Aikyam-Lab/Synoptic-Bench huggingface dataset:
VFR conditions are expected to continue through tomorrow as the stalled cold front moves out of the area giving way for sunnier skies. Then the upper level high pressure system reasserts itself tomorrow, resulting in sunny skies with with highs in the low to mid 90s. (Tonight and Monday) A large upper level ridge will be centered across the Desert Southwest through the end of the work week.
1124 PM CDT Mon Jun 19 2017 Currently have an upper trough extending from the Great Lakes into the Ohio valley with nw flow aloft over the northern and central Plains.
710 PM EDT Mon Jun 19 2017 An upper level trough will continue over the region through mid week.
803 PM EDT Mon Jun 19 2017 Water vapor imagery and RUC analysis reveals mid-upper level pattern with a ridge over the western CONUS and broad trough into the central CONUS including the Great Lakes region. Given the fairly weak instability combined with minimal deep layer shear expect only small hail with stronger storms into early this evening despite lower freezing levels of 8-9 kft. Overall, temperatures will warm back to near normal for this time of year by the middle of the week, and then trend a bit cooler for this weekend.
2 inches and a tropical-like airmass with high freezing levels and moist adiabatic profile. Weak lift in the low and upper levels may help maintain a small chance of showers through the night but overall precip will trend downward quite rapidly through the evening. This system will continue to maintain a general south to southeast flow in the low to mid levels and keep cloudy conditions going through Tuesday.
1121 PM EDT Mon Jun 19 2017 A cold front will slowly press into our very humid air mass today. The cold front will continue east of the area on Tuesday. Hail threat may end up being as large as today's threat since freezing levels will be lower.
Temperatures for most areas have been trending cooler this evening thanks to the delta breeze. This will help to bring cooler overnight lows to the Sacramento region and into the Northern San Joaquin valley.
901 PM EDT Mon Jun 19 2017 The upper level trough has pushed a cold front through the region this afternoon.
The upper-level ridge which directed NW flow aloft across our region turns a bit more zonal tonight with increased cloud cover. BMickelson Previous short term discussion: An upper ridge will maintain dry weather conditions into Tuesday. A cold front approaching will bring isolated showers and thunderstorms near the CWA late Tuesday afternoon but this activity is expected to hold off until after the short term period.
1232 AM EDT Tue Jun 20 2017 A cold front will move through the area overnight and offshore by morning.
1026 PM EDT Mon Jun 19 2017 Cooler and slightly drier air is moving in for a couple of days. An upper level trough will approach the region later this week and bring showers and thunderstorms back to the state. Short wave trough moving overhead is producing some showers which are surviving surprisingly farther to the east than expected. Noticeably cooler in central and eastern areas.
However with loss of heating and weakening upper support confidence is low that storms will hold together as they move into the lower elevation valleys. Isolated thunderstorms through this evening near KBNO and KBKE as well as the higher terrain of Southeast Oregon. Expect northwest winds on Tuesday with cold frontal passage.
Meanwhile, a cold front was located just north of the forecast area and will continue to slowly inch southward through the day. Any storms that do development will quickly end during the afternoon hours, as surface winds shift to the northwest and dry air filters into the lower levels as well. Under plentiful sunshine this afternoon, highs will warm into the lower 90s despite the weak northwest flow. Dry, sunny, and warm conditions should prevail on Saturday as a dampened ridge shifts westward across the Southeast with daytime highs in the low 90s.
250 PM CDT Fri Aug 18 2017 Upper level trough axis seen on current water vapor image is essentially centered north to south down our longitude. Some scattered convection toward the I20 corridor has initiated in monsoon moisture shunted south by early morning outflow from MCS in western Oklahoma, while an upper level low squeezes moisture northward out of Big Bend and Central Texas. Though there is still a slight chance of some convection moving off the higher terrain of New Mexico later tonight int the early morning hours, but should remain in vicinity of the state line. As the upper level low currently to our south shifts west and southward, we'll see high pressure build in farther westward which will keep us mostly dry through the weekend.
/issued 1022 AM CDT Fri Aug 18 2017/ At 10 AM around the Mid-South, temperatures are generally in the lower 80s with most of the region experiencing sunny conditions. /issued 354 AM CDT Fri Aug 18 2017/ Drier air is beginning to work into the Mid-South early this morning as a weak cold front slowly moves through the area.
