Aikyam-Lab/Synoptic-Bench huggingface dataset:
540 AM EDT SAT SEP 3 2016 High pressure will continue to build out out of the northern Great Lakes and into northern New England today. The high pressure venter shifts offshore late tonight but keeps a hold over the region.
319 AM CDT SAT SEP 3 2016 Early this morning a broad mid-level ridge was stretched across the eastern CONUS with a mid-level trough tracking across the northwestern U. With the expected increasing low and mid-level cloud cover today, have continued to trend a bit cooler with temperatures with highs in the upper 70s to around 80 degrees. Overnight low temperatures will range from the low to mid 60s from east to west with the increasing cloud cover helping to keep temperatures a few degrees warmer across central KS. but keeping the bulk of any passing short wave trough energy to the north at least through mid week.
222 AM EDT SAT SEP 3 2016 A large area of high pressure, covering the Great Lakes and much of the Northeastern U.
The disturbance moves east starting Labor Day as a building upper level high pressure system brings a return of near to slightly above normal temperatures for the coming work week.
429 AM CDT Sat Sep 3 2016 Surface analysis this morning shows drier air over the ARKLATEX with still quite a bit of moisture over SE Texas with dewpoints in the low/mid 70s. Upper level ridging will be looking to expand over the southern U.
251 AM MDT SAT SEP 3 2016 Water vapor shows deep upper trof over the pac nw with sw flow aloft through the nrn plains. Temps should be about 10 degrees cooler behind the front from nern WY into nwrn SD. Upper trough will remain across the western US early in the week then slowly move east across the plains midweek.
A large high pressure area will prevail from the ern Great Lakes into New England while the high amplitude but narrow upper ridge over WI shifts ewd for tonight. Ridging will hold strong over the mid Mississippi River Valley.
143 AM EDT SAT SEP 3 2016 Crystal-clear skies in place across northern MI, thanks to high pressure directly overhead.
655 AM EDT SAT SEP 3 2016 Strong high pressure over the Great Lakes region will gradually pull eastward into southeast Canada through Labor Day.
Dew points are in the 50s well to the south of us, so the best moisture arrival will hold off until later this afternoon as the 60 dew points pooling under the trough axis arrive.
Aloft, troughing rules across the West and off the Eastern Seaboard, with ridging nosed in across the center of the CONUS. The central CONUS upper ridge will gradually build in across the Ohio and Tennessee valleys through the short term, allowing for a little warmer highs across the area, but a continued Less humid air mass. Expect lows in the 50s once again tonight, with highs a touch warmer on Sunday, more solidly in the lower 80s. High pressure to our north will keep VFR conditions in place through the majority of the period. The only exception will be in the 16 to 20z time frame, when a few gusts to around 15 kts will be possible across the broader valleys and ridgetops.
The unsettled weather will continue on Saturday as the Pacific trough drops further into the Great Basin. With the exception of a few isolated storms over the higher terrain early Sunday morning, drier weather is expected.
622 AM EDT SAT SEP 3 2016 High pressure will remain in place across the region through the Labor Day weekend. Hermine will remain just off the mid atlantic coast through the Labor Weekend as high pressure and subsidence remain in place across the Ohio Valley region.
1239 PM CDT WED APR 27 2016 THE MID/UPPER TROUGH RESPONSIBLE FOR THE RECENT ACTIVE WEATHER IS PROGGED TO MOVE SLOWLY EAST/NORTHEAST ACROSS THE CENTRAL PLAINS STATES TODAY. MAINTAINED MORNING POPS ACROSS PORTIONS OF CENTRAL KS WHERE STEEP MID-LVL LAPSE RATES WILL LINGER EARLY IN THE PERIOD UNDER THE MID/UPPER TROUGH.
A ZONE OF ISENTROPIC UPGLIDE WITH EASTWARD PROGRESSING LOW LEVEL THERMAL RIDGE AND VORTICITY ADVECTION ASSOCIATED WITH WEAKENING MID/UPPER LEVEL TROUGH SHOULD BE SUFFICIENT FOR SCATTERED-NUMEROUS SHOWERS DURING THE DAY THURSDAY.
A COLD FRONT WILL SLOWLY MOVE EAST THROUGH AR THIS AFTERNOON TO EVENING. SPC HAS LOWERED AR TO ONLY A MARGINAL THREAT THIS AFTERNOON TO EVENING WITH THE COLD FRONT. ISOLATED/SCATTERED STORMS COULD POP UP IN THE EASTERN HALF OF THE STATE AS A COLD FRONT CROSSES THE REGION.
