Aikyam-Lab/Synoptic-Bench huggingface dataset:
1118 AM CDT WED JUL 22 2015 Another nice day in store across the region as temperatures will once again top out in the lower 80s and dewpoints in the 60s to near 70. Precipitation chances will increase this evening and overnight across the area as ridging begins to replace the quasi-zonal flow that has been in place across the central US. The low-level jet will be focused in western Kansas this evening, but will also pick up some behind a boundary in southern Missouri. As moisture begins pooling along with boundary and the low-level jet increases tonight, convection is expected to develop along this boundary and work its way northward into the CWA.
SHALLOW COLD FRONT, MARKED BY LIGHT NORTH WINDS, HAS MANAGED TO PUSH AS FAR SOUTH AS THE AL/TN LINE.
641 AM CDT WED JUL 22 2015 THE SHORT TERM WILL TRANSITION FROM WEAK HIGH PRESSURE AND DRIER CONDITIONS TO INCREASING MOISTURE AND SOUTHERLY FLOW. MUCH OF THE HIGH RESOLUTION CAMS WERE DOING A POOR JOB DEPICTING THE CURRENT SHOWERS/STORMS WITH THE OPERATIONAL MODELS DOING A BIT BETTER JOB. IT SHOULD BE EVEN WARMER THURSDAY WITH MOST AREAS SEEING HIGHS IN THE 80S.
815 AM MST WED JUL 22 2015 A DRIER SOUTHWESTERLY FLOW OVER THE REGION WILL BRING ONLY A FEW MOUNTAIN SHOWERS AND THUNDERSTORMS EACH DAY ACROSS THE HIGHER TERRAIN OF SOUTH-CENTRAL ARIZONA THIS WEEK. WITH HIGHS APPROACHING THE 110 DEGREE MARK FOR SOME LOCALES ON THE LOWER DESERTS BY THE WEEKEND. ONCE AGAIN INCREASING THE THREAT OF ISOLATED THUNDERSTORMS OVER THE LOWER DESERTS. LOW PRESSURE TROFFING ALONG THE WEST COAST HAS SET UP A RELATIVELY DRY SOUTHWEST FLOW ALOFT INTO SERN CA AND ARIZONA. THE MOISTURE WILL ALSO LEAD TO SLIGHT CHANCES OF SHOWERS/THUNDERSTORMS EACH DAY MAINLY OVER THE HIGHER TERRAIN EAST OF PHOENIX. AS THE LOW LEVEL FLOW/850-700MB GRADUALLY BECOMES MORE SOUTHERLY.
A BROAD UPPER LEVEL RIDGE STRETCHES EAST FROM THE SOUTHERN PLAINS TO THE WESTERN ATLANTIC. THE 12Z KKEY RAOB OBSERVATION CONTINUES TO SAMPLE DRY AIR WITHIN THE LOWER TROPOSPHERE (DPD AVERAGING 6 TO 10 DEGREES CELSIUS). LIGHT STEERING COMBINED WITH DRY AIR IN THE LOWER TROPOSPHERE WILL HAMPER THE ABILITY OF CUMULUS CONGESTUS ALONG THE ISLAND CHAIN. WITH HIGHS CLIMBING INTO THE LOWER 90S. A RIDGE AXIS WILL REMAIN NEAR THE COASTAL WATERS OF THE FLORIDA KEYS FOR MOST OF THIS WEEK. THE BAND OF SHOWERS IN THE VICINITY OF THE LOWER AND MIDDLE KEYS THIS MORNING SHOULD WEAKEN.
925 MB IS ABOUT 2 DEGREES ABOVE AVERAGE WHICH WILL MIX DOWN AND HELP SURFACE TEMPS REACH THE LOW 90S TODAY. THE AREA WILL CONTINUE TO SIT ON THE EASTERN PERIPHERY OF THE UPPER RIDGE OVER THE NEXT SEVERAL DAYS. THE UPPER HIGH WILL GET PRESSED BACK TOWARD THE WEST FOR A FEW DAYS BUT WILL MANAGE TO MOVE BACK OVER THE RED RIVER AREA BY THE END OF THE FCAST. THIS WILL ALLOW THE EAST COAST TROUGH TO WORK A COLD FRONT OFFSHORE. THIS WOULD HELP KEEP OUR AREA IN THE REGION OF SHORT WAVE DISTURBANCES ROTATING AROUND THE UPPER HIGH. THE LOW LEVEL JET WILL WEAKEN.
STILL NOT MUCH TO TALK ABOUT WITH THE SHORT TERM FORECAST AS HIGH PRESSURE REMAINS IN CONTROL.
