Aikyam-Lab/Synoptic-Bench huggingface dataset:
/issued 926 AM EST Sun Nov 27 2016/ Latest water vapor imagery and upper air analysis shows a northwest flow aloft over the state as the area resides between troughing to our east and a building ridge over the central part of the country. At the surface, high pressure is over the southeast, with a northeast wind flow across forecast area. For the rest of today, the upper ridge will continue to build eastward in response to a deepening trough to its west. With stacked ridging in place, no rain is in the forecast and the rest of the day will feature mostly sunny skies with highs topping out a couple of degrees above normal. High pressure over the southeast will shift eastward over the next couple of days as a cold front approaches the southeast.
Behind the front, the flow continues to shift northeasterly, ushering in a slightly cooler and drier airmass as high pressure builds from the north. High pressure will dominate the weather pattern for the early week period, with partly cloudy skies and generally dry weather outside of a few sprinkles/light showers along the east coast.
The weak mid/upper ridge across Wisconsin will move off to the east early tonight as a strong trough over the northern Rockies pushes into the Northern and Central Plains. A strong 170 knot upper jet rounds the base of the trough and pushes across the southern Lake Michigan region Monday. The pressure gradient is really going to tighten up over southern WI as low pressure occludes over the Dakotas tonight.
Surface analysis still has the low pressure system near the Nebraska/Kansas/Colorado borders. Temperatures will warm back into the lower 50s during the afternoon. Have kept the forecast dry through the period, but each of the waves brings an increase in cloud cover and a weak cold front.
1259 PM EST Sun Nov 27 2016 Fair weather will accompany the arrival of high pressure later today and last through Monday.
1233 PM EST Sun Nov 27 2016 Aviation A ridge of high pressure pushes east of Michigan today. A warm front will lift northward through the region later tonight into Monday.
223 PM MST Sun Nov 27 2016 Water vapor shows upper low beginning to take shape over cntrl NE, with sfc analysis showing deepening low near the same area.
1212 PM EST Sun Nov 27 2016 High pressure will move off to the east on Monday. Periods of rain with several waves of low pressure Monday night and mid week. A high pressure system will move off to the east, allowing for southerly winds to increase later tonight into Monday. Due to the winds, will go on the warmer side of MOS lows for the western counties. Lots of dry air in the lower levels, so precipitation trying to come into the area from the west will have to break through this layer. One last day on Monday of dry and warm weather under high pressure before a series of amplified upper troughs and frontal systems bring a very wet and quite mild pattern, with well above normal temperatures.
1017 AM EDT WED MAY 25 2016 A summer like weather pattern will take hold, with warmer air, and gradually increasing humidity, over the next several days.
Upper flow will be southwest today/tonight ahead of an upper low that will move into the 4-corners areas Thursday. The upper low will move into eastern Colorado Thursday night.
1050 AM MDT WED MAY 25 2016 Unsettled weather continues to our west as two areas of low pressure, one over northern Montana and another over south California, are connected by a trough. By Thursday morning, the closed low over California will have moved to the Four Corners region as models start depicting some light precip over higher terrain. The precip and clouds will keep high temperatures 5 to 10 degrees cooler than normal.
1200 PM EDT WED MAY 25 2016 High pressure will remain centered off the southeast coast today through Thursday.
The elongated upper level trough over the Great Basin will shift slowly across the state through Thursday. Unsettled conditions associated with this trough will persist through the end of the week.
/issued 436 AM CDT WED MAY 25 2016/ Latest UA analysis and WV imagery shows weak upper ridging over the nw gulf coast, with an upstream low/trough digging spinning toward srn CA. High level clouds are noted streaming over the top of the ridge and into the forecast area. The sly winds are also producing rather muggy conditions with temperatures in the middle to upper 70s which is about 5 degrees warmer than this time yesterday morning. Weak upper ridging should still be strong enough today to limit convection although a isltd shower or storm will be possible mainly over wrn portions of the area. The upper ridge will gradually break down Thursday as the low over srn CA moves east.
/Issued 330 AM EDT WED MAY 25 2016/ High pressure will move offshore today.
