Aikyam-Lab/Synoptic-Bench huggingface dataset:
1258 PM EST Sat Mar 4 2017 Canadian high pressure will ridge into the forecast area from the north through tonight. Tonight will be cold again and much of the area will have freezing temperatures. It will not be as cold Sunday night because of air mass modification and developing onshore flow as the ridge shifts eastward.
457 PM EST Sat Mar 4 2017 High pressure will build across eastern Canada and the northeastern states tonight and Sunday.
229 PM EST Sat Mar 4 2017 Dry conditions and mostly clear to partly cloudy skies are expected into tonight and Sunday as an upper level ridge builds in.
Further west, moisture is also expected to increase per upstream obs, although temperatures will be comparatively warmer and winds will be stronger, so elevated to near critical conditions are expected.
An upper level ridge shifting east into the MS river valley by sunset today to help keep bring sunny and milder springlike temps to the area. Areas over our far northeast such as Hoopeston may have a tough time cracking the 50 degree mark, while locations across far southwest Illinois, such as Winchester, will see afternoon temperatures in the lower 60s.
117 PM EST Sat Mar 4 2017 Canadian high pressure will extend southward into the region tonight and Sunday.
343 PM EST Sat Mar 4 2017 The surface analysis showing warm front is a bit further west, but the frontogenetical forcing resides right across the area. The highs have been tricky given the earlier cloud cover leading to late afternoon highs in the far east. Tonight the upper level ridging will continue to build from SW to NE across the region. Dewpoints are not expected to be as low, but we do see higher temperatures ergo RH values in the low to mid 20s. Sunday night the moisture will continue to increase ahead of a upper level wave moving NE out of the Lower Mississippi River Valley.
High pressure centered across the Great Lakes/Ohio Valley region this afternoon will continue to push eastward tonight. With the CWA on the southern side of this high, the winds will remain easterly through tonight and low level moisture will increase. With the increase in moisture and cloud coverage tonight, lows will be around 5-10 degrees warmer than last night with lows mainly in the 40s, except lower 50s directly along the coast and upper 30s across far northern southwest Georgia.
There is a little extra digging of the low pressure system moving inland, causing timing to be a little slower.
1035 AM MST Sat Mar 4 2017 09z surface analysis had warm front from central ND into eastern NE with a lee trough from central MT into eastern CO. Lee trough supported by low level warm air advection under building upper ridge aloft. Gusty south to southwest winds over portions of northeast WY into the higher terrain of the Black Hills noted. Today through Sunday afternoon, upper ridge will shift into the Midwest as southwest flow aloft develops over the CWA ahead of upper trough now moving onto the northwest US coast. Warm air advection supports peak thermal ridge for Sunday. Sunday night, upper trough approaches with close-off 500mb low developing over northwest SD late. Low will pull cold front into CWA late.
Surface analysis this morning places a ridge of high pressure over the Mid-Atlantic States. Southerly winds on the back side of high pressure have already returned to the Mid-South with temperatures as of 10 AM CST in the 50s at most locations. High pressure will retreat east and warmer southerly flow will develop.
Warm temperatures today will extend into the overnight hours as warm front lifts northeast with time through the forecast area. it becomes more diffuse overnight as warmer air overtakes the entire region. Over the north afternoon highs may actually be warmer due to todays limited rise north of the warm front.
1258 PM EST Sat Mar 4 2017 Strong high pressure gradually settles over the Mid Atlantic states tonight through Sunday.
Upper level lift and an increase in moisture will result in rain chances for southeastern parts of the CWA in the Lower Trans Pecos and far southern Permian Basin. Low clouds will keep overnight temperatures in the low 50s/upper 40s which is well above normal across the Permian Basin and Lower Trans Pecos. Rain and thunderstorm chances will diminish through the weekend as trough moves east and weakens.
1222 PM EST Sat Mar 4 2017 Canadian high pressure will ridge into the forecast area from the north through tonight. Tonight will be cold again and much of the area will have freezing temperatures. It will not be as cold Sunday night because of air mass modification and developing onshore flow as the ridge shifts eastward.
