Aikyam-Lab/Synoptic-Bench huggingface dataset:
927 PM PST Sun Mar 5 2017 The weather will remain active, as a cold upper level trough begins to shift into the region.
252 AM EST Mon Mar 6 2017 High pressure along the coast will move offshore Today.
Satellite shows low clouds developing across the Lower Trans Pecos (just se of FST) with SE winds around 15kts at FST/MAF.
The gusty winds are in response to a tightening pressure gradient ahead of a developing low in the northern plains and a large area of high pressure centered over the mid atlantic coast.
Forecast area remains under the influence of an approaching upper level trough. At the surface, low pressure remains centered over southeast Montana and a cold high pressure airmass over Canada continues to push into central and southwest portions of the state. After a lull in precipitation, additional snow showers may develop after 18Z/Mon as the region remains underneath an upper-level trough of low pressure. At the surface, a fairly impressive cold front continues to push south toward southern Montana.
The upper ridge will amplify a bit today but also shift east of the lower OH and TN valleys in advance of the upper trof entering the central U. A distinct warm conveyor belt will shift into the lower MS valley this evening, associated with the low level jet of 50-65kt. This will produce mostly light precipitation intially in advance of the cold front in MO, AR, and TX.
The day begins with an amplified long-wave upper-level pattern across CONUS, with the ridge over the East. The western trough is digging east into the central plains east of us. The very distinct cold front will have pushed mostly through our area, but the base of the trough will be ejecting abundant moisture northeast over the cold front. The much colder air-mass mixing in behind the cold front will produce snow and a wintry mix.
Cigs may actually scatter late in the day, but for now have maintain rising VFR cigs ahead of a cold front overnight Monday night. Water vapor imagery shows a strong upper trough moving into the western U. As the upper trough continues east across the Plains during the day Monday, a dryline will slowly advance eastward into our western counties. In addition, a cold front will slide south and should be across northwest Oklahoma during the late afternoon. By late evening, as the cold front approaches North Texas, scattered showers and a few thunderstorms are likely to develop mainly along the front itself, where stronger mesoscale forcing along the boundary can break the cap.
/issued 322 PM CST Sun Mar 5 2017/ The leading edge of a slow moving, weak upper level trough and associated low level warm advection is causing some light rain over the western part of the forecast area. This pattern will continue through Monday and Monday night as the upper level trough moves slowly east.
1136 PM CST Sun Mar 5 2017 Aloft: SW flow will cont overhead thru tomorrow as a deep (-2 sigma) trof progresses thru the Wrn USA. This trof will be just W of the fcst area (FA) at 00Z/Tue. This low was along a strong cool front making its way thru the Wrn USA. The low will deepen further as it heads across the Dakota's into Srn Manitoba tomorrow. Aloft: Low amplitude WNW flow prevails thru next Sun in the wake of the trof that moves thru Mon eve. but overall average warmer than normal. Within the next few hours, there is a small chance of some MVFR ceilings moving into mainly KGRI, but the higher-res guidance is keeping the line east of KGRI.
but still expect late afternoon cape values around 1500-2000 J/kg to develop in the highly sheared environment.
422 AM EST Mon Mar 6 2017 High pressure along the coast will move offshore Today.
351 AM EST Mon Mar 6 2017 Increasing southerly winds will bring warmer air into the region with shower chances increasing by this afternoon.
1111 PM EST Sun Mar 5 2017 A ridge of high pressure will be over the North Country overnight, and will then move off the New England coast by early Monday afternoon. A warm front will approach the region Monday night.
215 AM EST Mon Mar 6 2017 High pressure over the area this morning will move offshore this afternoon.
1112 PM EST Sun Mar 5 2017 High pressure will continue to move off to the east this evening into tonight.
319 AM EST Mon Mar 6 2017 Current water vapor loop shows a synoptic pattern characterized by a long wave trough over the western half of the country. with ridging downstream of this feature and a weak southern stream perturbation "stuck" underneath the ridge across Alabama. with broad area of high pressure centered along Eastern Seaboard.
