Aikyam-Lab/Synoptic-Bench huggingface dataset:
Mid-level water vapor imagery shows a well-defined upper low s of the Big Bend. E of the mid-level low there is even richer mstr that is being pulled into the Lower Trans Pecos and Big Bend and as such there is possibility of heavy rain in those areas this afternoon/evening. The aforementioned -SHRA have developed within a secondary mid-level theta-e ridge axis as they move se-nw. Precip coverage will wane on Thu as high aloft settles across the area and will mostly be tied to mtns in closer proximity to mid- level theta-e ridge.
The highest precipitation chances (20-30%) will be along and south of the I-80 corridor before sunset. Tomorrow through the rest of the week, seasonable temperatures and dry conditions are expected to persist as a high amplitude ridge builds in from the northwest. Though there is considerable uncertainty regarding timing and intensity of these upper level features, they should act to deamplify the blocking ridge centered over the western CONUS.
410 PM EDT Wed Jun 30 2021 Showers and thunderstorms are forecast to develop this evening and continue through Thursday as a cold front travels from the Great Lakes to the Ohio Valley.
238 PM CDT Wed Jun 30 2021 Next in series of mid level troughs working into the western Great Lakes this afternoon. Meanwhile another short wave trough follows the first dropping into the region early Thursday. Could also be a few degrees cooler than Wednesday with weak cold air advection with wave passage. A high- amplitude trough will dig its way into the eastern part of the Great Lakes region from the north, putting our region in an area of broad subsidence.
A cold front will start to push southward into the area Thursday, bringing a decrease in showers and thunderstorms after it moves through, as well as cooler and drier conditions.
Made some minor updates to this morning's low temperatures and max relative humidity mainly over the parts of Northcentral MT that remained slightly warmer and had slightly better relative humidity recovery overnight.
A few lingering storms will be possible Thursday but mainly favoring the higher terrain in eastern Mohave county and the Great Basin.
Should see a lull for a few hours late this evening into early tonight before the upper trough and surface cold front move in late tonight into Thursday.
Some patchy fog is being advertised on some of the high-res guidance across the northern half of Central Alabama within river and valley locations. The day on Thursday will finally feature a change in the weather pattern as the deep longwave trough dives southward, sending a surface cold front in our direction.
Moisture and instability already present throughout the area will lead to isolated showers and thunderstorms (except scattered in Harney County and in central Idaho) over the higher elevations this afternoon, accompanied by gusty outflow winds. The Excessive Heat Warning and Heat Advisory will also remain in effect today, except for the higher elevations in southwest Idaho where it will not be as hot.
256 PM CDT Wed Jun 30 2021 Tonight we will remain under the influence of a very weak trough extending west-southwest from a more prominent upper level trough over eastern Canada. Aside from our diurnal cumulus, which should again dissipate toward sunset, the weak upper level trough will have little impact on our weather tonight, with mostly clear skies and light winds again expected. Thursday through Thursday night, the aforementioned weak trough drifts southward, while an upper level ridge becomes the dominant feature across the northern Plains.
Humidity will drop into the low to mid teens along the northern boarder of our CWA to the low 20s in the far southeastern corner of Montana. Ridging will continue push into Montana allowing temperatures to rise. Normal for this time of year is near the low to mid 50s.
A drier high pressure area will build southward into the area starting later in the day Thursday, pushing the high precipitable water air mass southward.
A weak upper ridge centered across north-central Texas will continue to expand and build into the region today. Expect afternoon highs today in the lower 90s areawide. As has been the case for the past few nights, mild temperatures will continue to prevail overnight, with lows ranging from the lower to mid 70s across the region. By Thursday morning, upper-air pattern will feature a ridge across the central CONUS, with troughing across the northwest CONUS.
1228 PM EDT Wed Jun 30 2021 High pressure will continue over the area from the Atlantic through today.
An upper level low pressure system will move through the Pacific Northwest and bring a mix of rain and snow to the Rockies this morning and spread east during the day.
/ISSUED 359 AM CDT MON MAR 23 2015/ UPPER CONVERGENCE BEHIND A DEPARTING UPPER TROUGH HAS LEFT WEAK RIDGING IN ITS WAKE OVER THE AREA. CONVERGENCE ALOFT AND WEAK NEAR SURFACE RIDGING WILL LEAD TO LIGHT EAST WINDS. HIGH TEMPERATURES WILL STRETCH INTO THE LOWER 80S NEAR THE BEACH TO UPPER 80S INLAND.
