Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 355 PM EDT Mon Aug 28 2017/ THIS AFTERNOON AND TONIGHT: Potential Tropical Cyclone 10 continues to move to the northeast off the Georgia/SC coast, leaving a trailing trough across the central Florida peninsula. Ridging has begun to build in from the east across South Florida today, as evident on this morning's sounding which came in with a PWAT of only 1.
753 PM EDT Mon Aug 28 2017 A large high pressure system continue to persist across the Northeast and the Canadian Maritimes.
735 PM CDT Mon Aug 28 2017 An upper level low pressure system will track into Great Lakes region tonight while an associated front trailing into far south central Missouri sags southward. As we head through the remainder of the week the upper level low over the Great Lakes will exit off to the east while upper level ridges remain positioned off the southeast U. In between the remnants to Harvey which will meander northward and northeastward around the southeastern ridge.
1158 PM EDT Mon Aug 28 2017 Southeast Michigan airspace will remain within the moist cyclonic flow attendant to low pressure slowly approaching the region tonight and Tuesday. Mid level closed low currently centered over the Chicago vicinity will drift eastward while gradually weakening to an open wave by Tuesday afternoon when it is directly over southeastern Michigan. Daytime heating will increase cape values nr 1k joules with K indices in the low to mid 30s. May have some sun in the beginning of the day but overall should be cloudy Tuesdays but highs will be slightly warmer then today as lower level temps increase a few degrees.
Upper high center remains over Utah and Nevada with a northerly flow over New Mexico.
1156 PM CDT Mon Aug 28 2017 A weak cold front will slowly move southeast through the region tonight. Scattered showers and thunderstorms will be possible through this evening along and ahead of the boundary with the aid of a series of vort maxes rotating through the area around the low pressure currently over the Great Lakes region. High pressure will build into the area Tuesday morning. By the end of the week, the remnants of Tropical Storm Harvey are forecast to have lifted northeastward out of Texas, but there remains a fair amount of model variability regarding how far northeastward, how quickly, and the degree of interaction (if any) between it and a trough axis moving out of Canada.
626 PM CDT Mon Aug 28 2017 A few isolated weak, transient storms have developed along an instability axis and near the midlevel trough axis associated with a deep upper low currently evident over southern WI. This elevated boundary will continue to drift south but will also pull eastward as the upper low departs to the east, focusing any additional pop-up storms mainly along the southeastern boundary of the forecast area.
608 PM CDT Mon Aug 28 2017 WV imagery this afternoon was revealing a large upper level high pressure dome situated over the western half of the CONUS. upper low pressure was centered just south of the western Great Lakes and embedded in a longwave trof extending southward to the southeastern states. high pressure was in control across the central Plains.
With some low level cloud cover and extensive mid and upper level cloudiness, low temperatures will only fall into the lower 70s across the region.
With dew points hovering in the lower 60s and winds already calm at many locations, dense fog is looking like a possibility tonight. 19Z water vapor loop shows a pesky upper low spinning along the WI/IL border, resulting in widespread cloud cover across the forecast area. Although the upper low will move into the lower Great Lakes region tomorrow, cloud cover will still be tricky.
914 PM EDT Mon Aug 28 2017 Potential Tropical Cyclone Ten is expected to track along the Carolina coast through Tuesday morning before moving over the Outer Banks Tuesday afternoon.
/Issued 438 PM CDT Mon Aug 28 2017/ Much drier air has invaded the OK and TX Panhandles today in the wake of the most recent cold frontal passage. An upper level ridge of high pressure is forecast to anchor itself over much of the western states through next Monday while an upper level trof develops across the eastern states. Consequently, our forecast area will be in predominately northerly to even northeasterly flow aloft around the eastern periphery of this upper level ridge of high pressure.
A strong ridge of high pressure centered over the Great Basin will bring near record heat to much of the central California interior through Tuesday.
Weak surface convergence in the vicinity of the trough will keep a small chance for showers and perhaps a thunderstorm through midnight, mainly along the Interstate 4 corridor. Low pressure near the SC coast will continue to lift northeast, allowing the pressure gradient to decrease across our waters.
