Aikyam-Lab/Synoptic-Bench huggingface dataset:
637 AM CDT THU APR 21 2016 LARGE AND SLOW MOVING UPPER LOW WILL CONTINUE TO WOBBLE EASTWARD THROUGH EASTERN NEBRASKA AND WESTERN IOWA TONIGHT AND THURSDAY. SOUTH CENTRAL SD INTO THE HIGHWAY 14 CORRIDOR IN SOUTH DAKOTA WILL REMAIN LARGELY OUTSIDE OF THE MORE PERSISTENT RAINFALL. LATEST MODEL RUNS ARE MUCH SLOWER IN EXITING THE UPPER LOW. UPPER RIDGING DOMINATES ACROSS THE WESTERN PLAINS AND FRONT RANGE OF THE ROCKIES. ALLOWING CHILLY HIGH PRESSURE TO FILTER DOWN INTO THIS FORECAST AREA DOWN THE FRONT SIDE OF THE UPPER RIDGE. HAVE NO SUB FREEZING TEMPERATURES IN THE AREA.
A COLD FRONT SHOULD MOVE THROUGH THE AREA THIS AFTERNOON AND WILL INCLUDE THE MENTION OF VCTS FOR TAFDRT THIS EVENING. AS THE UPPER LEVEL TROUGH MOVES INTO THE GREAT LAKES AREA LATER TONIGHT INTO FRIDAY.
1100 AM EDT THU APR 21 2016 LOW PRESSURE WILL BRING INCREASING SHOWER CHANCES THIS AFTERNOON THROUGH FRIDAY. SHOWERS ARE EXPECTED TO BECOME LIKELY TONIGHT AND FRIDAY AS THE SLOW MOVING UPR LOW OPENS INTO A TROF AND EVENTUALLY DRIVES AN ASSOCIATED SFC COLD THRU THE RGN. SHOWER CHCS SHOULD CONTINUE THRU FRI EVE BEHIND THE SFC COLD FRONT AS THE UPR TROF COMPLETES IT/S PASSAGE THRU THE RGN. BUILDING RIDGING IS THEN EXPECTED TO BRING DRY WEATHER THROUGH THE WEEKEND.
729 AM EDT THU APR 21 2016 WARM FRONT INTO CENTRAL INDIANA WILL LIFT ACROSS THE FORECAST AREA THIS AFTERNOON. MEANWHILE LOW PRESSURE OVER THE CENTRAL PLAINS WILL MOVE ACROSS THE CENTRAL LAKES OVERNIGHT. DRAGGING A COLD FRONT ACROSS THE FORECAST AREA FRIDAY MORNING. HIGH PRESSURE WILL PUSH SOUTHEAST ACROSS THE AREA FRIDAY NIGHT USHERING IN DRIER CONDITIONS FOR THE WEEKEND. MODELS IN REASONABLY GOOD AGREEMENT LIFTING THE WARM FRONT NOW INTO EASTERN INDIANA ACROSS THE FORECAST AREA THIS AFTERNOON. DRAGGING THE TRAILING COLD FRONT ACROSS THE FORECAST AREA FRIDAY MORNING. HIGH PRESSURE WILL PUSH QUICKLY SOUTHEAST ACROSS THE FORECAST AREA FRIDAY NIGHT USHERING IN DRIER CONDITIONS FOR THE WEEKEND.
714 AM CDT THU APR 21 2016 BAND OF RAIN/SHOWERS WITH REAR LOBE OF UPPER LOW SHOULD SLOWLY PULL EAST SOUTHEAST THROUGH TODAY. WITH THE COOLER READINGS NORTH A BIT MORE IN THE COOLER AIR FLOW STARTING UP.