Water vapor loop indicated a trough from eastern WY into eastern CO and was moving to the northeast about 40 knots. Short wave ridging east of trough was returning moisture northward. Precip basically falls under the 700 hpa theta-e ridge. Precipitable water increases again for Fri/Fri night as upper low off the southern CA coast moves out into the plains of NE. Concurrently an upper trough over western MT will move into northern ND/southern MAN Fri/Fri night.
Some adjustments to the low level cloud deck were made as well. Upper flow will be southwest today/tonight ahead of an upper low that will move into the 4-corners areas Thursday. The upper low will move into eastern Colorado Thursday night.
945 AM EDT WED MAY 25 2016 High pressure building off the Carolina coast will be the dominant WX feature for the FL peninsula today as it suppresses higher moisture over the FL Straits. RAP40 analysis shows an H100-H70 anticyclone centered just off the GA/SC coast that will maintain a deep erly flow. Enhanced drying and subsidence overhead generated by the ridge will preclude any precip chances this aftn. High pressure centered just off the Carolina coast will maintain the gentle to moderate Erly breeze that has prevailed the past few days. Shras not expected as the high pressure keeps deep moisture suppressed over the FL Straits.
Temperatures tonight will remain seasonably warm, with overnight lows in the low to mid 60s. We will remain on the western edge of the mid level ridge located over the east coast through the end of the week.
629 AM CDT WED MAY 25 2016 An elongated low pressure region through the northern and central Plains will be the primary weather-making feature today as it moves slowly northeastward in southwesterly flow. Warm temperatures will continue today with highs again in the low to mid 80s. Southerly winds 10 to 15 mph will result from a gradient between the low pressure over the Plains and high pressure over the east coast. Upper flow currently coming out of the southwest, rounding the southern edge of a closed low off the California coast.
An area of high pressure remains centered just off the coast of the Carolinas this morning. A slightly greater threat for a few showers also will exist as the low-level jet strengthens after dark.
516 AM MDT WED MAY 25 2016 Upper flow will be southwest today/tonight ahead of an upper low that will move into the 4-corners areas Thursday. The upper low will move into eastern Colorado Thursday night.
905 AM PDT WED MAY 25 2016 Showers and isolated thunderstorms again today, mainly over the higher elevations. Dry and warmer by the weekend. The large upper trough that has kept the cool and unsettled weather pattern going across the region over the past several days remains overhead NorCal, but most of the energy has consolidated into a closed low that is now just off the SoCal coast near Vandenberg. This low will move east into the lower Colorado River Valley today before lifting out into the central Plains by the end of the week, gradually replaced over NorCal by ridging from the eastern Pacific.
The elongated upper level trough over the Great Basin will shift slowly across the state through Thursday. Unsettled conditions associated with this trough will persist through the end of the week. Two closed lows to note in morning water vapor and H5 analysis. Both combine to maintain a broad long wave trough across the western conus. The south is expected to remain largely dry through much of the day beneath subtle low amplitude ridging downstream of the SoCal low. Additionally, the current deformation will become more pronounced along the northwestern periphery of the low tomorrow, with light northerly flow spreading into northern Utah in wake (as the upper trough axis shifts east).
Highs are still on target for the low/mid 80s. Aside from a few radar returns that suggest isolated light rain showers over south central Kentucky, we are almost entirely precip-free as new convection advertised by most of the models has failed to materialize over the lower Ohio and Wabash Valleys, and an earlier MCS has almost completely fizzled over western Tennessee. Precip chances will remain limited to chance, and temps will continue to run several degrees above normal by day, and trend warmer each night.
703 AM CDT WED MAY 25 2016 Significant S/W trof axis continues to lift slowly northeastward across the Plains States early this morning, with widespread thunderstorms extending from South Dakota to eastern Oklahoma. As a result, we expect it to be pretty hard for the surface warm front to make too much progress to the north, which should act to limit any severe T-Storm potential in the DLH CWA, although a few stronger storms with roots above the shallow stable layer are likely, with the primary threat of large hail.
702 AM EDT WED MAY 25 2016 High pressure will slide across the Mid Atlantic region then off the coast today through tonight.
