Aikyam-Lab/Synoptic-Bench huggingface dataset:
Upper level troughing extends from Nova Scotia southward through the western Atlantic toward the Bahamas. The major upper level influence for our weather over the coming days will be upper level ridging over the Gulf of Mexico extending northeast over Florida and along the eastern seaboard.
the RAP13 advertises a narrow line convection forming along increasing bndry lyr threat-E convergence along/south of the I-80 corridor associated with a cold front dropping into the cntrl Plains.
A high pressure ridge has shifted east of the region off the east coast. Temperatures have responded in kind, with readings now in the lower to middle 70s at 18Z.
/issued 406 PM CDT Sun Apr 9 2017/ A tightening pressure gradient well ahead of a cold front out over the Plains has resulted in very breezy conditions across much of the region. Additional moisture return overnight will allow clouds to increase in earnest after midnight as warm air advection ramps up ahead of the approaching cold front. Lows are only expected to fall into the lower to mid 60s across the vast majority of the region with a few upper 50s over our far east. A few showers and a stray thunderstorm will also be possible over our far northwest zones north of I-30 as lift increases ahead of the front with associated upper trough pivoting across the middle Red River valley.
Lows tonight will be in the upper 50s with highs on Monday in the low 70s. However, do still expect plenty of elevated clouds and highs should top out a few degrees cooler than today.
846 PM EDT Sun Apr 9 2017 A high pressure system will continue the dry weather through Monday.
707 PM EDT Sun Apr 9 2017 Southerly flow under high pressure aloft will maintain warm and dry weather for the start of the new week. No major alterations were needed for the near term period as warm advection will intensify with the tightening pressure gradient between Plains-to-Western Lakes low pressure and Western Atlantic high.
723 PM EDT Sun Apr 9 2017 High pressure continues to retreat to our southwest with return flow on the back side continuing to strengthen across the Ohio river valley. Thus, the elevated fire danger will continue through the early evening hours with the stronger south winds and the low relative humidity. The dry air will lead to some decent ridge valley splits in our sheltered eastern counties tonight. We may be able to squeeze out a few upper 30s tonight in these locations while staying in the low 50s on the ridges. While they will be slightly higher tomorrow, temperatures will also be warmer. Morgan has some higher ridges susceptible to the stronger winds.
606 PM CDT Sun Apr 9 2017 Westerly winds will diminish around sunset and later this evening they will turn around to the north behind a cold front. A cold front will move across the OK and TX Panhandles later this evening and tonight with north winds in its wake.
Otherwise, high pressure will remain in control with VFR and some gusty southeast winds this afternoon. The surface pressure gradient has also relaxed due to the proximity of the high, and southeast winds today will be less breezy. Meanwhile, temps will be running a few to several degrees above normal for mid March as highs today top out in the upper 70s to lower 80s along the coast to the lower 90s across the Western Ranchlands. The RGV can expect a similar set up for Sunday although highs may be a degree or two warmer as high pressure continues over Deep South Texas.
Cold front has moved just s of MAF with light ne winds. /issued 358 AM CDT Sat Mar 18 2017/ A persistent upper ridge will continue to dominate the weather across the region, as above normal temperatures look to continue through the next 7 days.
Upper ridging over Midland at 00z will slide eastward today and combined with strong cap limit rain chances to the area mainly south of I-10 and west of I-45. Upper ridge continues to creep eastward and should end rain chances tonight for SETX but may see a storm or two develop closer to the Sabine river after midnight.
This ridge axis will push through the area during the day today therefore winds stay relatively light and gradually veer. Tonight a ridge aloft progresses over the plains causing the lee side trough to deepen. This is likely due to the high moisture bias this time of year. With the elevated instability in place the nose of the low level jet should provide some forcing for isolated to scattered storms. There is a chance parcels could be unstable over central KS in the early morning hours although the forcing from the low level jet may not be enough for storm development.
/issued 409 AM EDT Sat Mar 18 2017/ Through this weekend: Latest surface analysis showed a cold front draped southward from Chicago to Texas.
