Aikyam-Lab/Synoptic-Bench huggingface dataset:
259 PM MST Fri Apr 7 2017 A Pacific low pressure system and associated front will swing into the western states this weekend resulting in strengthening winds on Saturday. Precipitation chances will be focused across the northern half of Arizona with no precipitation expected in the lower deserts.
151 PM EDT Fri Apr 7 2017 Snow showers will taper off this afternoon, ending last in the high terrain. High pressure will build overhead through the weekend, bringing the return of dry and seasonable conditions. Will maintain snow shower chances through the afternoon, with the best chance for additional accumulation in the ridges, albeit mainly on grassy surfaces. High pressure will builds at the surface and aloft tonight. Radiational cooling will support below average temperatures, especially in the ridges where there will be fresh snow cover. Upper level ridge will settle overhead through the start of the week with dry conditions expected.
358 PM EDT Fri Apr 7 2017 An upper level trough will gradually lose its grip on the area on Saturday.
* None Rapid improvement in weather conditions is expected this morning as the back edge of the precipitation shield associated with strong low pressure shifts steadily east as said low tracks into New England.
Frost Expected Tonight, Some Locations Just Below Freezing. Still have some wind gusts out there, as the center of the high resides just far enough to our southwest to keep a gradient over the region. Our cool spots, especially in the northeast could see several hours of temperatures below freezing, so decided to add a freeze warning headline. High pressure will slide east of our longitude during the day Saturday, and a nice warmup will ensue.
305 PM CDT Fri Apr 7 2017 Through the day Saturday: High pressure is delivering the region plenty of sunshine and temperatures generally a little cooler than average this afternoon, but the weather around our forecast area in the springtime really doesn't get a whole lot better than this! The high pressure responsible for the sublime conditions will be on its way off to the east through tomorrow, but only very slowly, which will ensure the perfection of this afternoon does not ebb quickly.
157 PM EDT Fri Apr 7 2017 As low pressure moves north of New England, a trailing weak low pressure trough will move across today.
235 PM EDT Fri Apr 7 2017 Low pressure in the Northeast States and high pressure building across the Lower Mississippi River Valley will cause dry northwest flow over the region, and breezy winds this evening.
115 PM EDT Fri Apr 7 2017 The deep low that brought strong winds to the area yesterday will continue to move slowly northeast today with high pressure building into the Midwest in its wake. The high pressure system will move across the area tonight providing fair weather with lows around freezing. Dry weather will continue through the weekend as the high moves slowly east, with southerly winds on its backside resulting in a significant warm up.
306 PM CDT Fri Apr 7 2017 High pressure will control the weather across central Illinois tonight, providing clear and chilly conditions. The ridge axis will be directly overhead this evening, then will shift into Indiana by 12z Sat. Am expecting the coldest lows in the lower 30s to be focused near the Indiana border, with readings in the middle to upper 30s further west across the remainder of the area. As the high moves further away and the pressure gradient tightens, gusty southerly winds will develop on Saturday.
112 PM CDT Fri Apr 7 2017 Updated for 18Z aviation discussion 18Z TAF discussion: VFR conditions are expected through the next 24 hours as high pressure remains generally in control of the region's weather. Expect northerly flow to continue to slacken through the day, but high pressure will keep skies clear aside from some passing thin wisps of cirrus. Wl remain under northwest flow aloft through tonight but the large amplitude upper level trough that has been over the region this week will be shifting east today.
239 PM MDT Fri Apr 7 2017 Upper ridge axis over the central high plains today will shift eastward by Saturday with southwest flow aloft replacing it. At the surface, trough will move out of northeastern Colorado tonight ending up near a McCook to Gove line by Saturday afternoon. West of the trough, southwest winds will increase in the afternoon and dew points will fall due to downsloping.
Temperatures will be a few degrees warmer tomorrow, especially west where cloud cover has kept temperatures down a bit this afternoon. Deepening low pressure coming out of the Rockies will increase those winds, especially Saturday afternoon and night.
