Aikyam-Lab/Synoptic-Bench huggingface dataset:
Clear and cold conditions continue tonight as a high pressure system near the Ozarks moves east towards the MS/TN Valleys. The relatively calm winds, cold airmass, and a clear sky will continue to contribute to efficient radiational cooling for overnight lows to drop below freezing tonight. Cold advection will also decrease as well, so may see temps similar to today's readings, or perhaps a couple degrees cooler.
Otherwise, upper ridging will prevail over the area today with occasional clouds. The ridge shifts E tonight, allowing SW flow to overtake the area. A weak cold front pushes SE through the area on Mon. The SW flow will herald the northern branch of a splitting trough that will cross the area Mon.
954 PM MST Sat Nov 19 2016 Current surface map places high pressure across the eastern Dakotas with trof/warm front across Montana/eastern Wyoming. Warm front will continue to shift east tonight and Sunday as upper level ridge builds across the northern plains. Northeast Wyoming and Black Hills will be 5-10F warmer than today.
In this scenario a few low lying areas could easily fall into the low to mid 20s later tonight which is colder than the original forecast. This will result in some slightly warmer temps across the west tonight with cooler reading in the east/southeast. South winds increase on Sunday with abundant sunshine expected to result in temps some 5 to 15 degrees warmer than today.
232 AM CST Sun Nov 20 2016 The cold weather looks like it's here to say, despite a large ridge of high pressure building across much of the central U.
350 AM CST Sun Nov 20 2016 Upper ridge poised over the region is forecast to remain largely stationary through tonight, but will deamplify as deeper SW flow and improving high level moisture draw closer. An 850 mb thermal ridge initially across the OK Panhandle is progged to shift close to I-40 by midday as lee troughing redevelops southward into northeast NM.
345 AM CST Sun Nov 20 2016 WV imagery shows an upper ridge over West Texas and Southeast New Mexico, while at the sfc, high pressure has moved sufficiently to the SE of the region to allow return flow to redevelop. Temps should rebound back to above-normal today under increasingly SW flow aloft as an upper trough makes landfall on the west coast, dampening the ridge and pushing it ESE.
346 AM CST Sun Nov 20 2016 (Today and Tonight) The Freeze Warning, currently in effect for the southeastern part of our area, expires at 9 AM when temperatures are expected to climb above the freezing mark.
308 AM EST Sun Nov 20 2016 Aloft - A ridge centered over the TX/Mexico border reached north to Canada while a low above the lower Great Lakes troughed southeastward to the Mid-Atlantic coast. Surface - Strong Canadian high pressure ridged south to TX and the western Gulf of Mexico. Broad low pressure in southern Quebec trailed a cold front that arced across New England then extended south and southwest through central FL and into the Gulf.
A weak embedded impulse within the upper ridge axis was observed lifting northeast across Missouri.
1030 PM CST Sat Nov 19 2016 A cool continental polar air mass spread across MN/WI today in the wake of the low pressure system and heavy snow that fell across a large swath of MN yesterday. The low stratus has been tough to clear in eastern MN in part due to the cool temperatures aloft and solar heating, which has lead to additional strato-cu development this afternoon. We are forecasting low temperatures that are on the low end of the model guidance spectrum because of this.
The broad area of low pressure will keep a good coverage of stratus through most of the day before the drier air starts eroding the clouds.
Satellite showing upper low remains off the coast this evening. A cold front currently located along the coast will move through the region Sun with rain likely. As the upper low moves away from the Pacific northwest Mon a drier westerly flow will develop with clearing skies. The next cold front moves through Tue night with another round of rain and mountain snow. Showers likely Sunday with a slow moving cold frontal passage.
311 AM EST Sun Nov 20 2016 The last of the stratocu will exit our east over the next few hours as the 1000-850 mb thermal trough lifts out in the wake of the upper trough. Excellent radiational cooling conditions tonight result in most temps in the low 20s.
High pressure will lead to very hot temperatures for the region into the end of the week. A shift in the pattern will allow monsoonal moisture and thunderstorm chances to increase for the weekend which will also bring cooler temperatures. Morning models resolved high pressure centered over the southern Great Basin at 5 AM shifting the high center east to the Nevada/Utah state line by 5 PM. Models show an inverted trough lying across central Arizona this morning with the western extension of this feature forecast to move into southern Mohave and southeastern San Bernardino counties this afternoon.
