Aikyam-Lab/Synoptic-Bench huggingface dataset:
A WINTRY MIX OF PRECIPITATION IS ON TAP FOR SUNDAY AS SNOW TRANSITIONS THROUGH SLEET AND A BIT OF FREEZING RAIN TO ALL RAIN THROUGH THE COURSE OF THE DAY. THESE AREA WILL ALSO HAVE A LONGER PERIOD OF SLEET AND FREEZING RAIN. TEMPERATURES WILL BE MARGINAL IN THE UPPER 20S AND LOWER 30S AND THE SLEET AND FREEZING RAIN WILL BE LIGHT AND FALLING ON SLUSHY SNOW.
AN UPPER LOW IS NOTED SPINNING OFF THE SOUTHERN CALIFORNIA COAST THIS EVENING WITH AN ASSOCIATED MID LEVEL DEFORMATION AXIS EXTENDING INLAND ACROSS THE GREAT BASIN AND OVER NORTHERN UTAH. THE AFOREMENTIONED UPPER LOW IS FORECAST TO TRANSLATE INLAND AND THROUGH THE DESERT SOUTHWEST DURING THE DAY SUNDAY.
Showers and thunderstorms will begin to affect the northeast Oklahoma sites late Sunday evening as a cold front approaches from the north.
739 PM EDT SAT APR 9 2016 NEAR RECORD LOW TEMPERATURES TONIGHT AS HIGH PRESSURE SETTLES OVER THE REGION.
A SPRAWLING AREA OF HIGH PRESSURE IS CENTERED OVER THE GREAT LAKES WITH A RIDGE NOSING INTO THE SOUTHEAST UNITED STATES.
SHOWERS WITH A FEW T-STORMS HAVE DEVELOPED OVER THE HIGH COUNTRY AND ALSO ALONG AND SOUTH OF HIGHWAY 26 THIS AFTERNOON WITHIN A MARGINALLY UNSTABLE ENVIRONMENT. STILL FEEL THAT WINDS WILL WEAKEN OVER THE NEXT HOUR OR SO FROM DOUGLAS TO LUSK TO CHADRON AS THE COLD FRONT IS BEGINNING TO ENTER INTO OUR FORECAST AREA FROM THE NORTH. THE COLD FRONT WILL CLEAR THE EASTERN PLAINS BY SUNDAY MORNING. GUSTY WINDS AROUND 50 MPH WILL OCCUR ALONG THE I-80 CORRIDOR FROM ARLINGTON TO KIMBALL THROUGH EARLY TONIGHT AHEAD OF THE COLD FRONT. BUT WILL STEADILY TRANSITION TO SNOW IN THE HIGHER ELEVATIONS LATE SUNDAY AS COLD AIR ADVECTS IN FROM THE NORTH. COULD CERTAINLY SEE A FEW AFTERNOON THUNDERSTORMS AS WELL OVER THE HIGH COUNTRY WITHIN MARGINALLY UNSTABLE CONDITIONS.
A RIDGE OF HIGH PRESSURE OVER THE PACNW WILL PROVIDE MOSTLY CLEAR SKIES TONIGHT.
BUT THIS RIDGE WILL CONTINUE TO MOVE EASTWARD THROUGH THE NIGHT ALLOWING AN EAST-SOUTHEAST FLOW TO DEVELOP TOWARDS DAYBREAK.
621 PM CDT SAT APR 9 2016 FOR 00Z TAFS /ISSUED 211 PM CDT SAT APR 9 2016/ THE SURFACE ANALYSIS AT 19Z INDICATED THAT THE COLD FRONT WAS NOW MOVING THROUGH CENTRAL TOWARD SOUTH ALABAMA AND A LARGE AREA OF HIGH PRESSURE AT SURFACE AND ALOFT WAS RIDGING SOUTHEAST INTO THE OHIO AND TENNESSEE VALLEY REGIONS. THE SHORT TERM MODELS PROGRESSIVELY MOVE THE HIGH PRESSURE AREA EAST OF THE REGION BY 12Z SUNDAY.
A SHORT WAVE TROUGH IS FORECAST TO PUSH ACROSS THE RIO GRANDE AND SOUTHERN EDWARDS PLATEAU EARLY SUNDAY EVENING.
/ISSUED 306 PM CDT SAT APR 9 2016/ SUNNY AND COOLER WEATHER ACROSS THE MIDSOUTH THIS AFTERNOON WITH GENERALLY NORTHEAST WINDS OF 5 TO 15 MPH.
/ISSUED 307 PM CDT SAT APR 9 2016/ A FEW SHOWERS WILL CONTINUE TO LIFT NEWRD OUT OF SW/S OK THIS AFTERNOON AND EVENING AHEAD OF A MID LEVEL TROUGH AXIS. MID TO UPPER LEVEL RIDGING WILL THEN PASS OVERHEAD TOMORROW, AS A NEGATIVELY TILTED UPPER TROUGH MOVES INTO THE SW CONTINUE NEAR SOCAL AND THE NORTHERN BAJA PENINSULA.
