Aikyam-Lab/Synoptic-Bench huggingface dataset:
317 PM EDT Fri May 23 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s.
Widely scattered showers have already developed across southeast Oregon ahead of the trough, which is expected to shift into southwest Idaho by late morning. Surface winds: W-NW 5-10 kt with gusts up to 20 kt in the Lower Snake Plain.
Today, a low amplitude mid-level ridge extended from Texas northward into central Nebraska.
333 PM EDT Fri May 23 2025 Lingering bands of rain gradually weaken through tonight, but showers will remain into Saturday as low pressure moves through the Gulf of Maine.
135 PM EDT Fri May 23 2025 High pressure lingers over the area thru Saturday keeping conditions mostly dry.
300 PM EDT Fri May 23 2025 Low pressure continues to move across New England tonight. High pressure centered near the Midwest will gradually extend southeastward and eventually into our area late in the holiday weekend.
225 PM CDT Fri May 23 2025 Tonight through Saturday: Another quiet evening is expected as the ridge moves eastward.
242 PM EDT Fri May 23 2025 An upper level low, increasing in forward speed, will carry the widespread rain and drizzle eastward tonight, giving way to more intermittent showers over Western New York tonight, and then region wide Saturday.
349 PM EDT Fri May 23 2025 Behind a cold front, cool and dry high pressure builds in today from the west, and will remain over the area for the first half of the weekend.
149 PM MDT Fri May 23 2025 KEY MESSAGES: - High pressure through the weekend will bring mostly fair weather - Increased instability on Memorial Day will result in chances for afternoon/evening thunderstorms Satellite imagery this afternoon is indicating westerly flow aloft over the Northern Rockies and a well-formed low pressure circulation off the coast of Canada. High pressure will begin to build over the Northern Rockies tonight as the Pacific low digs south.
- A slow moving upper low will bring cloudy skies, cool highs in the 50s to near 60 and widespread precipitation across much of western and north central Nebraska for Memorial Day weekend.
Temperatures will fall several degrees on Saturday before a rebound occurs as ridging builds into the region during the week.
Weak pressure pattern in place along with a lingering dry airmass (PWATs around an inch or less) and mostly clear skies will support another night with near normal low temps in the lower/middle 60s inland and upper 60s/near 70F along the Atlantic Coast.
224 PM CDT Fri May 23 2025 Tonight through Saturday: Another quiet evening is expected as the ridge moves eastward.
252 PM EDT Fri May 23 2025 Cooler and dry high pressure will remain across the area through Saturday.
(This evening through Saturday night) Upper troughing over the Great Lakes this afternoon, with ridging extending from West Texas northward along the lee side of the Rockies. Temperatures away from localized cooling due to thunderstorms were generally in the upper 80s to around 90 with dew points in the lower and middle 70s.
The severe threat will be limited somewhat by a cooler environment.
1231 PM CDT Fri May 23 2025 (Today through Saturday) Key Messages: - Moderate to Extreme Risk of Heat-Related Impacts Over Portions of the Brush Country and Coastal Plains After a morning with patchy fog across the Coastal Plains, the mid to upper level ridge will build into the area today. Highs will climb into the mid 90s to the low 100s today. Please do not be fooled by the lack of the Heat Advisory product--temperatures will be quite warm and heat index values will make things feel even warmer.
426 PM EDT Fri May 23 2025 A low pressure system is currently located off the coast of Maine and is expected to gradually weaken and move east across the Maritimes through the weekend.
248 PM EDT Fri May 23 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s.
- Mainly dry and cooler than normal through Memorial Day.
155 PM EDT Fri May 23 2025 Cool and dry high pressure will build from central Canada over the Mid Atlantic region into the weekend.
313 PM EDT Fri May 23 2025 Low pressure will continue up the New England coast through tonight.
(Tonight through Saturday night) Key Messages: - Moderate to Extreme Risk of Heat-Related Impacts (level 2/4 out of 4) A mid to upper level ridge will begin to move into the region tonight and hang around through early this weekend. As the ridge moves across the region, PWAT values are expected to decrease from 1. Apart from the drier air with the increased subsidence, temperatures will also be about 5 degrees warmer than today.
