Aikyam-Lab/Synoptic-Bench huggingface dataset:
320 PM CDT SUN APR 24 2016 CURRENTLY AN AREA OF LOW PRESSURE IS SITUATED BETWEEN KPIR/KMBG WITH A WARM FRONT EXTENDING ALONG HIGHWAY 12 IN EASTERN SOUTH DAKOTA. THE COLD FRONT/DRY LINE IS CURRENTLY EXTENDING JUST EAST OF KPIR/K9V9 WHERE DEW POINTS HAVE DROPPED INTO THE 40S AND LOW 50S. MUCH OF THIS CWA IS SITUATED WITHIN THE WARM SECTOR OF THIS LOW PRESSURE SYSTEM WITH DEW POINTS IN THE MID TO UPPER 50S. CONVECTIVE POTENTIAL WANES AFTER 6Z MONDAY AS COOLER AIR MOVES INTO THE CWA FROM THE NORTH. THE UPPER LEVEL LOW WILL SHEAR OUT WITH SOME WEAK UPPER LEVEL LIFT REMAINING OVER THE REGION THROUGH MONDAY NIGHT.
356 PM MDT SUN APR 24 2016 WRAPAROUND FLOW FROM THE LOW PRESSURE CENTER THAT BROUGHT THE STRONG WINDS YESTERDAY KEPT SOME CLOUDS HANGING AROUND FOR OUR NORTHERN AREAS AND ALSO HIGHER TERRAIN. TEMPS WERE ALSO A BIT COOLER WITH SOME AFTERNOON BREEZES PICKING UP. UPPER LEVEL SUPPORT WILL ROUND THE BASE OF A CLOSED LOW CAUSING THE GRADIENT TO TIGHTEN AND PROVIDING SUPPORT FOR A SURFACE COLD FRONT. AS THE LOW AND ASSOD COLD FRONT APPROACHES.
231 PM PDT SUN APR 24 2016 Low pressure will move through western Nevada tonight and Monday.
HIGH PRESSURE STRETCHING FROM THE GREAT LAKES THROUGH THE APPALACHIANS WILL KEEP DRY AND SUNNY WEATHER IN THE OFFING FOR THE END OF THE WEEKEND. CENTER OF UPPER RIDGING WILL ALSO SLIDE OVERHEAD. RESULTING IN A MODEST RIDGE/VALLEY TEMPERATURE SPLIT WITH LOWS REACHING THE UPPER 40S IN VALLEYS AND MID 50S ON RIDGETOPS. OWING TO SURFACE TEMPERATURES WARMING INTO THE LOW-MID 80S. A STOUT ELEVATED MIXED LAYER WOULD KEEP ANY STORMS LOW-TOPPED WITH UPDRAFTS STRUGGLING TO RISE ABOVE LOCAL RIDGETOPS.
110 PM EDT SUN APR 24 2016 DRY HIGH PRESSURE WILL BUILD OVER THE REGION FROM THE NORTH TODAY. AS THE HIGH CENTER MOVES OFFSHORE EARLY IN THE WORK WEEK.
125 PM EDT SUN APR 24 2016 HIGH PRESSURE BUILDS OVER THIS AFTERNOON.
329 PM MDT SUN APR 24 2016 STRONG UPPER LOW IS CURRENTLY LOCATED OVER EXTREME SOUTHWESTERN SOUTH DAKOTA. WILL DROP THE HIGH WIND HIGHLIGHTS AS THE GRADIENT AND WINDS ALOFT ONLY DECREASE THROUGH 00Z. TEMPS WILL BE AROUND 10 DEGREES WARMER THAN TODAY. NEXT UPPER TROUGH WILL QUICKLY DIG INTO UTAH BY THE AFTN.
AN UPPER LOW OVER THE COASTAL BEND OF TX LOOKS TO BRING SOME -RA INTO KLFK AFT 00Z.
