Aikyam-Lab/Synoptic-Bench huggingface dataset:
1246 AM CDT Sat Apr 17 2021 A forecast update is in place for slightly warmer low temperatures across wrn Nebraska tonight. Upper low is located along the NE/KS border south of the Hastings area this afternoon. Cold conveyor of moisture continues to wrap westward into western and north central Nebraska to the northwest of the low. Paved road surface are all just wet this afternoon as temperatures are above freezing. Earlier today locally heavy accumulations did occur, and were highly dependent on elevation as temperatures generally remained at or just above freezing. The upper low will move eastward overnight and precipitation will end this evening.
Elongated mid/upper trough was situated over the Central Plains.
Dry air in the lower levels will mix down to the surface today producing low RH's across the Northland.
Some clouds will be found across northeast IA and southern WI associated with a low pressure area over MO. Highs will be slightly cooler today as cold advection occurred overnight with a cool push from the northeast.
This will keep cloud cover across our region so trended temperatures toward the cooler side of guidance which keeps most of the area in the 50's.
1230 AM CDT Sat Apr 17 2021 226 PM CDT There are no significant weather concerns through the period, with generally dry and seasonable weather expected through the weekend, though with some cloud cover and cooler afternoon lake breezes. However, a lake breeze shifting inland over northeastern IL and northwesterly Illinois is resulting in much cooler conditions near the lake. Expect temperatures on Saturday to be similar to those of today, with readings topping out near 60 for inland areas, but remaining much cooler near the lake due to another day of onshore winds.
Cold front has now cleared all but our most southern offshore marine zone with scattered and shallow showers in its wake.
Winds will become northerly by morning behind a surface cold front and become gusty. /issued 953 PM CDT Fri Apr 16 2021/ A coastal trough is located just off the coast this evening. A surface cold front will be moving across the forecast area overnight and early Saturday, further adding some lift keeping rain chances high, with rain chances decreasing behind the cold front in the morning. The high moisture content to go along with nearly wet and saturated grounds gives some concern to heavy rainfall and flash flood potential. Fortunately instability in the low levels in very limited, and this is helping to keep rainfall rates relatively low.
A weakening mid level trough is pushing through the mid Mississippi Valley this morning. Temperatures are in the lower to mid 50s with light north winds. The mid level trough will continue to weaken and push east. There will still be a quite a bit low level moisture left around so clouds will prevail most of the day with perhaps a few breaks by late afternoon with highs in the lower to mid 60s.
152 AM EDT Sat Apr 17 2021 Though dry most of the time, clouds and a few spotty showers will persist today through tonight as we reside on the back side of departing low pressure.
221 AM MDT Sat Apr 17 2021 An upper ridge will move through Montana today with warm and dry weather. Highs will be in the lower to mid 60s in most areas.
High pressure continues to dominate the Pacific Northwest. The warmest day is Saturday with highs in the low 80s possible in spots. Dry and warm conditions continue across the region into the weekend as upper level high pressure remains in place.
357 AM CDT Sat Apr 17 2021 Our seemingly resident frontal boundary remains over the coastal waters early this morning, with the main high pressure centered over Colorado. Early morning temperatures and dew points are in the lower and middle 60s.
250 AM EDT Sat Apr 17 2021 Low pressure will gradually move eastward to the south of the Maritimes today.
Surface analysis depicts weak high pressure centered east of the Bahamas with a ridge axis extending west through the outer Florida Straits, and a frontal boundary extending from east of Florida across the central peninsula and along the northern Gulf of Mexico to the Texas coast. Zonal flow prevails aloft across the southern tier of the CONUS and the Gulf, with a flat lower/mid level ridge centered near Cuba. The 00Z Key West sounding reflected the influence of this nearby ridge, with multiple inversions between 2000 and 7500 feet, very dry mid levels, and near normal PW of 1. The nearby lower/mid level ridge will remain the dominant weather feature across the Keys through the weekend, providing mostly clear skies and suppressing any shower activity.