Latest water vapor imagery showing circulation associated with upper low over northern WI shifting slowly southeast. Thermal trof and upper level jet does shift off to the east later today as low level moisture gradually scours out. Passing high pressure ridge axis and light boundary layer winds will allow temperatures to fall quickly later in the night if expected clearing does take place.
Upper level ridging will begin nosing in from the west, allowing for dry and mostly warm weather; central areas will be in the 30s, seasonably chilly.
/issued 246 AM CDT Sat Mar 18 2017/ Wx map shows a cold front across OK/AR/TN this morning generating convection up there.
1034 AM CDT Sat Mar 18 2017 Cold front currently very close to Nashville. Fog and low cigs at area airports early in the TAF period will improve quickly to VFR this morning as a weak cold front sweeps through terminals.
709 AM EDT Sat Mar 18 2017 Current IFR to MVFR conditions will persist for a few more hours before conditions gradually improve around midday behind an exiting midlevel trough. The surface cold front will move through this afternoon, and may bring a few showers to TRI and TYS.
The low clouds briefly moved east of the Fargo and Grand Forks areas around sunrise, but have since backed up to the west in the past hour or so. Without much wind and a fairly weak March sun, there will probably not be much change in the low clouds until early afternoon. Will see much less wind today with cirrus filtered skies as cirrus continues to spill over the top of the ridge and drift over eastern North Dakota. A cold front will work across the area Sunday afternoon with increasing clouds high and mid level clouds.
850-700 mb temps rise around 5 c by aftn so expect highs will be around 10 degrees warmer than Fri across nern CO.
Surface winds may increase later this afternoon as the front retreats to the north as a warm front. Then, these surface winds should decrease after sunset, but can never discount periods of gusty winds overnight with the low level jet in the higher terrain around KABI.
A narrow ridge of high pressure continues over the Florida peninsula providing clear skies and light winds.
Warmer air wl return to the region to close out the weekend.
1021 AM EDT Sat Mar 18 2017 Cold front crosses today. Upper disturbance crosses today into tonight as low pressure intensifies off the east coast.
908 AM EDT Sat Mar 18 2017 High pressure at the surface stretches from near Bermuda, across the Florida Peninsula to the central Gulf of Mexico. A wide swath of alto cumulus is moving westward across the Florida Keys this morning, but has yet to reach the Lower Keys. The trough moving across the Great Lakes will continue to trek eastward through Sunday, and deepen off the Northeast Metroplex Sunday afternoon.
A low pressure system over the ne pac will continue to pump moisture into the two state area today. Temperatures will remain near normal today and several degrees cooler on Sunday.
/Issued 311 AM CDT Sat Mar 18 2017/ Cold front currently located just north of I-40 this morning with a few lingering showers over west-central Arkansas. Warm front will begin to quickly lift back north tonight with the potential for a few elevated showers/thunderstorms across far northeast Oklahoma/northwest Arkansas late tonight into Sunday morning.
High pressure will slide east from the Northern Plains into the Upper Midwest today, slowly increasing the surface pressure gradient across western Kansas by late afternoon and this evening.
/Issued 325 AM EDT Sat Mar 18 2017/ An amplified trough will drop down out of the Great Lakes region helping to push a front draped to the north through the region today. High pressure quickly builds into the area later this afternoon through the remainder of the period. Lows drop into the low/mid 30s across the higher elevations to the low 40s in central GA.
930 AM PDT Sat Mar 18 2017 A high pressure ridge aloft over the Southwest will keep the weather fair and mild through Sunday, except for areas of low clouds and fog within about fifteen miles of the coast nights and mornings.
A warm front is crossing the Columbia Basin currently with light rain showers east of the Tri-Cities. Southerly winds along the Blue Mountain foothills have lifted temperatures into the lower to mid 60s while the rest of the area is in the mid 40s to mid 50s. A cold front is ashore near Puget Sound and the Willamette Valley and will move into the area this afternoon. A low pressure system over the ne pac will continue to pump moisture into the two state area today. Temperatures will remain near normal today and several degrees cooler on Sunday.
Water vapor imagery along with 500mb heights very nicely shows the upper level ridge over the western U. Maliawco A strong ridge of high pressure will spread the warmest temperatures of the season across eastern Montana today with pre- frontal compressional heating on display.