120 PM EDT SUN APR 24 2016 AN UPPER LEVEL RIDGE MOVG ACROSS THE AREA THIS AFTERNOON AND TONIGHT WILL PROVIDE DRY AND WARMER CONDITIONS. A COLD FRONT WILL MOVE INTO OUR AREA MONDAY NIGHT. RETURN FLOW ON THE BACK SIDE OF A HIGH PRESSURE AREA WILL BRING A LITTLE MORE MOISTURE INTO THE AREA TODAY AS WINDS BECOME SOUTHERLY. TEMPERATURES TONIGHT WILL BE CONSIDERABLY WARMER THAT THIS PAST NIGHT. FOR NOW CONTINUED TO SIDE NEAR OR JUST ABOVE WARMER GUIDANCE BUT NOT QUITE AS HIGH AS MIXING WOULD SUGGEST GIVEN CLOUD CONCERNS. PCPN CHANCES WILL INCREASE IN AFTERNOON AS BOUNDARY SAGS TOWARD THE AREA AND LOW PRESSURE RIDES ALONG FRONT.
HIGH PRESSURE ALONG THE MID ATLANTIC WILL MOVE OFFSHORE MONDAY PROVIDING A CONTINUATION OF ONSHORE WINDS. CONTINUED WARM TEMPS INLAND IN THE LOWER/MID 80S INLAND TO THE UPPER 70S ALONG THE COAST.
255 PM EDT SUN APR 24 2016 HIGH PRESSURE WITH A WARMING TREND THROUGH TOMORROW. A COLD FRONT APPROACHES MONDAY NIGHT BRINGING CHANCES FOR SHOWERS/STORMS.
The intensity of rain showers has been gradually decreasing through the morning, but light rain will continue throughout the evening as we sit between the trough to our west and the cut-off low pressure system to our east. Southwest Montana and Lemhi county could see some increase in precipitation intensity this evening and overnight as moisture streams up from the south and interacts with the higher terrain. The highest passes, such as Lost Trail and Bannock, could see light accumulations, but even here snow will be melting quickly after falling.
350 PM CDT SUN APR 24 2016 AREA OF PCPN THAT ORIGINATED DOWN THE LOWER TX COAST (OVERNIGHT) IS CURRENTLY MOVING ACROSS SE TX THIS AFTN. THE UPPER PATTERN IS AN ACTIVE ONE WITH THE NEXT UPPER LOW/TROF MOVING IN- TO THE SRN PLAINS TUES AND ANOTHER FRI. A DEEPENING LOW PRESSURE SYSTEM OVER WEST TEXAS HAS TIGHTENED THE PRESSURE GRADIENT.
605 PM EDT SUN APR 24 2016 HIGH PRESSURE OVER THE REGION WILL PUSH OFF THE EAST COAST MONDAY AS A WARM FRONT LIFTS NORTHEAST THRU THE AREA.
350 PM EDT SUN APR 24 2016 HIGH PRESSURE WILL PERSIST OVER MUCH OF THE NORTHEAST TONIGHT BEFORE GRADUALLY MOVING EAST ON MONDAY. THIS WILL ALLOW A WARM FRONT TO MOVE TOWARD THE REGION AND SLOWLY INCREASE PRECIPITATION CHANCES ACROSS NORTHERN NEW YORK ON MONDAY.
1259 PM CDT SUN APR 24 2016 UPPER LOW CONTINUES TO SLOWLY APPROACH THE REGION.
137 PM EDT SUN APR 24 2016 A LARGE AREA OF HIGH PRESSURE WILL REMAIN OVER THE REGION TODAY. CLOUDS AND PRECIPITATION CHANCES WILL BE ON THE INCREASE VERY LATE TONIGHT AND MONDAY AS A TROUGH OF LOW PRESSURE MOVES INTO THE REGION.
317 PM CDT SUN APR 24 2016 AT H5 IMPRESSIVE UPPER LOW OVER NORTHWEST PANHANDLE OF NEBRASKA EARLY THIS AFTERNOON AS SEEN IN IR. DRY AIR ALOFT HAS SPREAD ACROSS THE AREA TEMPORARILY WITHIN THE CYCLONE DRY SLOT. BUT WRAP AROUND MOISTURE WILL SPREAD FROM WEST TO EAST AS THE UPPER LOW PUSHES ACROSS THE AREA TONIGHT. OTHERWISE A PACIFIC COLD FRONT WILL SURGE EAST EARLY THIS EVENING.