1014 AM EDT WED JUL 22 2015 A COLD FRONT WILL MOVE THROUGH FROM THE NORTHWEST THIS MORNING. A WEAK LOW PRESSURE AREA WILL DEVELOP ALONG THE FRONT AND WILL PASS TO THE SOUTH THURSDAY.
1123 AM CDT WED JUL 22 2015 RIDGE OF HIGH PRESSURE CENTERED OVER THE ARKLATEX REGION TO CONTINUE TYPICAL HOT AND HUMID JULY WEATHER THROUGH THURSDAY.
603 AM CDT WED JUL 22 2015 HIGH PRESSURE CENTERED OVER THE MIDWEST EARLY THIS MORNING WILL DOMINATE THE WEATHER OVER MOST OF THE FORECAST AREA THRU THE DAY. IN THE MEANTIME, HIGH PRESSURE BUILDING BACK INTO THE REGION FOR THE SHORT TERM BRINGING A DRIER FORECAST AND A LESS MUGGY AIRMASS. BROAD UPPER RIDGE OVER THE SOUTHERN THIRD OF THE CONUS STARTING TO AMPLIFY A BIT TOWARDS THE END OF THE WEEK. MIDWEST GETTING INTO THE RIDGE WITH LITTLE FLOW ALOFT AS A QUICK IMPULSE RIPPLES OVER THE RIDGE AND DIVES INTO THE MID MISS RIVER VALLEY WED NIGHT AND INTO THURSDAY. AS THE UPPER RIDGE BUILDS ACROSS THE MIDDLE OF THE CONUS WITH THE AXIS DRIFTING OVER THE MIDWEST, TEMPS WARM INTO THE WEEKEND.
ISSUED BY NATIONAL WEATHER SERVICE CHARLESTON WV 1134 AM EDT WED JUL 22 2015 DRY WEATHER AND SEASONAL TEMPERATURES CAN BE EXPECTED INTO THE WEEKEND AS HIGH PRESSURE DOMINATES OVER THE UPPER OHIO REGION. WITH HIGH PRESSURE MOVING INTO THE REGION TODAY.
734 AM EDT WED JUL 22 2015 AN UPPER LEVEL LOW PRESSURE SYSTEM CENTERED ACROSS QUEBEC WILL RESULT IN SOMEWHAT COOLER TEMPERATURES THROUGH THE END OF THE WORK WEEK.
A WARM FRONT WILL CONTINUE TO LIFT NORTHEAST ACROSS THE STATE THIS MORNING. TEMPERATURES TODAY ARE EXPECTED TO BE A FEW DEGREES WARMER THAN YESTERDAY AS WAA CONTINUES AND WE BECOME FULLY ENTRENCHED IN THE WARM SECTOR.
UPPER LEVEL TROUGH IS ANCHORED OVER THE PAC NW THIS MORNING WITH A SIGNIFICANT SHORT WAVE TROUGH LOCATED OVER WASHINGTON AS OF 245 AM MDT. CLOUD COVER WILL MAKE THE HIGH TEMP FORECAST TRICKY. A SECOND SHORT WAVE TROUGH WILL DIG INTO WASHINGTON AND OREGON THU AFTERNOON. TEMPS WILL BE SLIGHTLY COOLER THU BEHIND THE WEAK COOL FRONT THAT WILL MOVE THROUGH TODAY.
WITH NORTHERN GULF CENTERED RIDGING PLACING SOUTHEASTERLY STEERING FLOW ACROSS THE REGION. AS SURFACE TEMPERATURES WARM INTO THE LOWER 90S BY NOON.
AN UPPER-LEVEL TROUGH OFF THE CENTRAL COAST WILL MOVE INLAND THIS EARLY TONIGHT AND SHIFT THE FLOW OUT OF THE SW. A SHORT WAVE TROUGH IS FORECAST TO DROP THROUGH THE PACIFIC NORTHWEST INTO CALIFORNIA THURSDAY. THE TROUGH WILL PROVIDE COOLER TEMPERATURES THROUGH THE END OF THE WORKWEEK FROM A DEEPER MARINE LAYER ALONG THE COAST AND A STRONGER ONSHORE WIND FLOW INTO THE INTERIOR OF CENTRAL CA.
1023 AM EDT WED JUL 22 2015 A COLD FRONT WILL MOVE EAST OF THE AREA TODAY.
1117 AM EDT WED JUL 22 2015 DRY HIGH PRESSURE FOR WEDNESDAY INTO THE WEEKEND. THERE IS A SHOT AT A NEAR 50 DEGREE LOW TEMP IN THE E RANDOLPH CO AND THE HIGHEST ELEVATIONS IN THE N MOUNTAINS.