1034 AM EDT WED JUL 27 2016 A weak front will remain along or just to the south of the Commonwealth through tonight, as high pressure maintains warm and mainly dry conditions.
However, diurnal convection has shown some increase over the last hour or so, and this should be enhanced by the upper level low over ern LA today. near the center of a weak upper low that is drifting N across Ern LA. A weak upper low will drift west across the CWA today.
These thicker than anticipated clouds will keep Chattanooga and the extreme Southern Valley a few degrees cooler than previously forecast. Chattanooga Airport, TN 92 74 89 73 / 30 40 70 50 Knoxville McGhee Tyson Airport, TN 94 73 88 72 / 30 40 70 50 Oak Ridge, TN 93 73 86 72 / 30 40 70 50 Tri Cities Airport, TN 93 70 87 69 / 30 30 70 50.
Mid morning water vapor imagery reveals abundant moisture across the area this morning with the center of the mid/upper level anticyclone positioned over northwest Arizona. Hi-res models from the UofA as well as the HRRR and HRRRx indicate storms developing on the Rim by early afternoon and descending into the lower deserts around 00z. Expect the storms later today to develop over the White mountains and move SW off the higher terrain into valley locations mainly south and east of Tucson.
1201 PM EDT WED JUL 27 2016 High pressure is weakly in place across the region.
730 AM EDT WED JUL 27 2016 Aviation A slow moving cold front will result in scattered thunderstorms today, mostly north of I-96. Due to the clouds and showers it will be cooler with highs in the lower 80s.
930 AM EDT WED JUL 27 2016 Warm high pressure remains over the area today with temperatures warming into the 80s and 90s.
An Atlantic ridge of high pressure will extend across central Florida this afternoon. In the mid to upper levels of the atmosphere, a trough of low pressure near the Florida Keys will progress to the west-northwest today. Atmospheric moisture will decrease this afternoon as the mid to upper level trough of low pressure moves farther away from the service area.
To the south, there are breaks in the clouds which will allow for some sun at least part of the day and warmer temperatures and better instability. Southeast low level flow with high pressure in central Canada and low pressure in the Great Basin will keep high dew points over the northern plains. Upper disturbances along with daytime convection off the higher terrain should help pushing showers and thunderstorms across the region through the period.
939 AM EDT WED JUL 27 2016 Mean layer high pressure is centered just east and southeast of the forecast area with moisture levels a bit lower than this time yesterday. agree with previous forecast of lower POPS overall than yesterday and warmer temps.
928 AM EDT WED JUL 27 2016 Upper ridging taking control over the region with dry air rotating overhead from the E-SE as seen in WV imagery.
1147 AM EDT WED JUL 27 2016 High pressure over the region will keep above normal temperatures in the forecast through the end of the week. The upper level ridge will remain over the region today. Any convection will be isolated and mainly north and west of the region around upper ridge. High pressure will continue to be the dominant feature both aloft and at the surface on Thursday in fact subsidence inversion may strengthen.
1244 PM EDT WED JUL 27 2016 An inland trough and Bermuda high pressure offshore pattern will prevail through the week. except a bit cooler where any storms occur. Persistent mid-state trof and Bermuda high will continue into the weekend.
634 AM CDT WED JUL 27 2016 The pesky cold front that has been impacting our weather over the past 24 hours will be along our southeastern border at 12Z this morning.
A mid-level high pressure system building over the Great Basin will funnel some drier air over northern and central New Mexico today and Thursday causing thunderstorm coverage to trend downward both days and temperatures to increase.
A weak upper level impulse will move around the western periphery of the ridge centered off the east coast today. This feature will lift through the Mississippi/Arkansas/Tenn area this afternoon and be absorbed into a broad trough that will set up over the region that will persist through the weekend.
Otherwise mostly sunny and very warm/hot across the lower elevations.
WESTERN RIVERSIDE AND SOUTHWESTERN SAN BERNARDINO At 9 AM PDT, water vapor satellite imagery displayed an upper- level ridge centered over the NV/UT/AZ border, with southeasterly flow aloft.