241 PM CDT SUN APR 24 2016 THE UPPER RIDGE OVER THE EASTERN CONUS WILL SHIFT EAST TONIGHT AND BE SUPPRESSED OVER THE SOUTHEAST U. MONDAY AS AN UPPER LOW/TROUGH MOVES ACROSS THE NORTHERN PLAINS AND INTO THE UPPER MISSISSIPPI VALLEY AND A WEAK DISTURBANCE MOVES ACROSS THE GULF COAST REGION.
124 AM MST Thu Mar 2 2017 08z surface analysis had low over central SD with a weak frontal boundary from eastern MT through the low into eastern NE. High pressure pushes into the CWA the rest of the day bringing seasonal temperatures. Upper ridge will build over the Rockies and push east. Lee trough from central MT into WY will morph into a warm front, moving through the CWA Friday night. Temperatures will be noticeably warmer.
Temperatures have fallen off into the mid 40s, and forecast lows in the low to mid 30s look on target. A line of showers and isolated thunderstorms blossomed along the cold front. Also updated the hourly temperatures, as readings have dropped off into the lower 50s behind the front, while some 60s hang on in far southeastern Kentucky. Main area of showers and thunderstorms has exited the state, but radar shows a few showers developing ahead of the approaching cold front. The cold front is on the door step of the forecast area at 3 PM. Much colder air will move into the area in the wake of the cold frontal passage this evening, with lows by Thursday morning in the lower to middle 30s. It will also be much cooler on Thursday with highs from 45 to 50.
1214 AM EST Thu Mar 2 2017 A cold front will bring showers and isolated thunderstorms before moving offshore early this morning.
High temperatures will be about 15 degrees cooler today compared to yesterday, and overnight low tonight into tomorrow will be near/just below freezing across our forecast area.
1007 PM PST Wed Mar 1 2017 A warming trend will occur beneath high pressure aloft through Friday.
This will bring a weak cold front and snow showers to the area this evening into early Thursday morning. but generally quiet weather is expected as upper ridging begins to build in. Upper level ridge will build over the region Friday and the weekend, bringing above average temperatures to the region.
1141 PM CST Wed Mar 1 2017 Early afternoon surface analysis indicated ridge axis from central ND into western NEb. The surface reflection of this trough is low pressure over eastern MT and this will also track southeast through SD and into IA over the next 24 hours.
A ridge of high pressure will remain over the southern Plains through the period. A weak trough will cause some wind variations during the day Thursday, mainly over northwest Oklahoma. There will be a large difference in temperatures tonight between ridgetops and valleys due to a strong developing low level inversion. Believe most locations will fall below freezing (32F), except near the Red River east of Wichita Falls. High pressure will settle over the southern Plains tonight. As the high moves off to the east, south winds will increase. A weak trough of low pressure will probably move into far northwest Oklahoma late in the afternoon on Thursday, causing another shift in wind direction.
Mostly cloudy and colder than usual tomorrow with some snow showers possible as an upper trough goes by.
The main story tonight will be the gusty winds and noticeably cooler temperatures. Plan on a cool start with morning lows in the low/mid 30s and highs in the upper 40s to lower 50s.
300 AM EST Thu Mar 2 2017 Low pressure will move into the Maritimes on Today. High pressure will build toward the area late in the weekend. Intense low pressure will move across northern Maine this morning then move into the maritimes later today and this evening. Colder air will move in from the northwest behind the low later today. A strong pressure gradient will develop today between the departing low and strong high pressure further to the west. Winds will slowly diminish late today and tonight as the low moves away from the region. Expect s/wv ridging late Thur night to be brief and slowly flatten out Fri mrng as H5 low drops south fm James Bay twd CWA.
Surface ridging will shift to the east of the region later tonight with light northeast to east winds coming around to south and southwest by sunrise. The light winds combined with a very dry air mass and clear skies means overnight lows should drop to or below the low end of objective guidance. Temperatures will be warmer than today in line with initiation of low level warm advection and neutral to slight increase in progged thicknesses.