307 AM EST Mon Mar 6 2017 High pressure will build across the tonight.
1224 AM EST Mon Mar 6 2017 High pressure will build across the region overnight through Monday.
Sunday evening's surface and upper analyses showed a deep-layer ridge across much of the eastern CONUS. An upper-level short wave trough was over LA, but was dampening as it translated eastward, and there were only a few very light showers ahead of it. Any chance of light rain will end this morning once the short wave trough moves east of our area.
310 AM EST Mon Mar 6 2017 A warm southerly flow will strengthen across the area today, ahead of a cold front that will approach from the west.
605 AM CDT SAT APR 23 2016 An upper level ridge is currently building over the region early this morning and will be centered over the area by tonight. As an upper level trough tracks east into the northern Plains on Sunday the ridge will start to spread off Sunday night. Warm and dry conditions will occur through much of this weekend as highs warm into the upper 70s to the lower 80s both afternoons. As the upper level low tracks east storms are expected to develop to the west and northwest of the area along a cold front Sunday evening.
/ISSUED 348 AM CDT SAT APR 23 2016/ UPPER RIDGING WILL BE REPLACED WITH WEAKLY CYCLONIC SW FLOW TODAY WELL SOUTH OF AN UPPER LOW TRACKING FROM NORTHERN NEVADA TO WYOMING. SHALLOW MOISTURE ADVECTION ALREADY UNDERWAY OVER THE SOUTH PLAINS SHOULD LARGELY BE MAINTAINED IN BREEZY SRLY WINDS EAST OF A LEE TROUGH IN NEW MEXICO. WARMER EML TEMPS SHOULD HINDER CHANCES FOR DEEP MOIST CONVECTION. HIGH CLOUDS MAY BRIEFLY TREND THICK BY THIS EVENING AS A SECOND UPPER LOW /PRESENTLY IN THE GULF OF CA/ REACHES THE BIG BEND REGION TONIGHT. TEMPERATURES SUNDAY AFTERNOON WILL BE 3 TO 5 DEGREES WARMER THAN TODAY THANKS TO ADDITIONAL DOWNSLOPE WARMING IN THE DRY SECTOR BEHIND THE DRYLINE.
100 PM EDT SAT APR 23 2016 DRY AIR ASSOCIATED WITH HIGH PRESSURE EXPANDING INTO THE EASTERN GREAT LAKES TODAY WILL SUSTAIN CLEAR SKIES BELOW 10K FT THROUGH THE TAF PERIOD. ISSUED 315 AM EDT SAT APR 23 2016 MODERATING TREND IS EXPECTED THROUGHOUT THE WEEKEND AS THE SLOW MOVING UPPER TROUGH/LOW OF THE PAST FEW DAYS IS PULLED INTO MAIN NORTHERN STREAM UPPER TROUGH CENTERED OVER EASTERN CANADA.
912 AM PDT SAT APR 23 2016 Dry and a little warmer today.
THE 08-10 UTC HRRR ITERATIONS AND 06 UTC NAM NEST SUGGEST ADDITIONAL ISOLATED TO SCATTERED ELEVATED CONVECTION THIS MORNING SOUTHWEST AND SOUTH CENTRAL IN THE VICINITY OF THE SURFACE WARM FRONT. ISOLATED TO SCATTERED RAIN SHOWERS ARE POSSIBLE ACROSS THE SOUTH CENTRAL AND UPPER JAMES RIVER VALLEY IN THE VICINITY OF THE SURFACE WARM FRONT WHERE LOW LEVEL WARM AIR ADVECTION IS MAXIMIZED. AND AN ATTENDANT INCREASE IN PRECIPITATION CHANCES NORTH OF THE LOW INTO NORTH DAKOTA.
1230 PM EDT SAT APR 23 2016 HIGH PRESSURE OVER THE NORTHERN GREAT LAKES WILL SLIDE SOUTHEAST ACROSS THE LOCAL AREA TODAY AND TONIGHT. THE HIGH WILL MOVE OFF THE MID ATLANTIC COAST SUNDAY.
SOUTH WINDS WILL INCREASE THROUGH THE DAY TO THE EAST OF THE DEEPENING LEE SIDE SURFACE TROF ACROSS THE HIGH PLAINS. THE MAIN CLOSED LOW WILL EVOLVE EAST-NORTHEAST ACROSS THE NORTHERN PLAINS DURING SUNDAY AS A DRY-LINE AT THE SURFACE MOVES INTO CENTRAL KANSAS DURING THE AFTERNOON.