IN THE LOW LEVELS OF THE ATMOSPHERE. AN ATLANTIC RIDGE OF HIGH PRESSURE WILL EXTEND ACROSS NORTH FLORIDA THIS AFTERNOON. A RIDGE OF HIGH PRESSURE WILL BE LOCATED NEAR THE EAST COAST OF THE UNITED STATES TODAY. A TROUGH OF LOW PRESSURE WILL PROGRESS EASTWARD OVER THE WESTERN GULF OF MEXICO THIS AFTERNOON.
613 AM CDT THU APR 21 2016 Tight vort max in the center of a larger-scale closed upper low will drop out of southeast Iowa into northern Missouri through the day today. It wouldn't be surprising to see a few cold air funnels across far northern/northeast Missouri either, given the vertically-stacked nature of the upper low, very weak shear and the cold-core nature of the mid-level low. Precipitation will clear out to the east toward late afternoon and early evening as heating is lost and the mean trough axis pushes east of the area. Quiet weather moves in for the remainder of the week as broad ridging builds into the central U.
THIS IS DUE TO THE TROUGH FINALLY MAKING EASTWARD PROGRESSION ALONG WITH AN APPROACHING COLD FRONT. HOWEVER CONFIDENCE IS LOW GIVEN HOW DRY THE LOWER LEVELS ARE.
241 AM EDT TUE JUL 19 2016 High pressure builds behind a cold front today through Wednesday.
The highest rainfall amounts should be over the interior as a diffuse east coast sea breeze boundary pushes across the peninsula during the afternoon. Strong mid level ridge will persist over the central/south central U. from mid to late week with a trough pushing off the eastern seaboard. Predominant easterly flow will continue across central Florida as ridge axis of high pressure over the west Atlantic remains near to north of the area. Onshore winds will keep highs near normal along the coast, around 90 degrees, and near to slightly warmer than normal inland, in the low to mid 90s. Ridge aloft elongates across the southern half of the U.
437 AM EDT TUE JUL 19 2016 High pressure over the Great Lakes will provide fair weather across our area today and tonight. Highs today will be in the mid 80s with lows tonight in the lower to middle 60s.
315 AM EDT TUE JUL 19 2016 High pressure will build in from the west today and will settle offshore south of New England on Wednesday.
Upper level high pressure dominates for the remainder of work week with hotter afternoon temperatures. drier air working in tonight with weak high pressure will allow for cooler temperatures tonight. High pressure. with warmer air aloft keeping atmosphere capped. and upper ridging builds eastward into the region.
An upper low off the coast will bring a slight chance for showers over Western Washington through this evening with isolated thunderstorms over the Cascades. The low will weaken as it moves slowly inland Wednesday, and the threat of showers will decrease as a weaker trough sits well offshore. A weak upper ridge should bring dry and warmer weather this weekend. While the upper low responsible for showers and isolated thunderstorms yesterday lingers. The low weakens significantly through the day Wednesday. allowing for an upper level ridge over eastern Washington to start exerting some influence.
Cold front oozes south late tonight and Tuesday morning. Upper level high pressure dominates for the remainder of work week with hotter afternoon temperatures. Models bring a weak cold front tonight into Tuesday. Upper ridge starts to build into the region on Wednesday and will make for dry conditions. Humidity will be a bit less on Wednesday with dewpoints generally in the lower lower 60s.
A large trough sets over the coastline of the Pacific Northwest and goes as far inland as northern Idaho.
608 AM EDT TUE JUL 19 2016 Building high pressure will bring dry weather and increasingly hot temperatures with time. The cold front is currently near the Mason-Dixon line and will continue on south this morning. High pressure and dry weather will continue through at least Wednesday night. 500 mb heights will be on the rise as the building central CONUS ridge pushes the upper trough off to the east.
213 AM EDT TUE JUL 19 2016 A weak cold front across the area will push off to the southeast tonight. A large area of high pressure will move across the lower lakes and off the east coast Wednesday night.
The short term will be dominated by the central US ridge. The ridge will dominate most of the the forecast.