A BUILDING RIDGE WILL BRING A QUICK WARMING AND DRYING TREND FOR THE SECOND HALF OF THE WEEK. A FAIRLY STRONG NEGATIVELY TILTED TROUGH IS BRINGING FAIRLY WIDESPREAD SHOWERS TO THE AREA THIS MORNING. BUT THE BEST INSTABILITY HAS MOVED OFF TO THE NORTHEAST WITH THE MAIN PORTION OF THE TROUGH. LATE THIS MORNING AND EARLY AFTERNOON AS THE TROUGH PULLS OUT OF THE AREA SHOWERS WILL BECOME ISOLATED. LATE THIS AFTERNOON A WARM FRONT WILL BRING MORE WIDESPREAD RAIN TO DEL NORTE COUNTY. BUT TRENDED THE FORECAST UP TOWARDS THE HIGHER MODELS USING THE WPC QPF GRIDS. RAIN START TO TAPER OFF TUESDAY AFTERNOON WITH MOST AREAS DRY BY TUESDAY NIGHT AS THE RIDGE BUILDS INTO THE AREA.
AS MODELS DEVELOP A WEAK AREA OF LOW PRESSURE ALONG IT IN NORTHERN GEORGIA. SINCE THE 5H TROF AXIS IS STILL ALONG THE MS RIVER. BY THE AFTN THE 5H TROF WILL BE EAST OF THE TN VALLEY AS HIGH PRESSURE BEGINS TO BUILD ACROSS THE AREA. ALL OF TUESDAY SHOULD BE DRY THANKS TO WEAK RIDGING. AFTN TEMPS WILL WARM INTO THE LOWER 70S. OVERNIGHT LOWS WILL BE IN THE LOW/MID 50S AS WINDS/CLOUDS BEGIN TO INCREASE FROM THE SE TUESDAY NIGHT.
WEAK RIDGING AT 700 MB WILL KEEP ANY CHANCES FOR PRECIP OUT OF THE CWA UNTIL THE AFTERNOON HRS. THE PASSAGE OF THE UPPER TROUGH THRU THE REGION DURING THE MORNING HRS WILL USHER IN ANOTHER ROUND OF LOW RH VALUES. CONDITIONS EXPECTED TO IMPROVE OVERNIGHT AS TROUGH SHIFTS EAST. AND WILL BRING A ROUND OF COOLER AIR TO THE TRI STATE REGION.
AN AREA OF PRECIPITATION IS STILL SHOWN ON RADAR OVER THE BLUE MOUNTAINS AND FOOTHILLS NORTH ACROSS THE LOWER COLUMBIA BASIN. A NORTHWEST FLOW WILL DEVELOP BY TUESDAY AFTERNOON AND EVENING AND BRING A WARM FRONT NORTHWARD ACROSS THE CWA TUESDAY NIGHT.
FAIRLY NEUTRAL ADVECTION FROM THE EAST OF 850 MB TEMPERATURES BETWEEN 6 AND 10 DEGREES SHOULD ALSO HELP TO KEEP HIGH TEMPERATURES COOLER IN GENERAL THAN NORMAL. AS MODELS DEVELOP A WEAK AREA OF LOW PRESSURE ALONG IT IN NORTHERN GEORGIA.
WHAT REMAINS OF THE LOW STRATUS AND FOG BY THAT TIME WILL DISSIPATE THROUGH THE MID MORNING HOURS AND TERMINALS WILL GO VFR TO SKC THROUGH THE AFTERNOON AND EVENING. LOW CONFIDENCE EXISTS IF A LOWER MVFR CEILING IS POSSIBLE TOMORROW MORNING GIVEN DEWPOINT DEPRESSION SPREADS IN THE LOWEST 5000 FT.
1009 AM EDT MON MAR 23 2015 A LOW PRESSURE OVER NORTHERN FLORIDA WILL MOVE EAST ALONG A STALLED FRONTAL BOUNDARY AS HIGH PRESSURE CENTERED OVER EASTERN CANADA RIDGES INTO THE CAROLINAS.
800 AM EDT MON MAR 23 2015 SURFACE FLOW SHOULD BE GENERALLY SOUTHWEST THROUGH THE DAY AS A COLD FRONT APPROACHES FROM THE WEST. BUT JUST ALONG THE IMMEDIATE COAST IF THE WINDS BECOME SOUTHEASTERLY THEN THE LOW LEVEL WIND PROFILE MIGHT SUPPORT A SHORT LIVED FUNNEL CLOUD BUT CONFIDENCE IS LOW.