603 AM CDT SAT APR 23 2016 HIGH PRESSURE ON THE SURFACE AND ALOFT WILL DOMINATE THE WEATHER PATTERN OVER THE FOUR STATE REGION FOR THE REMAINDER OF THE WEEKEND RESULTING IN WARM DAYTIME TEMPERATURES AND MILD OVERNIGHT READINGS UNDER MOSTLY CLEAR SKIES UNTIL EARLY SUNDAY.
BRIEF AND MINOR RIDGING WILL MOVE ACROSS OUR AREA THIS MORNING BUT ANOTHER TROUGH WILL APPROACH THE COAST THIS AFTERNOON SPREADING CLOUDS AND SHOWERS EASTWARD TO THE CASCADES. THIS TROUGH WILL EVENTUALLY REACH INLAND ON EARLY SUNDAY WITH THE POTENTIAL FOR ISOLATED THUNDERSTORMS.
/ISSUED 603 AM CDT SAT APR 23 2016/ HIGH PRESSURE ON THE SURFACE AND ALOFT WILL DOMINATE THE WEATHER PATTERN OVER THE FOUR STATE REGION FOR THE REMAINDER OF THE WEEKEND RESULTING IN WARM DAYTIME TEMPERATURES AND MILD OVERNIGHT READINGS UNDER MOSTLY CLEAR SKIES UNTIL EARLY SUNDAY.
1053 AM CDT SAT APR 23 2016 SURFACE ANALYSIS AT 15Z HAS HIGH PRESSURE RIDGE OVER THE AREA AND THAT SHOULD BE MOVING EAST TODAY AND TONIGHT. TEMPERATURES HAVE INCREASED IN THE MID 70S WHICH IS A TOUCH WARMER THAN THE FORECAST. ONSHORE FLOW SETS UP TONIGHT AND SUNDAY AS THE HIGH MOVES OFF TO THE EAST. AND SURFACE WINDS STRENGTHEN IN RESPONSE TO DEVELOPING LOW PRESSURE IN/AROUND THE TEXAS PANHANDLE. HAVE LOW RAIN CHANCES FOR THE AREA ON SUNDAY AS THE MID/UPPER LEVEL LOW CURRENTLY CENTERED NEAR THE SOUTHERN BAJA PENINSULA WORKS ITS WAY EASTWARD ACROSS THE STATE.
WITH GUIDANCE GENERALLY ON THE COOL SIDE LATELY ALONG WITH THE WARMING TREND IN THE HOURLY TEMPS ALSO INDICATING A WARMER DAY. DRY DEEP LAYER AIR REMAINS OVER THE AREA THROUGH TONIGHT AS AN UPPER TROF OVER THE EXTREME EASTERN STATES MOVES OFF INTO THE WESTERN ATLANTIC FOLLOWED BY UPPER RIDGING BUILDING INTO THE REGION. HIGHS WILL BE MOSTLY IN THE LOWER 80S TODAY WITH LOWS TONIGHT RANGING FROM THE MID 50S INLAND TO AROUND 60 AT THE COAST.
ONSHORE FLOW SETS UP TONIGHT AND SUNDAY AS THE HIGH MOVES OFF TO THE EAST. AND SURFACE WINDS STRENGTHEN IN RESPONSE TO DEVELOPING LOW PRESSURE IN/AROUND THE TEXAS PANHANDLE. HAVE LOW RAIN CHANCES FOR THE AREA ON SUNDAY AS THE MID/UPPER LEVEL LOW CURRENTLY CENTERED NEAR THE SOUTHERN BAJA PENINSULA WORKS ITS WAY EASTWARD ACROSS THE STATE.
947 AM EDT SAT APR 23 2016 A COLD FRONT WILL CONTINUE TO PUSH THROUGH THE REGION EARLY THIS MORNING. HIGH PRESSURE WILL BUILD INTO THE REGION THIS WEEKEND.
WITH A LARGE-SCALE TROUGH TO THE NORTH OVER THE EASTERN CONTINENTAL UNITED STATES. A LENGTHY TROUGH WILL SHIFT EASTWARD OFF THE EASTERN SEABOARD THIS AFTERNOON. AN EXPANSIVE CONTINENTAL HIGH PRESSURE AREA WILL MOVE GRADUALLY FROM THE CENTRAL UNITED STATES TO THE WESTERN NORTH ATLANTIC.