729 PM EDT Mon Aug 28 2017 Latest satellite imagery shows the mid-level low currently over nrn IL this afternoon with the low progged to shift over the lower Great Lakes by Tuesday afternoon. Weak instability/forcing associated with the low combined with daytime heating continues to produce widely scattered showers over portions of Upper Michigan, however this activity will diminish as the sun sets.
748 PM EDT Mon Aug 28 2017 SE Michigan airspace will remain within the moist cyclonic flow attendant to low pressure slowly drifting through the region over the next 24 hours. Thereafter, some indication for a lower ceiling and/or fog component to emerge given the high near surface moisture content. Mid level closed low currently centered over the Chicago vicinity will drift eastward while gradually weakening to an open wave by Tuesday afternoon when it is directly over southeastern Michigan. Daytime heating will increase cape values nr 1k joules with K indices in the low to mid 30s. May have some sun in the beginning of the day but overall should be cloudy Tuesdays but highs will be slightly warmer then today as lower level temps increase a few degrees.
At 3 pm, satellite and radar data showed the upper level low churning over northern Illinois with associated scattered thunderstorms along and east of the Mississippi River. Storms will dissipate due to both diurnal processes and the exiting of an enhancing lobe of vorticity rotating around the upper low this afternoon. Tuesday, the upper low continues to slowly fill and shift east, confining its cool pool aloft and diurnal instability max to the east, just brushing our northern IL counties, where slight chance pops are maintained.
512 PM PDT Mon Aug 28 2017 High pressure will bring a warming trend with widespread temperatures in the 90s into Tuesday.
1150 PM EDT Mon Aug 28 2017 Deep low pressure continues to sit over the Great Lakes region late this evening. Some thunderstorms now at this hour in south- central Wisconsin and down into northern Illinois under the upper low/cold pool aloft. Upper low will slowly migrate across southern lower Michigan tonight and across southern lower Michigan on Tuesday.
1158 PM CDT Mon Aug 28 2017 This morning, an upper level low pressure system was situated over southern Wisconsin. This upper level low will rotate southeast and then east over the next 24 hours, reaching Lake Huron/Erie by Tuesday afternoon. Today, most of the moisture is mid level, but with time, the lower levels really moisten up.
Ridge continues to build in from the west. GAH PREVIOUS SHORT TERM DISCUSSION: A high pressure ridge of hot air occupies most of the West. Highs will end up around 5F degrees cooler than Monday.
619 PM CDT Mon Aug 28 2017 Benign weather pattern for the forecast area for the next several days due to strong ridge located over 4 corners next several days.
Issued by National Weather Service PITTSBURGH PA 512 PM EST Thu Jan 11 2018 Emerging southern stream low pressure will cross the region late Friday. A strong cold front will approach from the west throughout the day. H500 trough tilts negative with a wave developing on the front and cyclogenesis occurring near the Alabama/Tennessee border. The track and intensity of this low will determine the transition in the sensible weather Friday night. With the GFS indicating a neutral upper trough and hence much weaker forcing as deformation gets its act together further north of the area instead of over us. This scenario would encourage more mixing with lighter precip as neutral trough brings in colder air aloft slower, but the Euro and NAM wrap the system up quickly with negative tilt and deformation zone across the Ohio Valley.
522 PM EST Thu Jan 11 2018 Warm weather has dampened with rainfall and will become much colder with passage of a late Friday cold front. Rain will continue to spread over the remainder of the area this evening, and continue through the night as broad ascent is maintained ahead of the high-amplitude trough sliding eastward.
553 PM CST Thu Jan 11 2018 Our northern stream upper trough will continue to move eastward tonight. At the surface, arctic high pressure will dominate the northern plains with decreasing winds this evening, becoming rather light overnight. The low level warm air advection and upper level PV are virtually gone.
VFR will return by late morning on Friday with VCSH by afternoon ahead of the next cold front. South/southwest winds will increase on Fri ahead of an approaching cold front, with speeds possibly reaching 20 knots during the afternoon. An upper-level trough will drive a strong cold front across the local coastal waters, preceded by likely shower chances and perhaps isolated lightning storms, especially over the Gulf Stream.