Dry conditions will return this afternoon and remain in place for the remainder of the weekend with high pressure in place. Southeastern CWA will see generally clear skies through the period, and warmer temperatures approaching 50 degrees today because of it. The remainder of the CWA will be hard pressed to push past 40, with most of the region lingering in the low to mid 30s, especially in central Ohio. As the low clouds erode with the exiting upper level disturbance that brought the earlier snow, some mid level clouds will linger in northern and central Ohio this evening. High pressure will be situated to the east tonight into Sunday.
Upper low off the PACNW coast continues to bring showers to the area this morning. Bulk of the showers will be over the higher terrain north of a KBNO-KJER today, with little to no activity along the NV border. Snow levels fall to the valley floors behind a cold front Sunday morning. Slightly warmer temperatures across the valleys today will keep snow levels between 4000 and 6000 ft, resulting in rain through this afternoon. Snow levels will decrease through the evening and overnight hours as a cold front approaches eastern Oregon. The cold front will continue to progress eastward on Sunday, with models hinting at an increasingly unstable atmosphere through the afternoon.
140 PM EST Sat Mar 4 2017 Canadian high pressure will extend southward into the region tonight and Sunday.
1220 PM EST Sat Mar 4 2017 Canadian high pressure will extend southward into the region tonight and Sunday.
1121 AM CST Sat Mar 4 2017 A short wave trough centered over the TX Big Bend area this Saturday morning forecast to continue moving E through Sunday through LA.
256 PM CST Sat Mar 4 2017 Strong 1044 mb high pressure over western Quebec and ridging southward into the eastern Ohio river valley that brought sunny skies to central IL today, will drift eastward across the Atlantic States on Sunday. An upper level ridge will continue to build into IL tonight and expand over the central Great Lakes, Ohio and TN river valleys on Sunday. Mild springlike highs in the lower 60s are expected over most of CWA with a few upper 50s from Bloomington and Champaign ne, with mid 60s over west central IL from Jacksonville west.
Water vapor imagery reveals drier air with subsidence following the passing upper level trough axis. Warmer temperatures and snow scouring have ended the blowing snow concerns for this area, so the winter weather advisory will be allowed to expire. This low pressure area will then drag a Canadian cold front southeast into North Central Montana tonight, likely bringing a band of snow to the Rocky Mountain Front and adjacent plains, including Cut Bank. The cooler air will be slower to get into the valleys of Southwest Montana and to the south and east of the line, so showers should mostly be at most a rain/snow mix there.
341 PM CST Sat Mar 4 2017 Upper level ridge just east of the area will continue shifting east overnight and Sun.
948 AM PST Sat Mar 4 2017 The weather will remain active this weekend, as a cold upper level trough begins to shift into the region. This should lead to an increase in precipitation into this evening with a better chance of accumulating snow after sunset when road temperatures fall to near freezing.
Valley rain and mountain snow showers are passing through the region this afternoon as a trough takes hold of north central Idaho and western Montana. The cold front is on track to pass during Sunday, and as with most cold fronts this time of year that reach the Georgetown Lake/Deerlodge/Butte area, intense snow is possible during the afternoon. The lowering snow levels and passing cold front on Sunday may lead to additional winter weather highlights.
1223 PM EST Sat Mar 4 2017 Weak upper ridge to round out weekend.
150 PM EST Sat Mar 4 2017 Canadian high pressure will extend southward into the region tonight and Sunday.
1206 PM EST Sat Mar 4 2017 Strong high pressure gradually settles over the Mid Atlantic states tonight through Sunday.
Water vapor imagery reveals drier air with subsidence following the passing upper level trough axis. Warmer temperatures and snow scouring have ended the blowing snow concerns for this area, so the winter weather advisory will be allowed to expire. Southwest winds will weaken especially at the surface through the afternoon as a disturbance and associated warm front pushes north into the Plains this afternoon. This low pressure area will then drag a Canadian cold front southeast into North Central Montana tonight, likely bringing a band of snow to the Rocky Mountain Front and adjacent plains, including Cut Bank. The cooler air will be slower to get into the valleys of Southwest Montana and to the south and east of the line, so showers should mostly be at most a rain/snow mix there.
/issued 1035 AM EST Sat Mar 4 2017/ High pressure will continue to drift over the eastern U.