324 PM CDT WED APR 27 2016 TONIGHT-THU: UPPER LOW CONTINUES TO EXIT AREA. DIFFLUENT UPPER FLOW AHEAD OF NEXT UPPER TROUGH WILL ALLOW STORMS TO MOVE NE THROUGHOUT THE NIGHT. -HOWERTON WESTERN US UPPER TROUGH WILL RELOAD EARLY IN THE PERIOD. THE MORE PROGRESSIVE ECMWF EJECTS TROUGH INTO THE PLAINS WHILE GFS FILLS LOW WHILE LAGGING OVER THE WESTERN US. WITH CAVEAT THAT TEMPERATURES COULD BE SIGNIFICANTLY WARMER IF DRIER/MORE DOWNSLOPE ECMWF VERIFIES LATE IN THE PERIOD. -HOWERTON CYCLONIC FLOW AND COLD ADVECTION ON THE BACK SIDE OF LOW PRESSURE DEPARTING OVER EASTERN NEBRASKA WILL SUPPORT HIGH MVFR TO LOW VFR CIGS THROUGH MID-AFTERNOON OR SO.
BUT CLOUDS AND WIND WILL INCREASE THIS AFTERNOON AND EVENING AS A LOW PRESSURE TROUGH MOVES INTO SOUTHERN CALIFORNIA.
LOW TEMPERATURES TONIGHT MAY GET DOWN TO NEAR FREEZING VALUES MAINLY ALONG A LINE FROM BAUDETTE TO PARK RAPIDS. DESPITE THAT TEMPS WILL DROP DOWN TO AROUND THE FREEZING POINT AGAIN SO THERE COULD BE SOME PATCHY FROST AROUND.
316 PM CDT WED APR 27 2016 UNSETTLED WEATHER WILL REMAIN THE NORM AROUND SOUTHEAST TX AS UPPER LOW DIGGING INTO NRN CA ESSENTIALLY REPLACES UPPER SYSTEM RESPONSIBLE FOR LAST NIGHTS SQUALL LINE AS IT EJECTS ACROSS THE CENTRAL PLAINS.
On the eastern periphery of western ridging and associated positive midlevel height anomalies, temperatures will be above average through Monday.
Tranquil weather conditions will prevail through the short term forecast under the influence of northwest flow aloft and a high pressure center that will push across the CWA on Monday. Mainly clear skies expect for a few high clouds spilling over the ridge across the Rockies and high plains. Morning low temperatures Monday morning will drop into the 20s to low 30s west to east with the warmer downsloping wind near the surface.
319 AM EST Mon Dec 21 2020 Conditions will improve over the next few days as high pressure builds in. A strong cold front will move across later in the week followed by a couple of days of very cold temperatures. High pressure will move offshore as a strong cold front moves into the area late in the period.
Upper trough currently over the region will move east today, being replaced by a ridge on Tues. On Wed, an upper trough deepens across the plains and pushes into the MS river valley Wed night. Moisture advection head across the mid-state will begin early and showers are expected to breakout in the afternoon as this upper trough, and its associated cold front draw closer. Wed night however is when the bulk of the pcpn is expected as the deep moisture axis pushes across, and the cold front moves into the area during the evening. On Thu, the cold front moves well east and the trailing upper trough axis moves east of us during the evening. Where the low-cloud deck is present, fog has decreased whereas where there are clear skies, there is IFR/LIFR vis due to fog.
with a low level trough eventually shifting winds to the northwest later this evening or overnight. With the brunt of the forcing associated with this wave well northeast of the local area and lack of saturation in the lower levels. expect heights aloft to begin a gradual climb as low pressure moves into the Pacific Northwest and the upper level ridge to our west begins its progression eastward.
331 AM CST Mon Dec 21 2020 A flattened upper level high pressure ridge over the desert southwest early this morning will transition east over the southern high plains later today. Southwest flow aloft will follow this ridge axis later tonight. Warmer air will be spreading in aloft not far off the surface.
Mild daytime conditions will continue through today before a dry cold front moves toward Arizona on Tuesday, with increasing southwest winds.
