 Current surface observations across Wyoming show a weak cold front slowly moving southward across the state and position just north of Douglas and Lusk. This front will continue to slide southward today as the upper level ridge axis will gradually weaken east of the forecast area. as the Pacific upper level trough moves into Utah and western Colorado.
A great day on tap for the region, under mostly sunny skies and high pressure. But, low pressure will move back into the region on Monday, with cooler showery weather.
332 AM EDT SUN JUN 12 2016 A cold front will move south through Pennsylvania early Sunday.
closed low off sw CA and a trough in the western U. and a ridge in the central U. trough today and moves over the ridge tonight and helps to flatten it a bit over the central U. Models suggest that a mid/upper level ridge will build over cntrl North America with a rex block developing. Expect that there will be a strong enough low level jet and theta-e advection with the prominent 850 mb theta-e ridge just to the west to support elevated tsra into Upper Michigan.