232 AM CDT TUE JUL 19 2016 Hot and humid conditions will continue for the next several days as expansive upper high builds over the southern plains. Upper high will continue to slowly shift westward mid to late week and modestly weaken over the weekend.
226 AM EDT TUE JUL 19 2016 Under mostly clear skies, temperatures will drop into the lower and middle 60s by daybreak.
442 AM EDT TUE JUL 19 2016 High pressure builds behind a cold front today through Wednesday.
127 AM EDT TUE JUL 19 2016 A cold front will move south through the Great Lakes today, and south of the Ohio River on Tuesday. High pressure will then build into the region for the mid part of the week, bringing drier weather and near seasonable temperatures. Slow-moving, ill-defined cold front still remains over northern Indiana and Ohio late this evening, best discerned via IR and WV imagery. High pressure and drier air will settle in behind the front. Mid and upper level ridging will build eastward across the mid Ohio Valley toward the southern Great Lakes through the end of the week. Our area will remain on the eastern fringe of the ridge as it builds toward the Ohio Valley and this may allow for some weak mid level energy to drop down across our area.
Warmer temperatures with a drying trend is expected by the end of the week and into the weekend.
Ridge to the north will maintain the easterly flow regime with afternoon seabreeze thunderstorms developing and pushing inland. Convection will end over western zones early this evening with low temperatures tonight in the low 70s inland to the upper 70s coast.
Current position of the cold frontal boundary looks to be INVOF southern IN/OH. High pressure also builds into the area, gradually clearing the cloud cover. That being said, at least a small ridge valley temperature split is anticipated Tuesday night depending on the cloud cover remaining. Wednesday will be dry, sunny, and warm with high pressure overhead. Showers and storms remain nonexistent at this time with the only forcing mechanism, by way of a frontal boundary, still positioned across the lower Great Lakes.
401 AM MDT TUE JUL 19 2016 Water vapor shows upper ridge amplifying through the nrn plains. low is centered over sern MT with trof extending sewd into scntrl SD. thermal ridge will build into our wrn zones with temps rising well into the 90s through the cwfa. Thermal ridge will be centered over wrn SD and should result in the hottest day of the week.
323 AM CDT TUE JUL 19 2016 The main story for today will once again be hot and humid conditions as a summertime ridge strengthens over the region.
234 AM EDT TUE JUL 19 2016 High pressure in the Great lakes will build to the southern New England Coast Wednesday.
620 AM EDT TUE JUL 19 2016 Nam shows a deep 500 mb trough on the west coast and a broad trough over ern North America with a broad 500 mb ridge over the southern U. Even with the ridge in place, hard to argue that there will not be some type of elevated convection late tonight and could see an accas field and all models are putting out some qpf, so went with low chance pops late tonight across the west half of upper Michigan. Sun and Mon is a toss-up on the pattern with the ECMWF showing a deepening upper trough while the GFS has zonal flow or slight ridging aloft.
212 AM MDT TUE JUL 19 2016 Early afternoon satellite and RAP upper level analysis shows large scale ridge entrenched across the central US, with monsoonal flow in across through the central Rockies. A warm front is slowly progressing northward over our CWA and is still roughly south of I-70. Early this afternoon-Tonight: Warm front has been slower to lift north than models had previously indicated, however a strong CAP in place is limiting initiation within frontal zone. Tuesday: Ridge continues to amplify shifting main flow further west away from our CWA. Temperatures will trend upwards with strengthening of the ridge and increasing southerly flow with high temperatures at least in the upper 90s for most locations and near 100 (to the low 100s) in our north and east.
300 AM EDT TUE JUL 19 2016 Large area of high pressure remains centered over the heart of the US early this morning. Much warmer and more humid conditions over the next few days as a strong sprawling upper level ridge covering the southern half of the country expands northward into the western Great Lakes and holds through at least the end of the week. At the same time, there will be small chances for cooling showers and thunderstorms as upper level disturbances top the ridge and graze the region.
