Aikyam-Lab/Synoptic-Bench huggingface dataset:
253 PM EDT Tue May 2 2017 High pressure for Wednesday. An upper low brings unsettled and much cooler weather to end the work week. Latest satellite imagery shows an upper level low is centered over Lake Superior. As a result, clouds associated with the upper low cover much of the region to our north. Tweaked the lows for tonight and highs on Wednesday to reflect the latest blend of MET/MAV numbers.
Clear skies and light winds will allow temperatures to cool quickly this evening but these should begin to level off overnight, especially in the west where winds will shift to the southwest after midnight as the ridge slides to the east. There is some threat of patchy frost in the northeast toward daybreak where winds will be lightest in the morning and also being closer to the thermal trof. Any threat of precipitation will be near surface trof in western Iowa tomorrow afternoon/evening with only isolated coverage which may skim far northwest/west central portions of the forecast area. Thereafter, upper ridging will build across the central United States with amplified flow with large trofs on the east coast and west coast.
Cooler weather with showers possible towards the end of the week into the weekend. Another day of quiet weather across NorCal as ridge continues to build over the region.
and some clouds streaming into the northeastern half of the state breaking up slowly as the low drifts further to the north. Flow becomes more westerly as the day progresses and a brief break in the precip and general breaks in the clouds will allow for some sunshine to bring the max temps up to the lower 60s in the southern half of the state. but generally a denser cloud cover to the north may keep the high temps in the mid to upper 50s. Unfortunately, even the warmer temperatures will not translate completely as the winds will stay up and rather gusty out of the west. Overnight and into Wednesday morning, a wave digs into the High Plains.
The ridge axis will advance through the region this evening, so look for winds to reduce and skies to become mostly clear overnight, especially over northwest Wisconsin. Decreasing chances of precipitation will continue into the evening as the trough moves through the region, although these chances will start to ramp down by the late afternoon.
139 PM EDT Tue May 2 2017 An approaching trough of low pressure will produce occasional showers today with temperatures mainly in the 50s to lower 60s.
Upper level trough is progressing eastward this afternoon toward the Rockies. Temperatures tomorrow night will cool quickly with lows into the low to mid 60s for everyone.
536 PM EDT Tue May 2 2017 Isolated showers are possible tonight with a crossing trough. Dry weather under high pressure is expected Wednesday before low pressure returns periodic rain chances Wednesday night thorough the weekend. Otherwise, broad troughing should maintain clouds and isolated to locally scattered showers tonight. Building high pressure should result in dry and clearing weather Wednesday, though a late day increase in clouds is expected again across OH in warm advection ahead of approaching low pressure. Energy digging into the central Plains on Wednesday will develop into a closed low pressure center by Wednesday night.
Southwest winds around 10 knots from KSRQ south to KFMY will shift to the west and northwest after 20Z as a cold front sinks south into the southern peninsula.
Satellite showing ridging along the west coast of North America with northwest flow aloft over the central portion of the country. Based on the best performing guidance, what happened last night, and rather thick cloud cover, chose to go toward the warmer guidance for mins. Cloud cover and cold front moving through will keep temperatures from rising too much. Will tend toward the cooler guidance.
228 PM EDT Tue May 2 2017 High pressure for Wednesday. An upper low brings unsettled and much cooler weather to end the work week. Latest satellite imagery shows an upper level low is centered over Lake Superior. As a result, clouds associated with the upper low cover much of the region to our north. Tweaked the lows for tonight and highs on Wednesday to reflect the latest blend of MET/MAV numbers. Also, clouds will be on the increase as a warm front approaches.
1213 PM CDT Tue May 2 2017 More seasonal spring pattern returns to the region during the period as deep upper low that brought snow to some areas yesterday continues to track toward eastern Canada. Increasing chance of showers and a few thunderstorms will develop during the day Wednesday as a weak cold front moves through the area in association with the upper wave. Showers diminish and end Wednesday evening as the upper wave moves east of the area followed by increasing heights as system tracks into the lower Mississippi Valley.
