Aikyam-Lab/Synoptic-Bench huggingface dataset:
Latest surface observations indicate cold front draped across the Nature Coast continuing its gradual push down the peninsula. Temperatures in the wake of the front will be noticeably cooler. as high pressure building into the region ushers a cold/dry continental air mass into the state for the first half of the week. generally 10 to 15 degrees cooler than highs this afternoon. Even cooler temperatures expected beyond Monday, and future trends will continue to be monitored for the potential of freezing conditions across far northern locations and wind chill concerns spanning areas further south during the first half of the week before the air mass modifies a bit and warmer conditions return during the latter half of the week. Winds at KTPA and KPIE have shifted to northwest, with remaining terminals shifting north/northwest between 02-06Z as cold front pushes across area.
A Canadian dome of high pressure will press slowly southeast into the Plains and upper Midwest by Monday morning, bringing the colder temperatures farther south. A weak, moisture starved, mid/upper level trof will drop southeast toward through the Plains and into the mid MS River Valley Monday afternoon/evening.
A weak upper ridge will give way to a weak front on Monday.
458 PM EST Sun Jan 19 2020 Low pressure will exit across the Maritimes tonight.
912 PM EST Sun Jan 19 2020 Chilly and dry high pressure will build in from the northwest and north behind a cold front late today through the middle of this week. Lows tonight in the lower to mid 20s, with a steady northerly breeze of 8 to 12 mph yielding wind chills in the lower to mid teens. The high pressure over South Dakota will dominate the eastern half of the country on Monday and later into the week. A weak upper level trough will drop from Minnesota south to Georgia during the same 24 hour period, but with so little moisture present, it should do little more than cause a passing high cloud or two.
Strong arctic high pressure over the northern Plains and southern Canadian prairie Provinces will continue to drift south/southeast across the central Plains through the next couple of days. Aloft, an amplified ridge extends from the southwestern CONUS and into western Canada. A stratus deck is forecast to move into portions of the area which could keep temperatures a bit warmer overnight so some areas in the advisory may not quite reach criteria, but again, it will be close.
544 PM CST Sun Jan 19 2020 VFR conditions will continue through the 00Z TAF cycle, as high pressure continues to build in at the sfc. Otherwise, slightly colder temperatures expected on Monday night with lows forecast to fall into the mid 20s across southeast Oklahoma, southwest Arkansas and portions of north Louisiana with slightly warmer near freezing temperatures across east and northeast Texas.
Low temperatures will be cold tonight ranging from the lower 20s in the north and mid to high 20s in the south and with the help of some light winds, wind chills could range anywhere between 15-25F. A persistent mid-level height gradient between a ridge over the Rockies and trough over the eastern CONUS will keep winds thoroughly mixed through the atmosphere as well.
A short-lived, weak ridge of high pressure has moved over the Northern Rockies and clear skies have developed for most of the region (with the exception of northwest Montana). Moisture is expected to ride over the ridge, increasing high clouds later this evening. As the ridge of high pressure slides off to the east by Monday afternoon, a weak wave will move over central Idaho.
Winds have begun to diminish over the area this afternoon as high pressure settles in. While this leads to a beautiful day today, tonight's temperatures will be cooler than last night with lows dipping into the mid 30s to low 40s. Some of the northern counties could briefly reach freezing, though this is not expected to be widespread or long lasting. Temperatures will only warm into the low to mid 60s. Temperatures will warm slightly Monday night with lows in the low the mid 40s.
336 PM MST Sun Jan 19 2020 Latest satellite and upper air analysis show a ridge over the Rockies with dry northwest flow onto the Plains. A backdoor cold front was near Highway 83. Tonight lows should be a few degrees warmer than last night east of the cold front due to weak WAA/moisture advection occurring. Monday light winds will continue as a ridge at 850mb moves over the forecast area. During the afternoon the backdoor cold front will advance further west into the forecast area, close to Highway 25, in response to the closed low moving south over the Missouri River Valley. Due to dry air in place, and the short wave ridge moving overhead, little if any cloud cover is expected along the front. Monday night the cold front will continue advancing west until midnight to roughly the CO/KS border.
