Aikyam-Lab/Synoptic-Bench huggingface dataset:
1022 AM CDT Tue Aug 22 2017 A cold front currently stretches from south of Chicago, to just north of St. Currently, a cold front extends from eastern Wisconsin through southeast Nebraska and into eastern Colorado. This cold front should drop south today reaching into southern Missouri by late this afternoon. Temperatures will be on the hot side with highs in the low to mid 90s. The cold front will move into the forecast area tonight with more thunderstorms expected. By Wednesday, the cold front will move through north Mississippi in the morning with more thunderstorms possible. Cooler air will start to move into the forecast area so temperatures will not be as warm with highs in the low to mid 80s. High pressure will build into the region by Wednesday night bringing a lengthy period of dry weather for the region.
Warmer and drier conditions will then develop across interior areas during the second half of the week. The main weather feature of interest this morning is the upper level low off the southern CA coast. Wednesday an upper level trough moves approaches the west coast and this pushes the upper low off to the east.
1024 AM EDT Tue Aug 22 2017 Weak high pressure ridging across the northern half of the area with a weak tropical wave just offshore of the SE FL coast today. This will keep limited rain chances across the northern zones for this afternoon, and allow for scattered showers and thunderstorms to develop later across the central and southern areas, with the highest chances across the south. Highs expected in the lower to mid 90s with feels-like temperatures 100-105.
513 AM MDT Tue Aug 22 2017 High clouds are streaming into the region through northwest flow, as an upper level ridge builds over the northwestern CONUS. Upper ridge will keep weather mild and mostly dry through Wednesday. Highs today will be in the low to mid 80s, with highs Wednesday warming near 90.
A ridge of high pressure will be situated over the forecast area for the next couple of days.
1259 PM EDT Tue Aug 22 2017 High pressure centered off the coast will continue to ridge into the area today.
At AMA the lower cigs will get close. Cold front is expected to switch winds around to the north and northeast at AMA by mid morning. /Issued 410 AM CDT Tue Aug 22 2017/ Cold front is moving into northwest part of forecast area at this time, with continued southward movement expected today. Threat for showers and thunderstorms will continue for the next several days, with western and northwestern sections being favored, as northwest flow aloft will provide opportunities for convection to move in from the higher terrain, while southeast low-level flow will keep moisture and instability maximized over western sections.
Currently, a cold front extends from eastern Wisconsin through southeast Nebraska and into eastern Colorado. This cold front should drop south today reaching into southern Missouri by late this afternoon. Temperatures will be on the hot side with highs in the low to mid 90s. The cold front will move into the forecast area tonight with more thunderstorms expected. By Wednesday, the cold front will move through north Mississippi in the morning with more thunderstorms possible. Cooler air will start to move into the forecast area so temperatures will not be as warm with highs in the low to mid 80s. High pressure will build into the region by Wednesday night bringing a lengthy period of dry weather for the region.
A cold front is forecast to cross Indiana today. By Wednesday high pressure will extend across central parts of both the USA and Canada. This high pressure system is expected to be very long lasting.
626 AM CDT Tue Aug 22 2017 Region will be in cyclonic flow aloft, with surface ridging propagating in from the west as the upper low propagates eastward today. The Baudette area (and adjacent portions of NW MN) will be close enough to the upper low for clouds and isolated showers.
VFR conditions will be the rule today, but as ridge weakens over the area there will be an increasing chance of convection at all TAF sites by late this afternoon/evening through the night. As surface ridging weakens allowing pressure gradients to tighten with southwesterly sustained winds up to 10kts with gusts above 15kts this afternoon.
High pressure will give dry weather and warmer than average temperatures today. An upper level system will approach the region Wednesday bringing cooler onshore flow and a few showers to the coast.
711 AM EDT Tue Aug 22 2017 Aviation A cold front will be passing through the area today. Along and ahead of this cold front, a few showers and storms will be possible this morning before coming to an end this afternoon. Clearing will take place this afternoon, and cooler air will come in on gusty Northwest winds. Most of the rest of this week and the weekend will be mostly dry and cooler.
728 AM EDT Tue Aug 22 2017 Scattered showers and thunderstorms will continue to develop across the South Florida terminals through the morning and into the afternoon hours as a trough moves into the area.