Main aviation concerns will be strong northwest winds in the wake of a strong, dry cold front tonight. Friday will be cooler and drier, with less wind as high pressure spreads out over the area, and with high temperatures in the 60s. Friday night will be cooler with low temperatures in the 30s and 40s as winds decrease to light.
518 PM CST Thu Jan 11 2018 The cold front is well through the forecast area as of early this afternoon, with temperatures steadily falling into the teens and 20s. In these areas, a combination of sleet, snow, freezing rain, and flash freezing have resulted in hazardous conditions, especially on untreated roadways and walkways. Further to the east, light scattered wintry mix precipitation in the form of sleet, freezing drizzle, and snow flurries will continue through late-afternoon before shifting to the east. Impacts from this appear to be somewhat limited, in part to the later arrival of sub-freezing air and warm road temperatures in the 30s, timed with the earlier moderate precipitation.
a cold front approaching from the west will begin to spread another round of showers into the area Friday morning. Chattanooga Airport, TN 54 57 28 35 / 70 100 30 10 Knoxville McGhee Tyson Airport, TN 52 55 27 31 / 50 100 40 10 Oak Ridge, TN 52 56 27 32 / 50 100 50 10 Tri Cities Airport, TN 53 61 27 31 / 60 100 70 20 TN.
424 PM CST Thu Jan 11 2018 A line of rain and thunderstorms is currently extending across SE Texas ahead of a strong cold front that will move across the region through this evening. Winds will shift to the northwest and increase with the passage of the cold front. Surface observations across S/C Texas and Oklahoma are indicating sustained winds around 20-25 MPH with gusts above 30 MPH behind the cold front.
454 PM MST Thu Jan 11 2018 An upper level trough moving onto the Pacific Northwest coast will race southeast tonight and Friday in the strong northwest flow aloft. Snow will increase in the mountains tonight as moisture increases ahead of the trough. Ample moisture, moist adiabatic lapse rates, and ridge top flow northwest at 30-50 knots will lead to very good orographic lift. To the east of the inverted trough, north to northeast flow will usher cooler conditions. The lack of downslope and lift from the trough should produce a little light snow over the northeast corner Friday morning. To the west of the inverted trough, gusty downslope winds will produce mild and dry conditions through the day Friday. The ridge over the west will shift eastward a bit going into the weekend.
Light freezing rain or freezing drizzle will end over ern WI by 02-03z but small chances of light snow will remain through the late evening. The upper trough approaching from the west may also be able to produce small pockets of very light snow. Light freezing rain or freezing drizzle will end over ern WI by 02-03z but small chances of light snow will remain through the late evening. Medium Strong cold front will continue to make its way through the area with mid level wave providing the bulk of forcing for the precipitation.
600 PM CST Thu Jan 11 2018 The strong cold front is moving southeast this evening over AR, and will bring much colder air and strong northwest winds of 15 to 30 mph with some higher gusts. The colder temperatures will create icing with precip behind the cold front.
628 PM EST Thu Jan 11 2018 Aviation A cold front will bring rain showers this evening that will become mixed with and then change over to light snow showers. Temperatures will plummet into the 20s behind the cold front tonight. The cold front will bring rain showers into this evening that will change over to snow showers overnight as strong caa occurs after fropa.
544 PM CST Thu Jan 11 2018 20z/2pm surface analysis shows a sharp cold front between the Illinois River and the I-55 corridor. With temperatures rapidly falling late this afternoon and evening, a period of very light freezing rain will be likely. The boundary is expected to slow its eastward progress late tonight, resulting in a more prolonged episode of freezing precip along/southeast of the I-57 corridor.
808 PM EST Thu Jan 11 2018 Warm weather has dampened with rainfall and will become much colder with passage of a late Friday cold front. Rain will continue to spread over the remainder of the area this evening, and continue through the night as broad ascent is maintained ahead of the high-amplitude trough sliding eastward.
a cold front will move in and another round of low clouds and rain showers will move through the TAF sites.
Arctic high pressure is situated from southern Saskatchewan south into western and central ND this evening with mostly clear skies across the forecast area. Upper level analysis places trough stretching from near the Red River Valley southward through the southern plains.