631 AM CDT WED JUL 22 2015 HIGH PRESSURE SYSTEM WILL CONTINUE TO PUSH TO THE EAST THROUGHOUT THE DAY TODAY.
FOR THURSDAY INTO THE WEEKEND, THE UPPER LEVEL RIDGE BUILDS OVER THE SOUTHERN INTO THE CENTRAL PLAINS.
633 AM CDT WED JUL 22 2015 Another nice day in store across the region as temperatures will once again top out in the lower 80s and dewpoints in the 60s to near 70. Precipitation chances will increase this evening and overnight across the area as ridging begins to replace the quasi-zonal flow that has been in place across the central US. The low-level jet will be focused in western Kansas this evening, but will also pick up some behind a boundary in southern Missouri. As moisture begins pooling along with boundary and the low-level jet increases tonight, convection is expected to develop along this boundary and work its way northward into the CWA.
AS THE FRONTAL BOUNDARY DROPS SWD AND AN UPPER RIDGE PATTERN OUT W BEGINS TO EXPAND EWD. WITH LITTLE/NO RAIN XPCTED AS HIGH PRESSURE AT THE SFC STRENGTHENS ACROSS THE MID ATLANTIC STATES. AS THE UPPER RIDGE AXIS ONCE AGAIN RETREATS BACK TOWARD THE W.
A WEAK UPPER TROUGH WILL BRING CLOUDS AND A FEW LIGHT SHOWERS TO THE AREA TODAY.
AN UPPER LEVEL TROUGH WILL REMAIN OVER THE WESTERN U. THIS TROUGH'S AXIS WILL GRADUALLY SHIFT FROM JUST OFFSHORE TO AN EASTERN WASHINGTON TO NORTHERN CALIFORNIA LINE BY THURSDAY NIGHT.
636 AM CDT WED JUL 22 2015 WEAK HIGH PRESSURE IS RESULTING IN CALM WINDS AND MOSTLY CLEAR SKIES.
713 AM EDT TUE APR 12 2016 HIGH PRESSURE FROM THE UPPER MIDWEST WILL MOVE TO THE EASTERN GREAT LAKES BY WEDNESDAY. THE LONG WAVE TROUGH ALOFT WILL BE SLIDING EAST OF THE AREA THIS MORNING. GIVEN THE RIDGE AXIS BEING WELL TO THE NORTHWEST. DERIVING THE HIGH TEMPERATURE FROM THE FORECAST 850 MB TEMPS GAVE ME ONLY 40-45 AND UPSTREAM TEMPERATURES WERE IN THE 40S YESTERDAY SO THE HIGH TEMPERATURE FORECAST IS SHADED TOWARD THE LOWER GUIDANCE OR A LITTLE BELOW GUIDANCE. HIGHS IN THE LOWER/MID 50S INLAND AND MID/UPPER 40S NEAR LAKE ERIE.
620 AM CDT TUE APR 12 2016 LIGHT WINDS AND CLEAR SKIES HAVE ALLOWED TEMPERATURES TO FALL BELOW FREEZING IN MOST OF THE AREA EARLY THIS MORNING.
703 AM EDT TUE APR 12 2016 A COLD FRONT WILL MOVE THROUGH THE REGION LATE THIS AFTERNOON AND EVENING. HIGH PRESSURE WILL BUILD IN FROM THE NORTH LATE TONIGHT AND WEDNESDAY. LATEST SFC ANALYSIS SHOWS 1006MB LOW PRESSURE OVER SOUTHERN QUEBEC AND ATTENDANT COLD FRONT MOVING THROUGH THE MID-ATLANTIC AND APPALACHIANS THIS MORNING. THE COLD FRONT WILL CONTINUE TO PUSH THROUGH THE AREA THIS EVENING. HIGH PRESSURE TO THE NW WILL BUILD IN BEHIND THE FRONT.
905 AM MST TUE APR 12 2016 A LOW PRESSURE SYSTEM WILL BRING SHOWERS AND THUNDERSTORMS TO PORTIONS OF SOUTHERN GILA COUNTY TODAY. WHILE MOSTLY SUNNY SKIES WILL BE ON TAP FOR THE LOWER DESERTS OF SOUTHEAST CALIFORNIA AND SOUTH-CENTRAL ARIZONA.
It will take all night for high clouds to completely clear the PAH forecast area as a drier, cooler air mass sinks into the region on northerly winds.
BUT THE LOWEST RH'S TODAY WILL BE OVER THE E HALF OF THE FCST AREA. A RIDGE WAS OVER THE NRN ROCKIES WITH A TROF OVER THE GREAT LAKES. THE FLOW WILL BECOME PROGRESSIVE WITH THE RIDGE MOVING OVER THE NRN PLAINS BY 12Z/WED. THE TAIL END OF THIS TROF WILL MOVE THRU 00Z-06Z TONIGHT BUT WITH NO NOTICEABLE WX. THIS HIGH WILL MIGRATE TO THE GREAT LAKES BY 00Z AND THEN INTO THE ERN USA/CANADA BY 12Z/WED.
