Aikyam-Lab/Synoptic-Bench huggingface dataset:
1056 AM MDT WED AUG 31 2016 The current satellite water vapor image is showing a ridge of high pressure in position over the Great Basin and Rocky mountain states this morning. Mostly clear skies are being reported around the area this morning beneath the ridge of high pressure. All three models maintain a ridge of high pressure over the forecast area through Thursday. The Pacific closed low will move onshore over Washington by Thursday as moist southwest flow increases over the region.
748 AM EDT WED AUG 31 2016 Aviation A cold front will move south of the state this afternoon, taking the high humidity and scattered showers with it. A secondary cold front and upper low will probably result in considerable cloudiness and scattered light rain showers on Thursday, particularly east of Highway 131. However a low chance of storms could arrive on Labor Day as warmer and more humid air arrives. The first is southeast of GRR and is associated with the actual cold front. Cold advection/thermal troughing at h8 and a moist low level nne flow off lake huron should lead to considerable stratocumulus clouds and sprinkles or light showers, especially before 18z.
The upper level high that was centered over the area for the past few days has shifted westward and is centered over the Tulsa OK area. This upper high will continue to shift further westward today as a weak upper level wave swings down toward us from the north. Given the high PW values, any of the storms that form will be capable of heavy rainfall and possible localized flooding, although mid level lapse rates are rather weak.
Mid TN was experiencing hot and typically humid conditions under a weakening upper level ridge. A trough was beginning to dig over the eastern states with a surface cold front across the midwest. Over the next couple of days, the trough and front will help kick the tropical systems off toward the northeast while bringing some very nice conditions into Mid TN. Temperatures will top out in the low to mid 90s, except upper 80s Plateau. Weather pattern to remain similar today to last few days as upper high hangs tight for another day. Changes likely tonight as upper trough axis approaches overnight and not only brings the possibility of isolated storms but likely deck of lower clouds toward 12z.
327 AM EST Fri Jan 13 2017 Warm air will surge ahead of a cold front today. By the time a cold front noses southward along the leading edge of high pressure, we will have already climbed almost 20 degrees above normal for January 13th. A little messier and a little cooler over the weekend but not necessarily wet.
1207 AM EST Fri Jan 13 2017 Colder temperatures will spread across the region overnight into Friday behind a departing cold front. Residual showers in that area will continue to diminish as the supporting cold front ploughs east, and southward. Building high pressure and resultant veering and weakening of boundary layer flow should support cloud diminishment today. That system is expected to spread a wintry mix, highlighted by freezing rain, along the aforementioned frontal boundary, which will stall, then develop toward the I 70 corridor as a warm front with the advance of the disturbance. Model trends continue to focus precip on areas south of Pittsburgh, especially the I 70 corridor and ridge zones.
1004 PM CST Thu Jan 12 2017 At 0330z, a cold front was located from northwest Smith County, to Daingerfield, to near De Queen. Lower clouds in MVFR category below 3 kft developing/affecting parts of Northeast Texas, Southeast Oklahoma, and Southwest Arkansas near a cold front between 13/04Z to 13/07Z and may see light rain or drizzle at times. Surface winds will be South to Southeast 3-8 knots overnight ahead of the cold front moving into the area from the Northwest, with winds shifting to the East or Northeast 5-10 knots with the backdoor front.
348 AM EST Fri Jan 13 2017 A cold front will bring sharply colder weather beginning tonight. Frontal showers have cleared the area except for the back edge in the Poconos, as well as a very light stripe along the actual cold front in the Western Catskills. Any residual light snow/flurries over NEPA should get pushed southward and out of the region Saturday night, as high pressure builds down from eastern Canada.
As the inversion gets stronger and shallower the fog should eventually find its way to the lower Treasure Valley.
/issued 208 PM CST Thu Jan 12 2017/ Upper trough over the West coast will develop into a closed low and dig south to Mexico Friday before swinging east. This low will move over Northern Mexico Saturday.