A BUILDING RIDGE WILL BRING A QUICK WARMING AND DRYING TREND FOR THE SECOND HAVE OF THE WEEK. A FAIRLY STRONG NEGATIVELY TILTED TROUGH IS BRINGING FAIRLY WIDESPREAD SHOWERS TO THE AREA THIS MORNING. BUT THE BEST INSTABILITY HAS MOVED OFF TO THE NORTHEAST WITH THE MAIN PORTION OF THE TROUGH. LATE THIS MORNING AND EARLY AFTERNOON AS THE TROUGH PULLS OUT OF THE AREA SHOWERS WILL BECOME ISOLATED. LATE THIS AFTERNOON A WARM FRONT WILL BRING MORE WIDESPREAD RAIN TO DEL NORTE COUNTY. BUT TRENDED THE FORECAST UP TOWARDS THE HIGHER MODELS USING THE WPC QPF GRIDS. RAIN START TO TAPER OFF TUESDAY AFTERNOON WITH MOST AREAS DRY BY TUESDAY NIGHT AS THE RIDGE BUILDS INTO THE AREA.
ISSUED BY NATIONAL WEATHER SERVICE LOS ANGELES/OXNARD CA 940 AM PDT MON MAR 23 2015 COOLER CONDITIONS TODAY WITH PATCHY LOW CLOUDS AND GUSTY WEST WINDS OVER THE MOUNTAINS AND DESERTS.
SOUTHWEST TO WESTERLY WINDS WILL INCREASE THIS AFTERNOON IN RESPONSE TO A DEEPENING SURFACE CYCLONE. /ISSUED 423 AM CDT MON MAR 23 2015/ SHORT WAVE TROUGHING MOVING ACROSS THE ROCKIES TODAY WILL BEEF UP SURFACE LEE TROUGHING.
1106 AM EDT MON MAR 23 2015 ANOTHER PERIOD OF LAKE EFFECT SNOW SHOWERS WILL BE POSSIBLE THIS MORNING, BEFORE HIGH PRESSURE TAKES CONTROL OF THE REGION THROUGH TUESDAY AFTERNOON, WITH COLDER THAN NORMAL TEMPERATURES AND MOSTLY CLEAR SKIES. HIGH PRESSURE WILL SOON BUILD OVER THE REGION AND FINALLY DOMINATE THE WEATHER FOR A WHILE. TEMPERATURES THIS AFTERNOON ARE EXPECTED TO RANGE FROM THE LOW 20S OVER ONEIDA COUNTY TO THE LOW 30S OVER NORTHEAST PA.
1222 PM EDT MON MAR 23 2015 A LOW PRESSURE OVER NORTHERN FLORIDA WILL MOVE EAST ALONG A STALLED FRONTAL BOUNDARY AS HIGH PRESSURE CENTERED OVER EASTERN CANADA RIDGES INTO THE CAROLINAS.
A COLD FRONT WHICH HAS MOVED SOUTH OF KDHT AND KGUY IS EXPECTED TO STALL OUT SOMEWHERE NEAR KAMA THIS MORNING. BEFORE RETREATING NORTHWARD AS A WARM FRONT THIS AFTERNOON. VERY WARM CONDITIONS EXPECTED TODAY IN SPITE OF WEAK COLD FRONT MAKING ITS WAY INTO NORTHERN SECTIONS THIS MORNING. STRONGER COLD FRONT ON TUESDAY WILL RESULT IN SLIGHTLY COOLER CONDITIONS THAN THOSE OF TODAY.
AS HIGH PRESSURE REMAINS ANCHORED OVER THE DESERT SOUTHWEST. A WEAK LOW PRESSURE SYSTEM MAY BRING SOME CLOUDS AND SLIGHTLY COOLER TEMPERATURES DURING THE MIDWEEK PERIOD. THIS CLOUD COVER SHOULD AID IN KEEPING OVERNIGHT TEMPS ON THE WARMER SIDE BY A FEW DEGREES.
734 AM EDT MON MAR 23 2015 A LARGE AREA OF HIGH PRESSURE WILL BUILD SOUTHEAST ACROSS THE GREAT LAKES.
AN UPPER LEVEL TROUGH WILL MOVE ACROSS THE AREA BRINGING SHOWERS AND A CHANCE OF THUNDERSTORMS TODAY AND TONIGHT.