Sunny skies and upper- level ridging will keep highs above normal though today, with the mid-50s to mid-60s expected.
1218 PM EDT Sat Mar 18 2017 Mixed precipitation is expected today and tonight as low pressure crosses the region. Building high pressure should return dry weather later Sunday. Around an inch of snow is expected, with 1-2 inches toward the higher terrain of WV/MD/PA. The ridges could also see a period of freezing drizzle Sunday morning as moisture in the snow growth region dries out, but low level moisture lingers. Clouds should decrease late Sunday as high pressure builds in.
The 200 mb upper level trough should move east of the forecast area and do expect ridging to help end the rain chances later this afternoon. Upper ridging over Midland at 00z will slide eastward today and combined with strong cap limit rain chances to the area mainly south of I-10 and west of I-45. Upper ridge continues to creep eastward and should end rain chances tonight for SETX but may see a storm or two develop closer to the Sabine river after midnight.
High pressure over the Great plains will drift southeast into the Mississippi Valley today. This high will bring cooler temperatures to the region with highs mainly in the mid and upper 50s. The ridge will continue moving east tonight and low level return flow will develop after midnight. Lows tonight will dip down to the low and mid 30s as the high drifts overhead. May actually see the lowest temperatures between 06-09Z with steady temperatures or a little bump before sunrise. There is good agreement between the GFS/NAM/ECMWF that the upper pattern will become more zonal late in the weekend as a east coast trough moves east and the upper ridge currently over the Rockies dampens out as it moves east across the central CONUS.
Mostly sunny skies look to develop over most of the mid state, but another lobe of the upper trough may swing over the far northeastern zones, and bring some cloud cover back to that area this afternoon.
18z model soundings are progging chances of freezing drizzle to accompany chances of snow, as deep moisture seems to be lacking from the 800 mb level upwards, but could be just enough moisture in the low- levels to support the drizzle. A cold front will move across the Northland Sunday night, allowing high pressure to build into the region from Canada. Relatively flat westerly flow will gradually transition to northwest flow by midweek, as an upper level trough carves itself out across the Great Lakes region.
Updated forecast will adjust for observed cloud cover with skies remaining most clear north of the warm front.
1006 AM CDT Sat Mar 18 2017 Skies are clearing across much of the forecast area this morning with temperatures ranging from the lower 50s to mid 60s. The cold front is moving south through north Mississippi at this time. areas of dense fog will continue through sunrise across the northern half of the region until the cold front pushes south. High pressure will settle over the region tonight with clear skies and light winds allowing temperatures to drop into the 30s and 40s. A dry but slightly cooler day can be expected on Sunday with highs ranging from the lower 60s north to around 70 degrees south.
1151 AM EDT Sat Mar 18 2017 Cold front oriented NNE-SSW now moving through western parts of the area. Will not have thunder in the forecast for this afternoon at this time--instability very limited and after about 18z, the surface focus shifts to the Carolinas as a lee trough continues to strengthen. Chattanooga Airport, TN 71 38 62 41 / 0 0 0 0 Knoxville McGhee Tyson Airport, TN 64 36 56 36 / 10 0 0 0 Oak Ridge, TN 65 36 57 38 / 20 0 0 0 Tri Cities Airport, TN 61 33 51 32 / 20 20 10 0.
areas of dense fog will continue through sunrise across the northern half of the region until the cold front pushes south. High pressure will settle over the region tonight with clear skies and light winds allowing temperatures to drop into the 30s and 40s. A dry but slightly cooler day can be expected on Sunday with highs ranging from the lower 60s north to around 70 degrees south.
High pressure will remain in control of the weather across South Florida, allowing for a mostly sunny sky. Temperatures across the region will range from the mid 70s across the east coast metro areas to the lower 80s across interior sections. Tonight will be another dry night as high pressure remains in place. /issued 409 AM EDT Sat Mar 18 2017/ Through this weekend: Latest surface analysis showed a cold front draped southward from Chicago to Texas.
A cold front moves into northeast NE late Sunday afternoon, then through the forecast area Sunday evening.
