Aikyam-Lab/Synoptic-Bench huggingface dataset:
315 AM MDT FRI APR 22 2016 CURRENT WATER VAPOR IMAGERY LOOP SHOWED THAT THE MO VALLEY UPPER LOW HAS OPENED AS IT TRACKS EAST ACROSS THE MIDWEST. A UPPER RIDGE AXIS WAS LOCATED FROM THE FOUR CORNERS TO EASTERN MT. THE NEXT EASTERN PACIFIC UPPER LOW/TROUGH WAS APPROACHING THE WEST COAST. REGIONAL SURFACE ANALYSIS INDICATED A RIDGE FROM THE SOUTHERN GREAT PLAINS NORTHWEST ACROSS WY. SKIES UNDER THE RIDGE WERE CLEAR WITH LIGHT SOUTHERLY WINDS. THE SHORT TERM MODEL CONSENSUS PROGS THE UPPER RIDGE TO SHIFT EAST INTO THE GREAT PLAINS DURING THE NEXT 24 HOURS. THE PACIFIC UPPER LOW PROGRESSES EAST THROUGH THE INTERMOUNTAIN WEST. WITH THE LOW SITUATED OVER CENTRAL WY SATURDAY NIGHT.
322 AM EDT FRI APR 22 2016 UPPER LEVEL LOW PRESSURE OVER THE OHIO VALLEY WILL OPEN INTO A POSITIVE TILT UPPER TROUGH DURING THE DAY WITH THE TROUGH AXIS CLEARING THE FORECAST AREA DURING THE AFTERNOON. ONCE THIS TROUGH PROGRESSES INTO THE OHIO VALLEY DURING THE LATE MORNING HOURS. SHOWER CHANCES WILL BECOME SPOTTY WITH ONLY A FEW ISOLATED SHOWERS DOTTING THE SOUTHERN PORTION OF SOUTHEAST LOWER MICHIGAN INTO EARLY AFTERNOON BEFORE MAIN UPPER TROUGH AXIS SWEEPS DEEPER MOISTURE EAST. HIGH PRESSURE WILL BUILD INTO THE CENTRAL GREAT LAKES LATER TODAY AND PERSIST INTO SATURDAY NIGHT. SOUTHERLY FLOW OVER THE MARINE AREAS EARLY THIS MORNING WILL SHIFT TO NORTHERLY FLOW AS THE COLD FRONT PUSHES SOUTH ACROSS THE REGION TODAY. WINDS THEN DIMINISH LATER TONIGHT AS HIGH PRESSURE TAKES OVER.
COOLER THIS WEEKEND WITH INCREASING SHOWER ACTIVITY.
332 AM CST Wed Nov 23 2016 A cold front that extended southeast of a Sulphur Springs to Austin line at 3 am will exit the forecast area before daybreak.
1221 AM EST Wed Nov 23 2016 High pressure tonight. A warm front Wednesday. A weak cold front Thursday.
103 AM EST Wed Nov 23 2016 High pressure will build in from the west through Wednesday. A cold front with limited moisture will move through the area on Thanksgiving day.
Water vapor imagery also shows the upper low lifting into southeast Minnesota and southwest Wisconsin.
1236 AM EST Wed Nov 23 2016 An area of low pressure will track towards the southern Great Lakes for the middle of the week.
Low clouds have formed along the trough and will continue to develop and move inland today as moisture convergence persists. spreading up the coast this afternoon and evening as the trough shifts inland. Temperatures will continue to moderate with highs today in the low/mid 70s.
A 75 KT jet streak exists on the southeast flank of the upper-level cyclone, with a slightly weaker jet streak located to its south of east TX. Southwesterly winds have set up a well defined plume of mid/upper- level moisture approaching the Mid-South, but moisture at the low- levels remains scant. Rain is a good bet across the entire CWA during this time, with the highest QPF amounts in the western half of the forecast area.
With high cloud cover from the approaching trough/cold front overspreading much of the TN valley, have adjusted sky cover grids to reflect the increase in cloud cover. One thing to note is that the low-levels of the atmosphere continue to exhibit high dewpoint depressions (~30 degrees), and it will take more moisture advection and/or substantial rainfall tomorrow to yield much in the way of precipitation. The rest of Thanksgiving will be dry and mild thanks to a building area of high pressure.