618 AM CDT MON MAR 23 2015 THE UPPER LEVEL TROUGH OF LOW PRESSURE THAT HELPED PROVIDE THE AREA WITH RAIN HAS SHIFTED EAST OF THE AREA AND RIDGING ALOFT AND ON THE SURFACE WILL MOVE INTO THE REGION. EXPECT THE RIDGE ALOFT TO FLATTEN AS A SERIES OF SHORT WAVES MOVE THROUGH THE FLOW PROVIDING A NEARLY ZONAL FLOW. A WEAK COLD FRONT WILL MOVE CLOSE TO THE AREA BUT WILL NOT MOVE THROUGH AND AFFECT MAINLY NORTHERN SECTIONS.
A WEAK AREA OF LOW PRESSURE IS CENTERED JUST SOUTH OF THE FLORIDA PANHANDLE. WITH COOL NORTHERLY FLOW NORTH OF THE LOW, EXPECT LOW CLOUDINESS TO PERSIST MUCH OF THE DAY IN GEORGIA AND ALABAMA WITH THE SOUTHERN EDGE LOCATED ACROSS THE FLORIDA PANHANDLE AND BIG BEND. ENOUGH DAYTIME HEATING MAY NEAR THE EDGE OF THE LOW CLOUDS FOR SCATTERED SHOWERS AND THUNDERSTORMS TO DEVELOP ACROSS THAT AREA THIS AFTERNOON, BUT ELSEWHERE THE RAIN HAS COME TO AN END.
THE UPPER LOW JUST NORTH OF THE INTERNATIONAL BORDER WILL CONTINUE TO PROPAGATE SOUTHEAST TODAY. DO NOT EXPECT MUCH ACCUMULATION DURING THE AFTERNOON HOURS DUE TO A WARMER LOW LEVEL AIRMASS (COULD ALSO BE MORE A RAIN/SNOW MIX AFTER NOON).
WINDS ARE NORTHEAST THIS MORNING NEAR THE SFC UNDER AN 8 DEGREE F POST COLD FRONT INVERSION AT 030 FT. THE LOW LEVEL MOISTURE HAS BEEN PRODUCING PATCHY DRIZZLE ACROSS THE AREA THIS MORNING. WEAK FRONTAL ZONE DRAPED ACROSS THE NORTH GULF IS THEN EXPECTED TO DRIFT NORTHWARD AS A WARM FRONT TUESDAY WHICH MAY FOCUS SOME MARITIME MOISTURE FOR ISOLATED SHOWERS NEAR THE COAST DURING THE DAY TUESDAY.
SNOW SHOULD CONTINUE FOR AT LEAST A FEW MORE HOURS IN THAT AREA BEFORE THE UPPER LOW SLIDES TO THE SOUTHEAST. THE UPPER LOW JUST NORTH OF THE INTERNATIONAL BORDER WILL CONTINUE TO PROPAGATE SOUTHEAST TODAY. DO NOT EXPECT MUCH ACCUMULATION DURING THE AFTERNOON HOURS DUE TO A WARMER LOW LEVEL AIRMASS (COULD ALSO BE MORE A RAIN/SNOW MIX AFTER NOON).
THIS LOW WILL TRACK QUICKLY NORTHEAST TOWARDS THE GREAT LAKES ON TUESDAY SENDING A WARM FRONT NORTHWARD INTO OUR AREA DURING THE DAY. WE BEGIN WITH MORE OF A WARM FRONTAL BOUNDARY MOVING NE THROUGH THE REGION TUESDAY NIGHT.
QUIET WX THIS MORNING AS FIRST SHORT WAVE TROUGH EXITS OUR CWA TO THE EAST TAKING SHOWERS WITH IT. NEXT SHORT WAVE TROUGH AND MORE SHOWERS WILL COME INTO OREGON ZONES MID-MORNING AND IDAHO ZONES THIS AFTERNOON. CLEARING FROM WEST TO EAST IN ALL ZONES LATE TODAY AND THIS EVENING BEHIND THE SECOND UPPER TROUGH. NEXT PACIFIC TROUGH WILL SPREAD MORE SHOWERS INTO OREGON ZONES LATE TONIGHT AND IDAHO ZONES AFTER MIDNIGHT. COLD UPPER LEVEL TROUGH SWINGING THROUGH TODAY WILL BRING A THREAT OF AFTERNOON THUNDERSTORMS MAINLY ACROSS THE IDAHO MOUNTAINS BUT CAN/T RULE OUT A STORM OVER OREGON AFTER 10 AM PDT.