Otherwise, slightly colder temperatures expected on Monday night with lows forecast to fall into the mid 20s across southeast Oklahoma, southwest Arkansas and portions of north Louisiana with slightly warmer near freezing temperatures across east and northeast Texas.
422 PM MST Sun Jan 19 2020 Northwesterly flow aloft continues over the forecast area as an upper ridge builds to the west. At the surface, high pressure remains over much of the Dakotas. On Monday the upper ridge will slide across the northern plains with WAA continuing.
Dry and warmer conditions continue today with gusty offshore winds over eastern Ventura and northern Los Angeles Counties.
/issued 335 PM CST Sun Jan 19 2020/ A cold Canadian high pressure system will be in control of the sensible weather for the next few days with cool days and very chilly nights.
Although the low level moisture will be quite limited with surface ridging over the region, it appears that there will be light snow and flurries ahead of this feature across parts of our forecast area from late Monday morning into early Monday evening. Most of the models continue to depict the highest QPF, albeit light over central MO Monday afternoon.
324 PM CST Sun Jan 19 2020 Shallow cold high pressure will continue to move southward into the central plains through Monday, with warmer air on the high plains. The coolest air will be in central Kansas with highs in the lower to mid 30s for Monday, with warmer 40s and 50s in far western Kansas. Tonight and Monday night will be cold with teens across most of the area, and warmer 20s in the far southwestern corner of Kansas.
335 PM CST Sun Jan 19 2020 A cold Canadian high pressure system will be in control of the sensible weather for the next few days with cool days and very chilly nights.
Cold front has about completely passed through the forecast area as of 2pm ET. A few light showers on ongoing behind the cold front, but even these are quickly clearing the southeast Big Bend as they move east. Expect much colder conditions tonight with widespread temperatures around freezing across the Panhandle and SE Big Bend with colder temperatures in the upper 20s in our Alabama and Georgia counties.
905 PM EST Sun Jan 19 2020 The cold front is closing in on northern Lake and Volusia counties currently and will sweep south across the forecast area overnight. Cold front will move across the waters tonight with Advisories starting across the nrn marine areas into late evening, the central zones by midnight and srn waters at 3 am.
325 PM CST Sun Jan 19 2020 A backdoor cold front will continue to move southwestward tonight. The cold front will stall tomorrow morning across southwest Oklahoma.
230 PM MST Sun Jan 19 2020 Latest satellite and upper air analysis show a ridge over the Rockies with dry northwest flow onto the Plains. A backdoor cold front was near Highway 83. Tonight lows should be a few degrees warmer than last night east of the cold front due to weak WAA/moisture advection occurring. Monday light winds will continue as a ridge at 850mb moves over the forecast area. During the afternoon the backdoor cold front will advance further west into the forecast area, close to Highway 25, in response to the closed low moving south over the Missouri River Valley. Due to dry air in place, and the short wave ridge moving overhead, little if any cloud cover is expected along the front. Monday night the cold front will continue advancing west until midnight to roughly the CO/KS border.
337 PM CST Sun Jan 19 2020 Cold high pressure firmly entrenched over large part of the country with clear skies and optimal radiational conditions for tonight.
High pressure building into the Southern Plains will result in a light wind tonight through much of Monday. Backdoor cold front moves through the area late Monday afternoon and evening.
654 PM EST Sun Jan 19 2020 Cold temperatures and scattered to numerous snow showers will continue into early Monday with a reinforcing cold front.
640 PM EST Sun Jan 19 2020 High pressure is building in across the central Great Lakes region. As the boundary layer cools inland during the evening, the low level flow should back a little more northwesterly, forcing the better snow showers out into Lake Huron and Sarnia, Ont.