Nearly neutral advection along with full sun and a building ridge aloft will provide warmer temperatures than yesterday, in the mid 50s to lower 60s.
1239 PM CST Sat Mar 4 2017 Weak warm front across northern MO and central IL will continue moving northward today. Upper level ridge over the Plains will move eastward into our area.
400 PM EST Sat Mar 4 2017 Strong high pressure gradually settles over the Mid Atlantic states tonight through Sunday.
224 PM MST Sat Mar 4 2017 Upper ridge has pushed east of region creating warm and dry southwesterly flow aloft over the northern plains. Mid and upper warm air advection supports peak thermal ridge for Sunday. High temperatures on Sunday are expected to range from 20-30F warmer than average. On Sunday night, a fast moving upper trough will approach as an open wave, developing into a closed-off 500mb low as it moves off to the northeast of the forecast area.
1255 PM EST Sat Mar 4 2017 Aviation A strengthening area of high pressure will drift east of Lower Michigan today.
This may not last more than a few hours, but cold advection over the relatively warmer waters will likely keep winds gusty in nature through at least mid-morning. Behind the front, breezy north winds will continue overnight, fueling cold air advection that will drop low temperatures down to much cooler than previous nights, generally dropping into the upper 30s over the northern Nature Coast, and 40s and low 50s farther south. The elevated winds will hold into Friday morning before subsiding as high pressure fills in through the weekend.
1034 PM MST Thu Feb 9 2017 06Z TAF CYCLE Surface lee trough with strengthening wly mt top winds through 11/00Z.
These gradients are expected to relax this evening as a surface pressure ridge builds temporarily over Eastern Conus. No precipitation is anticipated for tonight into Friday thanks to said ridge. As high pressure moves to the east Friday morning, winds will shift to the east and then southeast, increasing to 5-7kts by Friday afternoon. However, with lower winds under high pressure we should not reach red flag criteria.
250 AM EST Fri Feb 10 2017 Cold high pressure over the forecast area this morning will move off the coast this afternoon.
1139 PM CST Thu Feb 9 2017 South winds have veered and increased to around 10 KT as North Texas resides between a strengthening lee side trough to the west and a high pressure ridge to the east. The southerly flow will advect warmer air with temperatures in the 70s/low 80s.
231 AM CST Fri Feb 10 2017 Breezy and warmer today as high pressure moves away and southerly flow develops.
A ridge of high pressure continues to build across the Mid-Mississippi Valley and toward the Tennessee Valley region this afternoon. Cooler temperatures, a drier airmass and gusty northerly winds are in place across our forecast area as the associated ridge axis builds southward into the Gulf of Mexico. Surface ridging will shift eastward toward the southeastern states and the western Atlantic Ocean through Friday, while dry northwesterly flow prevails aloft. Clear skies and a gradual decrease in wind speeds will promote much cooler temperatures around the forecast area tonight, with lows expected to range from the lower to mid 30s inland and in the upper 30s to mid 40s near the coast.
As the high shifts further east, winds will gradually become easterly overnight, and southeast on Friday. /issued 355 PM CST Thu Feb 9 2017/ High pressure centered to the north of the area today has allowed for plenty of sunshine and pleasant conditions. Unfortunately, the progressive nature of this high means that change is in the works in relatively short order as winds will veer back to the southeast and then south overnight tonight into Friday morning bringing with it increasing moisture and cloud cover.
Behind the front, breezy north winds will continue overnight, fueling cold air advection that will drop low temperatures down to much cooler than previous nights, generally dropping into the upper 30s over the northern Nature Coast, and 40s and low 50s farther south. The elevated winds will hold into Friday morning before subsiding as high pressure fills in through the weekend.
A secondary trough swings across the area late tonight and Friday morning, which will bring another burst of wind, albeit weaker, to the South Washington and North Oregon coast. High pressure builds Saturday, but a couple weak disturbances in northwest flow aloft will maintain some shower activity across much of the area.
A Canadian high pressure system has shifted east of the Ozarks this afternoon. A cold front will sweep through the region Friday night into Saturday morning.