308 PM CDT Fri May 23 2025 - Scattered showers and a few storms continue this afternoon and evening (60-80% chance) with the highest chances across northeast Nebraska and west central Iowa. These showers and storms will continue to fester throughout the afternoon and early evening hours with the highest PoPs (60-80%) primarily over northeast Nebraska into west central Iowa. Otherwise, highs today will be in the low to mid 60s with winds from the east southeast at 5 to 10 mph. For tonight into early Saturday morning, could still see some light showers (15-40% PoPs) with the highest chances over northeast Nebraska as some lift lingers. PoPs peak at 60-70% by the late evening hours with the highest chances mainly across western portions of our forecast area.
- Cold front Saturday morning will provide SW KS with an unseasonably cool Memorial Day weekend, with more clouds than sun, northeast winds, occasional rain, and afternoon temperatures much below late May normals. Short range ensembles agree this lee cyclone will continue to deepen daytime Friday, resulting in a slight uptick in winds and a stubborn stratus deck across much of the area through at least midday. This will support a wide range in afternoon temperatures with highs in the low 90s southwest to the upper 60s/near 70 northeast. Breezy northeast winds, overcast skies, and well-below normal temperatures are likely, with afternoon highs ranging from the low 60s north to the low 70s south. With the cold front pushing any/all instability southward into TX/OK, convection appears unlikely, with all CAMs suggesting scattered light rain showers will be prominent.
A pleasant Friday across northern and central Georgia, especially for late May standards, thanks to a cool and dry frontal boundary pushing through the area and high pressure sitting over the Tennessee Valley. High temperatures will range significantly across the area, with far northern GA only reaching the low to mid 70s under mostly cloudy skies, and central GA reaching the mid to upper 80s under mostly clear skies.
The first is that although air temperatures will be warm, ocean temperatures are still chilly in the low to mid 50s. (Today and tonight) Subtle upper level trough set to move through today amid a robust NW flow regime, which has been keeping us rather breezy through this week. Cooler temps as well today just a few degrees below seasonal normals across the region.
1237 PM CDT Fri May 23 2025 (Today through Saturday Night) The heat and humidity continues today and tomorrow: high temperatures in the low to mid 90s (cooler at the coast), low temperatures in the mid to upper 70s (warmer at the coast). Ridging builds aloft today into tomorrow likely limiting any precipitation, but wouldn't be totally surprised if an isolated shower develops during peak heating hours near the coast.
858 AM PDT Fri May 23 2025 Cooler with a deepening marine layer into the weekend with night and morning coastal low clouds spreading farther into the valleys with slow or limited afternoon clearing near the coast.
- Cold front Saturday morning will provide SW KS with an unseasonably cool Memorial Day weekend, with more clouds than sun, northeast winds, occasional rain, and afternoon temperatures much below late May normals. Widespread elevated southeast winds and related moisture advection was supporting dewpoints into the lower 60s across western zones. Cold front, augmented/assisted by any convective outflow, will progress southward across SW KS tonight, easily reaching the KS/OK border by sunrise Saturday. Saturday's temperatures follow the coolest guidance, struggling into the lower 60s, and even that may be too warm.
753 PM EDT Fri May 23 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s.
553 PM CDT Fri May 23 2025 - Scattered showers and a few storms continue this afternoon and evening (60-80% chance) with the highest chances across northeast Nebraska and west central Iowa. These showers and storms will continue to fester throughout the afternoon and early evening hours with the highest PoPs (60-80%) primarily over northeast Nebraska into west central Iowa. Otherwise, highs today will be in the low to mid 60s with winds from the east southeast at 5 to 10 mph. For tonight into early Saturday morning, could still see some light showers (15-40% PoPs) with the highest chances over northeast Nebraska as some lift lingers. PoPs peak at 60-70% by the late evening hours with the highest chances mainly across western portions of our forecast area.