ISSUED BY NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 1112 PM EDT SAT APR 9 2016 LOW PRESSURE TRACKS OUT TO SEA TONIGHT. A WARM FRONT PASSES LATE SUNDAY.
COLD FRONT HAS PUSHED THROUGH THE AREA WITH SOME WEAK UPSLOPE ALONG SOUTHERN ZONES POSSIBLY ABLE TO DEVELOP A LIGHT SHOWER OR TWO THROUGH MIDNIGHT. COLD FRONT SAGGING SOUTHWARD THROUGH EASTERN MONTANA TODAY. SECONDARY PUSH /700MB FRONT/ BRINGING IN COOLER AIR AND DROPPING TEMPS. NORTH TO NORTHEAST LOW LEVEL FLOW AND A COOLER AIR MASS WILL MEAN COOLER TEMPS FOR SUNDAY.
559 PM MDT SAT APR 9 2016 EARLY AFTERNOON WV IMAGERY AND UPPER LEVEL ANALYSIS INDICATES SPLIT FLOW STILL IN PLACE ACROSS THE PLAINS WITH RIDGING BEGINNING TO BREAK DOWN ACROSS THE SOUTHERN PLAINS AND CENTRAL ROCKIES. AT THE SURFACE A STALLED FRONT HAS FINALLY BEGIN TO LIFT AS A WARM FRONT TO THE NORTHEAST AND IS CURRENTLY NEAR ATWOOD AND HILL CITY. CLOSED LOW OVER THE SOUTHWEST US WILL MOVE TOWARDS THE SOUTHERLY PLAINS DURING THE DAY SUNDAY.
921 PM EDT SAT APR 9 2016 NEAR RECORD LOW TEMPERATURES TONIGHT AS HIGH PRESSURE SETTLES OVER THE REGION.
1017 PM EDT SAT APR 9 2016 HIGH PRESSURE WILL BUILD SOUTHEAST INTO THE REGION TONIGHT.
/ISSUED 343 PM CDT SAT APR 9 2016/ BROAD SUBSIDENCE WAS IN CONTROL THIS AFTERNOON FOLLOWING THIS MORNING/S UPPER TROUGH AND WELCOME RAINFALL. THE BROADER PICTURE ON SUNDAY WILL FEATURE SHALLOW UA RIDGING EXITING THE REGION AHEAD OF STRONGER SOUTHWESTERLIES AND WEAK HEIGHT FALLS WELL DOWNSTREAM OF A CLOSED LOW /CURRENTLY WEST OF THE CHANNEL ISLANDS/. THIS INCREASED SOUTHERLY COMPONENT AND NORTHWARD- ADVANCING MOISTURE MAY RESEMBLE A WARM FRONT LIFTING INTO THE SRN PANHANDLE THRU 00Z. LATEST DATA SHOWS TIGHT UPPER LOW SHOULD TRANSITION THE PANHANDLE WITH BROAD SOUTHWEST FLOW TO THE SOUTH OF THE FEATURE.
WEAK HIGH PRESSURE INFLUENCE EXISTS OVER THE REGION. MAINLY IN THE 50S WITH SOME UPPER 40S POSSIBLE IN COOLER INTERIOR SPOTS. SHORT RANGE MODELS INDICATE MARINE STRATOCU WILL MOVE ONSHORE IN THE LOW LVL EASTERLY FLOW WITH PARTLY CLOUDY SKIES INLAND AND VARIABLE CLOUDINESS NEAR THE EAST COAST BY LATE MORNING INTO THE AFTERNOON.
812 PM EDT SAT APR 9 2016 HIGH PRESSURE WILL BUILD SOUTHEAST INTO THE REGION TONIGHT.
930 PM CDT SAT APR 9 2016 Calm night across West Texas and Southeast New Mexico under weak, dirty ridging. Will transition to weak ridging aloft but an active week is in store.
TEMPERATURES WILL BE WARMER AT THE COAST WITH READINGS IN THE UPPER 40S AND LOWER 50S. NW WINDS WILL VEER TO THE NORTH AND NORTHEAST BY MORNING AS HIGH PRESSURE TO THE NW BUILDS E.
112 AM EDT TUE JUL 21 2015 LINE OF CONVECTION ALONG COLD FRONT STRETCHES FROM HARRISVILLE TO A BIT NW OF HTL. THOUGH MID CLOUDS ARE SEEN IN UPPER TROFFING IN NORTHERN ONTARIO. COLD FRONT MOVING THROUGH THE REGION FIRING OFF THUNDERSTORMS THIS AFTERNOON. COLD FRONT CLEARS THE SOUTHEAST BY 02Z THIS EVENING WITH CLEARING BEHIND. THIS WILL LEAD TO A BIT COOLER AND LESS HUMID CONDITIONS TUESDAY FOLLOWED BY SLOWLY WARMING TEMPERATURES FOR THE REMAINDER OF THIS PERIOD.
