Aikyam-Lab/Synoptic-Bench huggingface dataset:
255 AM MDT Sat May 20 2017 Latest analysis shows the deep closed low is currently centered over swrn Nebraska with bands of precipitation rotating around the low and into parts of western and central South Dakota. The low pressure system will move slowly eastward today, reaching northeastern Nebraska by early evening. The rain will gradually shift eastward today as the low moves away from the forecast area.
Fairly dry air in the low-level combined with low freezing levels means a few storms could briefly produce gusty winds and rain mixed with graupel. Given the cooler temperatures and the low rainfall totals in the forecast, we are not anticipating any river issues over the next few days.
1203 AM CDT Sat May 20 2017 The upper level low continues to slowly make its way toward our area, bringing us the potential for a couple rounds of storms. A cold front will move through behind the convection, cooling temperatures into the 60s and 70s for the rest of the weekend.
255 AM CDT Sat May 20 2017 Low level moisture has been scoured out by the cold front.
a cold front is currently shifting winds from the north which will eventually veer around from the east and southeast by the end of the TAF period. Sensible wx Sat AM will include brief windy conditions across the PB and much cooler conditions. NE winds thru the day and some clouds will keep high temps below normal as well, any precip chances will be confined to the Lower Trans Pecos. The chance for precip will increase Sun AM-PM as return se low level flow develops ahead of damping shrtwv trof. Noticeably warmer/drier Thur/Fri. Mostly low end RF wx across the warned area as Carlsbad has just mixed out and lowest RHs in the GDP Mtns are confined to the lowest elevations.
This will be ahead of a cold front pushing into the state from the west.
330 AM CDT Sat May 20 2017 The mid/upper level low will lift slowly northeast across Nebraska today and into the Upper Midwest by late tonight. A brisk and cooler northwest surface flow will prevail in the systems wake today with any lingering showers exiting the area during the morning. Clouds will be slow to scour in the moist cyclonic flow around the departing surface/low level cyclone with even limited heating tending to develop some diurnal stratocu in areas that partially clear. The weekend will finish dry and warmer with highs closer to mid- May climo.
115 AM EDT Sat May 20 2017 High pressure building into the North Country will provide sunny skies and seasonal temperatures through the weekend.
A strong low pressure system continues to slowly lift toward the Great Lakes over the next 48 hours, as a broad amplified high pressure ridge edges in from the west. We'll see one more weak impulse carve down the back side of the new mean trough position downstream that will help slow our heating trend down about 12 hours or so.
450 AM EDT Sat May 20 2017 High pressure builds this morning, then moves east late today and tonight. As the ridge builds to the west and steering flow turns toward the SE, any activity passes south and east by afternoon. Gusty NE winds turn to the E/SE and lighten as the high builds from the north. Cool temps tonight, ranging from around 40 in the normally cooler locations, to around 50, will warm into the 60s Sunday, still below normal. By Sunday night, the ridge axis moves east, and deep SW flow, and WAA moves in.
636 AM EDT Sat May 20 2017 High pressure will maintain dry weather and above normal temperatures again today. Shower and thunderstorm chances will increase by Sunday as moisture builds ahead of an approaching cold front.
341 AM CDT Sat May 20 2017 As of 08z, a closed upper level low centered across south central Nebraska. At the surface, a low pressure center was across northeast Kansas with a cold front oriented north to south from eastern Kansas into northern Texas. As the low and cold front push east of the area, expect precipitation to come to an end for much of the by dawn. High pressure will build across the central plains late this evening into the overnight. Cloud cover is expected to clear late this evening allowing overnight lows to dip into the low to middle 40s. SUNDAY, AN INTENSE UPPER LOW WILL CONTINUE TO LIFT NORTHEAST ACROSS THE UPPER MIDWEST. WHILE A SHORTER WAVE Length UPPER TROUGH DIGS SOUTHEAST ACROSS THE CENTRAL ROCKIES.
327 AM EDT Sat May 20 2017 Rain chances will increase Sunday with the approach of a cold front. Otherwise, upper ridging is underway in response to deepening plains low pressure. Given the strengthening ridge, no changes were needed to the temperature forecast about 5 degrees over the averages. Rain chances are expected to escalate into Sunday as Great Plains low pressure digs toward the Upper Mississippi Valley and shunts a cold front across the midwest and over the Upper Ohio.