537 PM EDT Fri Aug 18 2017 A cold front will move through late today. An upper trough will move across the area on Saturday.
247 PM EDT Fri Aug 18 2017 Upper trough Saturday brings more showers to northern areas.
237 PM EDT Fri Aug 18 2017 Upper trough Saturday brings more showers to northern areas.
311 PM MDT Fri Aug 18 2017 Mild and breezy conditions continue overnight as a dry cold front moves into Northwest Montana. Temperatures trend cooler through the weekend, but the area will remain dry.
1250 PM CDT Fri Aug 18 2017 Abundant sunshine prevails across central Illinois this morning: however, mid and high clouds associated with low pressure over western Iowa will spill into the Illinois River Valley this afternoon. Quiet weather expected for a short time today as a narrow ridge of high pressure drifts eastward. Temperatures will still remain on the warmer side, mainly mid 80s, although dew points in the 60s will make it more comfortable.
A dry cold front is approaching western Montana and central Idaho this afternoon. Ahead of the front, dry and breezy conditions will develop late this afternoon into the evening as high pressure begins to flatten. The front will move through tonight, likely maintaining breezy conditions, especially in the higher terrain, into Saturday morning. The cold front will stall across southwest Montana for Saturday. Cooler temperatures are anticipated for most locations behind the front, though breezy winds will continue, especially in the vicinity of the stalled front.
645 PM EDT Fri Aug 18 2017 Upper trough Saturday brings more showers to northern areas.
Drier air has advected into the region, with afternoon dewpoints in the low to mid 60s. Mid-level cloud cover is expected to increase early Saturday as an upper trough swings in. Low pressure over Iowa this afternoon is forecast to track east across IL/IN tonight, dragging a weak boundary with it. Ridging Saturday night will bring continued fair weather with lows in the mid 60s. Ridging will build in at the surface and aloft over the southeast United States, resulting in dry weather and typically warm summertime temperatures. The 12z versions of the GFS/ECMWF/GEFS continue to feature quite a bit of dry air in the low and mid-levels.
Meanwhile an upper ridge will remain centered offshore and a surface thermal trough will persist along the coast.
247 PM CDT Fri Aug 18 2017 Latest water vapor imagery shows an upper level low over eastern Minnesota, with the upper trough extending southward and through the Central Plains. Across the local area, skies have become mostly clear over the last couple of hours, as high pressure settles in at the surface. The upper trough will push eastward tonight, with its axis swinging through the TN Valley early Saturday morning. Winds will briefly shift to the southwest, filtering in moisture and leading to overnight lows in the lower 70s. The upper trough axis will move east of the forecast area by the afternoon hours on Saturday. Meanwhile, a cold front to our north will shift through the area, bringing a reinforcing shot of drier air across the region.
Moisture will be increasing in the flow aloft to allow convection mainly over the high terrain and Palmer Divide, as well as over the far eastern plains where better low level moisture will be found.
/ISSUED 1026 AM CDT Fri Aug 18 2017/ The main update to the morning forecast was to increase high temperatures a bit along the coast where southwest winds will help temperatures climb into the lower 90s this afternoon before the sea breeze arrives.
1147 AM MDT Fri Aug 18 2017 Fairly benign period of weather as weak split flow under high pressure remains over the southwestern US.
Highs this afternoon in the low to mid 90s. Lee trough strengthens across eastern Colorado into NW Kansas during the afternoon, with south winds increasing in response. NAM forecasts decent convergence and modest CAPE along the lee trough axis near the NW zones by late afternoon. A quickly returning southeasterly upslope flow and sufficient moisture/instability will set the stage for potential thunderstorms in the vicinity of a lee side trough each day as low/mid level lapse rates steepen each afternoon.
Surface analysis showing high pressure covers the entire Rockies from Colorado up into northern Idaho.
313 PM EDT Fri Aug 18 2017 Weak high pressure will slide across the Ohio Valley this this evening and early tonight. Towards morning, weak low pressure associated with a disturbance aloft will drop across the lower Great Lakes and Ohio Valley on Saturday.