405 AM PDT TUE APR 12 2016 HIGH PRESSURE WILL KEEP THINGS DRY AND KICK OFF A WARMING TREND TODAY AND WEDNESDAY.
CURRENT FCST LOOKS ON TRACK WITH THE HIGHER/LIKELY POPS AFTER 00Z. MSAS ANALYSES DEPICT A COLD FRONT APPROACHING THE CWA FROM THE NORTH. IN ADVANCE OF AN UPPER LOW. OWING TO THE HIGH FLASH FLOOD GUIDANCE/ UNCERTAINTY REGARDING PSN OF THE FRONT EARLY WEDNESDAY/VERTICAL SHEAR.
1023 AM EDT TUE APR 12 2016 HIGH PRESSURE WILL BUILD OVER THE REGION LATER TODAY THROUGH THE END OF THE WEEK. A GUSTY NW WIND WILL MAKE IT FEEL EVEN COOLER. THINKING THAT LOWER TO MID 30S WILL BE LIKELY OVER THE LOWER SUSQ WHERE THE GROWING SEASON BEGAN APRIL 11. MINS SHOULD BE IN THE LOWER TO MID 20S NORTH AND MID TO UPPER 20S ACROSS THE REMAINDER OF THE LAUREL HIGHLANDS. BROAD TROFFING REMAINS OVER THE REGION TO BEGIN WEDNESDAY. AND A MOISTURE CHALLENGED UPPER TROF DROPS THROUGH THE SLIGHTLY CYCLONIC FLOW WEDNESDAY AFTERNOON AND NIGHT. THE UPPER LEVEL TROUGH WILL LIFT OFF TO THE EAST TUESDAY NIGHT. ANOTHER SHORT WAVE TROUGH WILL MOVE THROUGH THE REGION WEDNESDAY.
THE COLD FRONT THAT BROUGHT THE SHOWERS OVERNIGHT IS NOW WELL SOUTHEAST OF THE AREA AND AS OF 15Z THE CLEARING LINE IN THE CLOUDS IS THROUGH THE CORNER OF NW ALABAMA. WITH THE HIGH PRESSURE CENTERED OVER THE MIDWEST AND BUILDING SOUTH. COLD FRONT CONTINUES TO DRIFT SLOWLY SWD THRU NRN ALABAMA/SRN TENNESSEE THIS MORNING WITH NNE FLOW OF 5-10 KTS OBSERVED AT BOTH HSV/MSL.
630 AM CDT TUE APR 12 2016 317 AM CDT THE COOLER BY THE LAKE REGIME BEGINS TODAY AS EXTENSIVE HIGH PRESSURE WILL MOVE OVERHEAD THIS MORNING.
/ISSUED 345 AM CDT TUE APR 12 2016/ AN UPPER LOW OVER SOUTHERN AZ AND NORTHWESTERN MEXICO WILL MOVE EAST AND SHEAR OUT OVER NM LATER TODAY AND OVER TX TONIGHT AND WEDNESDAY.
1034 AM EDT TUE APR 12 2016 HIGH PRESSURE IS IN PLACE ACROSS THE AREA RIDGING IN FROM THE NE. A COLD FRONT WILL SETTLE SOUTH ACROSS THE DEEP SOUTH TODAY AND PUSH THE RIDGE TO THE SOUTH. HIGH PRESSURE RIDGING ACROSS THE AREA WILL SETTLE SOUTH THROUGH THE DAY AS A SLOW COLD FRONT SETTLES SOUTH THROUGH THE DEEP SOUTH.
844 AM EDT TUE APR 12 2016 HIGH PRESSURE IS EXPECTED TO BRING DRY WEATHER AND A GRADUAL WARMING TREND THROUGH THE WEEKEND. BUILDING HIGH PRESSURE SHOULD BRING A RAPID CLRG TREND THIS MRNG. THOUGH A WEAK UPR TROF COULD BRING SOME INCREASE IN CLOUDS WED N OF PIT. DRY AND WARMER THROUGH THE EXTENDED AS HIGH PRESSURE ALOFT AND AT THE SURFACE BUILDS OVER THE REGION. COLD FRONT WELL EAST OF THE RIDGES WITH SKIES CLEARING BEHIND. CLOUDS WILL EXIT SOUTHEAST RIDGES MID MORNING.
AS THE FRONT AND ITS UPPER TROUGH MOVE EAST OF THE CASCADES.