551 AM EDT Sat May 20 2017 Cool high pressure builds across the area today and becomes centered over the area tonight and early Sunday. High pressure shifts east on Sunday.
255 AM CDT Sat May 20 2017 Showers and thunderstorms beginning to wind down across eastern Oklahoma early this morning as the responsible upper level low moves out of the Rockies and into the Plains. High pressure is expected to prevail on Sunday and will result in a chilly start to the day with lows ranging from the mid 40s to mid 50s.
513 AM EDT Sat May 20 2017 Rain chances will increase Sunday with the approach of a cold front. Otherwise, upper ridging is underway in response to deepening plains low pressure. Given the strengthening ridge, no changes were needed to the temperature forecast about 5 degrees over the averages. Rain chances are expected to escalate into Sunday as Great Plains low pressure digs toward the Upper Mississippi Valley and shunts a cold front across the midwest and over the Upper Ohio.
654 AM EDT Sat May 20 2017 Cold front draped over Northern West Virginia is slowly drifting south this morning.
358 AM EDT Sat May 20 2017 High pressure will shift further offshore today.
For the rest of today, expect multiple rounds of storms as a cold front approaches the area. While shear profiles aren't the greatest, they are sufficient for multicell clusters and will be maximized this evening just ahead of the cold front. The post-frontal cooler airmass will begin to enter the region early Sun limiting highs to the 70s.
250 AM EDT Sat May 20 2017 High pressure builds in through Saturday night, moving offshore on Sunday. Updated temperatures and dew points for hourly trends with the cooler and drier air moving into the area. High pressure will be over the region Saturday and Saturday night with a cooler and drier air mass across the region. Upper ridge axis passes to the east at the onset of the period with a broad upper trough over the mid section of the country translating slowly east through the week.
545 AM CDT Sat May 20 2017 The short term concerns are evolution of the rain shield over the area this morning and possible development of convection over the eastern cwa into tonight as the upper trough swings through. Surge of moisture ahead of central CONUS upper trough now lifting into southern MN.
1115 PM MDT Fri May 19 2017 Deep closed low over the Rockies continues to slowly shift NE, ejecting small impulses in the processes. However, clouds will hang on most if not all areas and will limit temp falls below freezing on most if not all of the plains.
Large upper low currently over Colorado will shift into the central Plains by early Saturday, then lift northeast to near the Iowa/Minnesota border by mid evening. The GFS brings CAPE values over 1200 J/kg over all of the forecast area by early afternoon, while the NAM limits the higher values mainly across eastern Illinois. By early evening, the trailing cold front will be pushing into the western CWA, and should largely be out of the forecast area by sunrise Sunday.
132 AM EDT Sat May 20 2017 High pressure will maintain dry weather and above normal temperatures again today. Shower and thunderstorm chances will increase by late weekend as moisture builds ahead of an approaching cold front.
637 AM EDT Sat May 20 2017 Low pressure over the southern Plains will move slowly northeast into the upper Great Lakes this weekend causing showers and thunderstorms at times across our area through Sunday morning, with best chances late today through tonight.
638 AM EDT Sat May 20 2017 Aviation A low pressure system developing in Kansas will track northeast through tonight. A cold front associated with this storm will push eastward through Lower Michigan Sunday morning.
400 AM CDT Sat May 20 2017 The upper level low will track across Nebraska today and into northwest Iowa by tonight.
Meanwhile, the upper level ridge axis extends N from Florida across Michigan.
90/I-10 as the actual cold front moves into the area.
A warm and muggy evening in progress across the Tennessee Valley with temperatures still in the lower to middle 80s in many areas. The synoptic scale warm front was analyzed well to our north this evening and it is hard to see any definitive trigger for overnight convection. The forecast becomes progressively wetter tomorrow afternoon as the base of the Plains upper low kicks eastward, instigating more widespread lift and spreading more moisture into the region as well. PoPs in the forecast will reflect blended guidance, and the highest rain chances will be with the front Sunday afternoon/evening.
a cold front will move into the state from the NW. with cooler and more stable conditions expected for the rest of Sun.