Weak southwest flow Saturday will bring warmer temperatures along with more sunshine.
439 PM EDT Fri Aug 18 2017 A warm front will cross the area tonight.
321 PM EDT Fri Aug 18 2017 A warm front will gradually push east of the region tonight. A slow moving cold front will cross the region Saturday.
A few showers or storms remain possible, but given the low chances involved, will not mention in the aviation forecast at this point. A few showers or storms remain possible, but given the low chances involved, will not mention in the aviation forecast at this point.
With mid and upper level drier and cooler air filtering in to the area from the NW.
There is limited convective cloudiness over the mountains, foothills and Palmer ridge. Models have an upper ridge flattening with weak zonal flow aloft tonight and Saturday. For temperatures, Saturday's highs will be 0-3 C warmer than today's highs. Forecast area under zonal flow aloft Sat night and Sun with lowering PW values with downsloping flow off the Front Range and Cheyenne Ridge. T-storm chances remain low on Sun, with convection mainly confined to the high terrain during the afternoon, with a bit more t- storm activity across southwest sections of the CWA during the evening hours with the arrival of moisture up from the Desert Southwest.
646 PM EDT Fri Aug 18 2017 A cold front will move through late today. An upper trough will move across the area on Saturday.
The models continue to show the potential for some isolated showers/tstms over the mtns, although the HRRR also shows a few drifting out over the lower elevations of El Paso and Pueblo counties this evening. With the upper level ridge being over the area on Sat, the chances for pcpn still look quite limited.
A steady H5 ridge of high pressure remains elongated across south- central Texas eastward to the northern Gulf of Mexico. Weak upslope flow and stronger heating on the periphery of the high in Mexico is aiding some showers and thunderstorms west of the Rio Grande River. While the H5 ridge is not overly strong (592DM) tomorrow, very weak CAPE due to strong mixing of the boundary layer will highly limit cloud and convective potential.
These thunderstorms would be more robust as the departing mid-upper wave crosses the upper MS Valley deep- layer shear will greatly increase and with the cold front in the immediate neighborhood the directional shear would be further enhanced. Sat & Sat Night: More thunderstorms should arrive KS Sat Night but with broad mid to upper deck ridging in place most thunderstorms should behave.
Synoptic Setup: Hot Desert Southwest air is moving up intoa ridge running over Wyoming, Montana, and Sasakatchewan. To the northwest a Trough of cool pacific air is drops down from Alasaka through British COlumbia. This afternoon through tonight: Ridge across the area will exit into the Dakotas. Meanwhile, the trough will exit the front range and firms up a cold front behind it. The front itself should by dry with no known moisture source to act on with the low level lift.
245 PM CDT Fri Aug 18 2017 WV imagery shows an upper-lvl ridge extending from New Mexico east thru Texas and the Gulf Coast states out into the Atlantic, bordered to the west by a trough just off the SoCal coast. As mentioned above, the trough will remain in place thru the weekend and into midweek, so best chances for convection will remain out west.
Kept precip chances on the low end, as a few showers or sprinkles are the best this wave will probably produce given the limited moisture. Should see clearing northwest to southeast later tonight into Saturday morning as high pressure moves in.
1123 AM MDT Fri Aug 18 2017 Upper level analysis shows a wave pushing through the northern plains, with a ridge building over the western CONUS, and northwest flow over the CWA. As the upper ridge shifts over the region, weather will become dry and warm. The thermal ridge axis will cross the CWA Saturday, and temperatures will warm into the 90s. At the upper levels, a Canadian trough will begin to flatten the ridge, placing the northern plains in zonal flow. A cold front will push into northwestern SD during the afternoon, creating some breezing winds there.
341 PM EDT Fri Aug 18 2017 A few showers or thunderstorms, could linger into this evening, as a cold front passes through the region.
431 PM EDT Fri Aug 18 2017 A cold front will move through late today. An upper trough will move across the area on Saturday.
356 PM CDT Fri Aug 18 2017 Temperatures as of 3 PM CDT were in the lower to mid 90s across most of Southeast Texas and this heat, combined with some deeper moisture that pushed into the region from the Gulf today, was resulting in heat index values in the 105 to 110 degree range along the coast. Afternoon water vapor imagery depicts an upper low (TUTT) near Florida and this feature is expected to slowly translate west across the Gulf over the next few days.