With the area now on the east side of the system, the higher moisture should result in more showers and thunderstorms than we have seen over the last couple of days. Meanwhile, a digging upper trough and associated cold front is expected to stall across northern Louisiana/southern Arkansas during the day Wednesday which will provide an extra shot of moisture and lift across the region for another round of scattered to numerous convection.
The future movement of the TUTT low will have a lot to say about the longer term forecast, with models currently showing the low opening up into a trough along the Gulf coast by the end of the short term period.
1012 AM EDT Tue Aug 22 2017 A strong cold front will move through the region late today and early tonight. Much cooler and drier conditions will return for the second half of the week. It will also be significantly cooler.
652 AM CDT Tue Aug 22 2017 A cold front over northwestern Kansas, will continue pushing southward into southern Kansas this morning, then out of south- central/southeast Kansas early this afternoon.
1026 AM EDT Tue Aug 22 2017 High pressure is centered well off the North Carolina coast. A cold front over Michigan will track across the eastern Great Lakes today, before pushing across the mid-Atlantic tonight into Wednesday morning.
Winds to gradually shift to the NW near 23/12Z across ELD/TXK behind a cold front that will move across these sites.
627 AM CDT Tue Aug 22 2017 At 2 AM, a cold front extended from Green Bay to Dubuque Iowa. A secondary cold front extended from just east of Marquette Michigan southeast to Des Moines. 00z models are in good agreement that this secondary cold front will move through the Upper Mississippi River Valley dry this morning.
1009 AM CDT Tue Aug 22 2017 Secondary cold front is in the process of working through the area this morning, with winds veering to northwesterly behind it and dewpoints dropping off into the 50s. Areas of MVFR stratus wl diminish later this morning as drier air in the low levels surges in from the northwest.
741 AM EDT Tue Aug 22 2017 WV imagery and RAP analysis indicated a mid/upper level trough from the srn portion of Hudson Bay through nw Ontario to the Upper Mississippi Valley. At the surface, a cold front extended through the cntrl U. from low pressure over ern Lake Superior. Even with lingering clouds and wind, temps over the interior west should drop off into the mid and upper 40s while readings in the lower to mid 50s prevail closer to the Great Lakes and over the east.
A cold front will move through the Texas Panhandle tonight arriving in the Permian Basin Wednesday morning. The GFS continues to be weakest/slowest with this front but convective outflow should help push it to at least the Pecos River valley bringing slightly cooler highs for tomorrow and increasing rain chances near the frontal boundary.
and then expanding this afternoon into tonight as a cold front approaches. Cold front expected to pass overnight.
1153 AM CDT Tue Aug 22 2017 At 2 AM, a cold front extended from Green Bay to Dubuque Iowa. A secondary cold front extended from just east of Marquette Michigan southeast to Des Moines. 00z models are in good agreement that this secondary cold front will move through the Upper Mississippi River Valley dry this morning.
Dry and cooler than average weather is expected the rest of the week. Hail is a low threat as well given freezing level heights and position of -20C isotherm. Previous Discussion below: Model progged wind profiles, increasing shear values, and building daytime instability continue to look favorable for severe thunderstorms with the approach and passage of the pre frontal trough. The severe weather potential is expected to end with the passage of the pre frontal trough by early evening, though with cold frontal passage progged later in the evening/overnight, shower/thunderstorm chances will continue until FROPA. As a cold front approaches today, showers and thunderstorms will become more numerous this afternoon and evening. With passage of an early Wed cold front, general VFR can be expected for the remainder of the week.
1105 AM EDT Tue Aug 22 2017 High pressure centered off the coast will continue to ridge into the area today.
The rest of the overnight hours looks like it will remain to be mild and muggy with temps not getting out of the lower 70s. As a trough digs across the Great Lakes today, it will weaken the ridge across the Southeast. Combined with southwesterly winds returning moisture to the area and daytime highs in the lower 90s, isolated diurnal convection is possible. As the cold front encroaches tonight, scattered showers and thunderstorms will spread into the TN Valley. As the front pushes through the forecast area, expect showers/storms to taper off Wednesday night as drier and cooler air begins to filter in.