614 PM EDT Fri May 23 2025 A low pressure system is currently located off the coast of Maine and is expected to gradually weaken and move east across the Maritimes through the weekend.
730 PM EDT Fri May 23 2025 A low pressure system is currently located off the coast of Maine and is expected to gradually weaken and move east across the Maritimes through the weekend.
1010 PM EDT Fri May 23 2025 An upper level low, increasing in forward speed, will carry the widespread rain and drizzle eastward, giving way to more intermittent showers over Western New York overnight, and then region wide Saturday.
It has been a beautiful and cooler-than-normal day out there for late May. A warm front is analyzed stretching from the ArkLaTex to the Great Plains and is gradually lifting northeast this evening. Soundings show convection will likely be elevated with the warm front entering into the area, but if any surface-based CAPE is able to develop, a few rumbles of thunder will be possible. Outside of rain chances, lows tonight will still be on the cooler side with upper 40s to mid 50s. (Rest of today through Saturday) Today will be one of the last sunny days for a few days, so get out and enjoy it! Probability for showers and thunderstorms increases tomorrow, with the arrival of a warm front from the south.
638 PM CDT Fri May 23 2025 (Tonight through Saturday night) Key Messages: - Moderate to Extreme Risk of Heat-Related Impacts (level 2/4 out of 4) A mid to upper level ridge will begin to move into the region tonight and hang around through early this weekend. As the ridge moves across the region, PWAT values are expected to decrease from 1. Apart from the drier air with the increased subsidence, temperatures will also be about 5 degrees warmer than today.
923 PM EDT Fri May 23 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s.
736 PM EDT Fri May 23 2025 An upper level low, increasing in forward speed, will carry the widespread rain and drizzle eastward tonight, giving way to more intermittent showers over Western New York tonight, and then region wide Saturday.
1005 PM EDT Fri May 23 2025 A low pressure system is currently located off the coast of Maine and is expected to gradually weaken and move east across the Maritimes through the weekend.
732 PM EDT Fri May 23 2025 Cooler and dry high pressure will remain across the area through Saturday.
638 PM CDT Fri May 23 2025 Tonight through Saturday: Another quiet evening is expected as the ridge moves eastward.
Some HiRes models continue to show isolated to scattered sprinkles with the lower clouds that arrive tonight.
Dew points range from the middle and upper 40s in southern middle TN to the lower 60s in Cullman County.
852 PM EDT Fri May 23 2025 Low pressure will continue up the New England coast through tonight.
924 PM EDT Fri May 23 2025 Low pressure continues to move across New England tonight. High pressure centered near the Midwest will gradually extend southeastward and eventually into our area late in the holiday weekend.
550 PM CDT Fri May 23 2025 (This evening through Saturday night) Upper troughing over the Great Lakes this afternoon, with ridging extending from West Texas northward along the lee side of the Rockies. Temperatures away from localized cooling due to thunderstorms were generally in the upper 80s to around 90 with dew points in the lower and middle 70s.
631 PM EDT Fri May 23 2025 Lingering bands of rain gradually weaken through tonight, but showers will remain into Saturday as low pressure moves through the Gulf of Maine.
/EC/ Tonight through Saturday: Another quiet evening is expected as the ridge moves eastward.
Temperatures will fall several degrees on Saturday before a rebound occurs as ridging builds into the region during the week. Outside of the northwestern portions of our forecast area, weather will be relatively benign with temperatures topping out a few degrees cooler than today.
639 PM EDT Fri May 23 2025 Upper level low will continue to spin overhead with cool and unsettled weather through Saturday. same story, as an upper level low continues to spin over the Northeast U. Conditions will remain cool and damp, however, shower chances will decrease Saturday as the upper low slowly drifts east into Nova Scotia. Temperatures will be slightly warmer, with a few valley spots climbing into the upper 50s, but overnight lows will dip into the low to mid 40s.