With the dry air and sunny skies, temperatures have warmed quickly with readings in the lower 60s. Otherwise, expect temperatures to top out in the low to mid 60s. Look for a small ridge to northwest flow embedded in the main 500mb trough to move across the region today. The trough will deepen across the Plains States for tonight through Wednesday.
QPF values expected to be on the light side and snowfall limited to the higher passes, generally at or above 9k. While not huge, it's something and with relatively low freezing levels based off the 00Z sounding last evening, could see a few hailers this afternoon, albeit small stuff. Once this system exits later tonight, high pressure will be taking control of the weather. This will bring a return of dry and much warmer conditions by Wednesday afternoon. Winds will pick up during peak heating with gusts in the 25 to 35 mph range possible, especially over the higher exposed ridges. Strong ridge of high pressure will be building overhead as we close out the work week.
the lower levels up to 800 mb will be fairly dry, limiting some of the showers from reaching the ground.
High pressure is slowly moving over the region and will bring a significant warming trend to the area over the next few days. Over the weekend the next storm will usher in cooler temperatures, gusty winds, and increasing chances for precipitation.
This will push the upper level trof axis and an associated cold front into Eastern Oklahoma Wednesday morning and into Northwest Arkansas Wednesday afternoon/evening. Expected ongoing showers and thunderstorms Wednesday morning should continue to move eastward across the CWA with additional development along and near the cold front as it moves through the region. Behind the eastward moving cold front. gusty northwesterly winds in the 20 to 35+mph range and cooler conditions are forecast. behind the cold front. rain chances will remain possible mainly over far Eastern Oklahoma into Northwest Arkansas as the wave wraps up and becomes a closed low over the region.
Otherwise look for the winds to lay down in earnest this evening as surface ridging settles into the Ohio Valley. Next weathermaker will take shape late Wednesday and Wednesday night as an upper trof digs into the southern Plains and closes off over the Ozarks. High POPs will also extend southward through Kentucky by late Wednesday night, mainly west of I-65 where the low-level jet sets up.
At this time, anticipating warm front to move from the gulf and bring a focus for potentially tornadic supercells by the early afternoon hours closer to the Atchafalaya Bay which will then move northward during the afternoon hours.
This system is not all that cold and therefore the pcpn wl mostly be rain today and this evening, except for the higher mtn peaks, where a couple inches of accumulation will be possible. Strong northerly flow aloft progged across the area Wednesday morning, slowly moderates through Wednesday night, as an embedded short wave translates through the Rockies and into the High Plains Wednesday afternoon. Temperatures to be near to slightly cooler than seasonal levels in the mid 50s to lower 60s across the lower elevations and mainly 30s and 40s across the higher terrain, with lows expected to remain above the freezing mark across the eastern plains Wednesday night.
305 PM EDT Tue May 2 2017 An approaching trough of low pressure will produce occasional showers today with temperatures mainly in the 50s to lower 60s.
311 PM CDT Tue May 2 2017 There is a closed low over Great Lakes with a deep trough into the southeast CONUS and a cold frontal boundary along the Atlantic Seaboard this morning. There is a ridge into western Canada with a disturbance moving southeast into the northern plains in fast northwest flow. There is a trough over the desert southwest into Baja. Wednesday increased forcing over the forecast area as inverted trough moves across eastern Nebraska. Increased instability Wednesday afternoon with forcing along the trough and 120+ upper jet nosing into western Nebraska will continue thunderstorms over north central.
Upper trough will pivot overhead today. Closer to the low pressure center, shower chances will continue, with the highest PoPs situated north of PIT.
129 PM EDT Tue May 2 2017 High pressure returns today, then remains in place through Wednesday night.
00z models are in good agreement that the cyclonic flow will continue into the early afternoon and then a ridge of high pressure will build across the region. This will result in temperatures in central Wisconsin falling into the mid and upper 20s and into the lower and mid 30s across southwest and west-central Wisconsin.
mainly on the east and west edges of the trough (James Valley and southwest ND respectively). A high amplitude ridge moves into the Northern Plains by this weekend.