Further east temperatures will be slightly cooler with readings in the 90s, however these very warm temperatures will combine with high humidity to produce heat indices across central North Dakota around 100 degrees.
319 AM EDT TUE JUL 19 2016 A cold front will move to the southeast by Tuesday morning. High pressure should bring dry and increasingly hot weather through much of the rest of the week. The cold front continues to slowly drop southward across the forecast area.
205 AM EDT TUE JUL 19 2016 High pressure sprawled over the Upper Great Lakes will gradually settle southeastward across our region through Wednesday.
This low will push inland later Thu with scattered showers increasing Thu night.
242 AM EDT TUE JUL 19 2016 Cooler Canadian air will blow in via northwesterly winds today. Dry high pressure will build over the region tonight through Wednesday.
515 AM EDT TUE JUL 19 2016 High pressure over the Great Lakes will build southeast across Pennsylvania by Wednesday, then off the Mid Atlantic coast by late week.
325 AM CDT TUE JUL 19 2016 Upper level analysis shows persistent upper ridge spinning over the Southern Plains. winds are generally 5-10kts from SSE with temperatures in the low to mid 70s. With upper ridge in place. models start sliding the high pressure westward which will help increase highs into more triple digit territory. some deamplification of the ridge is expected which will allow a few weak disturbances to move over the area. An upper level ridge of high pressure will dominate the weather across the srn high plains with VFR conditions expected at all terminal sites through late Tuesday evening.
336 AM CDT TUE JUL 19 2016 336 AM CDT Early this morning skies remain mostly clear, as high pressure was overhead and providing light to calm winds.
Increasing upper height's and warmer H925/H850 temperatures today will result in slightly hotter highs across much of the area. With a slight increase in upper height's and warmer H925/H850 temperatures on Wednesday, afternoon highs will be a little hotter across much of the area.
237 AM CDT TUE JUL 19 2016 Initially upper ridging out through the central and southern plains will build northward into the northern plains today and remain insitu while building over a large part of the U.
Water vapor pics indicate a low pressure trof along the West Coast with southwest flow aloft over Central and Southwest Montana. A weak disturbance moving through the flow aloft will help initiate late afternoon convection but an associated cold front will bring much drier and stable air into the zones this evening.
341 AM EDT TUE JUL 19 2016 Building high pressure will bring dry weather and increasingly hot temperatures with time. The cold front is currently near the Mason-Dixon line and will continue on south this morning. High pressure and dry weather will continue through at least Wednesday night. 500 mb heights will be on the rise as the building central CONUS ridge pushes the upper trough off to the east.
High pressure will continue over the area through the period with very small chances of showers and thunderstorms Tuesday afternoon. A ridge of high pressure will eventually slide east through the week with lesser rain chances as we get beyond Tuesday.
High pressure will move from the nrn Great Lakes to the ern Great Lakes through the period. High temps today will be similar to yesterday but cooler near the lake due to an earlier lake breeze.
537 AM EDT TUE JUL 19 2016 High pressure over the Great Lakes will build southeast across Pennsylvania by Wednesday, then off the Mid Atlantic coast by late week.
256 AM CDT TUE JUL 19 2016 The center of a mid/upper level ridge will remain nearly stationary through the end of the week.
The synoptic pattern early this morning features an expansive ridge strengthening across the nation's midsection, with a trough sliding into the Northeast. This has placed the Ohio Valley within generally weak northwesterly flow aloft, a pattern which will transition to more ridging aloft through the period. It appears with the boundary dipping just to the south of the region, enough surface ridging and "drier" low-level air will combine to promote a dry forecast. On Wednesday, upper-level ridging will begin to take more of a hold on the region.
345 AM PDT TUE JUL 19 2016 Below average temperatures continue into mid-week as a low pressure system moves across the Pacific Northwest. A trough will remain along the west coast through most of the week helping to keep temps cooler than average.