806 AM EDT Sat Mar 18 2017 Low pressure over the Lower Great Lakes will transfer to the Mid-Atlantic Coast later today.
The tight pressure gradient will translate eastward tonight with gusty winds expected, mainly over the higher terrain areas of the Sisseton Hills. The winds, along with an upper level ridge, will bring very warm temperatures into the CWA on Sunday. A trough crossing the region by the afternoon will certainly mix down the warm temps with highs likely climbing into the 60s and 70s.
Showers are developing ahead of an upper trough tracking through the Pac NW. Will likely not see shower development south and east of Mountain Home today with a marginal threat for thunderstorms over the lower Snake Plain and southwest Idaho mountains. The trough will also push a cold front into the area. Temps will be mild today, 10 to 15 degrees above normal, but Sunday will find us about 5 degrees cooler. Lows Sunday morning will be in the mid 40s in the lower elevations and 30s in the mountains.
This was also ahead of the cold front over central AR, which will continue to drift south, gradually thinning clouds as drier air filters into AR. Warmer air wl return to the region to close out the weekend.
1139 AM EDT Sat Mar 18 2017 A cold front will push through the area this afternoon with showers expected ahead of the front today.
Can not rule out isolated -SHRA/-TSRA nearing just about any terminal later this morning /elected to insert a VCSH at a few terminals/, in association with a weak cold front that just may cause winds to go variable more so at ktxk and keld. /issued 405 AM CDT Sat Mar 18 2017/ Water vapor imagery shows a trough of low pressure moving across the Great Lakes this morning. with the tail end of the associated cold front slowly sagging south across Central Arkansas. This weak cold front will continue to move south today.
Will see much less wind today with cirrus filtered skies as cirrus continues to spill over the top of the ridge and drift over eastern North Dakota. A cold front will work across the area Sunday afternoon with increasing clouds high and mid level clouds.
/Issued 736 AM EDT Sat Mar 18 2017/ An amplified trough will drop down out of the Great Lakes region helping to push a front draped to the north through the region today. High pressure quickly builds into the area later this afternoon through the remainder of the period. Lows drop into the low/mid 30s across the higher elevations to the low 40s in central GA.
Low pressure will intensify southeast of the region Sunday. IR satl imagery showed clouds moving down from Canada across the CWA in response to an upper trof as shown by the 00z UA. The latest run of the NAM and HRRR doing well w/the clouds and show the clouds breaking up by early afternoon as the upper trof slides s of the region. High pressure dominates most of the area on Sunday with a light northeast flow in response to an offshore storm.
Cloudy and cool conditions today will give way to a nice end to the weekend as high pressure brings dry and warmer weather for Sunday.
WAA per downslope Rockies flow will support much warmer conds most places. Lee side trough will shift east overnight tonight, supporting very mild temps, esp in the lee of the Black Hills where downward flow transport will continue to mix down warm air aloft. Main upper trough will shift east across southern Canada, supporting a cold front south into the FA Sunday, in a stalling fashion. Northern areas will see much cooler temps, while scentral SD will see highs in the upper 70s.
Quiet weather will be in store for Sunday with upper ridge over South Texas.
and GA this morning will continue to shift southward and become less organized over the central and lower parts of MS and AL late this morning through this afternoon as the main upper trof over the Great Lakes region this morning shifts south and east over the ne conus and mid Atlantic region today and tonight. With limited instability in the lower levels combined with the better forcing shifting east of the region by afternoon the threat for though wetbulbs are well below 10. starting out as mostly cloudy skies generally north of the highway 84 early today shifting south to the coast by late this afternoon. Lows tonight will fall to the mid to upper 40s for most areas generally north of the I-10 corridor and the lower to middle 50s further south to the coast.
This will bring a mix of snow, light rain and freezing drizzle to northeast Wisconsin until it tracks east of the area in the next few hours. After the PV anomaly tracks east and precipitation ends, Lake Effect precipitation will continue through the morning hours before ending around noon as winds become light and drier, warmer air advects in from the west ending the Lake Effect component. Once this system tracks east a dry period will exist across the western Great Lakes tonight into most of Sunday as a ridge of high pressure tracks through the area. Temperatures this weekend will warm as highs Today are expected to top out from the lower to middle 30s across the north, with lower 40s across the south.