Still forecasting anywhere from a trace to up to 2 inches east of a line from Mobridge to Redfield.
In terms of temperatures, certainly cooler than we have been recently.
1152 PM CST Wed Mar 1 2017 For the 02/06Z TAFs, VFR conditions will dominate behind recently departed cold front. Clouds will be limited to the high thin cirrus still streaming in from the W/SW behind the cold front, but mostly SKC conditions are expected to prevail otherwise. Had to lower dewpoint temperatures several degrees as the airmass behind the cold front is drier than previously expected.
A cold front will enter the Florida Panhandle overnight, then gradually approach South Florida during the day Thursday. Enhanced moisture ahead of the front will bring eastern parts of the region the highest rain chances in over a week.
1144 PM CST Wed Mar 1 2017 The synoptic pattern this afternoon features a strong PV anomaly digging into the southern Great Lakes, which has helped to carve out an upper-level trough over much of the Midwest into the northern Plains. While this trough will push further to the east tonight, yet another PV anomaly will help sharpen the trough over the Midwest by late Thursday. The gusty west-northwest winds we have experienced this afternoon will die down this afternoon as the boundary layer decouples and surface ridging briefly nudges into the region. Given the deep mixing, expected sunshine, and strong WSW winds ahead of the surface cold front dropping through, have raised highs above guidance over central and eastern MO.
Even though the cold front is not far behind the line of convection, temperatures do not drop very much behind the front. Clearing and much cooler overnight with lows in the 40s.
Fairly strong cold air advection will continue via northwest flow on Thursday, as an area of high pressure pushes toward the Tennessee Valley. This will make for a cooler day on Thursday, with highs in the lower to mid 50s. A stronger (but dry) cold front is still expected to push through the area on Thursday night. This should bring breezier conditions to the area, but mainly in the higher elevations. Lows should drop into the lower 30s on Friday morning and could drop into the upper 20s, if some guidance is correct. Especially with a second area of high pressure moving directly over the Tennessee Valley, producing very light winds. Highs in the lower 40s to around 50 degrees look reasonable.
VFR conditions will prevail with high pressure in control. /Issued 237 PM CST Wed Mar 1 2017/ Very high fire danger continues this afternoon behind cold front with two large fires noted on satellite/radar over northern Creek county.
Upper level ridge will move into the region from the west allowing for dry and generally mild weather. Weak cold front will move over the eastern plains on Thursday.
Cooler air will arrive tonight. /issued 538 PM CST Wed Mar 1 2017/ The cold front has moved through the area and we will begin transition to a colder high pressure system for the next couple of days. As an upper level trough moves to the east. The models are in general agreement with each other and the pattern is relatively simple with a ridge building to the west of the area by Friday so the Mid-South will be under northwest flow aloft for the rest of the workweek. During the a couple distant low pressure systems start to affect the local weather.
High pressure is working its way into the region, and relaxing the surface pressure gradient a bit, so winds should calm down overnight. Skies have cleared for the most part as well, so expecting CAA to dominate overnight and bring most areas to the low to mid 30s, especially for areas east of I-65.
Main short term focus is much cooler overnight lows tonight as well as near critical fire weather conditions again tomorrow.
1057 PM MST Wed Mar 1 2017 Updated forecast to extend the High Wind Warnings for the Bordeaux and Arlington areas until 11 PM late this evening. Flow aloft backs slightly to west northwest, inducing a more well developed surface lee trough and enough mixing to keep temperatures from bottoming out too much.
320 AM EST Thu Mar 2 2017 Winds increase out of the west behind a cold front today, ushering in colder air.
Selfridge. Strong high pressure over Saskatchewan into eastern ND is keeping skies clearer and temperatures lower. It looks like most of the light snow is falling in a narrow band from around Williston southeast through Killdeer and Beulah Hazen to Glen Ullin and Selfridge. Upper level analysis places ridge building over the Pacific northwest, with active northwest flow over our area. Ridge axis pushes east for Friday with a notable warmup in temperatures, though a fast moving wave zips through the ridge which may bring some light precipitation to our area. Warmer temperatures remain through the weekend, particularly over the southwest.