506 AM EDT Sat May 20 2017 Low pressure over the southern Plains will move slowly northeast into the upper Great Lakes this weekend causing showers and thunderstorms at times across our area through Sunday morning, with best chances late today through tonight.
510 AM CDT Sat May 20 2017 An upper level low swinging down into Texas this am is supporting a line of storms ahead of a cold front this line is approaching from the west.
345 AM CDT Sat May 20 2017 A cold front will continue to move slowly southeast across the region this morning and exit the forecast area this afternoon. A broken line of showers and thunderstorms along and ahead of the cold front will exit the region this morning with only some lingering post frontal showers and a few storms across the southeast zones this afternoon. The severe weather potential will decrease significantly through the day as the upper low lifts northward across the Central Plains and dry/subsident air filters in from the north. Today will be noticeably drier and cooler across all but the southeast zones. The cold front is progged to remain south of the forecast area tonight.
403 AM EDT Sat May 20 2017 Cold front draped over Northern West Virginia is slowly drifting south this morning.
330 AM CDT Sat May 20 2017 (Today and Tonight) Elevated Thunderstorms continue to develop behind the cold front early this morning due to lift associated with an upper level trough extending from a low in northeastern CO/southwest NE south into west Texas. However, a broad weak frontal zone will set up to our south as the cold front stalls, allowing for additional scattered showers and thunderstorms to develop today through tonight mainly south of a Barnhart to Brownwood line, with the best chances along and south of the I-10 corridor. We will see cooler and drier conditions behind the cold front today and tonight with highs today in the mid 70s to near 80, and lows tonight mainly in the mid 50s to around 60 degrees.
Expectations of lowering and thickening of clouds across the James River Valley late tonight as the upper low moves into South Dakota, with increasing chances for showers during the day Saturday. The latest water vapor imagery loop shows an upper low over central Colorado which is forecast to move northeast through the short term period. This places the low into southeast South Dakota Saturday afternoon, then across Minnesota into western Great Lakes Sunday evening. For Saturday, partly cloudy/warmer west with more clouds/cooler south central. Scattered/numerous rain showers James River Valley which will be closest to the upper low. Highs in the low to mid 60s west and north Saturday, with 50s elsewhere.
Otherwise, high pressure over eastern Canada will provide dry weather through Sunday morning.
400 AM EDT Sat May 20 2017 Cold front draped over Northern West Virginia is slowly drifting south this morning.
Mid/Upper level ridging, although not particularly strong, will still reside over the peninsula, while surface ridging extends from the western Atlantic to north Florida/Southern GA. And, low level synoptic flow from the east underneath weak ridging aloft to reduce the shear is a good setup for our pulse convection.
The models are in reasonably good agreement in dragging the cold front through our region late Saturday night into Sunday morning. The primary upper-level system will be well north of the area and we will not have the synoptic cold front in play yet.
Models prog the low level convergence to shift farther S and E Sunday, thus shifting the higher pops closer to the coast.
321 AM EDT Sat May 20 2017 Cool high pressure builds across the area today and becomes centered over the area tonight and early Sunday. High pressure shifts east on Sunday.
413 AM EDT Sat May 20 2017 High pressure in Canada will slowly build into the area through the weekend.
Broad area of low pressure will continue to exit the Four Corners region with high pressure building in from the west.
Moore An upper level low will continue tracking slowly east-northeast acrs CO this evening and is forecast to move into south central NE by 12Z Sat. As temps cool this evening, some of the lower elevation showers may change over to snow, but little if any accumulation is expected. By late night, as the low moves east of the area, pcpn will end in most if not all locations, and clouds will decrease from west to east. Temps will be warmer on Sat but will still generally be about 10 degrees below average.
A warming trend will continue into the weekend as high pressure builds along the West Coast.
The trough will move south today on the eastern flank of an upper level ridge amplifying over the coast. There is only a slight chance of thunderstorms over the higher terrain south of the Snake River Valley, and northern portions of Harney and Malheur Counties. Temperatures will be near normal today, and a few degrees above normal on Sunday as the upper level ridge builds inland.