A COLD FRONT WILL CROSS NORTHERN AND CENTRAL UTAH TODAY. STRONG HIGH PRESSURE ALOFT WILL RETURN FOR THE LATTER HALF OF THE WEEK. WATER VAPOR LOOP SHOWS A NEGATIVELY TILTED TROUGH OVER THE PACIFIC NORTHWEST INTO THE EASTERN GREAT BASIN. A LOW AMPLITUDE TROF IS MOVING INTO THE GREAT BASIN EARLY THIS MORNING AND IS FORECAST TO CROSS THE CWA DURING THE DAY. THIS WAVE SENDS A COLD FRONT THRU NRN/CENTRAL UT TODAY PASSING SLC AROUND MID MORNING WITH A BAND OF PRECIP ACROSS THE NORTH. A SECOND SHORT WAVE SENDS A WARM FRONT THRU NRN UT TUE MORNING THEN A COLD FRONT THRU THE ENTIRE CWA TUE NIGHT. PRECIP WITH THE WARM FRONT WILL BE LIMITED TO AREAS MAINLY NORTH OF ABOUT I-80 AND ANY SUPPORT FOR SHOWERS ALONG THE COLD FRONT QUICKLY WANES ONCE IT REACHES CENTRAL UT.
UPPER TROUGH SLIDING SE OF THE AREA WITH UPPER FLOW BECOMING NORTHWEST.
1043 AM EDT MON MAR 23 2015 STRONG LOW PRESSURE WILL REMAIN NEAR LABRADOR THROUGH TODAY. HIGH PRESSURE WILL BUILD ACROSS THE REGION TODAY THROUGH TUESDAY.
HIGH PRESSURE OVER MISSOURI WILL MOVE EAST TODAY. /ISSUED 405 AM CDT MON MAR 23 2015/ SFC ANALYSIS AT 09Z HAS WEAK HIGH PRESSURE OVER THE ARKLATEX AND E TX. UPPER LEVEL ANALYSIS SHOWS A DEPARTING TROUGH OVER THE MID SOUTH WITH A WEAK RIDGE UPSTREAM MOVING OVER TX. A COUPLE OF SHORT WAVE TROUGHS WILL MOVE ACROSS THE NORTHERN TIER OF STATES THROUGH MID WEEK. BY THUR THE GFS/ECMWF/CMC DEVELOP AN AMPLIFIED PATTERN WITH RIDGING OVER CALIFORNIA AND A TROUGH FROM LAKE MICHIGAN TO THE S PLAINS. THIS PATTERN SUPPORTS A COLD FRONT APPROACHING THE AREA BY THU MORNING AND THEN OFF THE COAST DURING THE DAY.
A LOW PRESSURE TROUGH WILL PRODUCE SOME WINDY SOUTHWEST WINDS LATER THIS MORNING INTO THE EARLY EVENING HOURS.
651 AM CDT MON MAR 23 2015 THE REGION IS CURRENTLY SITUATED BETWEEN AN EXITING LOW PRESSURE SYSTEM OVER IOWA. AND AN APPROACHING LOW PRESSURE OVER SOUTHERN SASKATCHEWAN. HIRES MODELS SUGGEST THE LOW CLOUDS WILL REMAIN OVER THE AREA THROUGH MID MORNING BEFORE DISSIPATING. THE LOW PRESSURE SYSTEM OVER SOUTHERN SASKATCHEWAN WILL TRACK NORTHEAST OF THE REGION TODAY. THIS SYSTEM WILL BRING WARMER TEMPERATURES INTO THE WESTERN DAKOTAS WHERE HIGHS SHOULD CLIMB INTO THE 50S AND 60S. ALONG WITH COOLER TEMPERATURES ALOFT SHOULD RESULT IN HIGHS ONLY IN THE UPPER 30S TO THE LOWER 40S AT BEST. MODELS AGREE WELL WITH AN UPPER LEVEL TROUGH OF LOW PRESSURE SPREADING WARM AIR ADVECTION SHOWERS OVER THE WESTERN CWA TONIGHT.
1255 PM EDT MON MAR 23 2015 STRONG LOW PRESSURE WILL REMAIN NEAR LABRADOR THROUGH TODAY. HIGH PRESSURE WILL BUILD ACROSS THE REGION TODAY THROUGH TUESDAY.