1222 AM EST Fri Feb 10 2017 Canadian high pressure passes over the area Friday. Warmer weather will return for the weekend as the Canadian high moves away to the east. Inferring from Doppler VWP observations, it appears the strongest low-level northwesterly jet core right now is more-or-less aligned along the Blue Ridge spine and the trend in 00z NAM-4km 850 winds is a decrease in northwesterly wind gusts. A large area of high pressure along the Southeast Coast Friday evening will move eastward into the Atlantic Ocean.
The lows tonight will occur right around sunset with slowly rising temps overnight. It will also however moisten up the lower levels and probably produce at least a scattered deck of lower clouds. Should this lower cloud deck become more pronounced it could impact highs.
205 AM EST Fri Feb 10 2017 Cool high pressure over the area will move off the Southeast coast late today through tonight, bringing a warm southwest flow into the region over the weekend. The latest surface analysis shows high pressure building in from the NW, and as it shifts overhead and to our SE through the day, we'll retain very dry low level air, with light/variable winds increasing from the SW.
outside of the deeper snow cover, temperatures will drop to the lower teens overnight. Clouds will begin to increase early in the morning as warmer air returns to the region.
1013 PM CST Thu Feb 9 2017 Strong WAA developing from west to east as a surface warm front moves into the western Dakotas. Will need to keep an eye on road surface temperatures for possible freezing rain at ground level. Expect at least a slight chance to a chance for freezing rain or sleet across northwest and north central North Dakota late this afternoon and evening. Secondarily, increasing low level winds (h850 level) over 55 kts will move across the region in the warm sector of the low tonight and Friday. Still believe the guidance is too low tonight and Saturday so used a blend of Superblend and the highest of all guidance. Temperatures will rise overnight tonight west into the lower 40s and rise or remain nearly steady east.
1126 PM CST Thu Feb 9 2017 The synoptic pattern early this afternoon features fairly amplified flow, with a deep trough digging into the Northeast and an upstream ridge located across the west-central CONUS. This ridge will build into the Midwest through the period, allowing for a marked increase in temperatures over the next 24 hours. However, as skies clear, surface ridging currently parked over eastern MO will push off to the east which will allow for return flow to commence. Despite the low level cloud cover limiting solar insolation highs on Saturday will still be well above normal.
307 AM CST Fri Feb 10 2017 Upper level ridging continues to dominate our weather today. At the surface a high pressure is moving east, while lee troughing is developing over the High Plains. The upper level ridge begins to breakdown late tonight as an upper level trough moves into CA. As it does so a west-east oriented warm front will push north and become quasi-stationary between HWY 36 and I-70. This could change though if the warm front stalls further north or further south than the current forecast. Additionally, areas along the warm front have a chance of rain Saturday. The upper level trough over CA will split into a northern wave and southern wave.
1143 PM EST Thu Feb 9 2017 Deep low pressure will track into the North Atlantic tonight. High pressure drifts over the Eastern Seaboard on Friday. A warm moves northeast across the area early Saturday followed by a cold front early Saturday night.
Tonight should be a mild night for February standards as a warm front passes through from west to east. We probably will not get much below freezing for most locations, except for perhaps cooler in our north where there is still snow cover. the expected warm-up is coming as a low amplitude ridge arrives with 850 mb temps in the 16 to 20C range, and I have bumped up temperatures even more to near CONSMOS temperatures for most places into the 70s for much of the CWA, except for our far north where there is some snow cover, and I have lowered temperatures there to about 5 degrees below CONSMOS. There will be a noticeable cool down Saturday behind a cold front, but still above normal.
110 AM EST Fri Feb 10 2017 Cool high pressure over the area will move off the Southeast coast late today through tonight, bringing a warm southwest flow into the region over the weekend. Expect lows will generally be in the lower to mid 20s. High pressure will move offshore during the day Friday. As such, lows Fri night will be 10F+ warmer than tonight, in the mid 30s.
1148 PM CST Thu Feb 9 2017 Confidence remains high that much warmer temperatures will spread across the region on Friday as westerly downslope effects boost daytime highs. The warm above normal temperatures will continue for Saturday especially across southern Kansas as a cold front pushes southward across central Kansas.