Sharp cold front and associated squall line located from just west of KAEX to KLCH will continue to progress eastward near 25 knots and be through KLFT/KARA by 12/03Z. Upper level trough axis should swing through on early Friday, and with this skies will clear with VFR conditions at KBPT/KLCH/KAEX by 12/14Z and KLFT/KARA by 12/16Z. /issued 424 PM CST Thu Jan 11 2018/ A line of rain and thunderstorms is currently extending across SE Texas ahead of a strong cold front that will move across the region through this evening. Winds will shift to the northwest and increase with the passage of the cold front. Surface observations across S/C Texas and Oklahoma are indicating sustained winds around 20-25 MPH with gusts above 30 MPH behind the cold front.
With respect to the surface reflection of the strong upper disturbance, most recent MSAS depicts the strong cold front just offshore. Much cooler Friday with highs in the upper 50s to lower 60s. Freezing yet dry conditions may occur Friday night over the NERN CWA.
Both the low level cold advection and surface pressure gradient will weaken toward 12Z Friday with wind speeds lessening. Otherwise, clearing skies with NNW winds diminishing to between 10-15 knots will be the rule beyond 12z Friday, as strong subsidence occurs in behind the mid level trough.
646 PM CST Thu Jan 11 2018 Arctic high pressure is situated from southern Saskatchewan south into western and central ND this evening with mostly clear skies across the forecast area. Upper level analysis places trough stretching from near the Red River Valley southward through the southern plains.
Unseasonably mild and moist low level airmass will continue tonight in south flow ahead of approaching low pressure system. Lows will generally be in the lower 60s. LIFR conds already locked in place with Sea Fog/Stratus as KSSI and expected LIFR conds will develop at other TAF sites in the 03-06z time frame tonight and continue into the 12-15z time frame before lifting ahead of cold frontal shower/possible storm conditions along with Gusty Winds after 18z Fri Afternoon.
557 PM CST Thu Jan 11 2018 Early this afternoon, the cold front that brought the steep drop in temps this morning has cleared the area to the east. As the upper trough axis swings through this evening and tonight, skies will gradually clear from the west. Northwest flow aloft will continue through the weekend while at the surface strong high pressure drops southeastward from the northern plains.
627 PM CST Thu Jan 11 2018 Cold front has entered our far NW counties from around Pinckneyville IL to Greenville MO. Having said that, the latest RAP, HRRR, with NAM incorporation as well, show about 2 hours of freezing rain (glaze), perhaps 3 tops, then transitioning quickly to sleet. CN Nice new model and collaborative consensus incorporates a faster incoming speed of the freezing airmass at the surface.
329 PM MST Thu Jan 11 2018 An upper level trough moving onto the Pacific Northwest coast will race southeast tonight and Friday in the strong northwest flow aloft. Snow will increase in the mountains tonight as moisture increases ahead of the trough. Ample moisture, moist adiabatic lapse rates, and ridge top flow northwest at 30-50 knots will lead to very good orographic lift. To the east of the inverted trough, north to northeast flow will usher cooler conditions. The lack of downslope and lift from the trough should produce a little light snow over the northeast corner Friday morning. To the west of the inverted trough, gusty downslope winds will produce mild and dry conditions through the day Friday. The ridge over the west will shift eastward a bit going into the weekend.
Band of light freezing drizzle, possibly mixed with sleet, is moving through northwest Arkansas this evening. A couple narrow light snow bands were forming across eastern Oklahoma on the back side of a strong cold front, but ahead of the main trough axis, in an area of forcing. Farther east, across far eastern Oklahoma and western Arkansas, temperatures remain above freezing, allowing the precipitation to initially fall as drizzle or light rain. As temperatures drop this evening, the precipitation will transition over to a mix of freezing drizzle, sleet and then finally snow. This will cause slick spots to form on roadways and elevated surfaces, especially bridges and overpasses. The wintry precipitation will come to an end overnight tonight as the trough finally pushes east and much colder and drier air is advected into the region.