328 AM CST Fri Jan 13 2017 1041 hPa high pressure located over east central MN and NW WI this morning lead to temperatures from 4 degrees across the northern CWA to upper teens across the southern CWA. Short term forecast focuses on a quiet day today with the introduction some freezing rain across the very south tonight. Impacts from any freezing rain would be very minor in nature. Regardless, any impacts would be minor if the freezing rain occurs.
Upper ridge remains over the area Friday. Low clouds and patchy freezing fog will impact the taf sites tonight into Friday.
259 AM EST Fri Jan 13 2017 Warm air will surge ahead of a cold front today. By the time a cold front noses southward along the leading edge of high pressure, we will have already climbed almost 20 degrees above normal for January 13th. A little messier and a little cooler over the weekend but not necessarily wet.
153 AM EST Fri Jan 13 2017 A cold front will cross the region tonight through early Friday. High pressure will build across the region through the weekend. A cold front will cross the region overnight through early Friday, with a stronger cold front approaching northwest areas late. Overnight low temperatures will generally range through the 20s across northern areas, to the lower 30s Bangor and interior Downeast with mid 30s along the Downeast coast. a secondary cold front will cross the area during the day, with the true arctic air to follow. Highs will likely occur near daybreak, ranging from the lower 20s in the north and west to the lower 30s in Bangor and Downeast. Fairly quiet weather is expected for the weekend as two areas of high pressure move across the area.
freezing drizzle or light freezing rain may impact mainly southeast KS after 09z with the potential for all rain across far southeast KS by 17-18z as temperatures rise above freezing. periods of light freezing rain will remain likely with increasing probabilities arriving late in the night and as we move into Saturday. Precipitation will increase in coverage on Saturday as rich moisture is transported into the area ahead of the approaching mid/upper trough. Given the shallow nature of the modified low level airmass, confidence in steady and/or slow rising temperatures is beginning to increase as the higher precipitation rates arrive during the afternoon hours on Saturday.
303 AM CST Fri Jan 13 2017 High pressure continues to take up residence off the Atlantic Coast, with a westward extension covering about the east half of the Gulf of Mexico. Cold front extends from near New York City to northern Mississippi to central Texas. Ridging over the eastern Gulf of Mexico will move little through the weekend. 35 Medium range models continuing to struggle with eventual movement of upper low currently near San Francisco.
344 AM EST Fri Jan 13 2017 Colder air will be moving into the area today behind a cold front that has exited the North Country. High pressure builds down from Canada tonight and Saturday. Colder air continues to move into the area early this morning with cold front now well east of the area. Skies become clear tonight and winds will taper off as high pressure builds into the region. No precipitation is expected tonight or Saturday for that matter with high pressure over the area. A broad dome of high pressure will be cresting aloft leading to quiet sensible weather and mostly clear skies.
Upper air analysis last evening showed a trough over the west coast and west-southwesterly flow over Texas. At the surface, a cold front stretched from a low over southeastern Oklahoma to Waco to San Angelo.
A broad upper high extends across the southeast U. On the surface, strong high pressure near Bermuda continues to hold a grip on the southeast U. With this high pressure dominating the weather pattern, we can also expect rain free conditions and above average temperatures through the remainder of the week and into the weekend.
Primary weather concerns of mixed type pcpn remains well south of the area near the arctic cold front extending from the Central Plains to the Ohio Valley region.
1221 AM CST Fri Jan 13 2017 The center of the surface arctic high pressure was over Minnesota. Arctic high pressure across western and central North Dakota this afternoon will propagate into the Upper Mississippi Valley Friday morning. Surface arctic high center was over Minnesota with broad low pressure along the Lee of the Rockies.
437 AM EST Fri Jan 13 2017 A cold front passed through the region overnight, and was about to stall early this morning as it tried to make its way through TN.
/issued 303 AM CST Fri Jan 13 2017/ High pressure continues to take up residence off the Atlantic Coast, with a westward extension covering about the east half of the Gulf of Mexico. Cold front extends from near New York City to northern Mississippi to central Texas. Ridging over the eastern Gulf of Mexico will move little through the weekend. 35 Medium range models continuing to struggle with eventual movement of upper low currently near San Francisco.