A warm front will approach from the southwest, and move through central Idaho and western Montana this morning. Light to moderate precipitation will therefore fall mostly as rain or a slushy rain snow mix for all but the highest terrain. The one exception will be across northwest Montana, where many valleys from Kalispell northward to the Canadian border have cooled off to below freezing. A period of snow, possibly mixing with light freezing rain will be possible through mid morning, before changing to rain by this afternoon. A strong Pacific cold front will approach from the west late this afternoon, moving through the region this evening into early Tuesday morning. A second cold front is expected to move into northwest Montana from the northeast Tuesday morning, setting up a boundary from roughly Eureka to Kalispell to Marias Pass.
606 AM CST Mon Dec 21 2020 (Today and tonight) Weak boundary will work south through the area this morning, bringing in an airmass off the higher terrain to our northwest.
356 AM CST Mon Dec 21 2020 The upper pattern across the CONUS shows the eastern trough working into the Appalachians with northwest flow back into the Pacific northwest with the trough responsible for a mid week system inching closer to the west coastal region. But, the GFS has shifted the surface and upper low further north.
This transition will come about as a longwave trof deepens over the Great Plains by midweek.
501 AM CST Mon Dec 21 2020 (Today and tonight) Weak upper level ridging today will result in above normal temperatures across West Central Texas. Overnight low temperatures will be in the mid 30s to lower 40s, although a few low lying locations may drop into the lower 30s.
Quiet weather will be on tap for Tuesday with ample sunshine and highs in the lower to middle 40s.
Temperatures today should be warmer, reaching the upper 40s to mid 50s, then mainly 50s on Tuesday.
Thus, given the borderline nature of these winds, coupled with the fact the sporadic gusts above 45 mph may be possible during peak mixing, have collaborated with neighbors to issue a Wind Advisory over the Buffalo Ridge/Iowa Great Lakes area between 15-22z. On Tuesday, expect warm air to surge into the region, as an upper level trough digs into the Northern Rockies and Northern Plains.
The upper pattern across the CONUS shows the eastern trough working into the Appalachians with northwest flow back into the Pacific northwest with the trough responsible for a mid week system inching closer to the west coastal region. But, the GFS has shifted the surface and upper low further north.
355 AM MST Mon Dec 21 2020 A fast west to northwest flow aloft prevailed between a upper ridge over the western CONUS and upper trough over the eastern CONUS. The High Wind Warning for Cheyenne, Wheatland, Laramie and Shirley Basin wil expire at 5 AM this morning, while the Warning continues for the wind-prone zones until 5 PM this afternoon.
A fast-moving low will push a warm front through the area this afternoon which will quickly be followed by a weak cold front. At the onset, current thinking has most of the I-80 corridor and eastern ridges seeing snow, the southern half of the CWA seeing rain, and a rain/snow mix somewhere in between. However, exact timing of the rain/snow transition lines remains uncertain due to the incoming cooler air aloft and slight wet-bulbing battling remnant warm advection at the sfc. Have issued a winter weather advisory for all of the eastern ridge counties, where 2 to 6 inches is expected. The highest amounts would be over eastern Tucker county.
High pressure will move east through the state today and skies should clear out enough this evening to get a nice view of the Great Conjunction of 2020.
440 AM MST Mon Dec 21 2020 A fast west to northwest flow aloft prevailed between a upper ridge over the western CONUS and upper trough over the eastern CONUS. The High Wind Warning for Cheyenne, Wheatland, Laramie and Shirley Basin wil expire at 5 AM this morning, while the Warning continues for the wind-prone zones until 5 PM this afternoon.
High pressure over the region through Tuesday will result in dry and mild weather with above normal temperatures.
(Today and tonight) Weak upper level ridging today will result in above normal temperatures across West Central Texas. Overnight low temperatures will be in the mid 30s to lower 40s, although a few low lying locations may drop into the lower 30s.
For tonight, with clear skies and weak high pressure persisting, another round of fog is anticipated as large T/Td crossover occurs again with lows in the mid/upper 30s - well below expected crossover temperatures in the low/mid 40s.
On the national weather map, upper flow will be out of the northwest today over the southern Plains between a trough over eastern Tennessee and an amplified ridge over the the Rockies. At the surface, high pressure will pass south of the state providing westerly winds this afternoon.
Despite this, should still see temperatures rise to the lower 60s due to clear skies and relatively warm temperatures aloft. Expect at least some breeze to continue into the nighttime hours as pressure gradient is maintained and a cold front approaches from CO/KS.
530 AM CST Mon Dec 21 2020 VFR and dry through the period with an upper level high pressure ridge passing overhead later today. /issued 331 AM CST Mon Dec 21 2020/ A flattened upper level high pressure ridge over the desert southwest early this morning will transition east over the southern high plains later today. Southwest flow aloft will follow this ridge axis later tonight. Warmer air will be spreading in aloft not far off the surface.