With yesterday's low pressure system moving off to the east, ridging is filling in behind it. Another upper level trough is off the California coast and will begin digging south towards the Baja Peninsula and creating split flow in the upper levels. This trough looks to move east and clip the area over the weekend.
330 AM EST Thu Mar 2 2017 A cold front will move offshore this morning.
Cold front will move south through region today, but do not anticipate clearing in wake of frontal passage. High pressure east of the Bahamas continues to ridge west across the Florida peninsula. Another day of above average temps can be expected tomorrow before a cold front moves through the area late tomorrow bringing in some cooler temps and less humid conditions for the end of the week. High pressure ridging across the peninsula will produce southwest winds around 5-10 knots over the coastal waters tonight and early tomorrow morning.
A reinforcing cold front, with another pressure surge in its wake, will maintain wind for the remainder of the night. Nevertheless, model world has retreated from the organized nature of the event as well as available mid level moisture, although some accumulation is likely, most especially over the ridges, given progs of a deep mixing layer under the mid level cold pool. Thereafter, building high pressure is forecast to suppress precip chances and moderate temperature for the weekend. Precip chances are projected to escalate during the first half of the new week as warmth and moisture flow back over the region on the van of a high-amplitude midwestern trough/associated cold front.
Tonight with light winds and high pressure building in temperatures should cool down into the mid 20s. This system will drop a cold front southeast across northeast Kansas, shifting the winds to the northwest and increasing to 10 to 20 mph. Even with the passage of the cold front temperatures will still be in the 50s for highs as main cold advection is east of the area.
121 AM EST Thu Mar 2 2017 High pressure will build into the area behind the cold front promoting dry and cooler weather through the weekend. Light rain will continue to push east as the cold front moves through. Dry and cool high pressure will build into the region from the west today in the wake of the cold front. High pressure will build into the area from the northwest through Friday.
Another weak cold front will push through western Nebraska late tonight and bring similar highs Thursday from the upper 30s north central to the mid and upper 40s southwest. With a broad upper ridge in place across the western Conus, a warming trend will begin Friday and persist through this weekend as the ridge builds eastward. On Friday, warmer air aloft will arrive with h850 temperatures reaching 10c southwest and 5c north. Highs to reach the upper 40s across the snow covered north, to as warm as the lower 60s southwest.
Temperatures are running warmer this evening but with clear skies overnight they will cool into the mid 30s in the central valley by morning.
/26/ The cold front has pushed through the forecast area this evening and all associated showers and thunderstorms have exited as well. Skies will be clear overnight with high pressure pushing into the region at the surface. /28/ Prior discussion below: Tonight and Tomorrow: As a cold front continues working southeastward through the forecast area this afternoon, some thunderstorms along the front have become strong to severe. A noticeably cooler night is then on order for tonight behind the cold front. Some locations may be as much as 20 to 30 degrees cooler than last night.
Inversion heights will be quite limited in the wake of the low. While there are signals that would support a more stable eastern Trough (MJO / stratospheric warming over Canada) the much warmer than normal Gulf of Mexico seems to be trying to force and eastern ridge so we can't get a stable eastern trough.
1231 AM EST Thu Mar 2 2017 Low pressure approaches from the eastern Great Lakes tonight and lifts across northern Maine early tomorrow morning. High pressure will build toward the area late in the weekend. A low over lake Erie, with an associated warm frontal system that extends east across Maine. The low will move east into southern Quebec early tomorrow morning, its associated cold front will move into western Maine. The low will track across northern Maine tomorrow morning, as the cold front moves into western New Brunswick. Low pressure will exit through the Canadian Maritimes Thursday night with sharply colder air expected to move back into the area on gusty northwest winds. Lows by Friday morning are expected to range from zero to 5 below across far northwest areas to the low to mid teens downeast.
