Aikyam-Lab/Synoptic-Bench huggingface dataset:
THIS IS IN RESPONSE TO INCREASED SUBSIDENCE ALOFT AS A RIDGE OF HIGH PRESSURE MOVES EAST. THROUGH THE REST OF THE MORNING THE THE BEST CHANCES FOR FOG WILL BE IN ANY LOCATIONS THAT CAN LOSE THE LOW LEVEL STRATUS/CLOUDS. THE RIDGE OF HIGH PRESSURE SETTLES INTO THE REGION WEDNESDAY AND WITH IT MUCH WARMER TEMPERATURES. AN EVEN WARMER DAY IS ON TAP FOR THURSDAY AS THE RIDGE AXIS WILL BE OVER THE REGION.
1032 AM CDT WED APR 20 2016 TEMPERATURES REALLY WARMED ONCE THE LOW CLOUDS BURNED OFF AND IN OTHER BREAKS BETWEEN THICKER CLOUDS.
THIS WILL ACT TO BUILD RIDGE OVER THE AREA LOCALLY.
1231 PM EDT WED APR 20 2016 HIGH PRESSURE WILL KEEP THE AREA DRY FOR ONE MORE DAY. LOW PRESSURE WILL TRACK FROM THE MIDWEST ACROSS THE CENTRAL LAKES AND TO ONTARIO CANADA.
DEWPOINTS WERE IN THE LOW/MID 50S. OTHERWISE AN UPPER RIDGE STILL WAS CENTERED ACROSS MUCH OF THE ERN PORTION OF THE US.
THIS IS THE LAST OF THE PRECIP ASSOCIATED WITH THE PERSISTENT UPPER LOW WHICH OPENS AND SHIFTS EAST WITH UPPER RIDGING TAKING OVER AND DRYING US OUT. NORTHWEST FLOW WILL FORCE CANADIAN HIGH PRESSURE ACROSS THE NORTHERN PLAINS AND WESTERN LAKES FOR THURSDAY. WHILE WARMER AIR DEVELOPS ACROSS THE FRONT RANGE.
TROUGH OFF THE NORTHERN CALIFORNIA COAST AND OVER THE NORTHEAST CONUS WITH RIDGES OVER THE WESTERN AND EASTERN CONUS. THE EASTERN CONUS RIDGE IS BREAKING DOWN. UPPER LOW CENTERED OVER THE NEBRASKA PANHANDLE THIS MORNING. MAIN FORCING WILL BE TO THE NORTH AND EAST TODAY WITH SOME SHOWERS MOVING IN ON THE BACKSIDE OF THE UPPER LOW ACROSS SOUTHWEST NEBRASKA THIS AFTERNOON AS UPPER LOW MOVES EAST THROUGH THE DAY. WITH UPPER LOW OVER HEAD WINDS TO BE ON THE LIGHT SIDE. CHANCES OF PRECIPITATION GREATLY DIMINISH THIS EVENING AS UPPER LOW MOVES EAST AND HEATING OF THE DAY IS LOST.
A COLD FRONT CURRENTLY EXTENDS FROM SOUTHEAST KANSAS THROUGH CENTRAL OKLAHOMA AND INTO NORTHWEST TEXAS. THE COLD FRONT WILL CONTINUE TO MOVE EAST ACROSS ARKANSAS TONIGHT WITH MORE SHOWERS AND ISOLATED THUNDERSTORMS EXPECTED TO DEVELOP AND MOVE INTO THE FORECAST AREA. THE COLD FRONT WILL MOVE INTO THE FORECAST AREA THURSDAY SO THIS WILL BE THE MOST LIKELY TIME FRAME FOR THUNDERSTORMS. THE COLD FRONT WILL MOVE ACROSS THE MISSISSIPPI RIVER THURSDAY NIGHT WITH MORE SHOWERS AND THUNDERSTORMS EXPECTED.