SUNNY SKIES SHOULD DEVELOP IN ALL AREAS BY EARLY AFTERNOON WITH TEMPERATURES WARMING INTO THE LOWER TO MIDDLE 60S IN MOST LOCATIONS. /ISSUED 245 AM CDT TUE APR 12 2016/ A COLD FRONT CURRENTLY STRETCHES FROM NEAR CROSSVILLE TENNESSEE TO ABERDEEN MISSISSIPPI. COOLER TEMPERATURES CONTINUE TO FILTER INTO THE MIDSOUTH BEHIND THE FRONT. HIGHS WILL BE IN THE LOWER TO MID 60S. THE MOSTLY CLEAR CONDITIONS WILL BE SHORT LIVED AS THE DEPARTING COLD FRONT WILL STALL OUT ALONG THE GULF COAST BY WEDNESDAY.
707 AM EDT TUE APR 12 2016 AVIATION A HIGH PRESSURE RIDGE WILL BUILD IN AND BRING A PROLONGED PERIOD OF DRY WEATHER THROUGH THE UPCOMING WEEK AND WEEKEND. SHORT TERM FCST CONCERNS ARE MINIMAL AS HIGH PRESSURE WILL CONTINUE TO BUILD IN THROUGH MIDWEEK AND BRING DRY WX WITH A GRADUAL MODERATING TREND OF TEMPERATURES. A FEW FLURRIES ARE POSSIBLE OVER OUR FAR NORTHERN FCST AREA THROUGH MID MORNING TODAY AS A RESULT OF THE UPPER TROUGH AXIS OVERHEAD. HOWEVER THE DRY AIRMASS AND RIDGING BUILDING IN THE CHANCE FOR FLURRIES WILL END BY MID TO LATE MORNING. HOWEVER MOST LOCATIONS WILL NOT GET ANY PCPN GIVEN THE DRY AIRMASS IN PLACE AND SUBSIDENCE UNDER THE RIDGE.
655 AM CDT TUE APR 12 2016 THE COLD FRONT HAS RECENTLY EXITED THE REGION INTO SE TX/CNTRL LA THIS MORNING. /ISSUED 336 AM CDT TUE APR 12 2016/ SLOW MOVG COLD FRONT EXITING CWA AND WILL SEE A BREAK FROM PCPN DURG THE DAYTIME. UPPER LOW MOVES ACROSS TX PANHANDLE TUE NIGHT AND BRINGING AN INCREASING CHANCE OF SHOWERS OVERNIGHT INTO NE TX. EXPECT THUNDER TO BE LIMITED WITH THIS SYSTEM AS THE UPPER LOW BEGINS TO CLOSE OFF AND MOVE SLOWLY ACROSS AR WED INTO THUR.
1050 AM EDT TUE APR 12 2016 SHOWERS ALONG WITH ISOLATED THUNDERSTORMS ARE EXPECTED TODAY AHEAD OF AN APPROACHING COLD FRONT.
A BRIEF CHANGE TO DRIER CONDITIONS IS EXPECTED WEDNESDAY BEFORE THE NEXT LOW PRESSURE SYSTEM MOVES ACROSS THE REGION.
952 AM CDT TUE APR 12 2016 QUIET WEATHER TODAY WITH SUNNY SKIES AND LIGHT WINDS DUE TO HIGH PRESSURE DRIFTING OVERHEAD. EXPECT THE LAKE BREEZE TO KEEP TEMPERATURES COOLER NEAR THE LAKE. VFR CONDITIONS THROUGH THE FORECAST AS HIGH PRESSURE MOVES ACROSS THE STATE TODAY.
1109 AM EDT TUE APR 12 2016 A COLD FRONT WILL FINISH CLEARING THE AREA THIS MORNING. A LARGE HIGH PRESSURE AREA WILL BUILD IN WEDNESDAY.
The region was under northwesterly flow aloft as the mid-level trough progressed eastward beyond the Great Lakes region. At the surface, high pressure was centered over Minnesota and Iowa and stretched southward across Kansas, resulting in light northeasterly winds early this morning. This southerly component to the wind combined with mostly sunny skies will allow for seasonal conditions today with highs reaching into the low/mid 60s. Conditions will remain dry through the day with dewpoint temperatures generally staying in the 20s, resulting in relative humidity values dropping into the low to mid 20 percent range. These southerly winds will allow overnight temperatures to be a few degrees warmer than this morning with lows in the mid/upper 30s to around 40 degrees.
CHATTANOOGA AIRPORT, TN 66 49 70 51 / 20 10 10 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 62 44 69 49 / 50 10 0 10 OAK RIDGE, TN 63 43 70 50 / 30 10 0 10 TRI CITIES AIRPORT, TN 62 38 69 41 / 100 10 0 0.