353 AM EDT Sat May 20 2017 High pressure builds this morning, then moves east late today and tonight. As the ridge builds to the west and steering flow turns toward the SE, any activity passes south and east by afternoon. Gusty NE winds turn to the E/SE and lighten as the high builds from the north. Cool temps tonight, ranging from around 40 in the normally cooler locations, to around 50, will warm into the 60s Sunday, still below normal. By Sunday night, the ridge axis moves east, and deep SW flow, and WAA moves in.
Storms should continue to gradually translate east into an environment that remains conducive to severe weather, with sfc dew points in the lower 70s southeast of a boundary extending from Franklin Co. However with front and upper trough still west of the area, and ongoing convection, will maintain flash flood watch and add Pushmataha/Choctaw counties to the watch. Cold front may make it to our western zones by Saturday morning, and have lowered min temps a bit for this possibility.
540 AM CDT Sat May 20 2017 The upper level low will track across Nebraska today and into northwest Iowa by tonight.
Forecast is on track for tonight with lows in the lower 70s. With the same PWAT plume expected to stick around on Sunday, expect another active afternoon of seabreeze storms further complicated by convection associated with an approaching cold front. Showers and storms will likely linger through the night as storms generated along the cold front move into the Tri-State region.
Strong Pacific upper level ridge has built over NorCal with dry and warm conditions. Ridge will remain in place over the region through the weekend with temperatures warming further through the 90's and approaching 100 degrees in some spots. Weak disturbance dropping southeast over ridge may produce an isolated storm or two over the Sierra south of highway 50 Sunday afternoon.
333 AM EDT Sat May 20 2017 Early this Saturday morning, a ridge of high pressure remains in place over the western Atlantic into the northeastern Gulf, with an area of low pressure over the southern Plains states. Near term (today-tonight): In addition to the SAL, the 20/00Z Nassau sounding, GOES-16 WV data, blended TPW imagery, and available surface observations all indicate slightly drier air in the low-mid levels over the Bahamas moving toward the region.
358 AM EDT Sat May 20 2017 A cold front has stalled across southern Ohio as high pressure slowly moves eastward across southeastern Canada into Sunday. The frontal boundary will move back to the north as a warm front tonight and should move north of Lake Erie by Sunday afternoon. As low pressure moves into Ontario it will push a cold front across the region Sunday evening into Sunday night.
514 AM EDT Sat May 20 2017 Cooler and drier air will settle in for the weekend.
250 AM EDT Sat May 20 2017 Cooler and drier air will settle in for the weekend.
With the lower chances at TLH and ECP, left out SHRA/TSRA for now and only included convection for VLD, ABY and DHN. High temperatures will be a few degrees cooler today with highs mainly in the upper 80s and while this is more normal for this time of year, it will still feel hot and muggy.
337 AM CDT Sat May 20 2017 Cold front currently heading into the Big Bend with gusty northerly winds in its wake. Front will continue to sag south into Mexico today with much cooler temperatures expected in its wake. Guidance is indicating some low level moisture and instability will persist through tonight across the lower Trans Pecos and portions of the Big Bend. This moisture will combine with an upper level disturbance and the left exit region of the subtropical jet to produce a slight chance to a chance of showers and thunderstorms from the southeast Permian Basin south to the lower Trans Pecos and Big Bend through tonight. Large scale lift may also be enhanced by the right exit region of a northern stream trough.
623 AM EDT Sat May 20 2017 High pressure builds this morning, then moves east late today and tonight. As the ridge builds to the west and steering flow turns toward the SE, any activity passes south and east by afternoon. Gusty NE winds turn to the E/SE and lighten as the high builds from the north. Cool temps tonight, ranging from around 40 in the normally cooler locations, to around 50, will warm into the 60s Sunday, still below normal. By Sunday night, the ridge axis moves east, and deep SW flow, and WAA moves in.
337 AM EDT Sat May 20 2017 Cool high pressure builds across the area today and becomes centered over the area tonight and early Sunday. High pressure shifts east on Sunday.
A cold front over western Oklahoma will bring a wind shift to all TAF sites by 6Z. Other widely scattered showers and a few storms are developing mainly north of a cold front in northwest Oklahoma. Overall the risk of strong to severe storms will continue into the evening, perhaps overnight, before a cold front sweeps across southern Oklahoma by early Saturday morning.