This afternoon, a strengthening frontal boundary extended from Chicago south southwest through the lower MS valley. Then a period of freezing rain is likely followed by a period of sleet and then snow. The onset of the freezing rain will occur once the surface temps drop to just below freezing. One thing to note is that the depth of the colder air may catch up to the sfc freezing line as the event unfolds. At 6 am, the mercury will range from the upper 20s far northwest to the lower 50s Plateau, quite the gradient i would say. By noon, you'll have mid to upper 20s northwest, and the lower 40s Plateau. At 6 PM, all areas will be at or below freezing with mid 20s west to near 30 Plateau.
/issued 258 PM CST Thu Jan 11 2018/ Cold air continues to move into the region this afternoon behind the cold front that moved across the area this morning.
Nice new model and collaborative consensus incorporates a faster incoming speed of the freezing airmass at the surface.
Cold front as of 9 pm this evening has just passed through Paducah, KY and is moving just a little faster than previous models and the previous forecast. Strong cold front will usher in poor flying conditions and wintry precipitation to all airports this TAF period with fropa bringing IFR cigs to CKV by 05-06Z, BNA/MQY from 09-10Z, and CSV around 16Z. Rain showers to change from freezing rain/sleet Friday morning to light snow by Friday afternoon before precip ends.
A cold front will move through this evening and overnight. A cold front is currently moving through the region tonight. A ridge and dry conditions will begin building in for the weekend.
1037 PM EST Thu Jan 11 2018 Currently - A mid latitdue trough aloft is swinging into the eastern United States and Gulf of Mexico. An associated cold front is making its way southeastwards through the Gulf of Mexico. Through the lower levels, light southeast winds veering southwest with height is bringing ample lower level moisture across the area. It is noticeably warmer across the Keys this evening, with temperatures lingering in the lower to mid 70s with dew points near 70. Short Term Update - The previously mentioned cold front will not reach the Keys tonight. This will place the Keys under a more south to southwest flow and increasingly cyclonic flow through the lower levels and surface winds will shift more southerly.
The 11 pm subjective surface analysis showed a weakening baroclinic trough extending from NY through southeast TX. In particular the southern portion of the trough had become ill-defined. It will be seasonably warm again with highs in the lower to mid 90s.
801 AM EDT Thu Sep 28 2017 Dry and cooler weather is expected today under building high pressure. Shower chances return with a Friday cold front. Dry weather is expected today under building high pressure.
1052 AM EDT Thu Sep 28 2017 Much cooler air will move in behind a cold front through tonight.
The current forecast looks good today with some cooler air moving in behind a front. There are a few clouds building in behind the boundary; mainly across the higher terrain areas in Southwest Virginia and extreme northeastern sections of Tennessee.
Will see some solar spreading from n-s however with cold advection temperatures a bit cooler than yesterday. Have a patchy frost mention in our usual cold spots, but not expecting the lower temps to be widespread enough to include any headlines at this point.
Upper level low over eastern Utah today will lift slowly northeast of Utah by Friday. Upper level low over eastern Utah this morning will lift slowly northeast into Wyoming tonight. As the upper low lifts slowly to the northeast it will bring scattered showers to the mountains from the Uintas and southern Wasatch through the central and southern mountains. Under the core of the low, weak instability is expected this afternoon with SBCAPE values of 250+ J/kg. Precipitation will end by late evening as instability diminishes and the low lifts northeast of the state.
/issued 349 AM CDT Thu Sep 28 2017/ SHORT TERM (Now through Friday): Generally scattered showers and thunderstorms are forecast across the BRO CWFA through a majority of the short term forecast period as 500 mb low pressure over the Utah and Arizona border gradually moves northeast and over the Four Corners area and western United States.
1112 AM EDT Thu Sep 28 2017 Hydro Mainly dry conditions are expected today as a ridge of high pressure moves through the region. Tonight a cold front will move into the area bringing with it the chance for rain showers. High pressure will build back in for the weekend with dry weather forecast.
1020 AM CDT Thu Sep 28 2017 Cold front has moved through the region, at least as it can be measured by the wind shift. Over the wrn portions, closer to the upper trof and in the higher dew points, a few isold shwrs will be possible as we get into the peak daytime heating hours. High pressure to become fully established across the region on Friday with northeast winds around 5 to 10 mph. High pressure to prevail through the weekend with highs in the low to mid 80s and lows around 60.