Temperatures will be warmer than yesterday, with the cloudiness largely confined to the northern half of the forecast area through mid to late afternoon. Changes were made to the Sky cover to line up with this thinking, with other minor changes to the high temperatures and temperature trends.
318 PM EDT Tue May 2 2017 Upper air pattern consists of a 500 mb closed low over ern Ontario which moves to western Quebec by this evening. Overall, the forecast is pretty quiet as the closed low continues to move away and allow drier air into the area which will decrease the cloud cover.
130 PM EDT Tue May 2 2017 The center of high pressure will build over the region tonight and will linger into the mid week, providing dry weather through Wednesday night.
530 PM CDT Tue May 2 2017 An upper level disturbance will combine with a cold front to bring a chance of showers and thunderstorms to the DHT and GUY TAF sites tonight. The low clouds will then slowly lift during the day on Wednesday. North winds will gust to around 30 knots behind the cold front. /Issued 525 PM CDT Tue May 2 2017/ For tonight, a cold front will move through the Oklahoma and Texas Panhandles.
309 PM CDT Tue May 2 2017 18Z surface data has high pressure from Minnesota into the central Plains. After sunset, dry and cold conditions will be seen across the area as high pressure moves through the Midwest. Favored cold areas north of I-80 have the potential to see temperatures below freezing with some very localized areas below 30 degrees possible. The coldest temperatures will be in the far south with the warmest in the highway 20 corridor.
High pressure for Wednesday. An upper low brings unsettled and much cooler weather to end the work week. Latest satellite imagery shows an upper level low is centered over Lake Superior. As a result, clouds associated with the upper low cover much of the region to our north. Tweaked the lows for tonight and highs on Wednesday to reflect the latest blend of MET/MAV numbers.
Trough will be slow to move out of the region and expect clouds to linger along with some showers in the morning. Expect max temps tomorrow to be a tad bit cooler than today.
Cloud cover will continue to thin and decrease this evening as the low pressure that brought scattered showers this morning exits to the east. Tomorrow, a strong ridge of high pressure will continue to build over the Northern Rockies, causing temperatures to warm significantly. Lingering high clouds will limit temperatures from reaching their full potential, but expect them to be about ten degrees warmer than today, which will bring values to near seasonal averages.
501 PM EDT Tue May 2 2017 A cold front will approach later tonight then cross the region Wednesday.
High pressure will build overhead Tonight providing clear skies. High pressure will build to the Northeast on Wednesday. Moderate return flow expected Wed night with the approach of a fairly robust cold frontal system.
Temperatures dropping into the lower to mid 30s in these areas could result in areas of frost. This should occur with the loss of daytime heating and as the cyclonic flow weakens as high pressure builds in from the west. This high will drift east across the area overnight and provide mostly clear skies for a good share of the night. For areas west of the Mississippi River, expecting to see an increase in high clouds overnight that will cut off the good radiation conditions and keep the temperatures a little bit warmer. The increase in high clouds will occur ahead of an approaching short wave trough. This trough is still expected to drop well south of the area to form a cut off low over the lower Missouri River Valley into the mid Mississippi River Valley Wednesday night.
327 PM EDT Tue May 2 2017 An upper level trough of low pressure will be moving across the area tonight and Wednesday. Expect clouds and plenty of showers tonight before the showers become more confined to the higher terrain on Wednesday.
154 PM MDT Tue May 2 2017 Latest upper air analysis shows northwest flow over the High Plains. Tonight the short wave trough and associated isentropic lift will move east across the rest of the forecast area. Unfortunately this short wave trough will be moving fairly quickly, so am not expecting more than a tenth of an inch of rainfall from it. Rainfall will end from west to east overnight as the 500mb trough axis moves through. A cold front will move through overnight, causing winds to turn to north.
This will be especially true over the higher terrain of the Black Hills where Froude numbers above one and favorable 0-2km moisture profiles suggest enhanced snowfall rates from 06z-15z over the northern Black Hills.