442 AM EDT TUE JUL 21 2015 SCATTERED SHOWERS AND THUNDERSTORMS ALONG A PASSING COLD FRONT TODAY WILL BE FOLLOWED BY DRY WEATHER AND SEASONAL TEMPERATURES THE REMAINDER OF THE WEEK. SCATTERED SHOWERS AND THUNDERSTORMS WILL ACCOMPANY A COLD FRONT TODAY AS IT CROSSES THE REGION LATE THIS MORNING AND AFTERNOON. HIGH PRESSURE WILL BE THE DOMINANT FEATURE THROUGH THE SECOND HALF OF THE WEEK. RESTRICTION CHANCES WILL INCREASE LATE THIS MORNING AND DURING THE AFTERNOON AS A COLD FRONT ADVANCES ON.
SOUTHWEST FLOW WILL STRENGTHEN OVER TIME ACROSS THE AREA AS BROAD UPPER TROF ALONG THE WEST COAST SLOWLY WORKS EASTWARD. MOST OF THE STRONGER ENERGY ASSOCIATED WITH THE TROF WILL MISS THE FORECAST AREA TO THE WEST AND NORTH. PRECIPITATION CHANCES WILL BE A BIT BETTER ON WEDNESDAY COMPARED TO TODAY BASED ON THE PROXIMITY OF THE WESTERN TROF. HI-RES ENSEMBLE MODELS ALSO SHOWING THE POTENTIAL FOR A FEW STORMS TO DEVELOP MID AFTERNOON OVER SOUTHEAST MONTANA AND NORTHEAST WYOMING IN THE VICINITY OF A SURFACE TROF AND THE BLACK HILLS. WITH THE SOUTHWEST FLOW EXPECT WARMER TEMPERATURES WITH LOWER 90S LOOKING REASONABLE FOR MOST LOW ELEVATION LOCATIONS TODAY AND WEDNESDAY.
THE INTERACTION BETWEEN AN UPPER TROUGH APPROACHING THE NORTHWEST AND MOISTURE AHEAD OF IT WILL BRING AN INCREASED CHANCE OF SHOWERS AND THUNDERSTORMS THROUGH WEDNESDAY. AND THE HIGHER TERRAIN OF SW IDAHO. AIDED BY BY AN UPPER JET SITUATED ON THE EASTERN FLANK OF THE APPROACHING TROUGH.
319 AM CDT TUE JUL 21 2015 HIGH PRESSURE CENTERED OVERHEAD WILL DRIFT EAST TODAY.
NUMEROUS SHOWERS AND STORMS WITH LOCALLY HEAVY RAIN AND FREQUENT AS SHORT WAVE TROUGH MOVES ACROSS THE NE U. WITH RIDGE TO THE SOUTH OF THE AREA (ACROSS S FL). BUT STILL GET MAX TEMPS IN THE LOWER TO MID 90S WITH HEAT INDICES 103 TO 108 DEGREES. THE MEAN LAYER TROUGH WILL DIG TO THE SOUTH.
350 AM EDT TUE JUL 21 2015 TROUGHING ALOFT HELPING TO BRING IN PLENTY OF LOW-LEVEL MOISTURE AROUND 5KFT OVER UPR MICHIGAN THIS AFTN. SCT-BKN SC/CU HAS RESULTED AND WITH COLD FRONT WORKING ACROSS FAR SE-E CWA. APPEARS THAT SINCE THE HIGH PRESSURE RIDGE WILL REMAIN WEST OF UPPER GREAT LAKES. MAY SEE SHOWERS AND THUNDERSTORMS ALONG AND/OR NEAR THE WI BORDER THU AS MODELS SHOW A WARM FRONT MOVING INTO THE AREA FROM THE W. THE DISTURBANCE THAT THE WARM FRONT IS TIED TO WILL MOVE ACROSS MANITOBA CANADA AND HUDSON BAY FRI INTO SUN. WINDS WILL REMAIN LESS THAN 20 KTS AS HIGH PRESSURE DRIFTS SLOWLY ACROSS THE GREAT LAKES.
252 AM MST TUE JUL 21 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. TEMPERATURES WILL REMAIN HOT THROUGH THE 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.
218 AM EDT TUE JUL 21 2015 A COLD FRONT CROSSES TONIGHT. SIGNIFICANT DRYING IN THE MID LEVELS WILL BE TAKING PLACE INTO THIS EVENING AMID AN APPROACHING COLD FRONT. THE LOW LEVEL FLOW WILL GO NEARLY CALM WHICH SHOULD ALLOW FOR AREAS OF DENSE RIVER VALLEY FOG TO FORM ALONG AND N OF I64 WITH LOW STRATUS THE RULE IN S WV AND SW VA CLOSER TO THE FRONT. HIGH PRESSURE WILL BE THE NAME OF THE GAME AND SLIGHTLY COOLER AIR WITH LOWER DEWPOINTS FOR THE SHORT TERM FORECAST. NO REAL CHANGES TO THE EXTENDED WITH MODELS HOLDING ONTO HIGH PRESSURE INTO THE WEEKEND.