The 7 am EDT regional surface analysis showed a weak cold front from Macon, GA through Destin, FL. Vapor imagery and upper air data showed a trough axis from VA through the FL Panhandle, with our region under the influence of dry, sinking air aloft. The low, shallow cloud field over our forecast area this morning will soon scatter out, and we expect highs this afternoon to be in the lower to mid 80s.
DRY CONDITIONS TODAY AS UPPER TROUGH AXIS MOVES OFFSHORE. STILL EXPECT AFTERNOON SUNSHINE PUSHING TEMPS UP INTO THE LOW 80S WITH MID 80S IN A FEW LOCATIONS. HIGH PRESSURE WILL BUILD NORTH OF THE REGION. HIGH PRESSURE WILL THEN SHIFT SLOWLY SOUTHEAST ACROSS THE WESTERN ATLANTIC THROUGH THE MIDDLE OF THE WEEK.
DRY DEEP LAYER AIR REMAINS OVER THE AREA THROUGH TONIGHT AS AN UPPER TROF OVER THE EXTREME EASTERN STATES MOVES OFF INTO THE WESTERN ATLANTIC FOLLOWED BY UPPER RIDGING BUILDING INTO THE REGION. HIGHS WILL BE MOSTLY IN THE LOWER 80S TODAY WITH LOWS TONIGHT RANGING FROM THE MID 50S INLAND TO AROUND 60 AT THE COAST.
623 AM CDT SAT APR 23 2016 FOR 12Z TAFS /ISSUED 548 AM CDT SAT APR 23 2016/ LATEST WATER VAPOR IMAGERY SUGGESTS A POSITIVELY-SHEARED 500-MB TROUGH CURRENTLY CROSSING THE SOUTHERN/CENTRAL APPALACHIANS. AS RIDGING ALOFT TRANSLATES EASTWARD DOWNSTREAM FROM A TROUGH TRACKING ACROSS THE GREAT BASIN AND INTO THE NORTHERN HIGH PLAINS. GUIDANCE INDICATES THE ONSET OF LIGHT SOUTHERLY RETURN FLOW BY LATE SUNDAY MORNING AS THE RIDGE AXIS SHIFTS EASTWARD INTO THE PIEDMONT REGION OF VA/NC/SC.
1231 PM EDT SAT APR 23 2016 HIGH PRESSURE WILL BUILD ACROSS THE AREA TODAY AND THEN MOVE OFF TO THE EAST ON SUNDAY.
1257 PM EDT SAT APR 23 2016 A RIDGE OF HIGH PRESSURE WILL MOVE ACROSS THE REGION THIS WEEKEND RESULTING IN MOSTLY CLEAR SKIES AND DRY WEATHER. HIGHS TODAY WILL BE IN THE LOWER TO MIDDLE 60S. SOUTHERLY WINDS BEHIND THE DEPARTING RIDGE WILL RESULT IN WARMER CONDITIONS SUNDAY WITH HIGHS IN THE 70S. COOLER AIR WAS ALSO SPREADING INTO FAR SOUTHWEST LOWER MICHIGAN INTO NORTHWEST OHIO.
Another warm afternoon with some increase in south wind expected as upper low currently in the Great Basin area moves northeast toward the plains.
QUIET WEATHER DAY WITH HIGH PRESSURE BUILDING IN. CHATTANOOGA AIRPORT, TN 76 51 80 59 / 0 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 70 50 79 57 / 0 0 0 0 OAK RIDGE, TN 71 50 80 57 / 0 0 0 0 TRI CITIES AIRPORT, TN 68 42 78 51 / 10 0 0 0.
TEMPERATURES WILL BE ON A DOWNHILL TREND THIS WEEKEND AS THE FIRST OF THREE LOW PRESSURE SYSTEMS MOVES THROUGH THE REGION TODAY.