1027 AM EDT WED JUL 27 2016 Atlantic high pressure will prevail through the weekend while a weak trough persists inland. The center of the expansive subtropical ridge will continue to stagnate right along the southeast U. Convection allowing high resolution models are very scant on shower/tstm coverage this afternoon as anticipated with the high pres dome providing subsidence and quite warm temps aloft. Strong ridging overhead and the associated subsidence will keep the mid and upper levels warm and dry through the end of the workweek.
/issued 444 AM CDT WED JUL 27 2016/ SHORT TERM (Today through Thursday): General weak upper level troughing remains across the western half of the Gulf of Mexico as the over all flow pattern continues to move westward. A weak upper level low pressure center is situated over the Louisiana coastline. The weak upper level low centered over the region is allowing for some ascent over mainly the western Upper Valley and Ranchland locations of the CWA. Do expect that any lingering precip will likely dissipate as the low continues to move west to the higher terrain of Mexico. High pressure will then fill back in over the region with dry and hot weather retuning.
SREF cig/vsbys prog shows axis of some higher probs later tonight into Thursday as post-frontal cooler airmass/low level thermal trough starts to exert itself across srn WI. Will slowly increase PoPs from north to south, beginning this morning in the far north to acknowledge possibility in the GFS and some of the hi-res models of a weak mid-level trough sagging into the area. Best chances for showers and storms come with the passage of the short wave trough and associated surface wave late this afternoon and tonight. Will have the highest PoPs with the stronger frontogenetic response across the northern half of the CWA tonight.
705 AM EDT WED JUL 27 2016 Atlantic high pressure will prevail through the weekend while a weak trough persists inland. The center of the expansive subtropical ridge will continue to stagnate right along the southeast U. Convection allowing high resolution models are very scant on shower/tstm coverage this afternoon as anticipated with the high pres dome providing subsidence and quite warm temps aloft. Strong ridging overhead and the associated subsidence will keep the mid and upper levels warm and dry through the end of the workweek.
743 AM EDT WED JUL 27 2016 High pressure is weakly in place across the region.
1047 AM EDT WED JUL 27 2016 Strong high pressure will remain off the southeast coast through the end of the week with a weak frontal boundary lingering over the area through Thursday. Another hot and humid day in store for today with high pressure remaining off the se coast. High temps in the low/mid 90s this aftn.
1018 AM EDT WED JUL 27 2016 Warm and mainly dry conditions can be expected until the approach of low pressure later tonight and on Thursday. POPs will be on the increase with the approach of low pressure on Thursday. For now, highest POPS and QPF resides over the southeast portions of the forecast area where the track of the low should progress.
915 AM EDT WED JUL 27 2016 An inland trough and Bermuda high pressure offshore pattern will prevail through the week. except a bit cooler where any storms occur. Persistent mid-state trof and Bermuda high will continue into the weekend.
Temperatures in the lower valleys expected to exceed 100F once again today.
/issued 316 AM CDT WED JUL 27 2016/ West TX and SE NM will remain under fairly weak NE flow aloft with an upper ridge centered to the NW and an inverted trough to the east.
Nudged highs up a degree or two for most areas as temperatures should not have any problem reaching the lower 90s, especially northern zones. Somewhat stronger deep layer shear around 20 knots versus yesterday along with slightly cooler mid level temperatures around -6C will allow for some strong storms with wet microbursts and brief locally heavy rain this afternoon as well, but no widespread strong or severe convection is anticipated. Approaching upper trough and enhanced ingredients ahead expected to combined for scattered to numerous showers and storms across the mid-state late today and tonight.
905 AM EDT WED JUL 27 2016 High pressure is weakly in place across the region.
1217 PM EDT WED JUL 27 2016 Update A slow moving cold front will result in scattered thunderstorms today, mostly north of I-96. Due to the clouds and showers it will be cooler with highs in the lower 80s.
1244 PM EDT WED JUL 27 2016 Warm and mainly dry conditions can be expected until the approach of low pressure later tonight and on Thursday. POPs will be on the increase with the approach of low pressure on Thursday. For now, highest POPS and QPF resides over the southeast portions of the forecast area where the track of the low should progress.
near the center of a weak upper low that is drifting N across Ern LA. A weak upper low will drift west across the CWA today.