1245 AM EST Fri Jan 13 2017 Aviation High pressure will build in from the northwest and bring fair weather with decreasing cloud cover tonight.
1151 PM EST Thu Jan 12 2017 A cold front across the southern end of the area will continue to move south tonight. High pressure over Minnesota early Friday will pass to the north of the local area by early Saturday.
214 AM MST Fri Jan 13 2017 Current surface map places arctic high across the eastern Dakotas into Minnesota with trof across Montana and Wyoming. Low level warm advection will push highs in the lower 30s for the higher elevations of northeast Wyoming into the Black Hills. Dry weather will continue into Saturday with temperatures a few degrees warmer.
The low level ceilings will be moving North to the interstate 20 corridor of East and Northeast Texas and Northwest and North Central Louisiana. Also around 13/12z to 13/14Z another cold front attempts to backdoor into area to near an KELD, KTXK and KDEQ line. Surface winds will be South to Southeast 3-8 knots overnight ahead of the cold front moving into the area from the Northwest, with winds shifting to the East or Northeast 5-10 knots with the backdoor front. /issued 1004 PM CST Thu Jan 12 2017/ At 0330z, a cold front was located from northwest Smith County, to Daingerfield, to near De Queen.
1041 PM MST Thu Jan 12 2017 Water vapor shows nearly zonal flow over the northern plains with upper low over CA. ridge covers the cntrl Dakotas. On Friday, warmer air will usher into the cwfa behind the departing wave. Temps expected to rise to near and even slightly above freezing over parts of northeast WY, southwest SD, and the Blkhls.
A closed upper low will cross Baja Mexico, to the south of Arizona on Saturday as an upper ridge extends from the southeastern U.
1234 AM EST Fri Jan 13 2017 A slow moving cold front currently stretches across East Tennessee with post-frontal showers in Kentucky.
113 AM EST Fri Jan 13 2017 A cold front will bring sharply colder weather beginning tonight. Frontal showers have cleared the area except for the back edge in the Poconos, as well as a very light stripe along the actual cold front in the Western Catskills. Weak trough slides by Saturday night but is unlikely to trigger much if any weather, perhaps some very light snow over the extreme southern counties of northeast Pennsylvania.
1038 PM CST Thu Jan 12 2017 A true arctic cold front moved across the Dakotas and parts of Minnesota this morning.
Arctic high pressure was centered over Minnesota. The lowest temperatures in ND were over central and eastern ND where temperatures were in the teens and 20s below zero. Over southwestern ND warm advection was taking place with southerly winds of 5 to 15 mph were allowing the low/surface level to mix with the warming aloft. Surface arctic high center was over Minnesota with broad low pressure along the Lee of the Rockies.
/issued 910 PM CST Thu Jan 12 2017/ A cold front is moving through the Mid-South and is currently roughly parallel and just south of I-40. Given how rapid cold air is filtering into the Bootheel will keep the slight chance of freezing rain in the forecast for northern Randolph. with the approaching arctic cold front just passing through Malden Missouri.
Freezing rain will plague KBVO for much of the period with freezing rain possible at KTUL, KRVS, KXNA and KROG late Tonight into Friday morning. Freezing Rain Advisory until noon CST Friday for OKZ057-058- 060>067. Freezing Rain Advisory from 6 PM Friday to noon CST Saturday for OKZ057-058-060-061-064-065.
The cold front currently stretches across the forecast area. Current water vapor imagery and RAP upper air analysis indicates an upper level trough to the north of the Great Lakes with a ridge across Florida and the Gulf of Mexico. Cold advection behind the boundary will remain to the north and expect above normal temperatures today with highs ranging from the low 50s across SW VA and the Northern Plateau to upper 60s in the Southern Valley. Again, any rainfall that does fall during the short-term period will be light with amounts of around a tenth of an inch being on the high side.
Thus high temps may be able to reach the lower 20s in far se WI today with teens elsewhere.
311 AM EST Fri Jan 13 2017 The upper wave now rotating into northern Quebec drove arctic air across the Great Lakes region yesterday afternoon through last night and forced the low level moisture gradient well south of the state. Fairly stable mid levels and the brief nature of the forcing (not to mention the dry arctic air in the low levels) will support just a slight chance for some light snow late tonight into Sat morning with this feature.