615 AM EDT Sat May 20 2017 High pressure in Canada will slowly build into the area through the weekend.
149 AM EDT Fri Jul 14 2017 Thunderstorm chances will continue this morning as a cold front slowly moves south into the Ohio Valley.
249 AM EDT Fri Jul 14 2017 A cold front which will pass through during the day and evening today. Sfc cold front nears the nrn tier before sunrise, but takes quite a bit of time to cross the CWA. High pressure is forecast to dominate the region on Saturday with an expected break from pcpn and hier humidities of this week.
236 AM EDT Fri Jul 14 2017 Scattered showers and thunderstorms will continue this morning as a cold front slowly moves south into the Ohio Valley.
126 AM EDT Fri Jul 14 2017 The threat for showers and storms will continue today with the slow passage of a cold front. Cooler and more comfortable for the weekend. Northwest flow aloft and building high pressure will provide a drier and more comfortable weekend. An approaching trough will return low shower/storm chances for Mon before a large upper high drifts E from the Plains and Midwest. Scattered showers and possibly a few storms will be possible this morning as a cold front crosses this morning.
350 AM CDT Fri Jul 14 2017 Wx map shows similar conditions the last few days, the surface Bermuda high ridging westward across the Gulf, providing a light south to southeast flow across the region. High pressure aloft covers most of the Midwest into the Gulf states region. Chances 40-50% across SE TX/SW LA, going a little higher 50-60% for C and SC LA with increased moisture with the approaching tropical wave and slight breakdown of the ridge aloft along the Gulf coast.
A cold front across central Indiana early this morning will exit the area today, taking chances for rain with it. /Today/ A cold front was across central Indiana this morning with an upper trough approaching the area. Some models generate a few showers this afternoon across northern Indiana with the upper trough still around.
Daytime temperatures will climb into the lower 90s with some middle 90s possible across the interior. It will remain hot and muggy with temps topping out in the low/mid 90s with heat indices in the 100-104 range. A blocking upper air pattern will continue into the medium to long range period as stout high pressure remains centered over the central and western CONUS, with weak troughing across the Great Lakes and New England. Along the southern periphery of broad cyclonic flow, modest subtropical ridging will extend into the Gulf of Mexico and southeast states. Subtle shifts in the ridge axis will be the main driver of daily rain chances.
341 AM CDT Fri Jul 14 2017 A large upper-level ridge resides over the desert southwest into the central Rockies this morning. However, the monsoonal moisture plume extending northeast out of nrn MX and a slow-moving front in the central plains have produced a series of convective systems that have weakened the ridge to some extent over eastern CO and KS. Temperatures today should be very similar to yesterday - down just slightly from previous days with highs in the lower 90s on the Caprock and middle 90s in the Rolling Plains.
331 AM EDT Fri Jul 14 2017 More showers and storms in the humid airmass expected ahead of a cold front passing tonight. High pressure will build in for a drier weekend.
614 AM EDT Fri Jul 14 2017 A series of weak lows will track along a stalled front over southern New England through early Saturday, as cool high pressure remains to our northeast.
Tonight Through Saturday The upper ridge over the area will weaken somewhat through the short term period. This is going to allow a cold front in central Missouri to move south and enter north Arkansas Saturday morning. With more cloud cover, temperatures will be a bit cooler.
252 AM EDT Fri Jul 14 2017 A series of weak lows will track along a stalled front over southern New England through early Saturday, as cool high pressure remains to our northeast.
334 AM CDT Fri Jul 14 2017 The synoptic cold front has essentially stalled across northwestern OK early this morning, with an outflow boundary extending from near Enid to Stillwater.
630 AM EDT Fri Jul 14 2017 More showers and storms in the humid airmass expected ahead of a cold front passing tonight. High pressure will build in for a drier weekend.
430 AM CDT Fri Jul 14 2017 A closed upper low will remain fairly stationary across the central Rockies and central Plains states through the weekend. This closed upper low will be poised between two areas of upper high pressure regions: one just to the east of the closed upper low and one just to the west of it.
More cloud cover lies to the north over the Ohio Valley where areas of thunderstorms are still occurring ahead of a weak cold front.
600 AM CDT Fri Jul 14 2017 A pattern change will begin to take place today as ridging aloft will begin to amplify from the Desert SW region.