An upper level low will move across the Mississippi Delta today with showers and thunderstorm increasing in coverage, especially in the afternoon. The area currently lies between two anticyclones, one centered over the four corners and the other over the southeast conus. In between these two features is a compact upper low, currently shown by moisture channel imagery to be located near Monroe Louisiana. Models all showing showers and thunderstorms becoming widespread as the day progresses, especially over the east and southeast along the path of the aforementioned upper low. This upper low will be kicked out of the region late in the day as upper flow becomes mores northwest in nature and the low gets caught up in a developing upper trough.
135 PM EDT TUE JUN 14 2016 Mostly clear skies are expected for the next couple of days as high pressure sits over the northeast.
Recent near/short range real-time data, PV analysis, forecast model soundings and computer simulations indicate that a dry and warmer southwesterly upper flow pattern will be noted over the forecast district into Wednesday with above to well above mid-June climatological average temperatures anticipated. Computer models show a very large, very warm upper level ridge of high pressure building over the western U. Most models agree that the core heights on this ridge will equal or exceed 600 decameters by the weekend, which is about as high as you will ever see them over this part of the country. As this massive ridge takes hold, temperatures will soar to well above average and possibly record levels.
320 PM PDT TUE JUN 14 2016 An upper level trough will bring cooler temperatures and increased cloud cover to Northwest California this week.
253 PM EDT TUE JUN 14 2016 Stubborn low pressure continues to slowly drift over the Canadian Maritimes. It will gradually slip off to the northeast through Wednesday as high pressure builds in from the west. Upper low drifts farther E Wed. The core of the cooler air aloft also will be farther E. meaning warmer daytime temps and less diurnal cloud cover. Influences of the upper low diminish even further Wed night.
627 PM EDT TUE JUN 14 2016 Low pressure over New Brunswick will slowly move east across the Gulf of Saint Lawrence through Wednesday. A ridge of high pressure will then move in late in the week with gradually drier conditions. sunnier and warmer conditions for the region. The eastern side of Maine still hanging on to most of the cloud cover still w/in the circulation of the upper low. breezy NW winds will cont til Wed aftn, and with a little more in sunshine, fcst hi temps should be at least 5 deg warmer than tdy. Both winds alf and the sfc pres grad lessens Wed ngt for lighter winds and perhaps some radiational cooling for cooler ovrngt lows spcly ovr wrn vlys.
146 PM EDT TUE JUN 14 2016 High pressure over the eastern lakes will move off the east coast Wednesday. allowing a warm front to lift across the forecast area.
Showers and thunderstorms will continue to wrap around an area of low pressure centered near Sioux Falls this morning. Shear isn't very great however, with best low level turning associated with a warm front across northeast counties, and 0-6kt shear only tops out around 30kts in southeast counties. 850mb temperatures remain around 20C as the low passes, so temperatures will remain close to average going into Wednesday.
300 PM MDT TUE JUN 14 2016 Upper ridging has brought warmer temperatures and drier conditions to Colorado today with convective stunted in growth. Look for skies to clear and winds to diminish as the sun sets, with minimum temperatures tonight a few degrees warmer than last night. Look for much warmer temperatures Wednesday as 700 mb temps increase about 4 degrees C.
A deep upper low will bring cool showery weather tonight with thunderstorms possible this evening.
Cold front will continue to push across the CWA this afternoon bringing widespread showers and thunderstorms.
334 PM CDT TUE JUN 14 2016 Weak upper trough axis located just west of middle TN today. Moist southerly flow in the lower levels has combined with ample heating to produce scattered showers and thunderstorms across the area. On Wednesday, weakening trough axis shifts to our east.
650 PM EDT TUE JUN 14 2016 Stubborn low pressure continues to slowly drift over the Canadian Maritimes. It will gradually slip off to the northeast through Wednesday as high pressure builds in from the west. Upper low drifts farther E Wed. The core of the cooler air aloft also will be farther E. meaning warmer daytime temps and less diurnal cloud cover. Influences of the upper low diminish even further Wed night.
323 PM EDT TUE JUN 14 2016 High pressure dominates across the region tonight into Wednesday with mostly clear skies. High pressure moves out Wednesday as warm front approaches the region from the south and west. Dry through the period with increasing clouds on Wednesday ahead of the aforementioned warm front. Modest inconsistencies among the models handling the warm front and associated precip.