Reinforcing high pressure bridges a shunted front meandering over the southeast by Saturday. On this date in Key West weather history, the temperature plummeted to 41F, which not only set the daily record for the minimum temperature on January 13th, but it also tied as the lowest temperature ever recorded in Key West.
As long as the echoes remain scattered, it may keep a widespread area, at least initially, from wet-bulbing down below freezing where temps currently are above 32 degrees. Although still think as we go through the morning hours much of the the area under the advisory/warning will drop to or below the freezing mark with icing becoming a problem. As we go through the day on Saturday, models still show some warming and the freezing line beginning to retreat back to the north and west. The freezing line looks to be north of the interstate 40 corridor by late in the day. Much of northern/northwestern Oklahoma will remain at or just below freezing with some ice accumulations continuing.
01 UTC surface analysis shows a NE to SW oriented ridge of high pressure across the Western Atlantic, much like 24 hours ago. The ridge extends a little further westward this evening and this has resulted in light SE winds from early this afternoon now essentially calm across the region. Low level high pressure will build in from the east, allowing deep layer ridging to stack over the southeast.
Main upper low responsible for this weekend's storm system is currently centered across northern California. Currently towards the sfc, expansive area of high pressure has chilled temps down to the 20s this afternoon, falling into the teens tonight as the ridge axis gradually slides eastward on Friday. The models are still struggling with how far north to bring the freezing rain on Friday and Saturday. Therefore I'm not sure why some of the models have limited QPF until the main low pressure lifts out. Light freezing rain and possibly freezing drizzle looks to stay confined to south east and east central KS late Friday morning and afternoon. Another round of freezing rain looks likely at some point on Saturday.
119 AM EST Wed Feb 15 2017 Low pressure to the south today. Cold front late tonight into Wednesday.
Some gusts into the low-20 knots range expected for a period during the late morning hours/early afternoon hours.
Currently, a strong meridional upper level ridge over the Rockies extended northward into northwestern Canada with low pressure over eastern Canada. At the surface, a cold high pressure axis was over the Red River Valley, with a warm front oriented north-south across central ND. A cool moist shallow surface layer was in place along and east of the warm front. The warm front is forecast to move east into the James Valley later this morning, reaching the Red River Valley this evening. Thinking the areas of fog along the Coteau will linger for much of this morning, until more southwesterly winds behind the warm front help dissipate the fog from west to east. Meanwhile, the upper level ridge nudges eastward into the Front Range, and significant warm advection at low and mid levels moves into ND from the west.
Low level cold air advection moved through late last night and early this morning, with the eastern edge of the upper ridge now on our doorstep. This trend will only continue through the day as a ridge of high pressure slowly works through our area. As the ridge axis works through southerly flow will develop in western MN first, around 5-10 MPH. Low level warm air advection will be ongoing as the thermal ridge starts building in later today, coinciding with the southerly flow that will develop. Given the recent trend of temperatures over-achieving on highs, went with on the warmer side for highs today and expect far western MN to warm into the upper 40s, with 50 degrees not out of the question.
336 AM EST Wed Feb 15 2017 A cold front will pass through the region this morning.
1026 PM MST Tue Feb 14 2017 Upper level ridging is building eastward into the Northern and Central Rockies toward the plains, with a closed upper low over Texas/Oklahoma. Mixing heights are limiting potential gusts this afternoon, however we will still see 15-20kt winds prevail through the early evening before decoupling of the low levels takes place. Some warmer guidance is indicating potential for mid 60s.
Isolated strong to severe storms are possible due to the high shear/marginal instability environment. Main concern will be over the higher elevations of north Georgia where near Wind Advisory conditions are possible. Expected temperatures are slightly warmer than previously forecast as clearing is expected during peak insolation/heating today. Although north Georgia may settle in the 50s, the southern zones could see temperatures in the low 70s.