1224 PM EDT WED APR 20 2016 HIGH PRESSURE WILL PROVIDE PLEASANT SPRING WEATHER THROUGH THURSDAY MORNING.
904 AM EDT WED APR 20 2016 HIGH PRESSURE BUILDS ACROSS THE REGION MID WEEK WITH A LOW PRESSURE SYSTEM IMPACTING THE MID-ATLANTIC THE SECOND HALF OF THE WEEK. FINALLY PUSHING ON TO THE SOUTH THURS NIGHT AS AN APPROACHING LOW PRESSURE SYSTEM NUDGES IT OUT. PCPN IMPACTS MAINLY WEST OF THE BLUE RIDGE DURING THE DAY THURS. PCPN LOOKS TO HOLD OFF FOR EASTERN PORTIONS OF THE CWA TILL FRI WITH THE RIDGE PUSHING TO THE EAST. THE XTND FCST IN THE MID ATLC WL LARGELY BE DRIVEN BY A DVLPG CYCLONE IN SERN CNDA. WINDS INCREASE THURS BY MID MORNING WITH THE APPROACHING COLD FRONT.
1053 AM EDT WED APR 20 2016 A WARM FRONT WILL LIFT NORTH INTO THE REGION THIS AFTERNOON INTO TONIGHT.
Brong High pressure will keep temperatures well above average through Thursday with westerly afternoon breezes.
HIGH PRESSURE ALOFT WILL LEAD TO A WARMING TREND ACROSS THE REGION THROUGH THE END OF THE WORK WEEK.
930 AM EDT WED APR 20 2016 HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTH THROUGH TONIGHT, THEN GRADUALLY MOVE OFFSHORE THURSDAY.
COLD FRONT DROPS ACROSS THE AREA TOMORROW LIKELY BRINGING ANOTHER BAND OF SHOWERS AND THUNDERSTORMS THROUGH.
714 AM EDT WED APR 20 2016 HIGH PRESSURE WILL BUILD OVER THE AREA FROM THE NORTH THROUGH TODAY. THE HIGH MOVES OFF THE COAST THURSDAY.
IN THE LOW LEVELS OF THE ATMOSPHERE. AN AREA OF HIGH PRESSURE WILL BE CENTERED OVER CHESAPEAKE BAY THIS AFTERNOON. AN AREA OF HIGH PRESSURE WILL BE LOCATED NEAR THE SOUTHEAST COAST OF THE UNITED STATES TODAY. A RIDGE OF HIGH PRESSURE OVER THE EAST COAST OF FLORIDA WILL MOVE EASTWARD THIS AFTERNOON.
This activity was in part due to a well-defined short wave trof rotating through the central Plains. Further south the coverage of precipitation in advance of the short wave trof consisted of small bands and scattered showers. In the wake of this morning activity, additional showers and thunderstorms, possibly a broken line, are expected to develop around mid afternoon across eastern MO along/ahead of the advancing cold front pushing then push across SW/SC IL in the evening. Glass The upper low/trof currently centered in western NE will evolve into a mobile positively tilted trof by Thursday. A cold pocket aloft will contribute to weak instability, peaking with diurnal heating, and will support scattered primarily afternoon and early evening showers and thunderstorms along a secondary cold front.
HIGH TEMPERATURES WILL BE IN THE LOWER TO MID 60S ACROSS THE REGION. THE NORTHERN STREAM WILL BEGIN TO ABSORB THE UPPER LOW THURSDAY AS A TROUGH SLIDES SOUTHEAST TOWARD THE GREAT LAKES. DRY SLOTTING INTO SOUTHEAST MN AND CENTRAL/SOUTHERN WI MAY TEMPORARILY END THE RAIN THERE UNTIL THE LOW BEGINS HEADING EAST THURSDAY NIGHT. THERE WILL BE A THERMAL RIDGE AHEAD OF AN APPROACHING COLD FRONT THURSDAY AFTERNOON. WHERE CLOUDS AND RAIN PERSIST HIGHS WILL PROBABLY REMAIN IN THE LOW 60S OR COOLER.