302 PM EDT Fri Apr 7 2017 Snow showers will taper off this evening, ending last in the high terrain. High pressure will build overhead through the weekend, bringing the return of dry and seasonable conditions. High pressure will build at the surface and aloft tonight. Radiational cooling will support below average temperatures, especially in the ridges where there will be fresh snow cover. Upper level ridge will settle overhead through the start of the week with dry conditions expected.
Quiet and getting warmer. Big blue 'H' is found in the lower MS Valley, and is extending a sharp ridge axis north to Lake Superior and James Bay. The ridge will slide overhead late tonight and downstream Saturday, allowing warm advection to get underway. with the arriving ridge, ongoing still-blustery winds will rapidly diminish tonight. ridge axis passes, though the onset of return flow is still relatively light, with 850mb winds becoming sw at around 20kt.
324 PM CDT Fri Apr 7 2017 Just some thin high clouds passing over the area today with temperatures this afternoon in the low to middle 70s. This will cause the lower levels to moisten a bit along with a warming trend into the weekend.
500 mb ridge extended from Mexico up into Colorado, then toward Manitoba and Ontario Canada. That will build eastward across the Plains today and tonight, while a trough develops along the west coast by 12Z Saturday. At the surface, a ridge of high pressure will slide eastward, with increasing southerly flow today. This should bring warmer air into the area. Stayed pretty close to those, but went maybe just a bit warmer in some areas today and Saturday.
First round will be associated with pre-frontal trough swinging through with strong jet aloft, with second round associated with passage of main trough axis and sfc front Saturday night. Best potential for accumulating snowfall will be confined to the higher elevations (generally above the 9k mark) and focused on the Park and Gore Ranges in northern Colorado.
Lows on Saturday morning will be warm as a south wind remains fairly strong through the night and warmer air aloft builds in. Southerly winds early in the day will transition to west/northwesterly through the day as the trough/boundary tracks eastward. Considering thermal profiles, seemed prudent to remain on the high side of guidance with highs in the upper 70s to lower 80s. It will be a mild night with lows in the lower to mid 50s.
The ridge will move east by daybreak bringing south winds back to the region. /issued 1034 AM CDT Fri Apr 7 2017/ High pressure at sfc and aloft resulting in lgt northerly winds over eastern sections of area, and lgt se winds over western sections. Current 10 am temps are mainly in the lower to mid 60s and with an expected 10 to 15 degree rise, aftn highs of mid to upper 70s can be expected. High pressure is sprawled all over the area this morning with only a single mb difference from Tyler to Monroe where pressure is the highest rounding up to 1024mb. Much less wind than we have seen here lately to say the least with the high pressure air mass to continue to drift Eastward.
Southwest flow aloft strengthens as a weak cold front also passes west to east across our counties. Shower chances will continue west of a Douglas to Laramie line along the cold front and baroclinic band, otherwise dry.
Mostly clear skies are already in place across the southwest part of the forecast area and high pressure building east from the MS valley will bring clearing skies to the remainder of the area tonight. With the ridge axis just moving over us later tonight should not have too much of a ridge valley temperature difference though. With high pressure shifting east of the area Saturday afternoon a significant warming trend will begin. The ridge valley temperature split for Saturday night is not something the blended data used for initialization handles very well.
With clear skies expected and diminishing winds, overnight lows will fall to near freezing across much of the area, and low lying spots will be a few degrees cooler.
338 PM EDT Fri Apr 7 2017 High pressure will bring dry and quiet weather through the weekend.
Amplified mid and upper level trough from northeast U. Highs rebound easily and fcst highs are placed in the lower 70s inland and near 69/70 at the coast.
255 PM MDT Fri Apr 7 2017 Large amplitude trough and cold air mass moving onshore the Pacific NW today will tighten the gradient between the high pressure in place over the next 24 hours and will bring a 90 to 100 kt upper level jet into the region Saturday afternoon.
High pressure will be west of the area today and then slide into the area by this evening.
323 PM CDT Fri Apr 7 2017 South winds have returned this afternoon in response to strengthening westerlies over the Rocky Mountains, resulting in warmer temperatures today, and a milder night expected for tonight.