907 AM EDT SAT APR 23 2016 A COLD FRONT WILL MOVE ACROSS THE AREA THIS MORNING.
LATEST MODELS CONTINUE TO SHOW A DECREASE IN THE WIDESPREAD PRECIP THIS AFTERNOON AS THE MID/UPPER LEVEL LOW SHIFTS EAST. SHOWERS WILL PERSIST GENERALLY IN THE HIGHER TERRAIN OF SW IDAHO THROUGH LATE THIS AFTERNOON. SHOWERS SPREADING ACROSS SOUTHEAST OREGON IN THE MORNING AND SOUTHWEST IDAHO IN THE AFTERNOON FOLLOWING A COLD FRONT. WIDESPREAD SHOWERS WILL CONTINUE THROUGH LATE AFTERNOON ON THE BACK SIDE OF THE EXITING LOW PRESSURE SYSTEM MAINLY ACROSS SOUTHWEST IDAHO. ANOTHER UPPER LEVEL LOW PRESSURE SYSTEM APPROACHING THE PACIFIC NORTHWEST COAST WILL INITIATE SHOWERS ACROSS THE FORECAST AREA SUNDAY AFTERNOON.
/issued 422 AM CDT SAT APR 23 2016/ (Tonight and Saturday) Latest UA Analysis shows a weak ridge over west and central Texas, with an upper low entering the northern California coast, and a weaker low over Baja California. Highs will generally warm into the low to mid 80s with plenty of sun.
/ISSUED 306 AM CDT SAT APR 23 2016/ SUBSIDENCE FROM AN UPPER LEVEL RIDGE WILL PROVIDE NICE WEATHER ACROSS NORTH AND CENTRAL TEXAS TODAY WITH MOSTLY SUNNY SKIES AND HIGH TEMPERATURES AROUND 80 DEGREES.
606 AM CDT SAT APR 23 2016 High pressure centered to our north today will bring pleasant weather conditions to most of the area. As a result, with the cloud cover expected to hold on into at least the early afternoon hours, temperatures will be tapered back a bit from guidance with the cooler afternoon highs (mid to upper 60s) over the east and especially far southeast counties. while out west, with full sunshine, we look for afternoon highs in the low to possibly mid 70s. 500mb ridge building into the Midwest for the first part of the weekend will keep the mild weather in place through tonight and into tomorrow for Central Illinois.
LAKESHORE AREAS WILL STILL BE COOLER TODAY DUE TO THE ONSHORE WINDS. THE HIGH WILL SHIFT EWD TODAY WITH LOW TO MID LEVEL WARM ADVECTION BEGINNING BY LATE AFTERNOON. MOIST ADVECTION INCREASES AS LOW PRESSURE MOVES INTO SD WITH THE WARM FRONT EXTENDING EWD TO SRN WI OR NRN IL BY 12Z SUN.
1247 PM EDT SAT APR 23 2016 HIGH PRESSURE WILL BUILD OVER THE AREA THIS WEEKEND, SETTING US UP FOR SUNNY BUT SEASONABLY COOL WEATHER.
729 AM EDT SAT APR 23 2016 HIGH PRESSURE WILL BUILD OVER THE AREA THIS WEEKEND, SETTING US UP FOR SUNNY BUT SEASONABLY COOL WEATHER.
756 AM EDT SAT APR 23 2016 A COLD FRONT WILL CONTINUE TO PUSH THROUGH THE REGION EARLY THIS MORNING. HIGH PRESSURE WILL BUILD INTO THE REGION THIS WEEKEND.
952 AM EDT SAT APR 23 2016 HIGH PRESSURE WILL BUILD OVER THE AREA THIS WEEKEND, SETTING US UP FOR SUNNY BUT SEASONABLY COOL WEATHER.
736 AM EDT SAT APR 23 2016 RADAR CONTINUES TO SHOW LIGHT RETURNS ACROSS THE HIGHER TERRAIN WHERE LOW LEVELS REMAIN SATURATED BENEATH A LOW STRATUS DECK. UPPER TROUGH CURRENTLY PUSHING EAST ACROSS WEST VIRGINIA WILL BRING DEEP LAYER SUBSIDENCE TO EASTERN KENTUCKY.