WILL KEEP SLIGHT CHANCE TO CHANCE RAIN/FREEZING RAIN ACROSS THE NORTHWEST FOR A FEW HOURS THIS MORNING. LOW PRESSURE IN THE LEE OF THE ROCKIES HAD BEGUN TO ADVANCE EASTWARD AS A WARM FRONT. THERMAL PROFILES SUGGEST A POSSIBILITY OF FREEZING RAIN. ANTICIPATING WHETHER SHOWERS WERE REACHING THE GROUND (PERHAPS ONLY VIRGA SOME AREAS WHERE THERE ARE RADAR ECHOES) AND THAT TEMPERATURES WILL BE ABOVE OR BELOW THE FREEZING MARK. AROUND NOON TODAY THE SURFACE WARM FRONT MOVES INTO WESTERN NORTH DAKOTA.
IT WILL BE MUCH COOLER TODAY WITH TEMPERATURES AROUND 10 DEGREES LOWER THAN YESTERDAY. ESPECIALLY ACROSS THE LOWER COLUMBIA BASIN.
/ISSUED 245 AM CDT TUE APR 12 2016/ A COLD FRONT CURRENTLY STRETCHES FROM NEAR CROSSVILLE TENNESSEE TO ABERDEEN MISSISSIPPI. COOLER TEMPERATURES CONTINUE TO FILTER INTO THE MIDSOUTH BEHIND THE FRONT. HIGHS WILL BE IN THE LOWER TO MID 60S. THE MOSTLY CLEAR CONDITIONS WILL BE SHORT LIVED AS THE DEPARTING COLD FRONT WILL STALL OUT ALONG THE GULF COAST BY WEDNESDAY.
1208 PM EDT TUE APR 12 2016 HIGH PRESSURE IS EXPECTED TO BRING DRY WEATHER AND A GRADUAL WARMING TREND THROUGH THE WEEKEND. THOUGH A WEAK UPR TROF COULD BRING SOME INCREASE IN CLOUDS WED N OF PIT. DRY AND WARMER THROUGH THE EXTENDED AS HIGH PRESSURE ALOFT AND AT THE SURFACE BUILDS OVER THE REGION.
634 AM CDT TUE APR 12 2016 HIGH PRESSURE ACROSS THE REGION WILL CONTINUE TO PROPAGATE EASTWARD WITH RETURN FLOW DEVELOPING DURING THE MORNING HOURS. UPPER RIDGING BUILDS INTO THE REGION ON WEDNESDAY ALONG WITH A SOUTHERLY LOW LEVEL FLOW AND A WARMING AIRMASS. SOUTHWEST FLOW ALOFT AND ANY WEAK UPPER WAVES EJECTING FROM THE MEAN WESTERN CONUS TROUGH COULD LEAD TO SHOWERS.
SOME ECHOS ARE EVIDENT ON ABR RADAR HOWEVER JUST LIKE IN WESTERN ND NO PCPN HAS BEEN REPORTED REACHING THE SFC WITH THE LOW LEVEL DRYNESS. HIGH PRESSURE ACROSS THE REGION WILL CONTINUE TO PROPAGATE EASTWARD WITH RETURN FLOW DEVELOPING DURING THE MORNING HOURS. UPPER RIDGING BUILDS INTO THE REGION ON WEDNESDAY ALONG WITH A SOUTHERLY LOW LEVEL FLOW AND A WARMING AIRMASS. SOUTHWEST FLOW ALOFT AND ANY WEAK UPPER WAVES EJECTING FROM THE MEAN WESTERN CONUS TROUGH COULD LEAD TO SHOWERS.
637 AM CDT TUE APR 12 2016 High pressure will build into the region today, resulting in abundant sunshine and cool temperatures. Forecast soundings suggest mixing up to around 850mb beneath the subsidence inversion, which yields highs only in the lower to middle 50s. Ridge of high pressure will remain overhead tonight, resulting in another clear and cold night across central Illinois. Low temperatures will be a couple of degrees warmer than last night, with readings generally bottoming out in the lower to middle 30s. Persistent upper troughing across eastern Canada/Great Lakes will relax this week, as an upper ridge builds into the Midwest.
1016 AM EDT TUE APR 12 2016 A COLD FRONT EXITS THE REGION BY THIS AFTERNOON WITH HIGH PRESSURE BUILDING IN THE WAKE FOR THE SECOND HALF OF THE WEEK. COLD FRONT HAS CLEARED MOST OF THE CWA. NW FLOW IN THE WAKE WITH OCNL GUSTS AND USHERING IN COOLER AIR. HIGH PRESSURE BUILDING IN TONIGHT WILL BRING ABOUT CLEARING SKIES AND LIGHT WINDS.