1218 AM CDT Sat Apr 17 2021 (This evening through Saturday) Early this afternoon, the cold front was along the I-10 corridor and will be south of the far southern counties shortly after 3 PM.
These showers are associated with a weak upper trough that will continue flatten out through the day today. Skies will remain rather cloudy today with highs in the low to mid 60s. Another weak upper trough will swing out of the central plains tomorrow afternoon bringing the possibility of a couple light showers tomorrow evening along and north of I-40.
Otherwise, expect another cool day as high pressure builds across the southern Plains.
The lack of meaningful flow will keep the cooler airmass over the region with cloud cover governing the high temperatures today. This would put temperatures this afternoon in the low to mid 50s.
(Today and tonight) A ridge of cool high pressure will remain over Oklahoma through the short term period.
1003 PM MDT Fri Apr 16 2021 The upper low is crossing the central Great Plains at this time, as it begins to phase back into the main flow.
Scattered light showers and isolated thunderstorms will redevelop over southern Nevada and northwest Arizona this afternoon associated with an upper low.
/issued 238 PM CDT Fri Apr 16 2021/ Upper trough over the Great Plains will swing east today as a secondary lobe extends back to NV.
Today and tonight, an upper level trough will push southeast across the Central Plains while another trough slowly pushes south across the Four Corners region. With the mostly cloudy to overcast skies today and the cooler air continuing to move in, expect cool highs in the mid to upper 50s.
1208 AM MDT Sat Apr 17 2021 At the start of the forecast period today, an upper air trough resides over the CWA leaving westerly flow aloft. Tonight, the westerly flow continues as the trough slowly makes progress eastward. Overnight lows for the CWA expect to range between the middle 20s to the lower 30s. On Saturday, forecast guidance shows the upper air flow turn northerly during the day and then northwesterly going into the night as the trough moves eastward away from the CWA with another trough descending southward from Canada towards the CWA. Daytime high temperatures expect to range from the lower 40s in the western parts of the CWA to the lower 50s in the eastern parts. Overnight lows in the lower to upper 20s range can be expected.
1114 PM CDT Fri Apr 16 2021 A forecast update is in place for slightly warmer low temperatures across wrn Nebraska tonight. Upper low is located along the NE/KS border south of the Hastings area this afternoon. Cold conveyor of moisture continues to wrap westward into western and north central Nebraska to the northwest of the low. Paved road surface are all just wet this afternoon as temperatures are above freezing. Earlier today locally heavy accumulations did occur, and were highly dependent on elevation as temperatures generally remained at or just above freezing. The upper low will move eastward overnight and precipitation will end this evening.
1014 PM MDT Fri Apr 16 2021 H5 trough continues to drop southward today, with only very light snow showers bubbling up in places, but not dropping much of anything. Models continue to bring weak high pressure into the region briefly tonight into the weekend, with a modest moderating trend on Saturday back into the 40s.
Cold front continues to advance across northeast OK and will push into northwest AR and southeast OK over the next few hours. A cold front extending from near Vinita to Okemah at this time will continue moving southeast across the area, with increasing northerly winds in its wake.
310 AM EDT Sat Apr 17 2021 Impactful weather: Freezing temperatures for sensitive agricultural areas of NW lower Michigan. Pattern synopsis and forecast: Deep low pressure has pushed off into the Atlantic, while additional upper troughing was seen from north of Ontario back through the Central Plains and Rockies. The deep low pressure will continue to work up the Atlantic coast through tonight, while the weak upper troughing does work into the region tonight.
255 AM EDT Sat Apr 17 2021 A weakening upper low, currently over NW MO, will send fragmented vort lobes through the upper pattern today resulting in light rain chances. 05 inches across the CWA with the highest of those amounts falling north of the Parkways.
1000-500mb geopotential height rises due to a combination of differential cyclonic vorticity advection and modest mid to upper level confluence has resulted in background forcing favorable for subsidence and surface ridging over Southeast Michigan. Did lower readings a degree or two based on some relatively cooler temperatures residing at the top of the mixed layer.