Predom clr and cooler conditions have developed across the cntrl TN Valley this Thu evening, as a strong dome of high pressure begins to work its way ewd across the TN/OH Valley regions. This flow, along with higher thickness values and plenty of sun should produce notably warmer temperatures, with highs warming into the mid 50s to around 60. The above noted upper low will weaken and become involved in polar jet during Friday, while another low to the south forms. Even with the additional cloud cover, the southerly flow will bring much warmer temperatures to the Tennessee Valley for the first half of this weekend.
945 PM MST Thu Feb 9 2017 Strong high pressure will keep unusually warm weather with well above normal temperatures continuing through Friday. A strong cold front will then march through the area on Saturday bringing much cooler temperatures, breezy to windy conditions, and a decent chance of light rain.
104 AM EST Fri Feb 10 2017 High pressure will build over the region into Friday followed by a warming southerly flow of air this weekend. An upper trough will deamplify as it moves off the East Coast tonight and Friday, while a low amplitude upper ridge crosses the Southern Great Plains. Channeled vorticity rounding the base of the trough will cross the Carolinas tonight. At the surface, a ridge of high pressure reaches the Western Carolinas and northeast Georgia by Friday morning, while mid level cloud cover associated with a front to the west reaches the mountains.
307 AM CST Fri Feb 10 2017 Early this morning, high pressure was analyzed over the southern Mississippi River valley. Across the area, southerly winds were beginning to return much warmer air to the region.
319 AM CST Fri Feb 10 2017 The broad 500mb ridge encompassing much of the continental U. The northern end of the 500mb trough currently sliding into the Pacific Northwest will slide over southern Saskatchewan and MT Saturday morning, and pivot across the Dakotas by 00-06Z Saturday. The southern end of the 500mb trough will cut off from the main trough and sink across southern CA during the same time.
1143 PM MST Thu Feb 9 2017 High pressure continues over the southwestern CONUS this evening, with another record high reached in Grand Junction as of 330pm this afternoon. A few high clouds will spill over the ridge axis and across the central and northern portions of Utah and Colorado through the afternoon and evening hours. Surface temperatures will be warm enough for rain in all but the highest mountain locations over 10,000ft. By early Saturday morning, a cold front will make its way south of the Wyoming border and into northern Colorado and Utah. An upper level low pressure system will cut off and dive south into southern Arizona through the day Saturday.
The resulting winds and mixing will help keep min temps warmer in the western portions of the area. /TW/ Prior discussion below: Tonight through Friday: Polar high pressure is making a rare appearance in the ArkLaMiss as we go through the near term. Have kept most locations above freezing but it would not be surprising if we get more decoupling of the boundary layer than anticipated. As we go through Friday, a warm- up will commence under mostly sunny skies with high pressure shifting east and southwest low-level flow developing.
Dry conditions and clear skies as stacked high pressure builds east across the deep south. Low level flow will veer from a chilly NNE flow this morning to onshore into the afternoon with a continued decrease in magnitudes as the low level ridge center builds over the region. strong upper low moves across the Northeast.
A dry NW flow in the mid to upper levels will continue today, while high pressure at the surface will be drifting east across the Carolinas. Tonight, with the surface to 850 mb high near FL and a strengthening low pressure system moving into the Great Lakes, a strong LLJ will develop over the TN Valley region. While the W-SW direction of the jet will not favor a mountain wave setup, model depictions of 50-60 kt winds at 850 mb could result in advisory level winds in the higher elevations.
302 AM CST Fri Feb 10 2017 The warmer air has arrived. A low pressure system currently located over North Dakota and the International Border will continue to shift the winds to a zonal component during the day. The warmest temperatures will occur west of the I-29 corridor and the downslope area of the Buffalo Ridge with highs reaching the low 50s. Lowered pops in the morning from given Superblend with dry air in the lower levels initially. Although it will be a cooler day in a northerly low level flow, any precipitation will be in the form of rain with highs in the 40s.
334 AM EST Fri Feb 10 2017 High pressure will build across the region through the weekend.
This is occurring between a low pressure system tracking east along the U. /Canadian border and high pressure over the SE U. Despite the strong WAA, the atmosphere in the low and mid levels remains very dry, so despite radar showing returns, nothing is expected to reach the ground. Temps fall back into the lower 30s overnight, but it remains dry.