Ahead of the trough, modest moisture return has occurred across much of southern Oklahoma and western north Texas. Most model sounding suggest that a capping inversion will prevent thunderstorm development through the daylight hours, however, a storm or two may develop, especially where near surface moisture can pool near a warm front. Perhaps better coverage will be in southern Kansas along and near a 7h trough axis. As the trough continues south and east, better chances for scattered to widespread showers and storms will be across south central and southeastern Oklahoma, where moisture return will continue to increase.
Weak high pressure will build across Indiana today. Yet another low pressure system is expected to develop over the Central Plains on Wednesday. pushing a warm front toward Indiana on Wednesday night. The low is then expected to push into the Ohio valley for the end of the work week.
Warmer temperatures with light to breezy westerly winds and mostly clear to partly cloudy skies are anticipated for Wednesday.
High pressure provides a mostly dry Wednesday, but a large upper level system will bring rain thereafter into the weekend. An upper trough will pivot from the northern Great Lakes to Quebec overnight. Energy digging into the central Plains on Wednesday will develop into a closed low pressure center by Wednesday night.
344 PM EDT Tue May 2 2017 High pressure will build over the area through Wednesday.
Strong high pressure will then build over the region through the rest of the week bringing a warming trend.
High pressure and a much drier airmass will build into the area tonight behind a cold front. Mostly sunny skies are expected with afternoon high temperatures mainly in the low to mid 80s.
An upper level trough will slide out of the northern Rockies tonight and will track across the northern and central plains tomorrow. High temperatures should remain a touch below normal in the upper 50s to the lower 60s due to the clouds and possible showers.
A fast moving cold front will pass through KABI and KSJT by noon tomorrow with southerly winds shifting to the northwest. Highs will generally be in the low to mid 90s, with south winds increasing to 10 to 20 mph, along with higher gusts. Overnight low temperatures will generally be in the low to mid 60s. Isolated showers and thunderstorms will be possible across the northern Big Country early Wednesday morning along with a wind shift to the north at 10 to 15 mph, as the cold front moves into the region.
High pressure will build over the area today keeping the weather dry. The initially cold advection will become neutral and then warm during the course of the day, but the filtering from the high clouds will keep high temperatures in the low to mid 70s late in the afternoon as flow turns more southerly. High pressure will move off to the east of the area tonight, but the next approaching low and forcing will remain to the west.
/issued 251 AM CDT Mon May 22 2017/ RAP and IR satellite analysis showed a large upper level low pressure center spinning over the US/Canadian border along the Minnesota state line this morning. This low is large enough currently to be dominating much of the flow in the CONUS minus the extreme western CONUS where a ridge of high pressure is beginning to build. A cold front will be driving southward overnight, and storms are expected to fire ahead of this feature.
High pressure will maintain very warm and dry conditions for inland areas through today.
Band of showers currently moving through most of the central and eastern zones from north to south ahead of an approaching low pressure system. Ridging moves into the region on Tuesday which will clear out the rain chances and warm temperatures up into the low to mid 70s.
607 AM CDT Mon May 22 2017 Isentropic ascent in the 300K to 310K layer, ahead of an upper level trough sliding south through Plains, will lead to scattered showers and a few thunderstorms today. But a freezing level of around 8000 ft during the afternoon may enable small hail in the strongest cells. For Tuesday, the upper trough will be situated overhead. Given the cold air aloft, with a freezing level down to as low as 6000 ft, the 200 to 300 J/kg of MUCAPE will likely be enough to get scattered showers and a few thunderstorms again. The strongest cells may be able to produce small hail given the low freezing levels.
overall it will be a cooler week and holiday weekend than we have be used to, with daily rain chances from mid week through the holiday weekend. Rapidly drying dewpoints are evident across much of Ohio as a cold front slices through the area early this morning. A digging upper low will linger back toward the Mississippi Valley through mid-week. The lone exception to this may be the ridges.
Ridge of high pressure will be transitioning over the forecast area providing above normal temperatures and light winds under clear skies.