314 PM MST Sun Jan 19 2020 Upper ridge approaching from the west is sending another wave of high cloudiness across southern Colorado associated with an embedded northwesterly upper jet. This should push south and east of the area overnight as ridge axis shifts eastward allowing for clearing skies and another cold night across the region. Temperatures at KALS have broken the freezing mark this afternoon and with a little snow melt beneath an inversion layer, suspect that shallow patchy ground fog will develop late tonight through early Monday morning. Monday will be warmer with continued light winds as the ridge axis aloft translates towards the eastern CO border.
However, thin cirrus moving through a mid-level high pressure trough to the west continued to stream southeastward over the southern half of the forecast area. A mid-level trough over the eastern Pacific approaches the West Coast tonight driving the previously mentioned ridge eastward bringing its axis over the region by morning. Cirrus will fill in on the western side of the ridge ahead of the eastward propagating trough overspreading the north on Monday.
735 PM EST Sun Jan 19 2020 High pressure will slowly build into the area through mid week.
As high pressure moves in on Monday clouds should slowly scatter out.
Shallow cold high pressure will continue to move southward into the central plains through Monday, with warmer air on the high plains. The coolest air will be in central Kansas with highs in the lower to mid 30s for Monday, with warmer 40s and 50s in far western Kansas. Tonight and Monday night will be cold with teens across most of the area, and warmer 20s in the far southwestern corner of Kansas.
650 PM EST Sun Jan 19 2020 Dry air will filter into the region tonight with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
A persistent mid-level height gradient between a ridge over the Rockies and trough over the eastern CONUS will keep winds thoroughly mixed through the atmosphere as well.
A few spots in the high mountain valleys should drop below -20F. On Monday, the upper level ridge will build over the state with warm advection aloft. There will be a cirrus shield working this way which may limit heating a bit, but most of this should be of the thin variety ahead of the sharp ridge axis. Therefore, we should see highs reach the lower 50s in Denver and the Palmer Divide, and mid to upper 40s over the plains.
The upper level trough axis will continue to move over the region this evening and has resulted in an enhancement of some very light snow across the local area. The upper trough axis will move off to the east overnight and the snow will diminish with cloud cover also decreasing as the low level flow shifts more to the north as ridging builds as the surface and heights begin to rise aloft.
/issued 325 PM CST Sun Jan 19 2020/ A backdoor cold front will continue to move southwestward tonight. The cold front will stall tomorrow morning across southwest Oklahoma.
601 PM EST Sun Jan 19 2020 Dry air will filter into the region tonight with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
A very cold and expansive area of high pressure continues its grip on the central plains today as brisk northerly winds sustain near 10 mph.
High pressure building over the region should keep conditions dry through the beginning of the week.
1020 PM EST Sun Jan 19 2020 Dry air will filter into the region tonight with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
1117 PM CST Sun Jan 19 2020 1043mb arctic high pressure centered over Saskatchewan will build south and be located over Missouri Tuesday morning.
Latest surface observations indicate cold front draped across the Nature Coast continuing its gradual push down the peninsula. Temperatures in the wake of the front will be noticeably cooler. as high pressure building into the region ushers a cold/dry continental air mass into the state for the first half of the week. generally 10 to 15 degrees cooler than highs this afternoon. Even cooler temperatures expected beyond Monday, and future trends will continue to be monitored for the potential of freezing conditions across far northern locations and wind chill concerns spanning areas further south during the first half of the week before the air mass modifies a bit and warmer conditions return during the latter half of the week.
The extra cloud cover may keep temps a bit cooler, but highs were not going to be warm by any means regardless. Highs today will be in the low to mid 30s. Cloud cover has kept temps slightly warmer than previously forecasted, but winds are still around 10 mph for most areas, which is driving wind chills into the single digits. Bundle up if you're heading out this morning! Strong upper low still looks to move southward this evening, bringing additional chances for flurries mainly along the TN River Valley and southern areas this evening and overnight. By sunrise Tuesday, the upper trough will be off to the southeast, and ridging will try to build its way in.