For pops on Wednesday some risk of storms late day and evening along a southward moving trough/front into NE ND and far NW MN.
448 AM EDT TUE JUL 19 2016 High pressure builds behind a cold front today through Wednesday.
550 AM CDT TUE JUL 19 2016 Latest water vapor satellite imagery showing upper level ridge building over the Northern Plains states. First impulse over topping the ridge over central Nebraska is producing showers/thunderstorms this area per latest mosaic radar. 00z GFS/NAM/ECMWF are in good agreement in building upper level ridge over the Northern Plains and Upper Midwest through tonight. Impulse over central Nebraska overtopping upper level ridge is expected to push into the western forecast area around 00z Wednesday. Next impulse overtops upper level ridge tonight and moves into southern Minnesota/western Wisconsin tonight. as the low level jet/moisture convergence weakens over the area.
256 AM EDT TUE JUL 19 2016 Nam shows a deep 500 mb trough on the west coast and a broad trough over ern North America with a broad 500 mb ridge over the southern U. Even with the ridge in place, hard to argue that there will not be some type of elevated convection late tonight and could see an accas field and all models are putting out some qpf, so went with low chance pops late tonight across the west half of upper Michigan. Sun and Mon is a toss-up on the pattern with the ECMWF showing a deepening upper trough while the GFS has zonal flow or slight ridging aloft.
255 AM MDT TUE JUL 19 2016 An upper level high will remain over the cntrl and srn plains with a continued influx of subtropical moisture in sw flow aloft affecting the area. Showers and tstms will redevelop over the higher terrain by late morning thru early aftn.
356 AM MDT TUE JUL 19 2016 H5 00Z hand analysis shows high pressure centered over the lower Mississippi Valley and an anomalously strong low off the left- central coastline of NOAM. Showers and thunderstorms continue to develop and track across the high plateaus and central mountains in the pre-dawn hours.
1124 PM MDT MON JUL 18 2016 fast flow on the se periphery of the pac ne upper low continues to support weak impulses in sw flow. massive conus ridge will build into the plains tue. Upper level ridge over the Central CONUS will remain nearly stagnant for most of the week.
155 AM EDT TUE JUL 19 2016 A cold front crosses the Tri-State tonight, followed by high pressure building in from the west through Tuesday night. High pressure moves slowly east across the area Wednesday and Wednesday night.
Latest model guidance is in agreement that mid-level heights will gradually fall overnight as an amplifying trough digging southeastward across the eastern Great Lakes/New England forces a ridge over the southern Plains to retrograde. Greatest threat for shra/tsra will remain to the n/e of the region overnight, but should increase for the local area shortly after sunrise as a weak backdoor cold front begins to push swwd thru the region.
As upper level high pressure remains just to the east of New Mexico tonight through Wednesday, monsoon moisture will continue to seep up from the south.
421 AM EDT TUE JUL 19 2016 Cooler Canadian air will blow in via northwesterly winds today. Dry high pressure will build over the region tonight through Wednesday.
402 AM EDT TUE JUL 19 2016 A weakening cold front approaches the region from the northwest this morning, stalling over the region today.
Added the lower elevations of Fremont and Natrona Counties /fire weather zones 280 and 283/ into a fire weather watch that was already in effect for Wednesday afternoon and evening for the western mountains.
Broad low pressure persists off the Pacific Northwest coast this evening, and is expected to linger for much of the week. The low is expected to weaken some the next couple of days, while high pressure aloft pushes northwest into Oregon from the Great Basin. This should result in drier and warmer weather, but onshore flow will keep temperatures from getting much above normal. Meanwhile, an upper level low will remain centered offshore through Tuesday. The upper level trough will finally move inland on Wednesday per the ECMWF solution, which was preferred.