The upper trough associated with it should weaken as it moves northeast towards upper ridge now over the Ohio Valley. The higher terrain across central and northcentral Wisconsin is just enough to keep it cold enough for mostly snow today, though sleet and rain is possible at times.
306 AM EST Wed Nov 23 2016 High pressure along the eastern seaboard will slowly depart to the east today and tonight. A weak warm front will lift north through the region late tonight and Thursday as a weakening cold front approaches from the west.
323 AM CST Wed Nov 23 2016 The cold front has moved through the I-30 corridor and will continue to quickly move east through the morning hours. There is some heavy rainfall along the pre-frontal trough, and this will be the main threat for the rest of the morning.
Isolated showers are developing in the southeastern part of our area ahead of an approaching cold front, but looks doubtful that any of these will affect KBBD or KJCT. The cold front is moving quickly south across the Concho Valley and Heartland, and will reach KSJT shortly after 06Z. At KABI and KSJT, southwest to west winds will shift to north with a weak cold frontal passage tonight (05Z at KABI and 07Z- 08Z at KSJT). /issued 255 PM CST Tue Nov 22 2016/ (Tonight and Wednesday) A cold front will push across West Central Texas, during the next 18 hours, and bring cooler temperatures and light winds from the northwest or north.
a dirty arctic ridge producing stratus across the Dakotas and ern MT is forecast to sag into ncntl Neb this morning and then move east this afternoon and tonight as low pressure deepens across the cntl high plains. The forecast leans on the cooler RAP and HRRR models plus bias correction. Low pressure will deepen west of Rapid City and then drop into nwrn Neb by morning. While there's still some uncertainty in the track and intensity of this system, most models are indicating a warmer boundary layer throughout Thursday keeping precipitation in an all liquid form as the system moves eastward throughout the day. The system moves into Iowa by Thursday night as high pressure builds back into western Nebraska.
307 AM CST Wed Nov 23 2016 Northwest winds with a weak high pressure system building in will slowly clear the skies out for today. This weak high pressure will move out of the area tonight as the next short wave approaches.
And could also see widely scattered showers with the passage of the trailing cold front later tonight.
Upper short wave trough moving into the Pacific Northwest this evening. Showers along a cold front, which is near the west coast, will spread into SE Oregon late tonight and SW Idaho on Wednesday. The cold front will herald breezy SW-NW winds of 15-25 mph with higher gusts south of a Burns-Boise-Fairfield line in the afternoon. A weak upper ridge and a drier air mass will slide through the region Wednesday night. S-SE winds (with gusts of 20 to 30 mph) will develop Thursday afternoon ahead of the next Pacific low pressure system across Baker County and the Upper Treasure Valley.
Both low and upper level cloud cover continues to stream into the region in advance of an approaching upper trof and associated surface front. Tonight will see a cold front currently west of the DFW/FTW metroplex bring some late night showers and isolated thunderstorms. Drier air will then spill into the region during the overnight hours with temperatures falling back into the lower 50s Thursday morning.
A sharp cold front will be passing through KPVW and KCDS before 00 UTC and should reach KLBB shortly before 01 UTC. /issued 248 PM CST Tue Nov 22 2016/ Upper level low across Kansas this afternoon will decay over time with a trailing trough remaining to our east through Wednesday. To our west, a flatting ridge will edge closer to the central CONUS. After a breezy afternoon, surface cold front will push through the CWFA. A window of perhaps 2-3 hours of breezy (15-20 mph) winds should follow the front becoming light on Wednesday as high pressure settles in.
Areas of fog will continue to develop east of a Hebbronville to tilden line through daybreak as winds relax ahead of an approaching cold frontal boundary. Slightly cooler and drier air will settle into the region in the wake of the front with temperatures about 5-7 degrees cooler than yesterday. Partial clearing tonight will allow temps to dip to near 50 degrees near VCT, however returning clouds across the southern areas will hold temps there to the lower 60s. The next trough will advance into the central plains on Thursday drawing clouds and moisture northward across the region and a return of onshore winds.
311 AM EST Wed Nov 23 2016 A ridge of high pressure will slide east across Pennsylvania today. Weakening low pressure lifting out of the Mississippi bringing moderating temperatures and a chance of rain showers tonight and Thursday.
A cold front is pushing down across our area early this morning. The cold front is expected to exit the far southeast area by 9 AM this Wednesday morning followed by mostly sunny to clear skies and high temperatures ranging from the upper 60s to lower 70s.