1152 AM EDT WED MAY 25 2016 High pressure will remain centered off the southeast coast today through Thursday.
The large upper level trough continues to slowly move east across the area today. As is usually the case, the chances will be best on the higher terrain. Elongated upper level trough will continue to impact the region today with scattered to numerous light showers developing mainly over the higher terrain. Showers will taper off overnight and Thursday as the trough transitions east and the flow becomes northwesterly.
907 AM EDT WED MAY 25 2016 High pressure over the area will weaken toward evening as a weak cold front approaches from the north.
937 AM EDT WED MAY 25 2016 Sunshine and warmer weather will return today ahead of a cold front. A ridge of high pressure will build over the area tonight. then hold over the region on Thursday as a warm front approaches from the west.
10 AM temperatures are running about 2 degrees warmer than same time yesterday. The mid to upper level ridge overhead will keep the these storms north of the area. Several short waves in the westerlies bump the ridge and slowly decrease heights.
537 AM MDT WED MAY 25 2016 12Z TAF CYCLE Southwest flow aloft continues today ahead of an upper level closed low moving ashore across southern California. A Pacific low pressure system will approach from the west overnight and move over northern New Mexico Thursday. bringing cooler temperatures.
Upper level low off the California coast will move over southern California today. The low will continue to move eastward and be over Arizona tonight. A weak ridge will move across the state today. Temperatures will be warmer today with highs in the 70s across northeast Colorado.
538 AM MDT WED MAY 25 2016 Predawn water vapor loop depicted a positively-tilted upper trough from south central Canada across the northern Rockies to a low off the central California coast. A quasi-stationary surface front extended from eastern South Dakota into western Nebraska then south through the high plains.
924 AM EDT WED MAY 25 2016 High pressure will remain in control just off the SE U. coast with ridge back across NE FL/SE GA through Thursday with warm and dry conditions. Easterly steering flow will keep the beaches slightly cooler in the lower to middle 80s while inland areas will reach into the upper 80s to near 90 which is still close to climo values for late May.
Regardless, we are moist and unstable and expect the the lower winds to back slightly.
Also spread pops this morning further west into Phillips county as a few showers are rotating in thanks to the upper low over southwest Saskatchewan. The upper low drifts into North Dakota Thursday Night which will diminish the chance of showers to slight chance overnight.
and for the latest MOS guidance which is several degrees cooler in some spots than the current forecast.
1044 AM EDT WED MAY 25 2016 A ridge of high pressure will build over the northeastern U. Cooler and showery weather may arrive for Memorial Day. If they do develop, the cu will be over the ridges and very sparse in coverage.
706 AM EDT WED MAY 25 2016 A ridge of high pressure will build over the northeastern U. Slightly cooler weather may arrive for Memorial Day. If they do, it will be over the ridges and very sparse coverage.
1255 PM EDT WED MAY 25 2016 A ridge of high pressure will build over the northeastern U. Cooler and showery weather may arrive for Memorial Day. If they do develop, the cu will be over the ridges and very sparse in coverage.
Further west, area of PV in central MT along with low convective temps in the lower 60s should allow for an earlier start to today's diurnal showers w/ isold TS. We will remain under the influence of an upper low over northern Montana and its related cyclonic flow today and Thursday. Convection the next two days will be non-severe, but given the fairly low freezing levels we cannot rule out some brief pea size hail in any stronger cells, but these should be far and few between.
An upper level trough will continue to weaken and shift east today. Elsewhere, a few showers may occur over mountain ridges.
A slightly greater threat for a few showers also will exist as the low-level jet strengthens after dark.
731 AM EDT WED MAY 25 2016 High pressure over the area will weaken toward evening as a weak cold front approaches from the north.
938 AM EDT WED MAY 25 2016 High pressure will maintain dry and warm weather most of today. CL Ridging should maintain dry weather most of today.
East Arkansas may struggle to climb into the lower 80s due to cloud cover and rainfall.