EARLY MORNING SATELLITE DEPICTS LOW CLOUDS MAINLY ACROSS THE MIDDLE VALLEY INCLUDING MFE WITH PATCHES ACROSS THE LOWER VALLEY AND RANCHLANDS. LATER THIS AFTERNOON AND TONIGHT ANOTHER ROUND OF THUNDERSTORMS WILL DEVELOP ACROSS THE HIGHER TERRAIN OF MEXICO AND MOVE INTO THE WESTERN SECTIONS OF THE CWA.
338 AM CDT MON JUN 13 2016 (Today and tonight) Upper level high pressure building in from the south will suppress most shower and thunderstorm development today. However, have a slight chance of storms, north and east of Abilene, where the upper ridge is weaker and under influence of northwest flow aloft. Temperatures will be rising to highs in the lower/mid 90s today. Low level moisture will remain over the region with dew points in the lower 70s.
321 AM EDT MON JUN 13 2016 A weak cold front will move through the region during the daytime hours. Drier and slightly cooler air will spread across the area behind the front. Morning lows expected in the lower to mid 70s. Tonight: Weak upper level ridging will hold across the area tonight. Upper level ridge weakening Tuesday and low-level moisture expected to increase with precipitable water increasing to around 2 inches by Tuesday afternoon.
Drier and warmer mid level air will work its way into the region which will produce hotter afternoon temps. Afternoon temps will reach the mid/upper 90s with heat indices around 105 degrees inland to the lower 90s degrees with heat indices of 100 to 105 degrees along the coast. The upper ridge over the area nudges east while a short wave trough moves east across the gulf coast. Afternoon temps a couple of degrees cooler due to more cloud cover but manage to make it to the lower/mid 90s with heat indices 100 to 105 degrees inland to around 90 with heat indices around 100 degrees along coast.
Therefore expecting nothing more than virga or an isolated sprinkle from the high overcast cloud deck.
236 AM CDT MON JUN 13 2016 During the short term phase of the forecast, we will continue to see the high amplitude long wave ridge aloft fill and dirty as a developing heat Low migrates across the mid South and Tennessee Valley. Looking at model sounding data, we see lapse rates from 6 to 9 C/km in the lower 6 km of the trop today. The heat Low appears to migrate a little further east, as H5 height falls in the High Plains signal a subtly shifting pattern in evolution. Lower trop southerlies are established FA wide, with surface TD's now firmly in the lower 70s.
640 AM EDT MON JUN 13 2016 Low pressure will remain stalled just to our northeast today. The gusty northwest breeze around this low will continue today, along with seasonably cool temperatures and unsettled weather.
The story with Tuesday onward, is that a strong 590 dm ridge will build across the Great Plains.
109 AM EDT MON JUN 13 2016 Cold front continues southward push.
Becoming wet, breezy, and dramatically cooler by Tuesday. Some isolated showers and thunderstorms should develop for southwest Montana this afternoon ahead of an approaching cold front, but activity will remain limited. The more important feature will be the cold frontal system moving through central Idaho/northwest Montana by tonight, and through western Montana early Tuesday. Valley temperatures will struggle to reach above 40s and 50s Tuesday afternoon as this cooler air stalls over the area. In addition, the cooler, wet weather could bring snow to high elevation peaks.
Afternoon highs on Monday will be a bit warmer than today. For Tuesday, an upper level trof will approach western Montana by late in the day, resulting in scattered showers and thunderstorms developing across the entire region. The upper level trough will continue to push eastward and is expected to bring a Pacific cold front through the forecast area for cooler temperatures on Tuesday with another round of scattered showers and thunderstorms by afternoon.
/issued 929 PM CDT SUN JUN 12 2016/ Weak surface boundary along the Red River of Northeast Texas and Southeast Oklahoma combined with an upper-trough and enhanced sea-breeze contributing to strong thunderstorms across the region during much of the evening.
612 AM EDT MON JUN 13 2016 High pressure will remain over the area today into Tuesday.
Upper level trough to the south of the area will continue moving north and east as it get absorbed into a southwest flow of another upper low off the coast. As the stronger low off the coast continues to dig south, models are in good agreement with a cold front moving through tonight and into Tuesday morning.