Clouds will increase over se Ga this afternoon as a cold front approaches. Ceilings around 6kft possible this evening with cold frontal passage.
Picture perfect Chamber of Commerce type day today with ridging aloft and temperatures climbing into the upper 60s to near 80 degrees at lower elevations. Low temperatures above freezing at lower elevations. Flow aloft becomes westerly and strengthens, inducing even more downslope warming east of the mountains, with high temperatures near or slightly warmer than Saturday highs. A cold front sags southward across our eastern plains, perhaps up to the Laramie Range, with a few showers possible after midnight north of a Douglas to Alliance line. Not as mild as Saturday night in the cooler airmass.
117 PM EST Wed Feb 15 2017 Low pressure will move off the coast tonight as high pressure then builds back into the region.
1140 AM PST Wed Feb 15 2017 A wet and mild storm system will bring a threat for freezing rain to Central Washington and rain in Idaho and Eastern Washington.
High pressure will move across our area Thursday ending any lingering snow showers early Thursday.
A wintry mix of precip has moved into parts of southeast Oregon, with Burns reporting freezing rain and sleet. Dense fog continues in the Lower Treasure Valley and western portions of the Upper Treasure Valley this morning. Mostly VFR except in the Lower Treasure Valley where IFR conditions still exist due to fog. Areas of Freezing Rain possible this morning in and around KBNO. Freezing rain possible Thursday AM in and around KONO and northern Malheur County. The cold air may remain trapped in lower valleys from Burns to Ontario, and into the Upper Treasure Valley through Thursday morning for a chance of light freezing rain. Snowfall accumulations will be limited to the higher elevations above 6000 feet.
This quiet/dry weather will be transitioning to a more active/wet one by the end of the week as a series of upper trofs/lows develop and move across from the W.
239 PM CST Wed Feb 15 2017 High pressure will continue to dominate Central Illinois and much of the Midwest through the overnight hours. Very little in the way of cloud cover, and light variable winds under the ridge axis. Overnight, the ridge slips eastward and winds become more southerly. Morning upper air and moisture channel imagery shows main upper trough from eastern Great Lakes into KY/TN.
A cold front will push across the Florida peninsula late today and tonight. High pressure will build over the forecast area in the wake of the cold front tonight and Thursday with winds veering northwest and gradually subsiding. Drier cooler air will advect over the area with temperatures dropping slightly below climatic normals for Thursday with highs in the upper 60s north to the mid 70s south. At the start of the medium range period, broad upper ridging will have become established over the Gulf of Mexico, extending into much of the southeastern U. Further west, a cutoff upper low pressure system will slowly meander over south Texas and the Southern Plains region. At the surface, sprawling high pressure will extend across the Gulf Coast states, setting the stage for pleasant weather ahead of the weekend.
1101 AM CST Wed Feb 15 2017 Early morning analysis showed a weak cold front moving south across the area. Satellite imagery is showing broken-overcast cirrus over the southeast half of the CWA which is occurring on the north side of the upper low currently near the Bootheel. These upper clouds are shifting southeastward as the upper low moves east.
1132 AM CST Wed Feb 15 2017 Forecast area currently between departing mid-level trough over the Great Lakes and ridge of high pressure building in from the Western CONUS. Mid-level ridge and warming Plains air begins to move into the area Thursday with highs expected to to top off in the 30 to middle 40s.
Pleasant conditions will continue through the remainder of the work week as an upper ridge builds into the forecast area. Meanwhile, high pressure will develop along the Gulf Coast and southerly flow will return to the area by Thursday afternoon.
103 PM MST Wed Feb 15 2017 Large scale ridging is in place across the Intermountain West extending eastward into the Central High Plains. At the surface lee troughing extending across eastern Colorado, with weak SW gradient extending over our CWA.
Some sheared energy rotating around the Northeast US upper low will help to bring some high/mid clouds especially north late tonight into thursday, but no precipitation is anticipated for the short term period.
The upper-level trough will remain over the Southeast tonight as a cold front exits the southeast Big Bend to the southeast.