117 AM EDT TUE JUL 21 2015 A COLD FRONT WILL MOVE THROUGH THE REGION ON TUESDAY WITH A NARROW BAND OF SHOWERS AND POSSIBLY A FEW THUNDERSTORMS EXPECTED AHEAD OF THE FRONT. ONCE THE COLD FRONT MOVES OUT OF THE AREA TUESDAY NIGHT.
EXPECT SCT-BKN CU TO DEVELOP BY LATE MRNG WITH DAYTIME HEATING UNDER H85 THERMAL TROF/LINGERING MSTR. EXPECT THE LOWEST MAX TEMPS IN THIS AREA AS WELL WITH MORE LK SUP MODERATION. MAY SEE SHOWERS AND THUNDERSTORMS ALONG AND/OR NEAR THE WI BORDER THU AS MODELS SHOW A WARM FRONT MOVING INTO THE AREA FROM THE W. THE DISTURBANCE THAT THE WARM FRONT IS TIED TO WILL MOVE ACROSS MANITOBA CANADA AND HUDSON BAY FRI INTO SUN. SOME STRONGER WINDS UP TO 20 KTS WILL BE POSSIBLE ON FRI/SAT AS A COLD FRONT CROSSES THE REGION.
A WEAK COLD FRONT HAS ALSO PUSHED THROUGH MUCH OF SOUTHWEST KANSAS EARLY THIS AFTERNOON. THESE THUNDERSTORMS MAY LINGER INTO WEDNESDAY AS THE TROUGH AXIS PASSES INTO CENTRAL KANSAS DURING THE DAY.
MORNING WATER VAPOR SATELLITE IMAGERY IS SHOWING AN UPPER LEVEL RIDGE OF HIGH PRESSURE THAT IS SPRAWLED ACROSS THE GULF COAST AND INTO TEXAS. THE SUBTROPICAL RIDGE AXIS WILL REMAIN OVER THE FLORIDA STRAITS TODAY AND WEDNESDAY.
634 AM EDT TUE JUL 21 2015 A COLD FRONT CROSSES TONIGHT. DRY HIGH PRESSURE FOR WEDNESDAY INTO THE WEEKEND. SIGNIFICANT DRYING IN THE MID LEVELS WILL BE TAKING PLACE INTO THIS EVENING AMID AN APPROACHING COLD FRONT. THE LOW LEVEL FLOW WILL GO NEARLY CALM WHICH SHOULD ALLOW FOR AREAS OF DENSE RIVER VALLEY FOG TO FORM ALONG AND N OF I64 WITH LOW STRATUS THE RULE IN S WV AND SW VA CLOSER TO THE FRONT. A HIGH PRESSURE SYSTEM WILL BUILD OVER THE AREA ON WEDNESDAY. NO REAL CHANGES TO THE EXTENDED WITH MODELS HOLDING ONTO HIGH PRESSURE INTO THE WEEKEND.
240 AM PDT TUE JUL 21 2015 LOW PRESSURE OFF THE CALIFORNIA COAST CONTINUES TO PULL MOISTURE NORTH INTO THE EASTERN SIERRA AND WESTERN NEVADA.
COOLER CONDITIONS RETURN TO THE COAST TUESDAY AND WILL TREND COOLER INLAND THROUGH MIDWEEK.
AN UPPER LEVEL TROUGH OVER THE GREAT LAKES WILL MOVE EAST AS A RIDGE EXTENDS ACROSS THE PLAINS.
310 AM EDT TUE JUL 21 2015 A RIDGE OF HIGH PRESSURE WILL DOMINATE THROUGH MID WEEK WITH AN UPPER LEVEL DISTURBANCE APPROACHING THE SOUTHEAST US WEDNESDAY. SPC CURRENTLY HAS US IN GENERAL THUNDER BUT COULD HAVE A FEW STRONGER STROMS ALONG COLD FRONT. EXTENDED GUIDANCE KEEPS UPPER RIDGE OVER CENTRAL US WITH TROUGH OVER THE NE US.
ALBEIT STEADY SOUTHEAST TO SOUTH WIND TEMPERATURES ARE HOLDING IN THE LOWER 80S OVER MUCH OF THE ISLAND CHAIN EXCEPT IN THE UPPER 70S IN A FEW LARGER INTERIOR ISLANDS. A TWO PRONG RIDGE IS APPARENT.
643 AM EDT TUE JUL 21 2015 A COLD FRONT IS EXPECTED TO MOVE THROUGH THE REGION TODAY AND WILL BRING THE CHANCE FOR SHOWERS AND THUNDERSTORMS.