Meanwhile, a very weak surface cold front had moved to a OLU to LCG line at 07z. Isolated thunderstorms were finally beginning to develop behind the cold front this morning. Surface dewpoints will also be in the lower 70s contributing to CAPE values of 2000-3000 J/kg, combined with a plume of steeper mid level lapse rates.
But in the mid-levels, the eastward translation of the ridge axis will be a bit slower. Ridging will dominate the remainder of the workweek, and abundant sunshine will push afternoon temperatures above normal.
Another low pressure system will bring cooling to northern California beginning Monday with temps well-below average by mid-week. Deeper trough presently over the Gulf of Alaska will move to the vicinity of the PacNW this week and will result in a renewed cooling trend for interior NorCal along with locally gusty southwest winds which will last through much of the week.
Warmer than normal temperatures will be the rule for much of the work week with broad upper ridging over the eastern half of the country. While enough to provide warm temperatures, the ridging will not be strong enough to keep the weather dry beyond today.
Low pressure over the area today will lead to a chance of showers and thunderstorms in the Sierra and over portions of central Nye, Lincoln, Clark, and northern Mohave counties.
Both moisture and instability increase ahead of the trough, however, values remain marginal at worst, and are confined to the western third of the forecast area into tonight. Monday night as the trough slides east and the next mid level wave approaches storms push into the central part of the state. Seasonably warm today then cooler under a lot of clouds on Tuesday.
In the large scale, an upper trough moves through the Great Basin tonight then through this forecast area Monday afternoon-overnight. Monday night, thundershowers continue through the evening within the trough and cold advection aloft. Tuesday the trough works onto the plains with weak ridging building in from the west.
Storms will die off after sunset, but more convection is expected beginning Monday morning as a weak upper low shifts overhead.
619 AM EDT MON JUN 13 2016 Cold front stalls to our south.
127 AM EDT MON JUN 13 2016 Weather tonight will be quiet as high pressure settles into the region. It will be cooler tonight with lows in the low to mid 50s.
The southwestern extent of the Mesoscale Convective System has diminished in coverage and intensity with the northeastern storms continuing in closer proximity to the weak upper low and a weak surface boundary. This is primarily due to a building upper ridge into West Texas. High temperatures today will top out in the lower 90s to the upper 90s with the higher temperatures in the western and southwestern counties. Temperatures will likely be a degree or two higher tomorrow as the upper high slightly strengthens and moves farther to the east. Dewpoint values will be in the lower to upper 70s during the afternoon hours and this will lead to heat index values approaching advisory levels of 108 degrees but should be just short.
407 AM CDT MON JUN 13 2016 Broad upper ridging situated across the central CONUS can best describe the main upper level pattern across the region, with troughs along the west and east coasts. The circulation around the upper ridge was bringing a light NW flow across this portion of the Tennessee Valley. The above noted eastern trough was also bringing a frontal boundary southward along the east coast, now extending from southern Illinois to southern North Carolina. It was being pushed southward by cooler high pressure moving southward toward the Great Lakes from Ontario/Quebec.
350 AM MDT MON JUN 13 2016 An upper level trough over the western Great Basin will be filling and ejecting northeast through the region today. Tuesday will be a down day with storms more diurnally and terrain driven, focused on the higher elevations. This cooler weather will be short-lived as we start climbing back toward normal and beyond by Tuesday.
313 AM MST MON JUN 13 2016 A dry low pressure system will continue to move across the southwest US through Tuesday keeping temperatures near normal.
412 AM CDT MON JUN 13 2016 A weak upper level low pressure system will move slowly across the Lower Mississippi Valley over the next few days.
The low level jet pretty weak this morning only clocking in at about 10kts, and there's ridging through much of the troposphere so I'm having a difficult time finding a reason to believe there will be much more than very isolated convection through the morning, and forecast soundings are hinting that there should be some drying between 850mb and 700mb which would put a damper on the current convection.
5 inches have materialized with heavy thunderstorms producing an inch of rain in 30 minutes at Pine Ridge. Pops are generally limited to 30 percent today with temperatures rising into the lower 80s and partly to mostly cloudy skies. Lingering rain and thunderstorm chances stick around through Tuesday as low pressure moves off to the northeast.