ANY FOG AND LOW CLOUDS WILL ERODE QUICKLY AFTER SUNRISE WITH DRY HIGH PRESSURE TAKING OVER FOR THE REST OF THE WEEKEND. SUNDAY WILL BE A LITTLE WARMER WITH SOUTHERLY FLOW DEVELOPING. HIGHS MOSTLY IN THE LOWER 80S. AN UPPER RIDGE WILL PERSIST OVER THE GULF COAST REGION.
SHOWERS WILL INCREASE LATER THIS AFTERNOON OR EVENING AS A COLD UPPER TROUGH NEARS THE AREA. THE TROUGH WILL MOVE OVER WESTERN WASHINGTON ON SUNDAY WITH SHOWERS AND COOL WEATHER.
DEEPENING TROF TO ITS BASE WILL CREATE STRENGTHENING SOUTHWEST FLOW ACROSS PANHANDLES TODAY AND TONIGHT. DYNAMICS AND COLD AIR FROM TROF WILL SUPPORT ISOLATED THUNDERSTORMS THIS AFTERNOON AND TONIGHT.
1048 AM CDT SAT APR 23 2016 BEAUTIFUL SATURDAY ACROSS THE FOUR STATE REGION WITH SFC RIDGING WELL IN CONTROL OF OUR WEATHER. WINDS ARE LIGHT UNDER THE RIDGE WE SHOULD BEGIN TO SEE A SLIGHT SOUTHEAST COMPONENT TO THE WIND BEGIN ACROSS OUR WESTERN ZONES.
1041 AM EDT SAT APR 23 2016 THE UPPER LEVEL TROUGH AXIS CONTINUES TO SHIFT OFF TO THE EAST. GIVEN THE LOW LEVEL NORTH TO NORTHEAST FLOW AND MAINLY NEUTRAL ADVECTION AT 850 MB. TEMPERATURES ARE ALSO RUNNING A BIT COOLER. SO HAVE LOWERED THE HIGHS SOMEWHAT. RADAR CONTINUES TO SHOW LIGHT RETURNS ACROSS THE HIGHER TERRAIN WHERE LOW LEVELS REMAIN SATURATED BENEATH A LOW STRATUS DECK. UPPER TROUGH CURRENTLY PUSHING EAST ACROSS WEST VIRGINIA WILL BRING DEEP LAYER SUBSIDENCE TO EASTERN KENTUCKY.
946 AM EDT SAT APR 23 2016 HIGH PRESSURE OVER THE NORTHERN GREAT LAKES WILL SLIDE SOUTHEAST ACROSS THE LOCAL AREA TODAY AND TONIGHT. THE HIGH WILL MOVE OFF THE MID ATLANTIC COAST SUNDAY.
306 AM EDT WED JUL 20 2016 High pressure builds over the area today, then passes offshore Thursday.
414 AM EDT WED JUL 20 2016 High pressure builds over the area today, then passes offshore Thursday.
446 AM EDT WED JUL 20 2016 High pressure over the eastern Great Lakes will build southeast across Pennsylvania today, then off the Mid Atlantic coast by late week.
The low to middle level warm advection pattern will remain weak today and tonight as the better focus is to the west and north. This boosts the heat index values into the lower 90s away from Lake MI where a lake breeze will be prevalent. The bubble of hot air over the Plains will expand into WI on Thursday, ushered in by the low level jet. 925mb temps will be 28 to 29C over central WI by Thu afternoon which will yield max temps in the lower to mid 90s, depending on if we mix all the way up to 925mb. Dewpoint temperatures should be in the lower to possibly mid 70s Thu afternoon, so heat index values are expected in the 100 to 110 degree range.
/issued 321 AM CDT WED JUL 20 2016/ A mid and upper level ridge, centered over Oklahoma, will be the main weather feature over the next several days.
An offshore upper low will move slowly toward Western Washington through Thursday for partly sunny skies and a chance of showers, mainly over the mountains during the afternoon and evening hours.
432 AM EDT WED JUL 20 2016 High pressure in control will bring dry and warm afternoons through Thursday with comfortable humidity.
250 AM CDT WED JUL 20 2016 As has been advertised at least for the past few days, anticipating very hot and humid conditions to prevail beginning today and extending through at least the weekend due to expansive anticyclone. This ridge axis (anticyclone) is centered over the central/southern plains expanding east over the Southeast. Meanwhile, a pair of troughs are on either side of the ridge on both North America seaboards. As the stronger subsidence from the ridge continues to affect the Southeast on Thursday, temperatures and dewpoints will likely be warmer than Wednesday.