332 AM CDT TUE JUL 21 2015 HIGH PRESSURE ENCOMPASSES THE ENTIRE NORTH CENTRAL U. CLEAR SKIES AND LOW HUMIDITY WILL PREVAIL TODAY WITH HIGH TEMPERATURES SLIGHTLY BELOW NORMAL IN THE LOW 80S. MID LEVEL MOISTURE WILL INCREASE TONIGHT ON THE WESTERN PERIPHERY OF THE HIGH.
431 AM EDT TUE JUL 21 2015 A COLD FRONT WILL PUSH SOUTHEAST ACROSS CENTRAL PENNSYLVANIA THIS AFTERNOON.
A COLD FRONT WILL MOVE THROUGH THE AREA LATE TODAY BRINGING SHOWERS AND T-STORMS AND A RELIEF FROM THE HEAT AND HUMIDITY. MID-UPPER LEVEL CLOSED LOW OVER JAMES BAY WITH ASSOCIATED TROUGH EXTENDING SOUTH TO THE GREAT LKS REGION WILL MOVE EWD NEXT 36 HRS.
349 AM EDT TUE JUL 21 2015 A COLD FRONT IS EXPECTED TO MOVE THROUGH THE REGION TODAY AND WILL BRING THE CHANCE FOR SHOWERS AND THUNDERSTORMS.
TUESDAY SHOULD BE VERY QUIET ACROSS THE CWA AS HIGH PRESSURE BUILDS BACK INTO THE REGION. HIGHS WILL BE IN THE LOW TO MID 80S WITH LOWS IN THE UPPER 50S TO MID 60S. THERE WILL BE A CHANCE FOR SHOWERS AND STORMS AS A WARM FRONT LIFTS NORTHEAST ACROSS THE REGION ON WEDNESDAY.
A COLD FRONT CROSSES TONIGHT. DRY HIGH PRESSURE FOR WEDNESDAY INTO THE WEEKEND. SIGNIFICANT DRYING IN THE MID LEVELS WILL BE TAKING PLACE INTO THIS EVENING AMID AN APPROACHING COLD FRONT. THE LOW LEVEL FLOW WILL GO NEARLY CALM WHICH SHOULD ALLOW FOR AREAS OF DENSE RIVER VALLEY FOG TO FORM ALONG AND N OF I64 WITH LOW STRATUS THE RULE IN S WV AND SW VA CLOSER TO THE FRONT. A HIGH PRESSURE SYSTEM WILL BUILD OVER THE AREA ON WEDNESDAY. NO REAL CHANGES TO THE EXTENDED WITH MODELS HOLDING ONTO HIGH PRESSURE INTO THE WEEKEND.
331 AM CDT TUE JUL 21 2015 WITH LITTLE CHANGE IN JULY'S PERSISTENT MID/UPPER LEVEL RIDGE.
650 AM EDT TUE JUL 21 2015 HIGH PRESSURE WILL MOVE INTO THE GREAT LAKES AND OHIO VALLEY REGION TODAY BRINGING COOLER TEMPERATURES AND LESS HUMID AIR. SHORT WAVE MOVING ACROSS THE GREAT LAKES THIS MORNING WITH ASSOCIATED COLD FRONT SLOWLY WORKING SOUTH ACROSS OUR LOCAL AREA. ONCE COLD FRONT EXITS THE AREA HIGH PRESSURE WILL BUILD IN WITH SKIES BECOMING MOSTLY SUNNY. COOLER AND LESS HUMID AIR WILL FOLLOW TODAY.
130 AM EDT TUE JUL 21 2015 A COLD FRONT WILL APPROACH THE REGION ON TUESDAY AND MOVE ACROSS THE AREA TUESDAY NIGHT. COOLER AND LESS HUMID WEATHER FOLLOWS FOR THE REMAINDER OF THE WEEK. A COLD FRONT WILL APPROACH THE REGION FROM THE WEST TONIGHT. HEAVIER SHOWERS AND THUNDER ARE LIKELY AS AN UPPER TROUGH ACCOMPANIES THE FRONT AS IT MOVE TROUGH. THE COLD FRONT IS FORECAST SLIDE ACROSS THE REGION TUESDAY NIGHT.
THE SUBTROPICAL RIDGE IS TO THE SOUTHEAST AND TROUGHING EXTENDS FROM THE WY ROCKIES BACK TO THE MAIN LOW CENTER OFF THE CENTRAL CALIFORNIA COASTLINE. POPS REMAIN HIGHEST ALONG THE TAVAPUTS/ROAN TO FLAT TOPS CORRIDOR AND NORTHWARD TODAY WHERE JET DYNAMICS AND CHANNELIZED VORTICITY FROM THE SHEARING TROUGH WILL KEEP THE BEST CHANCE OF SHOWERS/THUNDER GOING. DRIER AND WARMER FORECAST IN STORE FOR WEDNESDAY BUT STILL SOME LINGERING CONVECTION LIKELY TO HOLD ON ACROSS NORTHERN HALF OF THE FORECAST AREA WHERE THE LAST BIT OF SHEARING ENERGY WILL BE DRIFTING NORTHWARD ON A BUILDING RIDGE OF HIGH PRESSURE ALONG THE ROCKIES. THIS SET UP SHOULD CONTINUE THROUGH THU AS LOW PRESSURE SLOWLY MOVES ONSHORE TO THE WEST AND HIGH PRESSURE CONSOLIDATES OVER TEXAS.