1014 AM EDT MON MAR 23 2015 COLD FRONT APPROACHING CENTRAL AND SOUTHERN FLORIDA TODAY AND TONIGHT FROM THE GULF OF MEXICO, WITH UPPER WAVE AHEAD OF IT, MAY GENERATE SCATTERED SHOWERS ESPECIALLY ACROSS THE NORTHERN HALF OF THE CWA THIS AFTERNOON. /ISSUED 800 AM EDT MON MAR 23 2015/ SURFACE FLOW SHOULD BE GENERALLY SOUTHWEST THROUGH THE DAY AS A COLD FRONT APPROACHES FROM THE WEST. BUT JUST ALONG THE IMMEDIATE COAST IF THE WINDS BECOME SOUTHEASTERLY THEN THE LOW LEVEL WIND PROFILE MIGHT SUPPORT A SHORT LIVED FUNNEL CLOUD BUT CONFIDENCE IS LOW.
1048 AM MDT MON MAR 23 2015 WIND IS THE BIG CONCERN OVER THE NEXT 12 TO 24 HOURS AS THE PRESSURE GRADIENT TIGHTENS TODAY WITH A 70 KT JET ALOFT AHEAD OF AN APPROACHING COLD FRONT. MOISTURE WILL INCREASE TO 3 G/KG THIS AFTERNOON BUT CROSS SECTIONS SHOW MOISTURE STAYING MAINLY ABOVE 8000 FEET WHICH MAY BE INDICATIVE OF PRECIPITATION REMAINING HIGH-BASED AS THE COLD FRONT PASSES THIS EVENING.
THEN WARMER TEMPERATURES WILL PREVAIL THIS WEEKEND AS HIGH PRESSURE BUILDS OVER THE AREA. 23/12Z UPPER AIR PLOTS INDICATED TROUGHS NEAR THE PACIFIC NW COAST AND OVER NEW ENGLAND. AND A LOW AMPLITUDE RIDGE OVER THE CENTRAL CONUS PLAINS. HIGH PRESSURE ALOFT WILL STRENGTHEN NEAR THE WEST COAST THUR. THE UPPER HIGH IS THEN PROGGED TO EXPAND EWD OVER THE SWRN CONUS THIS WEEKEND. THE MAIN IMPACT FROM THE STRENGTHENING HIGH PRESSURE SYSTEM WILL BE TO INCREASE DAYTIME TEMPERATURES TO WELL ABOVE NORMAL VALUES THIS WEEKEND. THEN BUILDING HIGH PRESSURE ALOFT WILL PROVIDE WARMER TEMPERATURES THIS WEEKEND.
HIGH PRESSURE RETURNS BY THE END OF THE WEEK FOR MOSTLY CLEAR. CALMER AND WARMER CONDITIONS HEADING INTO THE WEEKEND. MORNING MOS GUIDANCE PRODUCTS SHOW TEMPERATURES A LITTLE COOLER TODAY THAN CURRENTLY FORECAST BUT ONLY BY A DEGREE OR TWO.
824 AM PDT Mon Mar 23 2015 Relatively cool and unsettled weather will continue today and Tuesday before strong high pressure rebuilds by mid-week bringing a return of very warm and dry conditions. Showers across the Sierra will continue to push east and taper off through this morning as cold front pushes out of the area. CEO Showers occurring along the slow moving cold front continue to push southeastward out of the forecast area early this morning while additional showers associated with the upper trough move across northwest California.
EXPECT BOUNDARY TO SHIFT SOUTH OVER NE FL THIS AFTERNOON AS LOW PRESSURE CONSOLIDATES AND DEVELOPS OVER THE ATLANTIC. HAVE LOWERED POPS OVER NORTHERN ZONES BUT STILL EXPECT SHOWERS TO DEVELOP THIS AFTERNOON AS UPPER TROUGH APPROACHES THE AREA FROM THE WEST. ADDITIONAL SCATTERED SHOWER DEVELOPMENT EXPECTED THIS AFTERNOON AS UPPER TROUGH PUSHES INTO THE AREA.