1010 PM MDT Fri Apr 16 2021 At the start of the forecast period today, an upper air trough resides over the CWA leaving westerly flow aloft. Tonight, the westerly flow continues as the trough slowly makes progress eastward. Overnight lows for the CWA expect to range between the middle 20s to the lower 30s. On Saturday, forecast guidance shows the upper air flow turn northerly during the day and then northwesterly going into the night as the trough moves eastward away from the CWA with another trough descending southward from Canada towards the CWA. Daytime high temperatures expect to range from the lower 40s in the western parts of the CWA to the lower 50s in the eastern parts. Overnight lows in the lower to upper 20s range can be expected.
Temperatures today will range from the low to mid 80s along the boundary, limited by rain and cloud cover, reaching the upper 80s to lower 90s for areas south of Melbourne.
Today Through Sunday Night As of 09Z, the bulk of rainfall has moved east of the area with redevelopment occurring across eastern OK, far northwestern AR, and the southern half of MO in close proximity to a slow moving disturbance embedded within a larger area of mid/upper troughing. Water vapor imagery captures this well and places the center of mid/upper troughing over northwestern MO this morning with dry slotting over much of AR. QPF will remain on the low side and thunder is not anticipated. Tonight, cooler air will filter into the region as surface ridging tries to nose in from the west and lows will fall into the upper 30s to upper 40s.
557 AM EDT Sat Apr 17 2021 Impactful weather: Freezing temperatures for sensitive agricultural areas of NW lower Michigan. Pattern synopsis and forecast: Deep low pressure has pushed off into the Atlantic, while additional upper troughing was seen from north of Ontario back through the Central Plains and Rockies. The deep low pressure will continue to work up the Atlantic coast through tonight, while the weak upper troughing does work into the region tonight.
This will keep cloud cover across our region so trended temperatures toward the cooler side of guidance which keeps most of the area in the 50's. Clouds may clear out for a brief period tonight which could help temperatures drop quickly however it appears that additional cloud cover should move in towards daybreak Sunday which may keep temperatures slightly warmer. Regardless, near freezing temperatures will be possible for portions of the south central and southwestern Texas Panhandle as well as the northwestern South Plains.
/issued 320 AM CDT Sat Apr 17 2021/ A cold front moved through the area yesterday bringing cooler temperatures to the area.
Otherwise, cooler than normal temperatures will continue through the period with highs only in the 60s today and lows in the upper 40s to lower 50s Sunday morning.
Skies will likely remain mostly cloudy through the day which will keep temperatures on the cooler side. Chattanooga Airport, TN 68 46 70 47 72 / 20 0 10 10 0 Knoxville McGhee Tyson Airport, TN 64 45 67 45 69 / 30 10 10 10 0 Oak Ridge, TN 63 43 67 44 69 / 30 10 10 10 0 Tri Cities Airport, TN 59 42 63 40 67 / 30 20 20 20 10.
GOES visibile satellite imagery is highlights a cluster of deeper clouds over the Straits of Florida south of the Lower and Middle Keys. High pressure docked east of the Bahamas will continue to dictate the overall tranquil marine conditions for the balance of the weekend.
332 AM MDT Sat Apr 17 2021 While yesterday's system moves into the MS River Valley, another trough over the western CONUS will slowly push east towards the Tri- State area today. Current guidance has the trough axis moving across the area during the overnight hours. While we wait for this upper- level trough to move in, the winds aloft are expected to become zonal to the west with winds from the surface to the mid-levels keeps us cool with NW flow. At the surface, a lee trough is expected to move across the Plains today providing potential for rain showers during the afternoon and ending around sunset. Sunday, the upper level trough will continue to move across the Plains as a ridge builds and moves onto the West Coast.
Temperatures fall below freezing in most locations, with a westerly wind beginning to warm things up by daybreak. Sunday: A very warm day is expected on Sunday ahead of a strong west to east oriented cold front. Recent models have trended a bit towards splitting the energy moving out of the Canadian trough, with a lead wave moving through the Northern Great Lakes and a secondary push of energy lagging and tracking more through the Western Plains. This scenario could really stretch out the forcing, lead to drier air undercutting the low level forcing, and result in a more narrow and limited precipitation potential.