103 AM EDT WED JUL 20 2016 High pressure should maintain dry and increasingly hot weather through Thursday. High pressure should maintain dry weather though Thursday.
Little temperature change today but several degrees warmer ahead of a cold front on Thursday when highs will be around 100F in the Treasure Valley. Winds will be generally light, except gusty pre-frontal winds to 30 mph will develop in Southeast Oregon ahead of a cold front Thursday afternoon.
High pressure will develop in the southwest flow on Thursday, warming daytime temperatures to the 90-100 degree range for most low to mid elevation valleys.
356 AM EDT WED JUL 20 2016 Humidity will gradually increase today as high pressure moves away from the area and southerly winds develop.
Upper level high pressure builds over central U. Weak disturbances could drop southeast around ridge. High pressure will dominate today and tonight. much drier air that has worked into the area with the high pressure will keep humidity levels down today. after early morning river valley fog due to favorable radiational cooling under the high pressure. Upper ridge continues to strengthen and build eastward at the start of the period.
339 AM EDT WED JUL 20 2016 High pressure will extend across the Ohio Valley and mid-Atlantic states today, with warm and generally dry conditions expected.
325 AM EDT WED JUL 20 2016 High pressure will build in from the west before settling offshore to the south of New England today. The high will then hold to the south of New England on Thursday. A warm front will approach from the southwest Thursday night, with warm and humid conditions settling in for the weekend.
Slightly cooler than normal temperatures remain on track through Thursday as onshore flow persists over the region.
132 AM EDT WED JUL 20 2016 High pressure over the Central Lakes will drift East and move off the East coast late Wednesday. allowing a warm front to lift NE across the area Thursday.
355 AM CDT WED JUL 20 2016 Late night sfc analysis shows high pressure centered over the sern CONUS maintaining a light onshore low-level flow over the forecast area this morning. Water vapor imagery continues to show mid/upper-level ridging across the cntl CONUS with the ridge axis in place from nrn TX through the Plains States. Short-range high-res models painting a little better POPs over the nern zones by afternoon which seems fair given less capping from ridging aloft to our west. Temps today will nudge upward with slight warming aloft progged in association with the ridging. Thursday looks to be something of a repeat of today with ridge axis hanging to our west.
154 AM EDT WED JUL 20 2016 High pressure over the Great Lakes will provide fair weather overnight.
237 AM MDT WED JUL 20 2016 Early afternoon WV imagery and RAP upper level analysis show large scale ridge centered over the plains dominating the pattern across the US. Moist monsoonal plume is wrapping around the western extent of ridge into the Rockies. At the surface; low pressure is in place across eastern Colorado with a trough axis extending from northeast Colorado and across northern Kansas. Regarding temperatures/heat indices: Air mass aloft is only expected to become warmer and consensus shows highs 2-4F warmer than today.
Ridge axis of high pressure over the west Atlantic remains north of the area today with an easterly flow persisting across central Florida. Strong mid-level anticyclone remains across central U. with trough offshore Atlantic coast to just offshore FL. Low level ridge meanders across northern peninsula. GFS/ECMWF consistent with general pattern of area of lower moisture moving across northern CWA over the weekend as ridge redevelops and drops southward. Strong anticyclone builds over western Atlantic with ridge axis extending west toward northernmost peninsula.
1106 PM MDT TUE JUL 19 2016 In the large scale, an upper Low is spinning off the Washington- Oregon coast and the subtropical High is on the southern plains.
1113 PM MDT TUE JUL 19 2016 Tonight the upper level ridge wl be centered over nern OK and should move little on Wed. This wl leave the forecast area of the west side of the upper ridge and wl allow the stream of mstr from the south to continue ovr wrn CO. Scattered showers/tstms can be expected to continue over and nr the higher terrain thru the evening hours, with probably some isold activity along the I-25 corridor, and little chance for pcpn ovr the far sern plains. High temps on Wed should generally be around normal in the high valleys, with readings in the 90's to lower 100's acrs the sern plains. Cooler by the Weekend.
The lowest conditions would most likely develop at TRI again this morning with LIFR category weather.