Low pressure will move across the deserts today continuing the trend of well below normal temperatures and bringing a better chance of showers and isolated thunderstorms to California and portions of central and southern Nevada. Upper low moving into southern California this morning with board scale ascent occurring over the Mojave Desert and southern Great Basin. Upper low will track east across the lower Colorado River valley into western Arizona tonight. Residual moisture and instability will lead to a chance of showers and thunderstorms over the higher terrain Thursday afternoon.
204 PM EDT Sun Apr 2 2017 Rain will develop Monday and continue through Monday night as low pressure tracks through the region.
An approaching cold front will lead to windy conditions Monday afternoon and evening.
High pressure centered just off of the mid Atlc coast will continue to drift slowly seaward through the day. A cold front over the Mississippi Valley early in the period will move towards the FL Panhandle by early evening while weakening.
These subtle features will push cooler air over the Northern Rockies, so temperatures appear to be 5 to 10 degrees below normal for this time of year.
Currently a weak cold front is pushing across the area. they are just enough to take advantage of steeper lapse rates with the upper level cold front. most paint a cooler day with periods of snow possible for Monday. Tried to keep accumulations generally an inch or less in the lower elevations. Temperatures will be cooler than normal for tonight and Monday.
Cooler air will filter into the area behind this second wave on breezy north winds Monday afternoon.
Keeping pops in areawide this eve for any possible convection with cold front just to the west. Thereafter, a cooler and drier airmass in place for remainder of the week, with rainfree conditions expected thru the upcoming weekend as well. LCH 12z sounding does show a blend of stg instability and very high low lvl shear, which has translated nwd with advancing warm front.
103 PM EDT Sun Apr 2 2017 High pressure will provide fair weather today with highs in the lower 60s. Another soaking rain is expected Monday through Monday night as low pressure tracks through the region.
Since it is marginal and any small loss of moisture in the low to mid levels would eliminate this threat will not mention.
the upper low is expected to lift northeast and become nearly vertically stacked across Central and Eastern Oklahoma. Additional showers with possible embedded thunderstorms will are forecast to spread back into the region late this evening and overnight as the low moves overhead of Eastern Oklahoma. the upper low is progged to lift into Missouri with a surface boundary moving eastward through the CWA. Will leave an isolated potential for a few lightning strikes Monday morning before the low gets northeast of the region. These conditions will allow for cooler temperatures Monday night as a secondary cold front drops southeast into the region.
Although bulk of instability is elevated with SBCAPEs during the day really struggling to reach 1000 j/kg, northward progression of a warm frontal boundary may serve as a focusing mechanism for any potential severe weather.
1227 PM CDT Sun Apr 2 2017 The next round of rain is ongoing across the area as a large mid to upper level system moves into the High Plains. Areas further north have a bit of dry air still located in the lower levels, which is really eating into potential rainfall amounts further north than the HWY 50 corridor. This will bring with it much better mid/upper level ascent as the PV anomaly becomes much more pronounced with the main trough.
258 PM PDT Sun Apr 2 2017 A short wave trough moving down the east side of the Sierra Nevada tonight and Monday may bring a few showers near the Sierra Crest tonight along with cooler temperatures and breezy to windy conditions across the region Monday.
The trough could play with the winds some, but will have little impact otherwise.
209 PM CDT Sun Apr 2 2017 An upper low over west Texas this afternoon will continue eastward tonight taking precipitation and cloud cover with it.
A dry cold front will move through our region tomorrow, resulting in cooler weather along with breezy conditions.
351 PM CDT Sun Apr 2 2017 An upper level low over West Texas north of Big Springs will move northeast across North Texas this evening and into southeastern Oklahoma overnight. As of 3 PM, a cold front had nearly exited the forecast area extending southeast of a Paris to south of Palestine to Cameron line. Showers and some thunderstorms will accompany the upper level low as it moves across North Texas tonight. The rain chances will come to an end overnight from southwest to northeast as the upper low exits. It will be cooler tonight with lows in the 40s to mid 50s. Lingering clouds across the northeastern third of the forecast area will move off to the northeast with upper low Monday morning, leaving mostly sunny skies areawide for the afternoon.