Synoptic Setup: Short term begins with a Ridge running from the High Plains of New Mexico through eastern Montana to western Saskatchewan. A large trough of equal size is set off the coast of northern California to the Gulf of Alaska. This afternoon through tonight: Ridge will exit the area this afternoon turning the flow aloft to a more southwest pattern. Saturday: A meso-ridge will move through the area over these 12 hours and free up a lot of partly cloudy skies and dry conditions to infest the area.
259 PM EDT Fri Apr 7 2017 An upper level trough will gradually lose its grip on the area on Saturday.
After a mild overnight, the upper level ridge axis, currently over central New Mexico will pivot east into the Central Plains by Saturday evening. Mostly southerly and moderate surface flow, 15-20 knots, overnight will eventually begin to veer southwesterly as the ridge shifts east and stronger mid-level flow out ahead of an upper level trough begins to mix stronger winds aloft toward the surface.
High pressure is building into the SE from the lower MS river valley and will keep North and Central Georgia dry through the short term. With this ridge building in. At this time, it appears most areas will remain above freezing, but forecast trends will be monitored for any light freeze/frost concerns Saturday morning.
Surface analysis this morning places a 1026 mb ridge of high pressure over the Middle and Lower Mississippi Valleys. Clear skies prevail across the region as a 1026 mb high pressure system builds in. High pressure will move directly over the region by evening.
At upper levels, an amplified ridge extended across the central Plains northward across Manitoba/Ontario towards Hudson Bay. At the surface, the Front Range trough will move east and approach the western ND border late this afternoon. We are expecting a very mild day with highs ranging from the lower 60s in the Turtle Mountains to the 70s over the western half of the state - even approaching the 80 degree mark in the far southwest. Southeasterly winds will become westerly behind the trough. A mild night as well with Pacific air moving in behind the trough. Upper level ridge moves east towards the Great Lakes Saturday, with a longwave trough over the west coast.
340 PM CDT Fri Apr 7 2017 High pressure at sfc and aloft with dry cloud free airmass.
At the surface, north winds begin to weaken across the area into Friday night as high pressure builds in from the west and the pressure gradient over the local area relaxes.
245 PM MST Fri Apr 7 2017 A Pacific low pressure system and associated front will swing into the western states this weekend resulting in strengthening winds on Saturday. Precipitation chances will be focused across the northern half of Arizona, and will be minimal across the lower deserts.
A longwave trough sitting off the West coast was producing increasing sw flow aloft over the Four Corners. Temps have warmed into the 70s to lower 80s for the e plains, and in the 60s to near 70F for the high valleys. Increasing west to southwest flow across the forecast area through tomorrow, with warmer temp readings forecast for Saturday aftn. Tomorrow, look for max temps in the mid 70s to mid 80s for the plains, and 60s to around 70F for the high valleys.
While most areas should decouple enough to let overnight speeds tame down, expect winds to remain more enhanced in the higher elevations of southwest Minnesota. Does not appear to be optimal direction for acceleration of winds on the downslope side of the Buffalo Ridge, but could be something to monitor throughout the evening. Good mixing should still result in breezy conditions, though, and have favored wind speeds on the higher end of guidance. With the aforementioned mixing and strong warming aloft ahead of the front, along with relatively dry ground, will continue to favor the warmer guidance options for highs on Saturday.
Combination of mixing, filtered solar and modest warm advection should allow temperatures to get into the higher 50s into the 60s. Region will transition into sw flow aloft Saturday as upper ridge shifts east. Timing of cold front will affect temperatures however with initial warm column will see some of the warmest temperatures so far this spring.
528 PM EDT Fri Apr 7 2017 Low pressure in the Northeast States and high pressure building across the Lower Mississippi River Valley will cause dry northwest flow over the region, and breezy winds this evening.
Thinking that recent rains will actually have an impact on temperatures and generally shaded a degree or two warmer on lows.
With high pressure in control, weather across SE TX to remain quiet.
142 PM EDT Fri Apr 7 2017 Gusty west winds will continue today as strong low pressure lingers over the northeastern United States. Temperatures will average below normal through Saturday as high pressure builds in from the northwest.