Tonight a short wave trough will drop southeast into our area, but this system will be moisture starved and should just bring an increase in clouds.
Ongoing cold advection trends will continue until early Tuesday, and with snow pack still present across northern Missouri, overnight lows will dip into the low negatives for the northern counties.
357 AM EST Mon Jan 20 2020 Lake effect snow showers will diminish this morning as a ridge of high pressure builds in from the west. This high will dominate the weather through the week, with quiet and cold conditions for the start of the new work week, but a gradual warm up by mid to late week. High pressure is building into the region this morning and this will bring an end to the lake effect snow showers. Surface ridging stays in place Tuesday, however a weak short wave will pass by to our north late Tuesday afternoon and into Tuesday evening. High pressure building across NY and PA will bring quiet weather and progressively milder days.
If conditions trend cooler, then cannot rule out an issuance in future updates. Still enough forcing/moisture to continue mention of scattered flurries possible in the NW part of the CWA but not expecting any accumulations/impacts as any flurries may struggle against evaporation in the lower level. At the same time, high pressure will continue to filter in at the surface.
The upper level trough axis will continue to move over the region and has resulted in an enhancement of some light snow across portions of the local area. The upper trough axis will move off to the east overnight and the snow will diminish with cloud cover also decreasing as the low level flow shifts more to the north as ridging builds as the surface and heights begin to rise aloft. High pressure gradually builds in from the west as one more piece of upper energy tracks through northern New England and SE Canada by Tuesday along the leading edge of upper ridging that will build into our region beyond Tuesday. Upper ridging builds into our region as low level ridging begins to build east.
307 AM EST Mon Jan 20 2020 Snow should end today as high pressure builds in.
Light winds will persist in the vicinity of the high pressure and will allow for another morning of cool temperatures. This short wave trough, which models have been advertising in some form or another for the past few days, has trended farther north in the latest runs. Preceding all of this, a cold front will attempt to back door into the area. Winds in the Rolling Plains may likely turn more to the southeast keeping slightly cooler conditions in this area.
Our next opportunity for widespread precipitation will be Tuesday with a mix of rain and snow in the lowlands and light to moderate accumulations in the mountains. Upper air analysis shows the inland northwest under a weak transient ridge this evening which has provided just a bit of clearing.
Expect the stratus deck to gradually clear out after daybreak, however, continued cold advection will keep high temperatures today in the low 30s, with most areas struggling to reach above freezing. With the strong Canadian high pressure in place at the surface, expect the only impacts from this passing wave to be an increase in mid-level clouds.
1133 PM EST Sun Jan 19 2020 Cold temperatures and scattered to numerous snow showers will continue into early Monday with a reinforcing cold front.
A compact upper-level ridge will move through Tuesday, and the tight surface pressure gradient will begin to usher in more mild air.
1109 PM EST Sun Jan 19 2020 An upper level trough will swing through the northeast CONUS early in the upcoming week. High pressure will then settle over the region for the second half of the week bringing perhaps the coldest air of the season.
But, the higher elevations in the northeast probably will achieve some healthy gusts. That said, we are still forecasting highs for Tuesday on the high end of the model spread. Even through temperatures warm on Tuesday, will maintain patchy blowing snow over the higher terrain areas of the Prairie Coteau.
/issued 255 PM CST Sun Jan 19 2020/ Another cool and calm night is in store across West Texas and southeast New Mexico, albeit a few degrees warmer than last night due to mid-level clouds developing around 03-06Z.
1050 PM EST Sun Jan 19 2020 High pressure will slowly build into the area through mid week.
112 AM EST Mon Jan 20 2020 Dry air will filter into the region tonight with dry and progressively cooler conditions expected through early to mid week as cold Canadian air continues to filter into the region.
1040 PM MST Sun Jan 19 2020 Northwesterly flow aloft continues over the forecast area as an upper ridge builds to the west. At the surface, high pressure remains over much of the Dakotas. On Monday the upper ridge will slide across the northern plains with WAA continuing. Expect to see the colder air finally move off to the east of the forecast area on Tuesday behind a sfc warm front.