Chattanooga Airport, TN 93 74 85 66 / 10 40 60 20 Knoxville McGhee Tyson Airport, TN 91 71 82 62 / 10 40 60 20 Oak Ridge, TN 91 72 82 62 / 20 60 60 10 Tri Cities Airport, TN 90 69 80 59 / 10 40 60 20.
Areas of MVFR stratus wl diminish later this morning as drier air in the low levels surges in from the northwest.
Ridge of high pressure extending across the Western Atlantic and into NE FL, will provide subsidence and drier air for NE FL Today. A trough of low pressure over SE GA will provide focus there for a few showers and storms Today.
Our attention now turns to a rather strong cold front pushing southeast through the Midwest and Plains this morning.
With the deep column of moisture in place across the region, a few of the stronger thunderstorms could produce periods of heavy rainfall which could cause some localized flooding in the low lying and poor drainage areas. /issued 728 AM EDT Tue Aug 22 2017/ Scattered showers and thunderstorms will continue to develop across the South Florida terminals through the morning and into the afternoon hours as a trough moves into the area.
910 AM EDT Tue Aug 22 2017 High pressure retreats well offshore today. A strong cold front will move across the region tonight and early Wednesday accompanied by showers and thunderstorms.
937 AM CDT Tue Aug 22 2017 Mostly clear skies prevail across the TN Valley this morning, as high pressure remains anchored over the region. Temperatures have warmed into the lower 80s, as of 9 am, under the plentiful sunshine. However, a broad upper trough will push the upper ridge east of the area and heights falls may aid in some of the convection. Temperatures are expected to warm into the lower 90s and heat indices will approach and exceed 100 degrees by early afternoon. As the cold front encroaches tonight, scattered showers and thunderstorms will spread into the TN Valley. As the front pushes through the forecast area, expect showers/storms to taper off Wednesday night as drier and cooler air begins to filter in.
1030 AM EDT Tue Aug 22 2017 Along the Florida Keys, skies are partly cloudy with light winds and temperatures in the lower to mid 80s. Surface wise, a trough of low pressure is draped near Andros Island, with high pressure to the north. With a trough nearby, light winds and ample moisture will be the impetus for wet cloud line genesis and boundaries emanating off the large surrounding land masses.
607 AM CDT Tue Aug 22 2017 A cold front has passed through the area overnight, and skies have mostly cleared in its wake. Winds will remain northerly through the day today as high pressure builds into the area. Lows should dip into the low to mid 50s, and I wouldn't be surprised if a few spots even make it into the 40s! Dry air should preclude fog development despite relatively light winds and clear skies.
1219 PM CDT Thu May 18 2017 No big changes this update, with mostly sunny skies and temperatures rising through the 40s and into the lower 50s. Currently, temperatures falling well into the lower to middle 30s across much of western and central North Dakota as colder air settles in across the region. Cold mid level temperatures associated with the high pressure will moderate today though not expecting much temperature recovery at the surface with highs once again mainly in the 50s.
352 PM EDT Thu May 18 2017 A cold front approaches from the Great Lakes tonight and passes through the area Friday afternoon.
Warm mid level temperature will continue to suppress convection for much of the day despite the eroding ridge; however, progs of increased lift along a southward sagging prefrontal trough still look sufficient to pop some thunderstorms in the warm, moist airmass over the region. Limitations look to be imposed by the northward track of the low which will result in a poorly supportive mid level forcing for ascent field. Fading instability and mid level support is expected to result in a rapid decrease in convection this evening despite passage of the actual cold front, which the deterministic models insist on sending south of the I 68 corridor. For Friday, cooler, albeit still above average temperature is anticipated in the wake of the front with a lack of sustained cold advection under zonal flow.
/issued 305 AM CDT Thu May 18 2017/ Current temperatures running about ten degrees warmer than normal.
Today Through Friday Night A stubborn ridge of high pressure will continue to hold over the southeast United States.
305 PM EDT Thu May 18 2017 High pressure over the western Atlantic will extend in to the area through Friday.
350 PM EDT Thu May 18 2017 Upper ridge centered off the mid Atlantic Coast should persist through most of the short term. Not much dynamics for convection except maybe a weak short wave or two around the western edge of the ridge. GFS/NAM indicate the upper ridge pushing westward a bit tomorrow.