155 PM EDT Fri Apr 7 2017 An upper trough will move to the east today. The cu development on the back side of the lower stratus is weakening and should mix out in all but the far eastern portion of the CWA in the next few hours. As high pressure builds into the region expect cloud cover to diminish and winds to decrease. Went with a freeze warning across the eastern half of the area where there is more confidence in less cloud cover and cooler temperatures. With the potential for some clouds to move in later into western portions of the area went slightly warmer with temperatures for now and went with a frost advisory. Ridging aloft and southerly low level flow will result in warming with dry conditions early in the period.
Upper level heights will rise today as the deep upper level trough/low centered over the northeast US continues moving eastward.
115 PM CDT Fri Apr 7 2017 Deep northwest flow continues aloft across the eastern half or so of the United States this morning, as a large upper level low spins over upstate New York. At the surface, high pressure is settling southeast into the Ozarks. Clear skies and light winds will allow temperatures to fall into the mid 30s by daybreak, with some of the lower lying areas/valleys perhaps approaching the freezing mark. This persistent southerly breeze will keep temperatures on the warmer side tonight, with lows expected to range from the mid 40s east to low to mid 50s west.
310 PM CDT Fri Apr 7 2017 231 pm CDT Finally a breather in the weather department with high pressure moving in tonight. Expect winds to finally slacken off as the ridge axis shifts in.
The short term forecast will be determined by a weak ridge/westerly flow pattern that will bring above normal temperatures and very dry air to the area.
/Issued 421 PM CDT Fri Apr 7 2017/ Upper level ridge building into southern plains will per water vapor imagery will keep conditions dry and warm over the Panhandles for the next few days. Lee troughing mainly due to differential heating this afternoon and again Saturday will lead to breezy conditions across the Panhandles. Tomorrow, the ridge axis will cross the area along with an 850mb thermal ridge developing across the plains.
120 PM EDT Fri Apr 7 2017 Snow showers will taper off this afternoon, ending last in the high terrain. High pressure will build overhead through the weekend, bringing the return of dry and seasonable conditions. Will maintain snow shower chances through the afternoon, with the best chance for additional accumulation in the ridges, albeit mainly on grassy surfaces. Upslope snow will end this evening as high pressure builds at the surface and aloft. Radiational cooling will support below average temperatures, especially in the ridges where there will be fresh snow cover. Upper level ridge will settle overhead through the start of the week with dry conditions expected.
Axis of high pressure will slide off to the southeast tonight, with a steady push of warm air advection into the region on Saturday. So, highs there will be much cooler.
258 PM EDT Fri Apr 7 2017 High pressure has settled into the Mississippi River Valley near the Gulf Coast, spilling south and east as a large mid latitude cyclone concedes real estate across the northeast United States. Northerly winds will increase to 18 - 22 knots across the coastal waters of the Florida Keys, dropping temperatures into the lower to mid 60s in the lower and middle Keys, and the upper 50s in the upper Keys. A weak short wave across eastern Texas is readily apparent on water vapor imagery, although this feature has little connection to the lower or mid troposphere. Winds will collapse quickly Saturday afternoon as the cold air advection ceases, the gradient relaxes due to mainland heating, and the waves erode the ridge.
126 PM EDT Fri Apr 7 2017 Aviation Drier and warmer weather is expected today with highs around 50.
A strong low pressure center is centered approximately 140 miles off the coast of northern Oregon and southern Washington. This low will continue to bring a strong pressure gradient across the area today as it moves north. A showery pattern is expected today and tonight as the low moves north and an upper trough moves into the area late tonight. However, with a trough over the area and as an area of instability moves inland, expect widespread showers to develop late Saturday morning and Saturday afternoon as well a slight chance of thunderstorms. Overall, expect conditions to vary from VFR to MVFR, with the lowest conditions in and around showers. With freezing levels lowering quickly, conditions could lower to IFR in those areas at times.
A weak upper trough will move across the Central Plains tonight with the best chances for thunderstorms, around 40 percent, in the Pratt to Medicine Lodge areas. For Friday, a strong upper level trough moving across the Central Plains will push a strong cold front cold front across western Kansas. There will be a chance for some strong to severe storms with the cold front. The cold front will be near Dodge City around 3 pm, then through Medicine Lodge and the rest of southwest Kansas by around 6 to 7 pm.