635 PM EDT Fri Aug 18 2017 A cold front will move through late today. An upper trough will move across the area on Saturday.
219 PM MDT Fri Aug 18 2017 Upper trough is sitting across the eastern half of the CONUS with weak ridging across the northern Rockies into the northern High Plains. At the low levels. northwest flow on the backside of the low pressure across Great Lakes. Upper ridge will weaken Saturday but remain over the northern plains. Cooler temps will then return as the frontal boundary crosses the area late Saturday into the evening.
152 PM EDT Fri Aug 18 2017 Aviation A breezy and cooler day with considerable clouds is in store thanks to a low pressure system centered near Sault Ste Marie.
A cold front approaching the Ohio River before dawn will cross central Kentucky this morning and usher drier air into the region this afternoon. Weak surface ridging will build in from the lower Mississippi Valley this afternoon and tonight with mostly clear skies and nighttime lows in the 60s. The best shot at a shower or thunderstorm will be over southern Indiana and the northern Blue Grass closer to the low.
Drier air has advected into the region, with afternoon dewpoints in the low to mid 60s. Mid-level cloud cover is expected to increase early Saturday as an upper trough swings in. Low pressure over Iowa this afternoon is forecast to track east across IL/IN tonight, dragging a weak boundary with it. Ridging Saturday night will bring continued fair weather with lows in the mid 60s.
Look for one more day of minor warming today as a ridge of high pressure continues to build into our region. Only a few minor adjustments made to this morning's forecast as the low clouds have managed to progress inland. With a building ridge just offshore, this morning's 12Z Oakland sounding shows increasing 500 mb heights compared to 24 hours ago. Synoptically a ridge of high pressure will move across our region today which will lead to a few degrees of warming. Big question will be how much the marine layer will change with the low overhead. SFO Bridge Approach. Expect increasing northwesterly winds to continue through the weekend as high pressure builds over the eastern Pacific.
Drier and cooler mid and upper level air will advect in from the NW.
301 PM EDT Fri Aug 18 2017 A cold front will move through late today. An upper trough will move across the area on Saturday.
321 PM EDT Fri Aug 18 2017 Currently - The combination of a trough over the eastern United States and day time heating over Florida has split the ridge that had extended across the peninsula. Isolated showers and thunderstorms are present across the area with island cloud lines attempting to form over at least the Lower Keys.
208 PM EDT Fri Aug 18 2017 A weak high pressure ridge will move across our area today providing dry weather. A secondary cold front will move through tonight and Saturday, likely causing showers and a few thunderstorms.
618 AM CDT Thu Apr 20 2017 Some SHRA/TSRA will be possible across the NRN terminals as an outflow boundary and cold front approach those sites. and a cold front further north. Temps on Fri will also range significantly across the CWA with the cold front dropping further south.
Elsewhere to the south and west, mostly clear conditions have allowed temperatures to warm quickly into the lower to mid 70s as of 15z. Chattanooga Airport, TN 83 62 83 62 / 30 20 60 50 Knoxville McGhee Tyson Airport, TN 83 62 80 61 / 30 20 60 50 Oak Ridge, TN 84 61 79 61 / 30 30 60 60 Tri Cities Airport, TN 79 58 77 57 / 50 30 70 60.
815 AM EDT Thu Apr 20 2017 Ridge of high pressure will remain over the area through early Friday with the remains of a frontal boundary north of the area.
Showers were moving toward the northeast ahead of a trough axis that extended from Vancouver island through southeast Oregon. The trough will move through our CWA today and the air mass will destabilize producing isolated thunderstorms this afternoon and evening. A short wave trough entering the Pacific Northwest will bring showers and thunderstorms to the region today. Thunderstorm development will be along and ahead of the trough axis which swings through the area this afternoon. Showers dissipate this evening as the trough moves east. By Friday morning, only a slight chance of showers exists over northeast Valley county, otherwise conditions are dry and cool and breezy as an upper ridge builds in from the Pacific.