654 AM EDT TUE JUL 21 2015 A COLD FRONT IS EXPECTED TO MOVE THROUGH THE REGION TODAY AND WILL BRING THE CHANCE FOR SHOWERS AND THUNDERSTORMS.
334 AM CDT TUE JUL 21 2015 THUNDERSTORM CHANCES AND WARMER TEMPERATURES WILL HIGHLIGHT THE SHORT TERM. LOW LEVEL FORCING VIA THE FRONT/TROUGH WILL COMBINE WITH UPPER LEVEL FORCING VIA A SHORT WAVE TROUGH AND UPPER LEVEL DIVERGENCE. THE HIGH RESOLUTION SHORT TERM MODELS (WRF/HRRR/RAP) ARE IN GOOD AGREEMENT IN BRINING SCATTERED SHOWERS AND THUNDERSTORMS SLOWLY ACROSS WESTERN AND CENTRAL NORTH DAKOTA TODAY. HIGH TEMPERATURES TODAY SHOULD AVERAGE BETWEEN 5 AND 10 DEGREES WARMER THAN YESTERDAY.
A dry cold front will bring gusty winds and low humidity to the Columbia Basin, Palouse, and West Plains through this evening. Cooler but drier and locally breezy conditions are expected across the Inland Northwest for Tuesday.
640 AM EDT TUE JUL 21 2015 A COLD FRONT WILL CROSS THE AREA LATE TODAY ACCOMPANIED BY SHOWERS AND THUNDERSTORMS.
319 AM CDT TUE JUL 21 2015 HIGH PRESSURE WILL PUSH EAST INTO CENTRAL IOWA THROUGH THE DAY TODAY.
150 AM EDT TUE JUL 21 2015 HIGH PRESSURE WILL MOVE INTO THE GREAT LAKES AND OHIO VALLEY REGION TODAY BRINGING COOLER TEMPERATURES AND LESS HUMID AIR. MOSTLY CLEAR SKIES EXPECTED ON TUESDAY AS HIGH PRESSURE BUILDS EAST INTO THE AREA. HIGH PRESSURE WILL BUILD INTO THE AREA TUE NGT AND WED PROVIDING FAIR WX WITH LINGERING THERMAL TROF EXTENDING S-SW FROM ONTARIO CLOSED UPR LOW KEEPING TEMPS BLO NORMAL. SLOW WARMING TREND EXPECTED THROUGH THE PERIOD AS UPR TROF OVER ERN CANADA/CONUS MOVES OFF THE COAST AND PLAINS RIDGE EXPANDS EASTWARD. MOISTURE/INSTABILITY SHOULD ALSO GRDLY INCREASE THROUGH THE PERIOD AND WITH MEDIUM RANGE MODELS CONTG TO INDICATE A WK TROF DRIFTING SE ACROSS THE GRTLKS OVER THE WEEKEND.
644 AM EDT TUE JUL 21 2015 A COLD FRONT WILL CONTINUE TO WORK THROUGH THE AREA TODAY. HIGH PRESSURE WILL THEN WORK INTO THE REGION FOR THE MIDDLE OF THE WEEK. COLD FRONT WILL WORK THROUGH THE REGION TODAY AND PRECIPITATION WILL GRADUALLY TAPER OFF THIS EVENING. COOLER AND DRIER AIR WILL WORK INTO THE AREA. DRY CONDITIONS ARE EXPECTED FOR THE REMAINDER OF THE SHORT TERM WITH HIGH PRESSURE. WITH COOLER AIRMASS IN PLACE HIGH TEMPERATURES ON WEDNESDAY WILL ONLY BE IN THE UPPER 70S TO THE LOWER 80S.
OVERNIGHT LOWS SHOULD BE ABLE TO FALL INTO THE LOW TO MID 60S AS COOLER AIR FINALLY SPILLS INTO THE REGION. WITH MAX READINGS MOSTLY IN THE LOWER 80S ON TAP. THE PERIOD WILL BEGIN WITH A TROUGH CENTERED OVER QUEBEC AND EXTENDING SOUTH INTO THE EASTERN CONUS. A RIDGE IS EXPECTED TO BE CENTERED OVER THE SOUTHERN PLAINS WITH THIS RIDGING EXTENDING EAST TOWARD THE BAHAMAS AND NORTH INTO THE NORTHERN PLAINS. A TROUGH IS ANTICIPATED OVER THE WESTERN CONUS. THE AXIS OF THE EASTERN CONUS TROUGH WILL MOVE EAST. THE RIDGE WILL REMAIN CENTERED OVER THE PLAINS AND SOME AMPLIFICATION OF THE RIDGE AND THE WESTERN TROUGH IS POSSIBLE BY THE END OF THE PERIOD. THE RIDGE WILL BE CENTERED FAR ENOUGH AWAY FOR PERIODIC BANDS OF CLOUDS TO PASS OVERHEAD.