Light rain will linger over the coast and parts of the interior this evening as a weak cold front moves into Western Washington.
(Issued 237 PM CDT WED SEP 7 2016) At 19z, the persistent upper level ridge axis was across the southeast U. Temps were ranging from the upper 80s in northeast Alabama to the lower 90s elsewhere. In the short term, the models are fairly similar in slowly breaking down the upper level ridge axis and allowing a weakening cold front to move southeast toward the region between Thursday and Friday.
Moisture over Arizona associated with post-tropical cyclone Newton will move away to the east tonight and Thursday. The brush with the northwest periphery of now Post-Tropical Cyclone Newton has resulted in a few light showers over Hualapai Mountain and moderate showers southeast of Wikieup. Dry northwest flow aloft will continue across the rest of the region through Thursday then a weak dry upper low will approach the southern California coast Friday and start to move inland Friday night.
/issued 411 PM CDT WED SEP 7 2016/ A large ridge of high pressure with very dry air in the mid and upper levels over most of the southeast states (very well defined in water vapor imagery) will continue to dominate over the region through Thursday. The active easterlies in the Gulf will continue to stream weak waves and surges of higher moisture from south Florida and east central Gulf into the northwest Gulf and western Gulf coast over the next few days, and an upper low over the southeast Gulf is expected to move steadily west across the southern Gulf through Thursday.
1025 PM MDT WED SEP 7 2016 Current surface map shows cold front moving through central South Dakota, with convection east of the forecast area. For tonight, high pressure builds across the western Dakotas with light winds and cool temperatures. Brief period of return flow on back side of high Thursday morning, with surface trof moving through western South Dakota Thursday afternoon. Gusty west winds will develop behind the trof. with some showers/isold storms developing in the wake of a departing cold front.
Temperatures are in the lower 90s with heat index values in the middle 90s to near 100 degrees. An upper level trough will then dive across the Plains and through the area Friday into Friday night. This will send a cold front south through the region. Deep layer shear will increase with the approaching trough to support a severe storm risk with damaging straight line wind gusts and large hail the main risk generally north of I-44 Friday evening.
933 PM EDT WED SEP 7 2016 The forecast is in pretty good shape this evening with high pressure bring th dominant weather feature. Lows tonight will range from around 3-8 degrees above normal with the higher heights aloft. Chattanooga Airport, TN 69 95 70 94 / 0 0 10 10 Knoxville McGhee Tyson Airport, TN 66 94 68 93 / 0 0 10 10 Oak Ridge, TN 66 94 68 93 / 0 0 10 10 Tri Cities Airport, TN 60 91 64 91 / 0 0 10 10.
A dry deep layer airmass will remain in place across the region tonight underneath a ridge of high pressure aloft. For tonight, with subsidence from the upper high west of the fa counteracting the dry airmass over the fa, overnight temps around to a degree or two above seasonal expected (generally mid to upper 60s). For Thursday, the dry airmass works with the declining, but still present subsidence, from the weakening upper high to bring another day of above seasonal temps to the area. Highs in the low to mid 90s expected.
The atmosphere should begin to decouple tonight mainly in the Nebraska Panhandle east of the lee side trof where residual low level moisture is still in place with dewpoints at KSNY currently in the lower 50s. The exception will be in the southern Nebraska panhandle where the lee side trof may stall out in the afternoon which may limit the mixing potential.
Main change with this forecast package will be to increase the high clouds and hold onto them longer as it looks like the north edge of this will not move much overnight and then slide east during the day. Hints of being slightly warmer and drier tomorrow but really not much of a change. Next upper level trof will sweep across the region late Thursday and Friday as associated cold front drops over the plains late Thursday night and Friday morning. Cooler temperatures behind the front for Friday afternoon with readings back in the 70s across lower elevations.
726 PM EDT WED SEP 7 2016 Aviation A slow moving cold front will trigger several rounds of showers and thunderstorms across the region through tonight. High pressure will gradually move in later Thursday into Thursday night leading to a slightly drier airmass.