Models show the upper low now over Montrose CO in southwest CO becoming less organized and actually spinning into two circulation centers overnight. By midday Friday, expect to see only scattered rain/snow showers on the plains, with the heavier mostly rain showers across the far eastern sections of the CWA during the afternoon on the back side of the exiting upper low. The upper low/trough is over the eastern half of Colorado at 00Z early Friday evening.
The cold front is about 2/3 of the way through the forecast area at this time and will clear the southeast by late afternoon. Temps will continue to fall overnight behind the front and temporarily clearing clouds will help along cooler conditions. It will be a cool day across southern Wisconsin between the cooler airmass aloft, clouds, rainfall, and east to northeast winds off Lake Michigan.
255 PM CDT Thu May 18 2017 Cold front extended from lower MI to central IL and then to low pressure situated in the se corner of CO. In the dvn cwa, northerly winds were bringing clouds and cooler temperatures to our northern cwa while it was milder in the south with a west wind, and plenty of sunshine. Lows tonight will range from the lower 40s along Highway 20 to the mid 50s in extreme northeast MO. Highs on Friday should range from the lower 50s along Highway 20 to the mid 60s in extreme northeast MO.
329 PM MDT Thu May 18 2017 Powerful late Spring storm system underway across southeast WY and the western Nebraska Panhandle as a slow-moving area of low pressure spins towards CO.
A strong upper level low pressure system rotates through the 4-corners region this evening with a short wave trough rotating around the low center expected to lift out across the central high plains late this afternoon and evening.
642 PM EDT Thu May 18 2017 A cold front will approach from the northwest tonight and cross the area on Friday.
An Eastern Pacific high pressure will begin to build in today through this weekend.
Issued by National Weather Service TUCSON AZ 159 PM MST Thu May 18 2017 Low pressure will exit the region tonight, although below normal temperatures will remain in place through Friday.
335 PM CDT Thu May 18 2017 High pressure near Dauphin Manitoba this aftn will move slowly east-southeast tonight and be near Baudette by 12z Fri. A bit warmer in the southern RRV and west central MN where a few more high clouds psbl and airmass not as dry. High pressure to our east with ridging back west into the RRV to keep our area dry thru the daytime Friday. Thicker clouds in the far southern fcst area to keep them a bit cooler than today, while northern half of fcst area to see more sun and a bit warmer readings.
This wave is advancing eastward ahead of a broad upper level low spinning over western CO / eastern UT and may help initiate a few more storms off the dryline over the next few hours. The main wave along the periphery of the low is progged to move across the area Friday afternoon. While the dryline is expected to be just east of the Panhandles, slightly better moisture (Td around 50) behind the cold front will aid in possible storm development Mainly for the western and northern zones Friday afternoon and evening.
We will remain sandwiched between a blocking H50 high pressure system over the southeast U. and low pressure out over the Plains. Minor perturbations ejecting out the base of this low will be difficult to time, but it seems as though the highest storm chances may be diurnally enhanced as instability levels should be greatest during the heat of the day.
241 PM MDT Thu May 18 2017 A weak upper level ridge of high pressure will try to build over the Pacific Northwest tonight through Friday. A few light showers are possible early this evening as the main upper level low from yesterday pulls away into the central Plains states. Afternoon temperatures on Friday will be a touch warmer than today for most areas. An unsettled northwest flow aloft will develop through the weekend with broad ridging over the U.
The highest chance for tornadoes will be across Osage/Pawnee counties associated with supercells that are approaching from southwest/central OK. The upper trough will move out into the Plains on Friday with the greater coverage of storms expected Friday afternoon and evening.
155 PM EDT Thu May 18 2017 High pressure over the western Atlantic will extend in to the area through Friday.
321 PM EDT Thu May 18 2017 A cold front will approach from the northwest tonight and cross the area on Friday.
Snowfall totals in the high country were impressive with 31 inches at Placer Basin, 25 inches at Mystic Lake and 20 inches at South Fork Shields. The Big Horns had a little less in the range of 8-11 inches as the freezing level did not drop there until late. This will release much of the snowfall liquid in the higher foothills and portions of the high country.