1011 PM EDT Fri May 23 2025 Cooler and dry high pressure will remain across the area through Saturday.
257 AM CDT Sat May 24 2025 - Mainly dry and cooler than normal through Memorial Day.
1013 PM CDT Fri May 23 2025 (Tonight through Saturday night) Key Messages: - Moderate to Extreme Risk of Heat-Related Impacts (level 2/4 out of 4) A mid to upper level ridge will begin to move into the region tonight and hang around through early this weekend. As the ridge moves across the region, PWAT values are expected to decrease from 1. Apart from the drier air with the increased subsidence, temperatures will also be about 5 degrees warmer than today.
- Memorial Day Forecast: Mostly sunny with a slight (20%) chance of showers/thunderstorms in the afternoon and evening; high temps in the lower 60s to mid 70s (coolest east). As the low shifts southeast Sunday, precip chances (40-60%) will linger through the day in southeast MT and north central WY as cyclonic flow persists.
Large scale pattern across the northern Plains/upper Midwest continues to be dominated by blocking, with an Omega block through this weekend evolving into a Rex block type pattern mid week. Better chances arrive midweek as ensemble clusters are converging towards a closed upper low becoming centered near our CWA Tuesay-Wedesday. Even the stronger ensemble members are broad enough with the mid/upper low evolution over our area, minimizing this conditional risk at this time.
High pressure overhead with a system to our south today. This has kept more clouds across the southern part of Minnesota keeping temperatures there warmer this morning. Most notably there have been some below freezing temperatures in central Wisconsin. Western Wisconsin has remained warmer with the coldest air expected in Rusk County, where a Frost Advisory is in effect this morning. The rest of the holiday weekend will be similar with sunny to mostly sunny skies with highs near 70 thanks to our high pressure. Differences mainly persist more in the timing and location of the higher QPF amounts. This makes sense as the global deterministic models have a stacked upper low over us providing a good source of synoptic support for rain. Only average precipitable water values and warmer temperatures will need higher dew points for saturation as well.
1043 PM PDT Fri May 23 2025 - Warmer through Sunday with a minor HeatRisk.
300 AM EDT Sat May 24 2025 Cool and dry high pressure will build from central Canada over the Mid Atlantic region into the weekend.
120 AM EDT Sat May 24 2025 An upper level low, increasing in forward speed, will carry the widespread rain and drizzle eastward, giving way to more intermittent showers over Western New York overnight, and then region wide Saturday. Trough extending from the surface upwards through the atmosphere and the convergence upon it will settle southward tonight, with an area of light rain and drizzle dropping southward towards the southern Lake Ontario shoreline. Showers then taper off Sunday evening/night as the trough tracks to the southeast.
That observation sets the stage for today across the Keys; it will once again be warmer than normal, muggy, and primed for potential waterspouts somewhere along the island chain. Current conditions show temperatures in the lower 80s along most of the Keys, but some spots in the larger islands are able to radiate down to the lower to mid 70s. Model ensembles show longwave ridging over the Yucatan Peninsula and the southeastern CONUS is forecast to prevail through mid-week.
Slightly warmer weather is forecast for the interior Saturday. As a trough moves to the east, a weak ridge has started to fill in over northwestern California. Gusty northwesterly winds of 20-30 mph are possible this weekend in Lake and Mendocino counties as well, with the highest gusts in the late afternoon.
(Tonight through Sunday Night) What was an elongated warm front has turned into a stationary boundary that extends from the Great Plains down into the ArkLaTex region. As we move into Saturday night, lingering light showers may persist across the south with warmer low temps in the upper 50s to low 60s.
350 AM EDT Sat May 24 2025 - A few sprinkles with perhaps a couple isolated showers over The Thumb in store for Saturday and Sunday with gradual warming, into the low 60s.
1222 AM CDT Sat May 24 2025 (Tonight through Saturday night) Ridging aloft is likely to keep mostly dry and hot conditions across deep south Texas and the Rio Grande Valley throughout the short term, into Sunday morning. Otherwise, southeasterly winds will become breezy during the day with gusts up to 25-30 mph possible, mostly east of I-69 C, as a high pressure over the Gulf and lowering heights over the Sierra Madre result in a tightened pressure gradient. Temperatures in the low 100s are in store for the Rio Grande Plains.