1006 AM EDT MON MAR 23 2015 THE SKY HAS CLEARED OFF RAPIDLY THIS MORNING AS A RIDGE OF HIGH PRESSURE TO THE SOUTHWEST WILL CONTINUE TO NUDGE ITS WAY INTO THE TENNESSEE VALLEY THIS AFTERNOON. CHATTANOOGA AIRPORT, TN 69 46 71 53 / 10 10 0 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 68 45 68 50 / 10 10 10 10 OAK RIDGE, TN 68 45 68 51 / 10 10 10 10 TRI CITIES AIRPORT, TN 64 41 65 45 / 10 10 10 10.
920 AM EDT MON MAR 23 2015 88D RETURNS SHOW BANDS OF SHOWERS AND A FEW STORMS MOVING INLAND FROM THE GULF ACROSS CENTRAL AND NORTHERN SECTIONS OF THE FORECAST AREA EARLY THIS MORNING ASSOCIATED WITH A PRE-FRONTAL TROUGH. 7 INCH RANGE) AND LIFT ASSOCIATED WITH A SHORT WAVE TROUGH OVER THE WESTERN FLORIDA PANHANDLE. WITH WINDS BECOMING NORTHWEST TO NORTH AFTER AFTER 02Z AS A COLD FRONT SINKS SOUTH THROUGH THE REGION. WINDS WILL REMAIN OUT OF THE SOUTHWEST AT 10 TO 15 KNOTS OUT AHEAD OF AN APPROACHING COLD FRONT. WINDS WILL SHIFT TO THE NORTHEAST BEHIND THIS FRONT AS HIGH PRESSURE TO THE NORTH BUILDS OVER THE AREA.
/ISSUED 352 AM CDT MON APR 6 2015/ AN AMPLIFYING UPPER TROUGH/LOW OFF THE OREGON COAST WILL KEEP SPLIT FLOW PATTERN ALOFT OVER THE WESTERN U. THE UPPER LOW WILL MOVE EAST TUESDAY AND ACROSS THE CENTRAL PLAINS BEFORE MERGING WITH A CANADIAN UPPER TROUGH OVER THE MIDWEST/EASTERN GREAT LAKES REGION LATE IN THE WEEK. DRY SOUTHWESTERLY FLOW ALOFT WILL AID LEE-SIDE TROUGHING TODAY AND TUESDAY.
744 AM EDT MON APR 6 2015 HIGH PRESSURE IS BUILDING TO THE NORTHEAST OF SOUTH FLORIDA. /ISSUED 359 AM EDT MON APR 6 2015/ MID LEVEL RIDGE WILL BE CENTERED OVER THE GULF EARLY THIS WEEK AND THEN AMPLIFY ALONG THE EASTERN SEABOARD IN THE MID WEEK PERIOD DUE TO AN UPPER TROUGH DIGGING INTO THE MIDDLE OF THE COUNTRY. HIGH PRESSURE OVER THE WESTERN ATLANTIC EAST OF THE MID ATLANTIC STATES WILL STRENGTHEN TODAY AS IT SHIFTS EASTWARD. A WEAK COASTAL TROUGH WILL PUSH WESTWARD THIS MORNING.
THIS MORNING HAD A MUCH WARMER START IN THE MID/UPPER 5OS. THEY WILL NEED TO OVERCOME THE LOW LEVEL DRY AIR THAT IS STILL IN PLACE IN NE AL. AS THE HIGH MOVES EAST.
ISSUED BY NATIONAL WEATHER SERVICE STATE COLLEGE PA 1121 AM EDT MON APR 6 2015 MOST OF TODAY WILL BE DRY AND MUCH WARMER.
100 PM EDT MON APR 6 2015 HIGH PRESSURE TO OUR EAST WILL MAINTAIN SUFFICIENT ATMOSPHERIC MOISTURE OVER OUR REGION THROUGH MUCH OF THIS WEEK.
/ISSUED 744 AM EDT MON APR 6 2015/ HIGH PRESSURE IS BUILDING TO THE NORTHEAST OF SOUTH FLORIDA. /ISSUED 359 AM EDT MON APR 6 2015/ MID LEVEL RIDGE WILL BE CENTERED OVER THE GULF EARLY THIS WEEK AND THEN AMPLIFY ALONG THE EASTERN SEABOARD IN THE MID WEEK PERIOD DUE TO AN UPPER TROUGH DIGGING INTO THE MIDDLE OF THE COUNTRY. HIGH PRESSURE OVER THE WESTERN ATLANTIC EAST OF THE MID ATLANTIC STATES WILL STRENGTHEN TODAY AS IT SHIFTS EASTWARD. A WEAK COASTAL TROUGH WILL PUSH WESTWARD THIS MORNING.