The excessive amount of water locked up in snowpack is going to start to melt this weekend as temperatures climb to early summer levels in the higher elevations.
Precipitation has decreases over the past 6 hours and will continue to diminish from north to south today as the strong upper low centered over northern Utah tracks further southeast. Dropped Winter Storm Warning for the lower elevations of Park county as temperatures have warmed up turning most precipitation to rain in addition to downward precipitation trends. Upper low begins to work northeast toward the Dakotas on Friday and will bring a chance of showers to SE MT as it does so. The snowfall containing this 2 to 3 inches of water will melt later today (as it fell at temperatures near freezing) sending additional water into these smaller waterways. Thinking most larger rivers have plenty of room to absorb this runoff as snowmelt has diminished over recent days with cooler temperatures in the mountains.
Drier air now working its way into our CWA from the north and northwest as upper low moves from Utah to Colorado. Upper ridge off the northwest coast will expand inland tonight and Friday bringing drier and warmer weather to our area.
1248 PM CDT Thu May 18 2017 Closed low that affected western Nebraska yesterday moving into the Great Lakes this morning. Large Upper low over the Great Basin this morning will bring our next round of precipitation today. Models seem to have a good handle on the upper low spinning over the Great Basin early this morning. Diffluence aloft over western Nebraska today with slow moving upper low moving east. Temperatures this evening and over night should remain high enough to keep and snow away from the Pine Ridge.
329 PM CDT Thu May 18 2017 Tonight through Friday, A warmer than normal and moist weather pattern will persist over the ArkLaMiss tonight through Friday as a mid level ridge center remains anchored near the southern Atlantic Coast region. As was the case today, diurnal convective precipitation will develop Friday given plenty of instability and sufficient deep layer moisture, but relative warmth in the mid levels of the atmosphere associated with ridge should help to limit thunder potential.
/issued 650 AM CDT Thu May 18 2017/ 12Z TAFS Plenty of low and mid level moisture across the area this morning will fall under the influence of a robust low pressure system dropping into the four corners region yielding another day of SCT to BKN cloud cover. /issued 350 AM CDT Thu May 18 2017/ Late night sfc analysis shows high pressure centered off the Carolina coast providing for a continued srly low-level flow over the forecast area. Water vapor imagery shows troffing over the wrn 2/3 of the CONUS with a cutoff low spinning into the Rockies this morning. Rain chances ramp up for the weekend as the low opens up and ejects newd into the nrn Plains/wrn Great Lakes, pulling an associated trof axis/sfc front towards the forecast area, along with more enhanced/deeper moisture.
There is a weak short wave trough over Coahuila that will be moving into this region.
415 PM CDT Thu May 18 2017 Clearing skies tonight as high pressure builds in. Friday will be mostly sunny but remaining below normal in the wake of the low.
Potent upper low seen on water vapor imagery currently over northern Utah near Salt Lake City this morning. Freezing levels are fairly low this morning. GFS and ECMWF continue in good agreement on movement of the upper low into central Colorado this afternoon. CWFA stays in diffluent upper level flow as this low slowly tracks eastward. Moderate to heavy precip band on the northern side of this low remains in place over the Laramie Range. Went ahead with an advisory for Converse County and warnings for the Pine Ridge in Niobrara and northern Sioux Counties. Getting snow amounts of 10-12 inches for the Pine Ridge above 4800 feet. Heaviest snow still looks to be tonight as the upper low tracks into northeastern Colorado.
and Friday The unseasonably strong upper system that produced severe thunderstorms across parts of the area yesterday afternoon and evening will weaken as it moves off into the upper ridge over the northeastern United States. It will turn much colder from north to south today as the cold front goes by, with steady or falling temperatures in most areas. The models forecast very dry air to accompany the high, with precipitable water values of. With a cold start to the evening and clearing skies, temperatures should fall quickly in central and northcentral Wisconsin, with freezing temperatures possible.
148 PM EDT Thu May 18 2017 High pressure will maintain dry weather and above normal temperatures through Friday.
Weak high pressure will be over the area through Friday.