Areas of dense fog has been increasing in portions of the Lower Columbia Basin this evening. Precipitation type will be mainly rain in the valleys and snow in the higher mountains with snow levels ranging from 1500 feet in the northwest CWA to around 4500 feet over central areas of the CWA and then down to about 2500-3000 feet over The Baker, Grande Ronde and Wallowa Valleys.
808 PM MST Sun Jan 19 2020 Upper ridge building into western Montana. Some high level clouds were rolling over the top of the ridge. High pressure ridging will take hold over the northern Rockies through Tuesday. Afternoon highs Monday will be warmer with lower to middle 40s except 30s east of Rosebud County. Tuesday will see highs in the lower 40s along the Dakota borders to upper 40s along the Beartooth/Absaroka Foothills.
1147 PM CST Sun Jan 19 2020 High pressure continues over Arkansas, building in from the Plains. This feature will move southeast during this period, and the associated air mass will continue to promote cooler than normal conditions.
Wind will be generally less than 10 mph as high pressure continues to build into the Southern Plains.
1030 PM MST Sun Jan 19 2020 Upper ridge approaching from the west is sending another wave of high cloudiness across southern Colorado associated with an embedded northwesterly upper jet. This should push south and east of the area overnight as ridge axis shifts eastward allowing for clearing skies and another cold night across the region. Temperatures at KALS have broken the freezing mark this afternoon and with a little snow melt beneath an inversion layer, suspect that shallow patchy ground fog will develop late tonight through early Monday morning. Monday will be warmer with continued light winds as the ridge axis aloft translates towards the eastern CO border.
Warmer air starts to move into our region Monday. Currently, Arctic high pressure building southeast across the Dakotas, resulting in a mostly sunny sky across western and central North Dakota and frigid temperatures in the single digits above or below. High pressure continues to build southeast through the night, ending up centered in northeast SD/southeast ND by 12Z Monday. 'Warmer' west and north central (still below zero) where return flow develops in the wake of high pressure. Plenty of sunshine tomorrow with highs from the low 30s southwest to the single digits above east. WAA continues Monday night and for most of Tuesday as an upper level ridge builds across then east of the region. Clouds will increase as the ridge axis pushes east, so after a sunny Monday expect mostly cloudy but dry conditions for Tuesday.
/issued 325 PM CST Sun Jan 19 2020/ A backdoor cold front will continue to move southwestward tonight. The cold front will stall tomorrow morning across southwest Oklahoma. Isentropic ascent/warm air advection downstream from the aforementioned trough will result in a low chance of rain beginning late Tuesday across the west.
146 AM MST Mon Jan 20 2020 Latest satellite and upper air analysis show a ridge over the Rockies with dry northwest flow onto the Plains. A backdoor cold front was near Highway 83. Tonight lows should be a few degrees warmer than last night east of the cold front due to weak WAA/moisture advection occurring. Monday light winds will continue as a ridge at 850mb moves over the forecast area. During the afternoon the backdoor cold front will advance further west into the forecast area, close to Highway 25, in response to the closed low moving south over the Missouri River Valley. Due to dry air in place, and the short wave ridge moving overhead, little if any cloud cover is expected along the front. Monday night the cold front will continue advancing west until midnight to roughly the CO/KS border.
However, thin cirrus moving through a mid-level high pressure trough to the west continued to stream southeastward over the southern half of the forecast area. A mid-level trough over the eastern Pacific approaches the West Coast tonight driving the previously mentioned ridge eastward bringing its axis over the region by morning. Cirrus will fill in on the western side of the ridge ahead of the eastward propagating trough overspreading the north on Monday. Overnight lows are expected to be similar, or just a bit warmer than last night depending upon how soon cirrus spreads over the region.
At the surface, high pressure will build in from the west through the period.
1253 AM EST Mon Jan 20 2020 High pressure will slowly build into the area through mid week.