1202 AM CDT Sat May 24 2025 (This evening through Saturday night) Upper troughing over the Great Lakes this afternoon, with ridging extending from West Texas northward along the lee side of the Rockies. Temperatures away from localized cooling due to thunderstorms were generally in the upper 80s to around 90 with dew points in the lower and middle 70s. The upper ridge axis will creep a bit eastward over the next 36 hours to be centered near the Sabine River Basin by Sunday morning.
To the north, pronounced ridging (2-3 sigma H5 height anomaly) extends well into Manitoba and the Hudson Bay region today through at least Sunday. Low H5 heights are present to the west and east of the ridge axis, resulting in a rather broad omega block pattern extending across the northern CONUS.
155 AM PDT Sat May 24 2025 Cooler with more widespread night and morning low clouds and fog this weekend. A low pressure trough moving inland over the region will bring increased mid and high clouds in an organized band, along with a deeper marine layer. The deeper marine layer will allow low clouds and fog to spread farther inland this morning and again tonight into Sunday morning before the trough moves east. Sunday won't be as cool with temperatures ranging from a few degrees above normal in the high deserts to a few degrees below normal in most other areas. Stronger onshore flow with the trough will bring locally strong and gusty westerly winds in the mtns and adjacent desert areas through tonight and again Sunday night.
120 AM EDT Sat May 24 2025 A low pressure system is currently located off the coast of Maine and is expected to gradually weaken and move east across the Maritimes through the weekend.
301 AM EDT Sat May 24 2025 Low pressure moving to the Maritimes will bring a few showers at times and cool temperatures today.
This high will keep light winds and dry conditions in place to start the holiday weekend. Pre-dawn QPF will be limited across the Low Country, with mainly dry conditions prevailing through daybreak south of a line from Beaufort to Statesboro.
Discussion: In the upper levels, this period starts with a trough over the Eastern U. By Sunday, flow becomes more zonal with a ridge building into the Midwest. At the surface, high pressure over Canada is extending down into the Ohio Valley. A stationary boundary or warm front will extend all the way to Alabama and Georgia.
333 AM EDT Sat May 24 2025 High pressure provides warm and dry conditions to begin the Memorial Day weekend. Low temperatures should range from the lower 50s to the lower 60s, coolest across the north and west. High pressure will produce mostly sunny skies and dry conditions today. The clouds and rain limit cooling at night with temperatures at daybreak Sunday in the lower to mid 60s. This will lift a warm front northward. With the boundary and rain keeping the low level lapse rates poor, convection may be elevated and hinder downburst winds.
Partly cloudy skies this morning across southeast Arizona as the region is under southwesterly flow aloft on the southeast flank of an upper low that is near the NV/UT border. The bulk of these high level clouds should move to our east this morning leaving us with considerable sunshine today as the upper low shifts to the east into Utah.
358 AM CDT Sat May 24 2025 - Slightly warmer temperatures expected tonight into Sunday morning, with more localized areas of frost.
(Today through Sunday) - Heat Advisory in Effect Today from 1 PM - 7 PM - Moderate to Extreme Risk of Heat-Related Impacts (level 2/4 out of 4)today and Sunday High pressure will be in control of the forecast for this weekend leading to clearing skies and increasing temperatures.
157 AM EDT Sat May 24 2025 The start of the holiday weekend features dry weather, with cooler than normal temperatures. Afternoon highs are anticipated to reach the 50s along the mountains and the upper 60s/low 70s across the lowlands amid passing mid to upper level clouds. A strong signal for decoupling overnight infers better potential for frost formation along the higher elevations of Randolph and Pocahontas Counties, where overnight lows tumble down into the low to mid 30s. A wave of low pressure will approach the lower Mississippi Valley Sunday with an elongated frontal boundary along or just south of the Tennessee Valley.