541 PM EDT Sun Apr 2 2017 High pressure will maintain fair weather over central Pennsylvania through tonight.
The strong dynamic forcing of the low is currently aiding stratiform rain showers across west Texas and the Edwards Plateau. All activity is expected to diminish late evening as the low shifts east. Clear skies are expected throughout the day Monday as highs reach into the low 80s to even low 90s.
Still looks like a rapid warm up today, with afternoon highs surging into the mid to upper 70s west of the Cumberland Plateau and into the lower and middle 70s along the Plateau itself.
As low pressure tracks from northeast Oklahoma early Monday morning to west-central Illinois by evening, strengthening upper dynamics in association with deep-layer moisture will produce widespread showers and thunderstorms throughout the day Monday.
the upper low's slow movement into the Big Bend region this afternoon really placed the best diffulence west of us. Dry slotting behind the exiting upper low into the Midwestern CONUS tomorrow morning will clear skies and allow temperatures to fall into the upper 50s to near 60 F.
The upper low is still forecast to move over the region Monday into Monday evening. The stratiform rain area may linger over the southeast into the morning hours, but there should be a decent break before the convection associated with the upper low develops.
150 PM EDT Sun Apr 2 2017 Low pressure over the western Atlantic this morning continues to pull away while high pressure builds east from the Ohio Valley.
210 PM CDT Sun Apr 2 2017 The upper low continues to move slowly eastward across north Texas this afternoon. Most models indicated light amounts of rain later today over central Oklahoma while areas to the south and east will receive bit more when the low tracks into south central then eastern Oklahoma early Monday. Isolated thunder may occur near the center of the low through its track overnight. The low clouds and fog will increase again tonight and clearing is expected to start from western Oklahoma Monday morning.
As the upper low slides across West Central Texas this evening, some thunderstorms may develop of the backside of this low. For tomorrow, lots of sunshine will help overcome the cooler air moving into West Central texas from the west.
broad upper level divergence will increase northward into the Missouri River Valley region as the upper level jet rounds the trough and h5 low pressure system over TX tracks north and eastward into eastern Kansas and Missouri. a cold front accompanied by mid tropospheric support moves into the Missouri River Valley.
column slightly cooler than today but temperatures will continue above average.
252 PM EDT Sun Apr 2 2017 Low pressure over the western Atlantic this morning continues to pull away while high pressure builds east from the Ohio Valley.
Rest of the forecast area will see some cooler breezy conditions today but dry.
155 PM EDT Sun Apr 2 2017 High pressure will maintain fair weather over central Pennsylvania through tonight.
The low clouds look to be stubborn again for much of the day as been the case all week, however some breaks should occur later this afternoon.
Mon afternoon a new upper level trof will move into srn UT and nrn AZ. In the afternoon hours pcpn will also spread across the high valley and the eastern mtns. The highest CAPE values are forecast to be over southern portions of the forecast area in the afternoon, but will put isold thunder in the afternoon forecast for all of the forecast area.
Expect to see patches of light rain and snow in the higher elevations this afternoon along the Sierra Madre, Snowy and Laramie Ranges spreading east onto the plains late afternoon into the overnight period. A progressive upper level trough with a number of embedded vort max features will move across the western CONUS on Monday. A Pacific cold front will move south through the forecast area on Monday, with north- northeast winds up through H7 expected in the wake of the front.
A cold front will weaken and stall across southern Utah tonight. High pressure will return to the region for midweek.
616 PM EDT Sun Apr 2 2017 Building high pressure should result in dry weather today. A series of crossing low pressure areas will keep periodic rain chances in the forecast for the upcoming work week. High pressure centered over the area will slide eastward this evening. This will mean return flow around the back side of the high and ahead of the next system to affect the area should keep temperatures above the levels we dropped to last night. Fries Temperatures near 10 degrees above normal are expected Monday as this continues as WAA continues with rain chances increasing mid-afternoon through the night as low pressure tracks towards the Great Lakes.
231 PM EDT Sun Apr 2 2017 High pressure slides east tonight.
132 PM EDT Sun Apr 2 2017 High pressure builds in through Sunday.
Latest surface analysis places a 1004 mb low pressure center near the ArkLaTex with a warm front extending southeastward across south central Mississippi.