A COLD FRONT WILL SLOWLY ADVANCE SOUTHEAST ACROSS NORTHERN UTAH TODAY.
1007 AM EDT MON APR 6 2015 MOST OF TODAY WILL BE DRY AND MUCH WARMER.
A warmer air mass will start to spread into the area today as highs top out in the upper 60s to the middle 70s. Gusty southerly winds will usher these warmer temperatures into the area and will gust to around 30 mph at times mainly west of Highway 65 across southeastern Kansas and western Missouri. Late this evening into the overnight hours a weak upper level disturbance will track through the region and thunderstorms will be possible as instability increases with the warmer air mass and an increase in low level moisture. This disturbance will likely track closer to the warm front which will be north of the area but may clip portions of central Missouri. Lows will only cool into the 60s tonight as a warmer air mass continues to spread north.
Unsettled and cool conditions will persist through midweek then a drier and warmer pattern will return by the end of the week. Area webcams show heavy wet snow falling but across the lower valleys this is not sticking to roadways, just unpaved surfaces. The higher elevations are experiencing sluchy road surfaces. Moisture wrapping around this low pressure will promote widespread RA at all TAF sites with mainly MVFR Ceilings and Vis through 18Z.
816 AM EDT MON APR 6 2015 AN UNSETTLED WEATHER PATTERN WILL BEGIN TODAY NIGHT AS AREAS OF LOW PRESSURE INTERACT WITH THE A STALLED FRONTAL BOUNDARY.
EASTERLY WINDS WILL CONTINUE TODAY AS HIGH PRESSURE OVER THE WESTERN ATLANTIC RIDGES OVER THE FLORIDA PENINSULA. TEMPERATURES ARE WARMING UP NICELY THIS MORNING AND ARE ALREADY IN THE LOW TO MID 70S. HIGH PRESSURE IN THE WESTERN ATLANTIC WILL KEEP AN OVERALL EASTERLY WIND FLOW EXCEPT CLOSER TO THE COAST WHERE THE WINDS WILL TURN ONSHORE WITH AN AFTERNOON SEA BREEZE.
SHWRS WILL INCREASE IN COVERAGE THIS MORNING WITH A FEW TSTMS POSSIBLE AS AN UPPER LEVEL SHORT WAVE TROF TRACKS ACROSS THE AREA. IT WILL STILL TAKE SOME TIME FOR MOISTENING TO OCCUR IN THE LOWER LEVELS SO ONLY ISOLATED TO SCATTERED LIGHT RAIN SHOWERS ARE EXPECTED ACROSS CENTRAL ALABAMA THRU SUNRISE.
CHATTANOOGA AIRPORT, TN 69 60 79 62 / 80 80 60 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 69 58 77 59 / 90 80 60 20 OAK RIDGE, TN 67 59 77 59 / 90 80 60 20 TRI CITIES AIRPORT, TN 69 53 75 55 / 60 80 50 20.
1009 AM EDT MON APR 6 2015 AN EAST-WEST ORIENTED FRONT EXTENDING ACROSS THE LOWER GREAT LAKES WILL SLOWLY SAG SOUTH INTO THE AREA DURING THE FIRST HALF OF THE WEEK.
937 AM EDT MON APR 6 2015 AN UNSETTLED WEATHER PATTERN WILL BEGIN TODAY NIGHT AS AREAS OF LOW PRESSURE INTERACT WITH THE A STALLED FRONTAL BOUNDARY.
A COLD FRONT WILL SLOWLY ADVANCE EAST ACROSS NORTHERN UTAH TODAY.
INSTABILITY AND WEAK DYNAMICS FROM EXITING UPPER LOW WILL KEEP SHOWERS OVER THE EAST-CENTRAL OREGON AND WEST-CENTRAL IDAHO MTNS TODAY. AFTERNOON INSTABILITY WILL FEED ISOLATED SHOWERS OVER THE LOWER TREASURE VALLEY /ADA COUNTY TO THE ID-OR BORDER/.
SOUTHERLY WINDS WILL STRENGTHEN OVER THE NEXT SEVERAL HOURS AS A RESULT OF LEE SIDE TROFFING. SHOULD SEE A REPEAT OF DECKS DEVELOPING PRIOR TO OR AROUND MIDNIGHT LATER TONIGHT AS THE LOW LEVEL JET KICKS IN ONCE AGAIN.