A LOW PRESSURE SYSTEM WILL BRING SCATTERED SHOWERS AND THUNDERSTORMS TO AREAS EAST OF TUCSON TODAY.
1130 AM EDT TUE APR 12 2016 THE AVIATION SECTION HAS BEEN UPDATED BELOW DRY WEATHER IS EXPECTED NEXT SEVERAL DAYS AS STRONG HIGH PRESSURE IS EXPECTED TO BUILD ACROSS INDIANA AND THE GREAT LAKES INTO THE WEEKEND. AS THE HIGH PROGRESSES TO THE EAST OF INDIANA BY WEDNESDAY WARMER AIR WILL BEGIN TO ARRIVE. SURFACE ANALYSIS SHOWS STRONG HIGH PRESSURE IN PLACE OVER THE UPPER MIDWEST. GFS AND NAM SHOWS TODAY AND TOMORROW BEING THE LAST FEW DAYS OF NW FLOW ALOFT AS STRONG RIDGING OVER THE WESTERN UNITED STATES BEGINS TO BUILD EAST. SUBSIDENCE AND CLEAR SKIES ARE STILL EXPECTED TONIGHT AS INDIANA REMAINS UNDER THE INFLUENCE OF HIGH PRESSURE TO THE NORTHEAST. TEMPS BELOW FREEZING LOOK VERY REASONABLE.
CURRENTLY WATCHING THE COLD FRONT SLOWLY SLIDE SOUTH THIS EARLY MORNING. AS WITH TYPICAL STALLED FRONTAL BOUNDARIES AND AN ACTIVE SOUTHERN STREAM A LOW PRESSURE SYSTEM WILL DEVELOP ALONG THE FRONT NEAR NEW ORLEANS BY WEDNESDAY MORNING AND THEN SWING INTO THE AREA LATE IN THE DAY ON WEDNESDAY.
IN THE LOW LEVELS OF THE ATMOSPHERE. AN ATLANTIC RIDGE OF HIGH PRESSURE WILL EXTEND ACROSS CENTRAL FLORIDA THIS AFTERNOON. AN ANTICYCLONE WILL BE LOCATED NEAR THE YUCATAN PENINSULA TODAY. A RIDGE OF HIGH PRESSURE WILL PROGRESS EASTWARD OVER THE BAHAMAS THIS AFTERNOON.
1238 PM EDT TUE APR 12 2016 HIGH PRESSURE IS EXPECTED TO BRING DRY WEATHER AND A GRADUAL WARMING TREND THROUGH THE WEEKEND. THOUGH A WEAK UPR TROF COULD BRING SOME INCREASE IN CLOUDS WED N OF PIT. DRY AND WARMER THROUGH THE EXTENDED AS HIGH PRESSURE ALOFT AND AT THE SURFACE BUILDS OVER THE REGION.
BUT ADDITIONAL CLOUDS WILL FORM AHEAD OF AN UPPER LOW THIS AFTERNOON/EVENING. PRECIPITATION CHANCES WILL INCREASE THIS EVENING AND OVERNIGHT AS THE UPPER LOW MOVES FROM EASTERN NEW MEXICO INTO FAR WESTERN OKLAHOMA.
A MUCH QUIETER DAY IS IN STORE FOR THE ARKLAMISS REGION AS THE COLD FRONT HAS PUSHED MOSTLY SOUTH OF THE CWA OR AT LEAST IN THE FAR SOUTHEASTERN PORTION OF THE AREA. A MIX OF SUN AND CLOUDS IS EXPECTED TODAY AND TEMPERATURES WILL WARM DECENTLY INTO THE LOWER 70S FOR MOST LOCATIONS. THE EXCEPTION TO THIS MAY BE IN THE DELTA WHERE SLIGHTLY COOLER READINGS WILL OCCUR. THIS EARLY MORNING THE COLD FRONT WAS SITUATED NEAR THE NATCHEZ TRACE, WITH SEVERAL SHOWERS AND A FEW THUNDERSTORMS STILL ONGOING ACROSS SOUTHEAST MISSISSIPPI.