Strong high pressure will then build Tuesday through midweek promoting a period of dry weather across northwest CA.
/issued 305 AM CST Mon Dec 21 2020/ Upper ridge over the western states will build across the area today with the ridge axis moving across TX and OK on Tuesday. The next upper trough will move ashore the West Coast later tonight.
Breezy northwest winds will continue today as upper trough exits to the east. Winds will diminish by evening as high pressure briefly builds in. At the same time, ridging will build back in aloft. Both the ridge and the winds will support warm temperatures today and tonight with highs in the upper 30s/40s and lows in the 20s. Southerly winds pick up early Tuesday across the east on a llj ahead of an approaching low pressure system. Behind the low, winds will shift to the northwest and become very gusty again. With the southerly winds, good mixing, and ridging aloft, Tuesday will be the warmest day of the week by far and the last warm day for at least a week.
Areas of fog are possible along and east of the Coastal Plains this morning as light winds and moisture in the low levels provide the perfect environment for fog development. High pressure will prevail today. This, along with southerly winds, will keep temperatures on the warmer side today and tomorrow with highs in 70s.
Today through Tuesday: Chances for very light rain and maybe a few snow showers will linger from the late morning through the remainder of the day before a cold front swings through tonight. High pressure will then build in for Tuesday.
Variable winds between southwest and northwest and passing cirrus clouds are expected during the day today as an upper level trof axis moves through the region. /Issued 213 AM CST Mon Dec 21 2020/ The midweek system and associated cold front are the main items of interest in this forecast.
354 AM CST Mon Dec 21 2020 Latest water vapor imagery is showing a trough over the western Great Lakes that the HREF shows diving into the Ohio Valley later today. Mid and high clouds associated with this trough are staying over Illinois and will push east this morning. There is a cold front over Iowa and Nebraska that will move southeast across Missouri and Illinois later today. Dry weather is expected to continue tonight and Tuesday as the upper trough over the western CONUS will move into the Midwest by tomorrow. There will be a notable contrast in highs tomorrow from west to east as a warm front moves north into the region.
711 AM EST Mon Dec 21 2020 A cold front. slowly pushes east as high pressure builds into the western Gulf of Mexico today. This will usher in drier and slightly cooler air on northwest flow. A front sweeping across the waters as high pressure builds in to the west will keep robust to strong northwest to north winds in place for the next 18 hours or so. Winds begin to veer and diminish Tue and continue until late in the week when a cold front approaches from the west with increasing winds.
411 AM MST Mon Dec 21 2020 High clouds stream into the northern plains as an upper ridge builds over the western CONUS. At the surface, cold front is nearly through the CWA, and northwesterly winds remain gusty across portions of the western SD plains. As the upper ridge axis shifts over the central states over the next couple of days, dry and mild weather can be expected. Highs Tuesday could reach the 60s before a strong cold front moves in, but temperatures will depend on the timing of the front.
The high pressure aloft responsible for these above normal readings will breakdown as a system passes north of the area on Tuesday.
442 AM MST Mon Dec 21 2020 An upper trof and strong low pressure moving across the region will dominate the weather for the next few days. Today a ridge remains over the state with the upper trof approaching the Pacific Northwest. Lee trof will form along the front range and slowly shift east today. A band of precipitation will develop ahead of the front and lift northeast this afternoon and evening as the upper trof pushes through the Pacific Northwest. Rain is expected initially but freezing rain or snow is possible as temperatures drop this evening. Tight pressure gradient, cold air advection and strong upper jet behind the upper trof will bring windy conditions into eastern Montana Tuesday afternoon and evening. Wrap around precipitation will drop into the state Tuesday afternoon as the low moves east.
Upper trough currently over the region will move east today, being replaced by a ridge on Tues. On Wed, an upper trough deepens across the plains and pushes into the MS river valley Wed night. Moisture advection head across the mid-state will begin early and showers are expected to breakout in the afternoon as this upper trough, and its associated cold front draw closer. Wed night however is when the bulk of the pcpn is expected as the deep moisture axis pushes across, and the cold front moves into the area during the evening. On Thu, the cold front moves well east and the trailing upper trough axis moves east of us during the evening.
305 AM CST Mon Dec 21 2020 Upper ridge over the western states will build across the area today with the ridge axis moving across TX and OK on Tuesday. The next upper trough will move ashore the West Coast later tonight.