A ridge of high pressure that has dominated the region with mainly dry conditions will slowly drift east allowing for a low pressure system to approach pacnw today. The low pressure system moves toward vancouver island and remains stationary over this area tonight and tomorrow spinning disturbances across our region through the beginning of the work week. The low pressure system will increase pcpn chances across the two state area especially over and near our area mtns that includes our eastern mountains Monday night. A cooling trend is expected with afternoon temps mainly in the 70s today and then becoming unseasonably cool Tuesday rising only into the 60s across the basin with even cooler temps in the mountains.
330 AM PDT MON JUN 13 2016 Another low pressure system will bring cooling to northern California beginning today. Clear skies across interior NorCal early this morning as short- wave ridge moves overhead. Temperatures are generally a little cooler compared to 24 hours ago and range from the mid 30s to lower 40s in the mountain valleys to the 50s and 60s elsewhere. Warm and dry weather continues today in the wake of the weekend trough.
Warmer temperatures are expected by the weekend. What's left of an upper level low is now a very small circulation in western NV, associated with a 500mb trof that extends southward into southern CA. A few isolated showers moving northward persist this morning ahead of this upper level low and dry line, where weak divergence aloft exist. As this 500mb trof lifts northeast in response to the advancing polar front jet mentioned above, scattered showers and thunderstorms will develop in mainly eastern NV. On Tuesday, this cold front becomes more of a stationary front as it slides to east or southeast through the area. High temps will drop behind the cold front, only climbing into the mid 60s to mid 70s.
A weak upper level low was located across Oklahoma and was supporting some showers and storms across eastern Oklahoma and western Arkansas. This upper low is expected to slowly track eastward today and into tonight. As for temperatures and heat indices, will see highs in the lower 90s in many areas with heat index values approaching or slightly over 100 degrees across southeast Kansas into western Missouri. Despite low probabilities of diurnally driven convection, upper ridge builds across the area, resulting in increasing temperatures and humidities.
315 AM CDT MON JUN 13 2016 Surface cold front has nudged east into northwest Iowa and southwest Minnesota early this morning. With some mid level instability in place aided by the low level jet, a few high based thunderstorms have popped up along the elevated. Upper trough near the Four Corners region advances northeast today and tonight.
414 AM CDT MON JUN 13 2016 An area of high pressure will settle over the region today with dry and stable conditions expected. An area of low pressure approaching the region from the west tonight will interact with the LLM to result in convective development. there is some concern for severe storms in southeastern SD where ML Cape values could exceed 1000 J/KG ahead of a cold front/dryline.
Main concern over the next several days will be the excessive heat expected across much of the area as upper ridge begins to build into the southern plains.
High temperatures outside of the higher terrain are expected to reach the middle to upper 90s with dewpoints in the upper 60s and lower 70s and should yield Heat Index values of at least 100 degrees. This boundary begins to move back east as a warm front Tues morning as The upper ridging breaks down and upper trough moves east across the MS river valley.
619 AM EDT MON JUN 13 2016 A weak cold front will move through the region during the daytime hours. Drier and slightly cooler air will spread across the area behind the front. Tonight: Weak upper level ridging will hold across the area tonight. Upper level ridge weakening Tuesday and low-level moisture expected to increase with precipitable water increasing to around 2 inches by Tuesday afternoon.
Back to normal June, as a front arriving today will usher cooler air mass into the region.
403 AM CDT MON JUN 13 2016 Satellite/radar imagery continues to show showers and embedded tstms in the base of the trof situated over NE/E Tx. This trof should sag southeastward through the day and provide the last decent shot of rainfall across the region for the next several days. Rain chances will taper off Tuesday and disappear by midweek as ridging builds overhead. Upper ridge should eventually flatten and become centered in Arizona & New Mexico later in the weekend.