We remain in control of the high for many with temperatures in the upper 20s to lower 30s. Ahead of this lower pressure and primary trough there is a weak warm front this will try to bring moisture back into the region. That said, based on the model soundings we remain dry in the lowest layers through much of the day. Also models have struggled to resolve the low stratus deck and for this had to do more manual adjustments. The other issue will be just how warm do we get considering the low stratus on Thu and therefore did trend slightly lower for high temps Thu. This as cold front and subsequent rain shower activity progress into the region.
350 AM EST Wed Nov 23 2016 Low pressure will lift into the region bringing periods of rain today into tonight. Precipitation will likely begin as a mix of rain, freezing rain, and snow this morning across northeast Indiana, Michigan, and far northwest Ohio. Plume of deeper moisture within warm conveyor belt downstream of broad mid-upper level trough will bring periods of mainly light rain to the area today-this evening. Could see some very light snow accums on mainly grassy/elevated surfaces, with some light freezing rain possible mid morning given expected near freezing wet bulb profile under a warming/moistening layer near 800-750 mb. Weakening low level reflection and occluded front will lift east- northeast into the lower Great Lakes tonight.
Per sfc obs the dry cold front has moved south thru the CWA down to the Rio Grande. Flat ridging will bring dry weather today with temps just a little above normal. Upper trof now moving into the Pacific NW will progress across the Rockies into the Plains on Thanksgiving.
359 AM EST Wed Nov 23 2016 High pressure will shift offshore today. A weak cold front will cross the area Thanksgiving.
The surface center this hour was located in northwest Missouri with a slow trailing cold front across eastern Oklahoma.
432 AM EST Wed Nov 23 2016 A low pressure system will move through the area today into Thursday.
At the surface, low pressure is centered over south central Kansas, heading east. Gusty northwest winds should slowly taper off this evening as the pressure gradients relax behind the departing low pressure. Due to this high, clear skies and no precipitation should be expected. North winds should go light and variable tomorrow morning as the high passes. Behind the high, south winds will develop as a weak lee trough develops along the front range. A compact short wave trough will sweep across the area Wednesday night into Thanksgiving morning. strong winds expected to develop on Thursday morning as cold front sweeps over the area. Cooler more humid air will work into the area behind the front.
The models were differing somewhat, with the global models slower than the higher resolution models. The low-level capping inversion may keep thunder out of the metro Houston airport sites as well. A cold front lagged a bit behind extending from about KSPS to KHOB. As the cold front over North Texas nears the region, additional showers and thunderstorms will develop.
Cyclone centered over eastern Kansas this evening with rain area out across Arkansas, southeast Missouri and far western Tennessee trying to work east into our area but air mass is so dry about all we are seeing is patchy virga falling out of 12 thousand foot base of altocumulus clouds. Cyclone out in central plains will move northeast next 24 hours. Rain area will gradually work this way but upper ridge is retarding its progress so looks like a slow go.
This low will lead to showers and even isolated thunderstorms across the CWA. Tomorrow looks to be a gloomy day with light rain, low clouds, and winds in the low teens. The low will move south of the CWA through the overnight period and into the early afternoon. As this low moves through the area, rounds of showers will be possible. Temps forecast to fall only into the lower 30s, held up by cloud cover. Thinking most areas either receive no accumulation or possibly a dusting on grassy surfaces with lows near freezing.
1233 AM EST Wed Nov 23 2016 High pressure will maintain dry weather tonight before rain chances return with crossing low pressure Wednesday through Thanksgiving. This should gradually erode as the center of high pressure moves over Western PA tonight. Model soundings show low level dry air that will be tough to overcome as the warm front lifts north. The dampening upper-level trough will then push through Wednesday night into early Thursday spreading rain across the forecast area. Models have continued the warmer trend Thursday morning, which at the moment, will keep all precipitation in the form of rain. With the trough and weak front pushing east of the forecast area later on Thanksgiving, mid and upper-level moisture will evacuate the area.
316 AM CST Wed Nov 23 2016 The region is currently under a broad upper level trough with light surface winds. This stratus deck may erode some from the southwest later tonight as winds become southerly ahead of a low pressure system. With temperatures near freezing, believe snowfall amounts will range between a dusting to one inch for most areas. Slightly higher amounts will be possible in the eastern portion of the CWA where better low level moisture and cooler temps are possible.