THE ONLY INHIBITING FACTOR REMAINS MID LEVEL TEMPS AROUND -6C (WHICH IS ABOUT 1-2C WARMER THAN NORMAL). DIGGING 500MB TROUGH OVER THE EASTERN PACIFIC AND U. WEST COAST BUILDS THE 500MB RIDGE OVER THE NATIONS CENTER FROM AROUND A 5900 METER RIDGE WED TO A 5950 METER RIDGE FRI. THE BUILDING RIDGE ALSO DEEPENS THE TROUGHING PATTERN OVER THE SOUTHEAST STATES AND FLORIDA DURING THE SAME TIME PERIOD. THE DEEPENING TROUGHING ALSO HELPS TO PUSH A FRONTAL BOUNDARY/TROUGH AND THE MOISTURE POOLING AHEAD OF IT SOUTHWARD OVER THE SOUTHEAST STATES AND COMING TO A STOP OVER THE SOUTHERN SECTION OF CENTRAL FLORIDA AND SOUTH FLORIDA BY SUN. SOME RELIEF FROM THE PERSISTENT SOUTHWEST TO WEST WIND PATTERN AS THE FRONT IS FORECAST TO HAVE PUSHED INTO SOUTH FLORIDA AND WEAK HIGH PRESSURE STRETCHING ALONG THE U.
NEAR TERM AND SHORT TERM SECTIONS HAVE BEEN UPDATED BELOW HIGH PRESSURE WILL BUILD ACROSS THE LOWER GREAT LAKES LATER TODAY. WARMER TEMPERATURES WILL RETURN FOR THE WEEKEND AS AN UPPER RIDGE EXPANDS INTO THE OHIO VALLEY. TEMPS RANGED FROM THE MID 60S TO THE LOWER 70S AS OF 07Z. THE ACTUAL COLD FRONT REMAINS TO THE NORTHWEST OF THE REGION AND WILL SLOWLY MOVE THROUGH CENTRAL INDIANA TODAY. THEN SHOULD MIX OUT AS THE SHALLOW INVERSION WEAKENS AND MIXING COMMENCES IN THE LOWER LEVELS. SHOULD FEEL MUCH MORE COMFORTABLE WITH HIGHS MAINLY IN THE LOWER 80S. FORECAST CHALLENGES ARE FEW THROUGH THE SHORT TERM WITH HIGH PRESSURE AS THE DOMINANT FEATURE.
At the surface, a cold front was located from the south plains, extending northeast into central OK.
254 AM CDT TUE JUL 21 2015 UPPER HIGH STILL CAUSING GREAT AMOUNT OF STABILITY VIA DYNAMIC COMPRESSION. THIS IS MUCH MORE EVIDENT THE FARTHER WEST ONE MOVES UNDER THE HIGH. WE WILL REMAIN ON THE PREIPHERY OF THE RIDGE AND THUS SLIGHTLY WEAKER CAPPING. AT THIS TIME THINKING IS THAT ONCE CONVECTIVE INITIATION TAKES PLACE CLOUD COVER AND EXHAUST UPPER LEVEL CLOUDS SHOULD SHADE LARGE AREAS TODAY AND SUBSEQUENT DAYS THAT LATE AFTERNOON TEMPS AND HEAT INDEX VALUES WILL STAY SLIGHTLY COOLER. THE RIDGE BACKS OFF FARTHER WEST OVER THE TEXAS PANHANDLE BUT WILL EVENTUALLY WOBBLE BACK EAST TO KEEP SOME HEAT IN THE FCAST FOR THE NEXT 8 TO 10 DAYS.
336 AM CDT TUE JUL 21 2015 CURRENT ANALYSIS CONTINUES TO INDICATE THAT HIGH PRESSURE CONTINUES TO DOMINATE THE WEATHER PATTERN ACROSS THE AREA. THE MOISTURE LOCATED ACROSS THE NORTHERN GULF COAST WILL CONTINUE TO SPREAD WEST JUST A BIT ON THE SOUTHERN PERIPHERY OF THE RIDGE. RIDGE BECOMES MORE ROBUST TOWARDS THE END OF THE WEEK CAUSING RAIN CHANCES TO GO DOWN AND TEMPERATURES TO CLIMB ONCE AGAIN. BUT OVERALL TRENDS IN THE GUIDANCE MAINTAINS THE RIDGE OVER THE AREA WITH SOME POSSIBLE WEAKENING LATE AS TROUGH DEEPENS ALONG THE EAST COAST.