Upper level ridging will slowly build over the area tonight with conditions gradually improving to VFR everywhere. activity as a result of the weak upper low pressure over this portion of the state. potential for SHRA/TSRA will decrease as some upper level ridging will be developing over the state. keep at least some mention of afternoon convection with the high levels of moisture and potential instability expected. chances for precip will be less than seen the past few days as a more pronounced upper level ridge influence will be seen. As a result of the upper ridge expanding over the CWA. temps will be even warmer.
Lows tonight will range from the middle 60s to the lower 70s. Actual surface warm front was located well southwest of this where convection was firing from Iowa into central Illinois and southern Indiana. As this occurs what is expected to be at least a broken area of thunderstorms will move out of Iowa across northern Illinois later tonight along the warm front. expanding east into Weds morning as warm front advances north. Temperatures will remain on the cooler side NE in the 60s with lows near/above 70 SW in the warm sector. After the warm front moves north of the area Weds morning.
321 PM CDT TUE JUN 14 2016 18Z surface data has low pressure in eastern South Dakota. A warm front runs east southeast from the low into southwest Wisconsin and then into northern Illinois. Weakly inferred boundaries were south of this warm front from central Iowa into central Illinois. Dew points were in the 50s and 60s north of the warm front and in the 70s south of the front. Locally heavy rainfall will be possible due to the high moisture content of the atmosphere. It is possible that localized amounts approaching 2 inches may occur roughly in the highway 20 corridor. After midnight, the cold front will sweep through the area.
232 PM MDT TUE JUN 14 2016 The main upper low is now crossing the eastern Dakotas as it swings northeast.
By the afternoon, expecting temps to once again reach the lower 90s for most spots with heat indices nearing the 105 degree mark so it will be another hot, uncomfortable day for most. The synoptic pattern through the later portion of the week and into the upcoming weekend will feature weak troughing aloft over the eastern Gulf of Mexico and southeastern Conus. the subtropical ridge will be aligned over southern FL peninsula/FL straits.
Temperatures should be able to reach the low to mid 80s with dewpoints edging into the low 70s, providing substantial CAPE edging into the 2000 J/kg range for the afternoon.
SHORT TERM (Tonight through Wednesday Night): Mid level ridging will remain in place over Texas through the short term. High temperatures Wednesday will range from the lower 90s near the coast to the mid and upper 90s across the mid valley to above the century mark across the upper Valley and the West. In addition, high pressure over the Gulf of Mexico will interact with lower pressure inland to produce moderate to breezy and gusty southeast to south winds on Wednesday.
Upper level ridging has been increasing so do not expect much more activity the rest of the afternoon. Overall moisture in the atmosphere will be lower tomorrow and the upper level ridge will continue to increase so do not expect any convection tomorrow.
306 PM CDT TUE JUN 14 2016 Current 20Z Water Vapor shows a modified North Pac Low over the Dakotas with associated warm front extending into the Ohio Valley. Subsidence is settling into the area as the upper trough is rotating through Nebraska with the very southern extent working through northeast Kansas. Therefore, have gone with a mostly dry forecast the remainder of the day with only slight chances of a few showers or storms developing as the upper level trough continues to lift completely out of the area by late this afternoon. Tomorrow, will be warming considerably with the heat index for most locations over northeast Kansas reaching into the upper 90s and low 100s as larger amplitude ridge begins building in just to the west of the forecast area.
1125 AM MDT TUE JUN 14 2016 Current IR and Watervapor satellite loops show the upper level trough axis pushing into Wyoming at this hour. This trough axis will move into eastern Colorado and western Nebraska shortly.
652 PM EDT TUE JUN 14 2016 Stubborn low pressure continues to slowly drift over the Canadian Maritimes. It will gradually slip off to the northeast through Wednesday as high pressure builds in from the west. Upper low drifts farther E Wed. The core of the cooler air aloft also will be farther E. meaning warmer daytime temps and less diurnal cloud cover. Influences of the upper low diminish even further Wed night.
124 PM EDT TUE JUN 14 2016 Low pressure over the maritimes will slowly drift off to the northeast through Wednesday, as high pressure builds in from the west.