At the surface, trof of low pressure is located across central SD, with Canadian high pressure moving in from the northwest. But with prolonged cloud cover east of the Black Hills, most locations across the SD plains will not see temperatures rise much further than the low 30s.
Moisture feed ahead of this low was producing mainly scattered rain showers along/south of I- 90. cloudy through the remainder of the night with lows falling into the lower 30s. Thursday night could get a little interesting as models bring a fairly vigorous mid-level trough into the region.
211 AM EST Wed Nov 23 2016 A warm front today. A weak cold front Thursday.
After that time, the focus of lift will remain along the eastern limb of the upper trough as it moves through the WFO PAH forecast area.
1013 PM CST Tue Nov 22 2016 Multiple convective segments have set up ahead of cold front, which is still west of I-35. but should start to see MVFR cigs develop after 03Z over E TX as sct convection ongoing now becomes more numerous well ahead of a weak pacific front and upper trough that will advance E across Wcntrl/N TX.
The low ceilings look to shift eastward slower than previous model runs, with very eastern Kansas keeping cloud cover until late tonight. Due to this, high temperatures from today have been lowered slightly, with central and east central Kansas in the lower 50s and very northeast Kansas in the mid 40s.
The easterly surface wind on the south side of the high pressure area moving into VA/NC area will slowly draw in moisture from the Atlantic. Dewpoints will be on the increase with values in the mid to upper 40s across the FL panhandle and SW GA and the lower to mid 40s west of this area. Looking upstream, a surface cold front will move through the ARKLATEX region overnight which our impacts from this will be an increase in high level clouds towards dawn. A weak upper trough will move into the Southeastern states late Wednesday into Thursday and push a weak cold into the area. However, with minimal deep moisture and the upper ridge holding strong across South Florida, any precip associated with the front is expected to dissipate before reaching the local forecast area.
Winds will be shifting towards the south during the day ahead of an approaching low pressure system.
There are multiple ongoing linear clusters of convection to our west as the cold front overtakes a dryline across TX and interacts with a tongue of elevated instability.
The base of this trough has a vortmax now over the Red River and it will rotate northeastward and cross the Wabash River this afternoon.
Moderate risk of Rip Currents today, Thanksgiving Day, and High pressure will continue to remain over South Florida today into Thanksgiving day keeping the weather mostly dry along with easterly wind flow.
Associated with this mornings trough is a cold front that is currently sweeping east through Missouri; as of 3 AM, located around I-35.
The upper low has scooted northeast into south central Nebraska this afternoon and have seen a decreasing trend of showers over the mountains and plains. Progressive ridge aloft will move Colorado later tonight and Wednesday with an increasing Westerly to Southwest flow aloft. Warmer temperatures expected across lower elevations with some increase in high level moisture during the afternoon. Trough swings east of the mtns in the morning with a cold and gusty nwly winds spreading out acrs the plains.
The cold front will move into the northern portion of South Texas 15-16Z and moves through the southern Coastal Bend by 21Z Wednesday. The mid level short wave trough will move across Oklahoma and north Texas tonight and be over the Ozarks down through the Arklatex region by Wednesday morning.
low amplitude upper ridge builds across the cntrl plains with dry conditions continuing thru Thursday morning.
1130 PM CST Tue Nov 22 2016 We could see some re-development of showers/isolated storms across southeast Kansas into the evening hours with-in low level moist axis, as upper trough axis still west of the area provides lift over the area tonight. A cold front will race southeast across the area tonight as the upper level system moves to the northeast. Daytime highs will be cooler on Wednesday but still above normal with even warmer temperatures expected on Thursday as short-fused upper level ridging builds across the central plains.
An associated cold front is pushing south and has moved through most of the Texas panhandle and portions eastern New Mexico. West of that, a ridge of high pressure is over the interior West and upstream of that is a low pressure system moving into the west coast. The high pressure ridge over us will be short lived moving to the Rockies on Wednesday as the upstream trough moves inland. However, northerly breeziness develops Wednesday night over the Lower Colorado River Valley and expands to much of the rest of the forecast area during the day Thursday (favoring northeast directions over south- central Arizona).
324 AM EST Wed Nov 23 2016 Overall moisture increases today and tonight as a cold front over the mid U. moves to the Lower-Mid MS valley late day. An upper level trough associated moves across the area tonight with a weak short wave on Thursday.