1257 AM EST Wed Feb 15 2017 A cold front will move across the region tonight.
The main focus for the overnight period will be the potential for a few isolated severe storms through 7z as the cold front pushes through the area.
429 AM EST Wed Feb 15 2017 A cold front will push south through the region this morning.
500mb heights will slowly rise through the day as a ridge of high pressure builds in. As a result, high temperatures will be slightly warmer on Wednesday by two or three degrees in most locations.
336 AM EST Wed Feb 15 2017 A cold front will cross the area this coming morning, with snow showers and squalls.
An upper low over the Great Lakes is dropping lower heights into MN and northeast SD today. Winds will diminish tonight as the low shifts farther east. Upper ridging will build in for the remainder of the short term forecast.
307 AM CST Wed Feb 15 2017 Little change with clear skies and light northwest flow as high pressure moves in. Upper ridging to move in late this week bringing more dry weather the next several days with warmer temps into the 50s and 60s for highs this weekend. mostly sunny to sunny and cooler but still slightly above normal most locations. Highs in the middle 30s far north and northeast into the lower 40s most locations in the southwest 1/2 to 2/3 of the forecast area. Lows in the lower 20s north and east to the middle/upper 20s south and west with a light to moderate frost expected toward morning most locations by daybreak. If anything the models are playing catch up with the high temps and could be even higher than what is currently forecast.
413 AM EST Wed Feb 15 2017 Low pressure moving into the forecast area this morning will merge with a cold front and move off the coast this afternoon.
1137 PM CST Tue Feb 14 2017 Overall pattern in the upper levels locally puts us within north/northwest flow as a closed slow travels east across the southern Plains and an amplified ridge to the west that is heading our way.
301 AM CST Wed Feb 15 2017 Flow aloft has become more northerly over the Central Plains, as the upper low to our south yesterday continues to moves off to the east. Advection changes from cool to warm rather quickly, and as the surface trof translates over our forecast area in the afternoon, think this will bode well for some better mixing.
/ISSUED 404 PM CST Tue Feb 14 2017/ Much quieter weather across SE TX this afternoon (when compared to this morning) with the passage of the storms/cold front. The cooler/drier airmass filtering into the area from the NW should hold the next couple of days, but changes will be coming by the end of the week. A more progressive weather pattern for the middle to long-range portions of the forecast as a series of upper trofs/lows move across the state from the west. with another possibly next Tue (perhaps with an accompanying weak cold front). As high pressure builds into the region.
High pressure aloft will expand across the interior west, resulting in dry and stable conditions through the midweek. The current large-scale pattern shows a ridge building into Utah, which will keep a dry and stable airmass in place through tomorrow night. Clear skies this evening has allowed for efficient radiative cooling, so temperatures have fallen quickly despite the warmer afternoon.
Water vapor loop indicated a short wave trough from WI to southeast Ontario. North-south upper jet was diving south on the west side of the trough. Warm up begins tomorrow as ridge axis shifts east allowing for return flow and respectable warm advection.
1117 PM CST Tue Feb 14 2017 An upper low was evident via water vapor imagery dropping southeastward towards Lake Superior early this afternoon. A secondary cold front has been sliding south across the region, but the stronger 925 mb cold advection has been farther north through early afternoon. A very transitory cooler air mass behind the cold front will drop across the region this evening and tonight with temps falling back closer to seasonal averages. Winds will subside heading into Wednesday as surface ridging passes over the area. Mid/upper level ridging will spread into the Northern Plains and Upper Midwest and remain largely in place through the weekend.
225 AM MST Wed Feb 15 2017 Upper blocking pattern has set up across the western to central CONUS with upper ridging slowly building into the region. Strong surface ridging sits across the northern to central plains.
354 AM CST Wed Feb 15 2017 Sharp ridge over the western CONUS between Aleutian low and upper low over the Great Lakes. Ridge extends over western Canada and north to the Arctic Circle. Strong upper level ridging across much of the western US will keep conditions dry across Nebraska through the end of the week and into the weekend.
359 AM CST Wed Feb 15 2017 Low level clouds remain entrenched across the area this morning as the cold front that brought the squall line yesterday has moved into the Florida panhandle.