1048 AM EDT TUE APR 12 2016 THE NEAR TERM SECTION HAS BEEN UPDATED BELOW DRY WEATHER IS EXPECTED NEXT SEVERAL DAYS AS STRONG HIGH PRESSURE IS EXPECTED TO BUILD ACROSS INDIANA AND THE GREAT LAKES INTO THE WEEKEND. AS THE HIGH PROGRESSES TO THE EAST OF INDIANA BY WEDNESDAY WARMER AIR WILL BEGIN TO ARRIVE. SURFACE ANALYSIS SHOWS STRONG HIGH PRESSURE IN PLACE OVER THE UPPER MIDWEST. GFS AND NAM SHOWS TODAY AND TOMORROW BEING THE LAST FEW DAYS OF NW FLOW ALOFT AS STRONG RIDGING OVER THE WESTERN UNITED STATES BEGINS TO BUILD EAST. SUBSIDENCE AND CLEAR SKIES ARE STILL EXPECTED TONIGHT AS INDIANA REMAINS UNDER THE INFLUENCE OF HIGH PRESSURE TO THE NORTHEAST. TEMPS BELOW FREEZING LOOK VERY REASONABLE.
903 AM EDT TUE APR 12 2016 HIGH PRESSURE AND A DRY AIRMASS WILL SETTLE IN ACROSS THE GREAT LAKES AND OHIO VALLEY TODAY.
MOST OF THE HIGH TEMPERATURES WERE IN PRETTY GOOD SHAPE DESPITE CLOUD COVER.
For now MLC looks to have the higher chances of all TAF sites and will carry prob30 group for late in the period. cooler for NW AR. An amplified blocking pattern is expected to evolve. with a deep trough to our west and an omega block to our east. A slow moving upper low will result in several periods of rain/storm chances.
WE ALSO HAVE A WAA BAND OF MID LEVEL CLOUDS ALONG WITH A FEW LIGHT SHOWERS MOVING EAST ACROSS NE SD/WC MN WITH MORE CLOUDS HEADING SOUTHEAST FROM ND WITH A SHORT WAVE TROUGH. THE SKIES SHOULD BE MOSTLY CLOUDY ACROSS THIS REGION WITH MAINLY SLIGHT CHANCES OF SHOWERS WITH THE SHORT WAVE TROUGH. WILL KEEP POPS ON THE LOW SIDE. WARMER AIR WILL BE THE RULE FOR TUESDAY. DESPITE THE WARMER AIR.
1000 AM EDT TUE APR 12 2016 HIGH PRESSURE FROM THE UPPER MIDWEST WILL MOVE TO THE EASTERN GREAT LAKES BY WEDNESDAY. THE LONG WAVE TROUGH ALOFT WILL BE SLIDING EAST OF THE AREA THIS MORNING. GIVEN THE RIDGE AXIS BEING WELL TO THE NORTHWEST. DERIVING THE HIGH TEMPERATURE FROM THE FORECAST 850 MB TEMPS GAVE ME ONLY 40-45 AND UPSTREAM TEMPERATURES WERE IN THE 40S YESTERDAY SO THE HIGH TEMPERATURE FORECAST IS SHADED TOWARD THE LOWER GUIDANCE OR A LITTLE BELOW GUIDANCE. HIGHS IN THE LOWER/MID 50S INLAND AND MID/UPPER 40S NEAR LAKE ERIE.
A WEAK COLD FRONT WILL CONTINUE EAST ACROSS SE OREGON THIS MORNING AND IS EXPECTED TO REACH BOISE AROUND 18Z AND TWIN FALLS AROUND 21Z. INCREASING CLOUDS THIS MORNING ALONG NUMEROUS RAIN SHOWERS WILL KEEP TEMPERATURES COOLER ACROSS MOST OF THE AREA TODAY WHICH SHOULD LIMIT INSTABILITY ACROSS SOUTHWEST IDAHO. PACIFIC COLD FRONT WILL MOVE ACROSS ERN OREGON 16Z-20Z AND WRN IDAHO 20Z-02Z WITH -SHRA AND ISOLATED -TSRA. SCATTERED -SHRA CONTINUING BEHIND THE COLD FRONT. AND WILL PUSH A COLD FRONT THROUGH LATER TODAY. THESE SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO TONIGHT AND TOMORROW AS THE MAIN UPPER LOW EDGES CLOSER AND HIGH PW AIR STREAMS IN FROM THE SW.
UPPER LEVEL RIDGE OVER THE REGION SHIFTS EASTWARD FAR ENOUGH TO ALLOW A MOIST AND UNSTABLE AIRMASS TO STREAM INTO WESTERN AND CENTRAL MONTANA THIS AFTERNOON. HIGH PRESSURE RIDGE CURRENTLY CENTERED OVER THE ROCKY MTN FRONT WILL GRADUALLY MOVE INTO CENTRAL MT THIS MORNING AND THEN INTO EASTERN MT BY THIS EVENING. MOISTURE ON THE WEST SIDE OF THE RIDGE WILL COME EAST OF THE CONTINENTAL DIVIDE BY MID-AFTN, BRINGING STEADY INCREASE IN CLOUD COVER WITH CEILINGS LOWERING TO AROUND 7000-10000 FT VCNTY KGTF/KHLN.