The axis of elongated high pressure will shift into the western Atlantic as a weakening low moves toward the Great Lakes. While an inverted trough will help aid in low-level convergence, especially along the coast, suspect little more than increased cloud cover, isolated sprinkles, and perhaps a few light rain showers to materialize today (though this certainly will be a marked change compared to the crystal clear skies of the past few days). Light and variable flow over land should take on a distinct onshore component by late morning, especially along the coast, as the inverted trough dampens out into the afternoon. Southeast flow will combine with the inverted trough along the coast to keep sky cover elevated.
/Issued 336 PM CST Tue Nov 22 2016/ Clouds are making their way south across portions of the Panhandles as a 700 hPa trough axis continues to move to the east. Light northwesterly winds during the overnight will allow temperatures to drop to below freezing across most of the Panhandles with mid 30s in the SE TX Panhandle.
due to an increase in forcing for large-scale ascent downstream of vort max transversing the base of the longwave trough. Lows are forecast to range from the mid 40s across portions of south-central Illinois to the low 50s for central Missouri. mainly due to the warmer than normal start to the day.
Temperatures were kept cooler over cloud areas. but will reach near 50 or the lower 50s where sunshine prevails. Wouldn/t be surprised if the far northeast corner of the forecast is actually cooler than current forecast if no clearing is realized during the day.
1243 AM EST Wed Nov 23 2016 Dry high pressure will maintain fair weather through Wednesday.
just ahead of the the upper trough and attendant pacific cold front that has shifted E into Cntrl OK/TX. /issued 1013 PM CST Tue Nov 22 2016/ Multiple convective segments have set up ahead of cold front, which is still west of I-35.
325 AM EST Wed Nov 23 2016 High pressure builds over the Tri-State today.
1102 PM MST Tue Nov 22 2016 The upper low over Kansas with its associated trough will gradually move east and lift out through the late afternoon and evening hours with the midlevels gradually drying out through the course of the next several hours. The Wednesday night system is fairly progressive, but there is the potential that several inches of snow could be seen on the western facing slopes given increased midlevel winds and their orientation, so this is something we might want to keep an eye on for those with interests in the high country. There could be a short period of rather gusty winds across far se Wy Thursday morning in a sort of Bora event behind a cold front otherwise Thanksgiving looking seasonably cool and breezy overall.
222 AM EST Wed Nov 23 2016 High pressure along the eastern seaboard will move off the coast.
/Issued 944 PM CST Tue Nov 22 2016/ A narrow line of convection has developed along the cold front this evening.
1222 AM CST Wed Nov 23 2016 Added slight chance of drizzle/freezing drizzle to south central ND in addition to the north central. 00z soundings do suggest drizzle with a saturated surface layer in the low stratus and dry above the stratus layer. Added slight chance for freezing drizzle north central tonight based on Minot radar and the Bufkit soundings suggesting no ice crystal seeding. Radars show some light returns at on Minot in VCP-31 which could show up as light freezing drizzle if it reaches the ground since there are no seeder ice crystals. Southerly flow along the trough has maintained cloudy conditions for a good part of the day over the James River Valley.
231 AM EST Wed Nov 23 2016 A warm front today. A weak cold front Thursday.
This afternoon an upper level trough was lifting northeast across western and central KS. On the west side of the upper trough there may be some wrap around moisture which will keep the chances for showers across northeast and east central KS during the early morning hours of Wednesday. The low stratus cloud cover will erode from west to east across the CWA through the afternoon hours. The western counties will be warmer due to insolation and highs should reach the lower 50s. The eastern half of the CWA will remain mostly cloudy through most of the afternoon and highs will be cooler with mid to upper 40s. Dry and seasonal conditions are expected for Thanksgiving Day as a subtle weak mid-level ridge quickly passes over the area ahead of a mid-level trough advancing into the Northern Plains through the day.
318 AM EST Wed Nov 23 2016 Massive upper level low centered just northeast of New Brunswick will be slow to exit into the North Atlantic, with broad Upper level Trough Axis swinging through the Central Great Lakes Tonight. Although not included in the actual wx/zones, sleet/ice pellets are possible with partial melting and refreezing of the hydrometeors. Warm layer (1-3 C) at 925 mb forecasted to lift at least to the I-69 corridor, along with the higher surface dew pts, changing any lingering snow over to rain/drizzle overnight, as mid level dry slot arrives toward morning.