In a nutshell expect high pressure to continue building into the region tonight into Thursday. The high is NOT of Canadian/arctic origin, so temps will only fall to near seasonal norms. It will drag another cold front through Thu night, but most precip chances will stay north/east of the forecast area, closer to the mid lvl support. A chillier pattern will follow Friday/Friday night as Canadian high pressure sinks south into the lower Ohio Valley with another freeze expected Friday night.
238 AM CST Thu Mar 2 2017 Cool temperatures and clear skies are occurring this morning across the area, as high pressure builds south across the Central Plains. Moderate west winds will occur during the first half of the day today, ahead of a dry, secondary cold front approaching from the northwest. Behind the front, high pressure will move southeast through the lower Missouri Valley tonight, with north winds becoming light by daybreak Friday. As high pressure pushes east of the area on Friday, winds will become easterly and then southerly by the afternoon hours.
/Issued 252 PM EST Wed Mar 1 2017/ A strong front will push through GA overnight as an upper trough deepens into the Great Lakes and Ohio Valley. A much drier and cooler air mass will build into the area tomorrow and tomorrow night. Some temperatures near freezing are in store for northeast GA tomorrow night.
1040 PM MST Wed Mar 1 2017 Mostly sunny and cool conditions will continue rest of today through Thursday under a drier northwest flow aloft as a ridge of high pressure builds across the west. The exception to the mostly sunny conditions is the northern Park range where some light orographic snowfall is occurring at the higher peaks.
As high pressure passes through Thursday night, low temperatures will bottom out in the single digits on either side of zero. Fortunately the frigid air we'll be experiencing will be relatively short lived as strong warm air advection and an upper level ridge build in for the weekend.
Low pressure continues to move away from the area and is currently located over eastern Michigan. A cold front extends from this low back to the southwest through the Ohio and Tennessee Valleys into the western Gulf Coast States. Temperatures ranged from the middle 30s over east central Iowa to the low 40s over southeast Iowa and adjacent Illinois counties at mid-afternoon. Winds will slacken this evening and skies will briefly clear as a fast moving low pressure system drops out of the northern Rockies. This low will move across the region tomorrow and spread rain and snow across the area. Northwest flow will continue as a longwave trough carves out over the Eastern US and a ridge builds over the Western US. This ridge will begin to build over the Plains by this weekend.
Snow associated with this trough push east through central/southwest WI. Another weaker mid-level trough dropping into the region overnight for the possibility of another trace to locally 1/2 inch of snowfall. A ridge of high pressure will provide a quiet Friday with highs in the mid 20s to middle 30s.
Will deviate from model blend suggestion of mostly sunny skies today and will maintain partly cloudy with some clearing overnight as upper ridge becomes better established. Ridge to hold through Friday evening providing mostly clear skies.
303 AM CST Thu Mar 2 2017 An upper level trough is centered over the Great Lakes area with westerly flow over the CWA. An upper trough will develop just south of California and the previously mentioned upper trough will be over the New England states on Friday.
A ridge of high pressure will cross the western US through the end of the week allowing temperatures to rebound areawide.
343 AM CST Thu Mar 2 2017 Cold front has moved through the area causing dew pt temps to fall rapidly while actual temps are cooling but at a slower rate.
Mid- to upper-level high pressure ridging is slowly building-in from the west. At the surface, the attendant low centered over southwest SK this afternoon will also continue moving southeastward, while the cyclonic circulation of this low should allow frontogenetical low-level convergence and narrow bands of precipitation to persist over portions of North-Central MT through this evening and perhaps into Thursday morning. Lastly, the high wind warning has been cancelled given observed wind trends and latest model guidance. The aforementioned upper ridge will crest over our CWA Thursday evening.
Behind this is a meso-scale Ridge/Trough couplet over the Gulf of Alaska. Thursday through Thursday night: A brief clearing is expected Thursday morning but by the late afternoon the ridge upstream will have moved inland and enlarge into synoptic size. Friday: Ridge should hit in full force with 40s for highs and clear to partly cloudy skies through most of the day.
Weak mid-level warm air advection ahead of approaching cold front aided by 500H short wave over central WI have been producing areas of -sn over south central WI since around 06z.