1245 PM EDT Thu Apr 20 2017 An approaching cold front will bring showers and thunderstorms through tonight, followed by cooler temperatures into the weekend. This will help increase low level instability, and with increasing shear with the approach of a mid level closed low over the Great Lakes will help fire showers and thunderstorms with an approaching front. Cold front crosses region toward sunrise Friday morning as cooler and drier air works southeast behind the front.
High pressure will remain in control of the weather this week, keeping the storm track to our north. Breezy conditions will affect the region today and Friday while a weak disturbance passes by to the north, but temperatures will hold in the 90s across the lower elevations. Dry and even warmer conditions are forecast for the weekend as highs will likely hit 100 across many desert locations. A fast moving upper trof will race through the western CONUS today, staying well to our north and mainly keeping high temperatures in check with the warmer deserts mostly in the lower 90s. northwest/north breezes will develop later tonight and during the day Friday over the western deserts - especially down the lower Colorado River valley - as low level gradients tighten behind the exiting system.
1242 PM EDT Thu Apr 20 2017 Low pressure will track NE across the Central Lakes this evening forcing a strong cold front across the forecast area. as high pressure builds into the Great Lakes.
1240 PM EDT Thu Apr 20 2017 Low pressure will track NE across the Central Lakes this evening forcing a strong cold front across the forecast area. as high pressure builds into the Great Lakes.
Cold front currently just south of Interstate 44 continues to make steady progress southward supported by a broad region of pressure rises. Widespread showers and isolated thunderstorms also continue along and just ahead of the boundary and this trend will likely continue into early afternoon w/ a gradual decrease in coverage as the low level jet weakens.
1202 PM EDT Thu Apr 20 2017 An approaching cold front will bring showers and thunderstorms through tonight, followed by cooler temperatures into the weekend. This will help increase low level instability, and with increasing shear with the approach of a mid level closed low over the Great Lakes will help fire showers and thunderstorms with an approaching front. Cold front crosses region toward sunrise Friday morning as cooler and drier air works southeast behind the front.
635 AM CDT Thu Apr 20 2017 A cold front is making its way across the region with some limited MVFR ceilings that may temporarily affect the KPVW and KLBB terminals this morning. A cold front is making its way across the CWFA early this morning a few hours ahead of schedule from 00Z run projections.
924 AM MST Thu Apr 20 2017 High pressure will remain in control of the weather this week, keeping the storm track to our north. Breezy conditions will affect the region today and Friday while a weak disturbance passes by to the north, but temperatures will hold in the 90s across the lower elevations. Dry and even warmer conditions are forecast for the weekend as highs will likely hit 100 across many desert locations.
933 AM EDT Thu Apr 20 2017 High pressure ridge will remain in control across the region with warm and mainly dry weather continuing. Another quiet night expect with high pressure ridge axis overhead and mostly clear skies and some patchy fog possible inland, but latest SREF showing just 20% chances or less of any significant fog, but will likely be highest impact near the wildfire locations including the West Mims fire in the OKY NWR. E/SE flow at 10-15 knots around the ridge with seas 2-4 feet will become S/SE tonight.
1028 AM EDT Thu Apr 20 2017 High pressure off the coast will move further east today. A cold front will drop into the Mid Atlantic Friday afternoon.
1241 PM EDT Thu Apr 20 2017 Aviation Low pressure will bring a couple waves of shower and thunderstorm activity through the area today. The first round will develop along a warm front before dawn this morning. The second wave will come with the trailing cold front this afternoon.
/ 618 AM CDT Thu Apr 20 2017 Some SHRA/TSRA will be possible across the NRN terminals as an outflow boundary and cold front approach those sites. and a cold front further north. Temps on Fri will also range significantly across the CWA with the cold front dropping further south.
High pressure will then bring lighter winds and warmer days through the weekend. These winds will be stronger due to a passing trough that will coincide with peak mixing due to daytime convection. A weak cold front will move across the area in association with this trough, however temperatures with the new airmass will be so similar to current conditions that the wind shift may be the only indication of frontal passage without instrumentation. As the trough moves eastward a ridge of high pressure will build in over the weekend allowing for warm temperatures and clear skies, along with light winds for the weekend.
1013 AM EDT Thu Apr 20 2017 Ridge of high pressure will remain over the area through early Friday with the remains of a frontal boundary north of the area.