612 AM CDT Sat Apr 17 2021 Short term forecast challenges involve pcpn chances ending this morning and the incoming strong cold front late in the weekend and the changes it poses to our weather conditions. This activity is in association with an upper trough/vort max stretching from southwest to northeast across the region. A high pressure ridge will drift over the region later today through the overnight into Sunday morning. The aforementioned strong cold front will be approaching our area Sunday morning coming southward across ND. Overall, the mid-level pattern over the CONUS during the period should feature mean troffing over the central/eastern part of the country.
An upper level trough currently located from west central through northeast SD will drop south into the area today. A strong cold front will drop south into southern SD by late Sunday afternoon. Went warmer and nudged to above the 50th percentile of blended model guidance at 62 to 65 degrees most locations. The strong cold front will drop quickly south through the area Sunday night.
The upper level low continues to move to the east of the area today, but another wave will move into the area during the day. High temperatures will continue on the cooler side. The high moves to the east on Sunday and with warm advection the temperatures will warm up. A cold front moves through the area Sunday night.
Freezing temperatures are likely everywhere, from around 32 in Medicine Lodge to mid 20s through the Ark river valley west of Garden City. Warmer highs are forecast for Sunday in the 60s with similar moderate northerly surface winds.
416 AM CDT Sat Apr 17 2021 Short term forecast challenges involve pcpn chances ending this morning and the incoming strong cold front late in the weekend and the changes it poses to our weather conditions. This activity is in association with an upper trough/vort max stretching from southwest to northeast across the region. A high pressure ridge will drift over the region later today through the overnight into Sunday morning. The aforementioned strong cold front will be approaching our area Sunday morning coming southward across ND. Overall, the mid-level pattern over the CONUS during the period should feature mean troffing over the central/eastern part of the country.
500 AM MDT Sat Apr 17 2021 An upper trough is currently stretched from Hudson Bay, crossing northern Colorado and down into the Great Basin. This trough will sink south today to decrease the weak lift it brought over the area overnight. The weather will be mild and dry in northeast Colorado on Sunday under subsidence and weak ridging aloft.
Another upper level low pressure system will approach the region on Sunday, forcing showers across the region.
The lack of meaningful flow will keep the cooler airmass over the region with cloud cover governing the high temperatures today. This would put temperatures this afternoon in the low to mid 50s. Slightly warmer temperatures for Sunday as dry westerly flow will support more sun while mixing depths increase to around 2km (per NAM) during the afternoon.
Models are in good agreement showing a vort max dropping out of the Canada into the upper Midwest with an associated cold front inducing precip across the Dakotas/MN Sunday afternoon.
A strong cold front will push south across Montana tomorrow, bringing rain that will quickly transition to all snow by later Sunday afternoon as colder air dives southward.
Some of the clearing cloud cover will allow for cooler temperatures tonight.
A weakening upper low, currently over NW MO, will send fragmented vort lobes through the upper pattern today resulting in light rain chances. 05 inches across the CWA with the highest of those amounts falling north of the Parkways.
419 AM CDT Sat Apr 17 2021 Ridge of high pressure will continue to bring mainly clear skies, dry, and warming conditions today. Tonight then sees increased cloud ahead of an approaching cold front. Sharp cold front looks to move through the area on Sunday morning.
A weakening mid level trough is pushing through the mid Mississippi Valley this morning. Temperatures are in the lower to mid 50s with light north winds. The mid level trough will continue to weaken and push east. There will still be a quite a bit low level moisture left around so clouds will prevail most of the day with perhaps a few breaks by late afternoon with highs in the lower to mid 60s. Should see a sunny start then increasing clouds as a another mid level trough swings through the area.
This is part of the area of high pressure and thermal trough pattern our area is experiencing. This trend will continue through the weekend, with Sunday being the warmest day when the thermal trough pushes inland.