258 AM EDT TUE JUL 21 2015 A COLD FRONT WILL APPROACH TODAY AND CROSS THE AREA THIS EVENING. AN UPPER LEVEL TROUGH OF LOW PRESSURE WILL REMAIN OVER THE REGION THROUGH THE END OF THE WEEK. MODELS INDICATING A PRE-FRONTAL TROF WL DVLP THIS AFTN ACRS THE ALLAGASH AND SLIDE THRU NRN MAINE LATE THIS AFTN AND EVNG. A COLD FRONT WILL BE MOVING AWAY TO THE EAST ON WEDNESDAY AS A CORRIDOR OR DRY AIR MOVES ACROSS THE AREA BRINGING PARTIAL SUNSHINE.
NORTHERN CALIFORNIA UNDER RELATIVELY LIGHT UPPER LEVEL FLOW AS IT REMAINS SANDWICHED BETWEEN MODERATELY STRONG WESTERLIES OVER THE PACIFIC NORTHWEST AND THE UPPER LOW OFF THE SOUTHERN CALIFORNIA COAST. AS WE MOVE INTO THE WARMER PART OF THE DAY.
SLIGHTLY COOLER AIRMASS BEHIND COLD FRONT WILL BRING DAYTIME HIGH TEMPERATURES DOWN TO AROUND 80 DEGREES IN MOST LOCATIONS AND LOWER 80S WITHIN THE URBAN HEAT ISLAND OF METRO DETROIT. THIS RIDGE REMAINS IN PLACE TONIGHT.
618 AM EDT TUE JUL 21 2015 A COLD FRONT WILL APPROACH TODAY AND CROSS THE AREA THIS EVENING. AN UPPER LEVEL TROUGH OF LOW PRESSURE WILL REMAIN OVER THE REGION THROUGH THE END OF THE WEEK. MODELS INDICATING A PRE-FRONTAL TROF WL DVLP THIS AFTN ACRS THE ALLAGASH AND SLIDE THRU NRN MAINE LATE THIS AFTN AND EVNG. A COLD FRONT WILL BE MOVING AWAY TO THE EAST ON WEDNESDAY AS A CORRIDOR OR DRY AIR MOVES ACROSS THE AREA BRINGING PARTIAL SUNSHINE.
350 AM EDT TUE JUL 21 2015 A COLD FRONT WILL MOVE SOUTH ACROSS THE AREA THIS MORNING. A LARGE AREA OF HIGH PRESSURE WILL BUILD OVERHEAD ON WEDNESDAY BRINGING A STRETCH OF DRY WEATHER FOR THE SECOND HALF OF THE WEEK.
SOME HINTS IN THE MESOSCALE MODELS OF THIS ACTIVITY SHIFTING EASTWARD AND THEN A SECOND ROUND OF CONVECTION DEVELOPING OVER THE MOUNTAINS FROM DIURNAL HEATING AMPLIFIED BY SOME BREAKS IN THE CLOUDS AS DRIER AND SLIGHTLY COOLER AIR ALOFT MOVES IN. GIVEN THE WARMTH ALOFT CAPES WILL BE LIMITED EVEN WITH THE HIGH DEW POINTS. BUT IT MAY WIND UP ORGANIZING BANDS INSTEAD DUE TO THE LOW INSTABILITY. ON FRI AN UPPER LEVEL HIGH WILL BE OVER WRN TEXAS WITH SSW FLOW ALOFT ACROSS NRN CO. FOR THE WEEKEND AN UPPER LEVEL HIGH WILL BE CENTERED OVER THE SRN PLAINS INTO TEXAS WITH SSW FLOW ALOFT OVER THE AREA.
324 AM CDT TUE JUL 21 2015 A cooler and drier airmass will settle over the area today and give us a day with, wait for it, no chance for rain. This will make for much more comfortable levels of humidity when combined with the lower 80 degree air temperatures forecast.
144 AM EDT TUE JUL 21 2015 A COLD FRONT WILL MOVE THROUGH THE REGION ON TUESDAY WITH A NARROW BAND OF SHOWERS AND POSSIBLY A FEW THUNDERSTORMS EXPECTED AHEAD OF THE FRONT. ONCE THE COLD FRONT MOVES OUT OF THE AREA TUESDAY NIGHT.
BEST CHANCES FOR THUNDERSTORMS TODAY MAINLY HIGHER ELEVATIONS WITH UPPER TROUGH STILL ALONG COAST.
653 AM EDT TUE JUL 21 2015 SCATTERED SHOWERS AND THUNDERSTORMS ALONG A PASSING COLD FRONT TODAY WILL BE FOLLOWED BY DRY WEATHER AND SEASONAL TEMPERATURES THE REMAINDER OF THE WEEK. SCATTERED SHOWERS AND THUNDERSTORMS WILL ACCOMPANY A COLD FRONT TODAY AS IT CROSSES THE REGION LATE THIS MORNING AND AFTERNOON. HIGH PRESSURE WILL BE THE DOMINANT FEATURE THROUGH THE SECOND HALF OF THE WEEK. RESTRICTION CHANCES WILL INCREASE LATE THIS MORNING AND DURING THE AFTERNOON AS A COLD FRONT ADVANCES ON.