448 AM CST Mon Dec 21 2020 Breezy northwest winds will continue today as upper trough exits to the east. Winds will diminish by evening as high pressure briefly builds in. At the same time, ridging will build back in aloft. Both the ridge and the winds will support warm temperatures today and tonight with highs in the upper 30s/40s and lows in the 20s. Southerly winds pick up early Tuesday across the east on a llj ahead of an approaching low pressure system. Behind the low, winds will shift to the northwest and become very gusty again. With the southerly winds, good mixing, and ridging aloft, Tuesday will be the warmest day of the week by far and the last warm day for at least a week.
322 AM PST Mon Dec 21 2020 Last day of warm temperatures, inversions and light wind, before a cold front will bring breezy winds Monday night into Tuesday with a few light snow showers. Today will likely be the warmest day for a while, probably through the end of the year, with another fast moving cold front expected to move through the region tonight. Latest high resolution and ensemble guidance has come in drier with the cold front tonight.
1000 AM EST Mon Dec 21 2020 A cold front continues to push through the Florida Keys. Surface observations indicate the associated wind shift to the northwest has occurred for all locations along and west of the Lower Keys, with Smith Shoal recently reporting sustained winds near 13 knots.
Where the low-cloud deck is present, fog has decreased whereas where there are clear skies, there is IFR/LIFR vis due to fog.
535 AM CST Mon Dec 21 2020 Latest water vapor imagery is showing a trough over the western Great Lakes that the HREF shows diving into the Ohio Valley later today. Mid and high clouds associated with this trough are staying over Illinois and will push east this morning. There is a cold front over Iowa and Nebraska that will move southeast across Missouri and Illinois later today. Dry weather is expected to continue tonight and Tuesday as the upper trough over the western CONUS will move into the Midwest by tomorrow. There will be a notable contrast in highs tomorrow from west to east as a warm front moves north into the region.
Clear skies will allow temperatures to drop to around the freezing mark. For Tuesday a fast moving upper level ridge will allow for a warm up which will be aided by a developing low in the plains. As the low deepens and moves east, the pressure gradient will tighten during the afternoon with wind gusts between 25-35 mph from the south. The models are coming into better agreement on the track of the low though timing issues remain.
615 AM EST Mon Dec 21 2020 Conditions will improve over the next few days as high pressure builds in. A strong cold front will move across later in the week followed by a couple of days of very cold temperatures. High pressure will move offshore as a strong cold front moves into the area late in the period.
Winter has officially begun and strong high pressure remains overhead NorCal. Strong temperature inversion present with valley readings currently in the mid 30s to lower 40s while foothill ridges are in the lower to mid 50s. Ridging and breezy northerly flow quickly return in its wake on Tuesday.
Warm front is now north of our CWA and we will be very mild today and this evening. Strong cold front will arrive overnight and Tuesday morning with several inches of snow in northern mountains, and rain showers changing to snow showers in the south, with an inch or less snow accumulation expected.
1013 AM MST Mon Dec 21 2020 High clouds stream into the northern plains as an upper ridge builds over the western CONUS. At the surface, cold front is nearly through the CWA, and northwesterly winds remain gusty across portions of the western SD plains. As the upper ridge axis shifts over the central states over the next couple of days, dry and mild weather can be expected. Highs Tuesday could reach the 60s before a strong cold front moves in, but temperatures will depend on the timing of the front.
This afternoons high temperatures remain on track to top out in the low 60s under sunny skies, along with mainly light northwest winds. Zonal flow aloft sets up tonight into Tuesday, followed by broad upper ridging moving from west to east over the region throughout the day Tuesday. High temperatures Tuesday will be in the low to mid 60s.
300 PM EST Mon Dec 21 2020 High pressure will prevail through the short term, keeping conditions dry. At this point, will hold off on a Wind Advisory given highest gusts limited primarily to the highest ridgetops.
1121 AM CST Mon Dec 21 2020 Latest water vapor imagery is showing a trough over the western Great Lakes that the HREF shows diving into the Ohio Valley later today. Mid and high clouds associated with this trough are staying over Illinois and will push east this morning. There is a cold front over Iowa and Nebraska that will move southeast across Missouri and Illinois later today. Dry weather is expected to continue tonight and Tuesday as the upper trough over the western CONUS will move into the Midwest by tomorrow. There will be a notable contrast in highs tomorrow from west to east as a warm front moves north into the region.