1108 PM MDT MON JUL 18 2016 An upper level ridge wl remain centered over the central U. High temps on Tue are forecast to be around average in the high valleys, and about five degrees above average ovr the sern plains. Cooler by the Weekend. Looks like this monsoonal pattern should persist through at least Wednesday, possibly into Thu, as a strong upper high remains centered over OK. Moist air will circulate around the west side of the ridge, moving northward through AZ and NM, and bringing daily chances of storms to the area.
A warming trend is then forecast for the second half of the week and into the weekend as high pressure builds over the region.
345 AM CDT TUE JUL 19 2016 Main focus this week will be impacts from an upper level ridge on the area in terms of temps and convection. Wednesday will be similar to today albeit possibly slightly warmer.
328 AM CDT TUE JUL 19 2016 (Today and Tonight) With an upper ridge dominating the region, dry and hot will continue to punctuate the forecast for the next 24 hours. Tonight, lows will be mainly in the lower to mid 70s.
303 AM CDT TUE JUL 19 2016 A broad ridge of high pressure was anchored from the central/ southern High Plains eastward all the way into the Deep South early this morning. Mid level heights near the center of the upper high will be pushing 600 decameters, as the high center remains anchored over Kansas/Oklahoma the remainder of the week. Water vapor satellite imagery does depict some moisture trapped within the ridge across the southeast half of the CWA today and we tend to call these types of upper highs a 'dirty ridge'.
642 AM EDT TUE JUL 19 2016 Cooler Canadian air will blow in via northwesterly winds today. Dry high pressure will build over the region tonight through Wednesday.
400 AM CDT TUE JUL 19 2016 Late night sfc analysis shows high pressure centered over the sern CONUS maintaining a light and variable low-level flow over the forecast area ATTM. Water vapor imagery shows ridging aloft across the cntl CONUS with the ridge axis in place from TX through the Plains States.
142 AM EDT TUE JUL 19 2016 Dry warm weather will prevail under high pressure Tuesday and Wednesday.
/Issued 232 AM CDT TUE JUL 19 2016/ Hot and humid conditions will continue for the next several days as expansive upper high builds over the southern plains. Upper high will continue to slowly shift westward mid to late week and modestly weaken over the weekend.
High pressure over the southern plains with an upper level trough along the Pacific Northwest coast will leave the Great Basin under a southwest flow through much of the week, with moisture remaining over southern and eastern Utah.
645 AM EDT TUE JUL 19 2016 Large area of high pressure remains centered over the heart of the US early this morning. Much warmer and more humid conditions over the next few days as a strong sprawling upper level ridge covering the southern half of the country expands northward into the western Great Lakes and holds through at least the end of the week. At the same time, there will be small chances for cooling showers and thunderstorms as upper level disturbances top the ridge and graze the region.
338 AM CDT TUE JUL 19 2016 The primary weather concern this week continues to be the heat building into the region with a rather stout upper ridge taking control. With ridging aloft gripping the bulk of the forecast area, it'll be hard-pressed to get any precip for much of this week. That said, a large complex of thunderstorms currently tracking across central NE may very well clip northern MO as it rides along the ridge's periphery. The placement of the ridge's periphery is key in determining where storms will track.
238 PM EST Sun Feb 12 2017 High pressure is dominating the area at all levels this afternoon. Scattered clouds are moving eastward across much of the Florida Keys this afternoon due to convergence along the southern edge of the decaying ridge northeast of the Bahamas.
237 PM EST Sun Feb 12 2017 Surface analysis reveals strong cold front has passed through the CWA. Skies will remain clear this evening behind the front as high pressure and drier air works into the region. Expect lows to generally fall below the freezing mark for most areas. High pressure system continues to build into the region during the day Monday, and will nearly be on top of the CWA by Monday evening. Overnight lows Monday will drop near the freezing mark.
350 PM CST Sun Feb 12 2017 Really amazing landscape in the low clouds on the visible imagery today. Clearly the cold front is coming in the backdoor looking a loop of visible imagery.