334 AM CDT MON JUN 13 2016 Dry pattern of late starts to adjust through the short term as convection off the high plains and an approaching upper system start to drive rain chances further eastward into our area. Highs a few degrees cooler today in the middle to upper 80s and overnight lows again near 70. Sunrise on Tuesday morning the low level jet will be centered over central KS, and nosing into southern NE. The low level jet will be in the weakening phase, and should no longer provide a focus for moisture and lift. This is when the mid level trough lifts out over the plains and pushes a front/dry line through the area. The upper ridge quickly builds back over the plains and 850 temps soar to 25-30 C.
Today Through Tuesday Night The weak upper low will continue to meander over AR through tonight. Some remnants of the weak upper low will be over the state early on Tue. with chances decreasing during the afternoon and overnight period late Tue as upper level ridging is expected. Highs on Tue should be a couple deg warmer as less precip and cloud cover is expected at this time.
641 AM EDT MON JUN 13 2016 Cold front stalls to our south.
143 AM EDT MON JUN 13 2016 High pressure will build over the area for tonight and Monday.
245 AM EDT MON JUN 13 2016 Cold front stalls to our south.
Upper trough over the Great Basin this morning will lift eastward through the central Rockies today and tonight, providing large scale upward vertical motion and aiding in convective development across southern Colorado into this evening. At the surface, stationary front across nern NM and the TX panhandle this morning will begin to lift northward into Colorado as low pressure gradually spins up around La Junta by midday. The upper level trof moves out of eastern Colorado Tuesday and into the plains Tuesday night.
149 AM EDT MON JUN 13 2016 A cooler and drier airmass will prevail over the region today, in the wake of a backdoor cold frontal passage early this morning. A backdoor cold front (located in southern VA at 05Z) will surge southward through central NC by 12Z, advecting a thoroughly dry/ stable airmass into the region. The cool/dry airmass deposited in the wake of the backdoor cold front will result in high temperatures significantly cooler than yesterday, ranging from ~80F in the Northern Piedmont and NE Coastal Plain to mid 80s (84- 87F) in the Southwest Piedmont. Expect highs Tuesday rebounding into the lower 90s, with lows Tuesday night rebounding into the lower to mid 70s.
556 AM EDT MON JUN 13 2016 A cooler and drier air mass will prevail over the region today, in the wake of a backdoor cold frontal passage early this morning. A backdoor cold front (located in southern VA at 05Z) will surge southward through central NC by 12Z, advecting a thoroughly dry/ stable airmass into the region. The cool/dry airmass deposited in the wake of the backdoor cold front will result in high temperatures significantly cooler than yesterday, ranging from ~80F in the Northern Piedmont and NE Coastal Plain to mid 80s (84- 87F) in the Southwest Piedmont. Expect highs Tuesday rebounding into the lower 90s, with lows Tuesday night rebounding into the lower to mid 70s.
Cooler conditions today with a chance of thunderstorms, mainly along and north of I-40. From late this morning into this afternoon, the best chance for showers and storms shifts to central/northern Navajo and Apache counties as the trough moves eastward and begins to fill.
The Florida Keys remain positioned between a subtropical anticyclone to the southwest and a midlatitude cyclone/ long-wave trough the northeast.
Temperatures at the mid levels are slightly cooler today, allowing for steeper lapse rates compared to the last few days.
142 AM EDT MON JUN 13 2016 A large upper level trough of low pressure over the Northeast this afternoon will continue to affect our area tonight through Monday night. We will see plenty of clouds tonight and Monday along with scattered to numerous showers before clouds and precipitation taper off Monday night as the upper low moves far enough away from our area. The rest of the week is shaping up to be rather nice with dry conditions and a noticeably warming trend with temperatures getting back into the lower and middle 80s by the weekend. Northwest flow aloft continues for Monday and Monday night but best potential for sufficient moisture to produce precipitation should be over Vermont as upper low moves far enough east to focus the upslope precipitation move over Vermont.
Upper trough over the ARKLATX region should shift east and gradually weaken tonight and Tuesday.
Some cirrus around due to proximity of high level moisture moving north around the Texas upper high. Tonight will see the 500 mb heights build a bit north again as a stronger short wave moves out of the American southwest and into the high plains.