Ridge of high pressure will continue to bring mainly clear skies, dry, and warming conditions today. Tonight then sees increased cloud ahead of an approaching cold front. Sharp cold front looks to move through the area on Sunday morning.
/Today through Sunday/ Near zonal flow aloft and cold air advection at the sfc continue in the wake of an upper disturbance and cold front associated with a trof over nrn MO. This general pattern is fcst to continue through the short term pd, as an west-east oriented trof axis lingers across the central latitudes of the CONUS.
526 AM MDT Sat Apr 17 2021 Anchored western NOAM ridge will continue to support long trajectory N-S flow over central NOAM. Another potent trough will slide down the front of the ridge, supporting a strong cold front into the region Sunday, with accumulating snow and a period of below normal temps. This will allow for warmer temps the next 2 days, with mainly dry weather. Cold front will move rapidly south Sun with the northern third not expected to be as warm, esp with increasing clouds. Post frontal precip will then spread south, per the cold front aloft, with increasing LSA, aided by the right rear entrance of a jet streak.
629 AM EDT Sat Apr 17 2021 Low pressure will gradually move eastward to the south of the Maritimes today.
A weak low pressure trof will pass to the south of Wisconsin today as dry low to mid-level flow continues across the area. The low levels will remain dry so no precipitation is expected. Weak short wave ridging, westerly winds and slight warming in the low levels will result in a pleasant day on Sunday. Daytime temperatures should near or eclipse the 60 mark across most inland areas, but in the east, another day of light winds off the lake will result in cooler temperatures. Short and mid-range guidance remains in good agreement on strengthening low pressure in southern Canada on Sunday.
628 AM CDT Sat Apr 17 2021 (Today and tonight) A ridge of cool high pressure will remain over Oklahoma through the short term period. By sunrise on Sunday, temperatures will drop to near freezing in the northwest, quite possibly dipping below freezing for a few hours.
Cooler weather possible by early midweek, with the chance of some mountain showers. High pressure will continue to slowly build into the region today, while an elongated trough continues to move south and eastward. The mountains and foothills look to be slightly windier with gusts generally in the 15 to 35 mph range, locally stronger for the higher elevations of the Sierra. By Sunday, high pressure should become the dominate forecast feature resulting in widespread warming across interior NorCal.
537 AM MDT Sat Apr 17 2021 While yesterday's system moves into the MS River Valley, another trough over the western CONUS will slowly push east towards the Tri- State area today. Current guidance has the trough axis moving across the area during the overnight hours. While we wait for this upper- level trough to move in, the winds aloft are expected to become zonal to the west with winds from the surface to the mid-levels keeps us cool with NW flow. At the surface, a lee trough is expected to move across the Plains today providing potential for rain showers during the afternoon and ending around sunset. Sunday, the upper level trough will continue to move across the Plains as a ridge builds and moves onto the West Coast.
This will keep cloud cover across our region so trended temperatures toward the cooler side of guidance which keeps most of the area in the 50's. Clouds may clear out for a brief period tonight which could help temperatures drop quickly however it appears that additional cloud cover should move in towards daybreak Sunday which may keep temperatures slightly warmer. Regardless, near freezing temperatures will be possible for portions of the south central and southeastern Texas Panhandle as well as the northwestern South Plains.
The next weather system to affect the region will be a back door cold front arriving late Sunday afternoon and Sunday evening.
Overall, generally MVFR will prevail through the next 24 hours with low cloudiness and precipitation occurring in the wake of the recent passage of a cold front. /issued 308 AM CDT Sat Apr 17 2021/ SHORT TERM (Today through Sunday): Strong to severe thunderstorms over the neighboring high terrain in Mexico, and convection in general, continues to flirt with the BRO CWFA as a cold front transitions through the region.
Otherwise, temperatures across interior valleys will be warm during the next couple of days, while at the coast, periods of stratus will favor cooler conditions. An upper-level ridge remains positioned north-south along the west coast early Saturday morning. A relatively cold/dense airmass was spreading south into NV in the wake of the previously mentioned trough. Easterly ridgetop winds were becoming locally gusty as a result over portions of NRN CA.