Drier and warmer weather conditions are expected tonight and Tuesday with an upper level ridge advancing into the region with associated height rises. Main feature for midweek on is a strong upper low swinging across western Canada.
Rain and isolated storm chances return Tue aftn and evng as a cold front makes its way into the region.
Cold front will progress over terminals tonight with gusty north winds and MVFR stratcu mainly north and west Oklahoma terminals to end forecast period. /issued 320 AM CDT Mon May 22 2017/ Potent s/wv will move over central/southern Rockies today ahead of main trough, allowing the increase in showers and storms across the region. In the wake of mentioned trough, a cold front will make its way over the region tonight and early Tuesday. In wake of the front, cold upper trough will progress over the Southern Plains which may allow development of showers and isolated storms through Tuesday afternoon mainly over central and southeast portions of Oklahoma, with severe storms unlikely.
Aloft, upper low continues to spin over northern Minnesota. Factors in favor of rainfall include strengthening cold front moving into Iowa, a strong short wave dropping out of Saskatchewan providing broadscale upper lift, and potential energy phasing between this short wave and the energy associated with the main upper low. Rounds of showers and storms will continue tonight as the cold front slowly works its way across the area.
The best upscale lift will be along and ahead of the 500 mb trough axis, with best shower chances from 18z- 03z, then mainly exiting southwest zones after 06z. Highs from the low 60s northwest to upper 60s southeast. Accompanying the upper trough passage, a cold front will bring increasing northwest winds of 10-20 mph late morning thorugh afternoon.
This wave was ahead of a main trof axis. associated with a parent closed low over Southern Ontario.
Tonight and Tuesday, weak high pressure will build across the area, to temporarily bring drier, seasonable weather.
A noticeable increase in mid clouds is expected during the evening associated with low pressure moving through the border region of Iowa/Wisconsin/Illinois. With the lack of flow, it will be hard to displace the current trough in place centered over the Midwest. The slow evolution of the trough will lead to a fairly dismal forecast with plenty of clouds and periodic showers through most of the week.
1006 AM CDT Mon May 22 2017 Updated the forecast to make higher chance POPs follow more closely to the cold front moving through. Went a little cooler than Superblend across north central Kansas due to expectation of clouds and showers through the morning. Behind the cold front, high temperatures will only reach the low 60s with northwest winds gusting to around 30 MPH. A combination of cold air advection and an amplified upper level low will bring a chance for some light showers, particularly during the afternoon.
A final disturbance in the northwest flow aloft along with a cold front will move quickly through the CWA Tuesday afternoon.
909 AM EDT Mon May 22 2017 A weak cold front will approach from the west today before pushing east through the region tonight.
909 AM EDT Mon May 22 2017 Low pressure located north of Lake Superior will continue to move slowly east across Canada today. High pressure will push up the Ohio Valley later today and move to the east coast on Tuesday.
overall it will be a cooler week and holiday weekend than we have be used to, with daily rain chances from mid week into Memorial Day. A digging upper low will linger back toward the Mississippi Valley through mid-week. The lone exception to this may be the ridges.
As the low moves eastward, winds are forecast to increase over the coastal waters to near 20 knots.
and increased instability ahead of cold front. a weather disturbance and its associated showers/isolated thunderstorms rotating around a low pressure area over Minnesota this morning will be nearly out of the area by 18z with decreasing cloudiness behind it. Lows should range from the upper 30s to around 40 in far eastern Colorado to the low to mid 40s elsewhere. Upper level ridging tries to move in from the west for the rest of the period with no chance of precipitation. Currently have high temperatures in the low to mid 60s with lows in the mid 30s to low 40s.
The region awaits the arrival of a cold front from the north. a weather disturbance and its associated showers/isolated thunderstorms rotating around a low pressure area over Minnesota this morning will be nearly out of the area by 18z with decreasing cloudiness behind it. Lows should range from the upper 30s to around 40 in far eastern Colorado to the low to mid 40s elsewhere. Upper level ridging tries to move in from the west for the rest of the period with no chance of precipitation. Currently have high temperatures in the low to mid 60s with lows in the mid 30s to low 40s.