Aikyam-Lab/Synoptic-Bench huggingface dataset:
A dry cold front will bring a cooler airmass to northern Utah Wednesday and Thursday before breezy conditions and warmer temperatures return late in the week. A weak cold front is draped across northwest Utah this evening.
KDRT will remain too dry in the low-levels to support low cloud decks per sounding analysis. This July Summer pattern is entrenched over the area with high pressure dominating. The position of the ridge overhead is keeping the south and southeast low level flow which is not allowing for any significant influx of drier air.
The Bermuda-Azores Ridge axis, both surface and aloft, remains entrenched across the Florida Peninsula with the Forecast Area in the northwestern periphery of the ridge. An increase in storms is expected Today over southeast Georgia as the mid level short wave trough moves across northern Georgia.
However, can't rule out an aftn shra/tsra across the high ground of the Alleghenies or sc mtns. Mdl 8h temps arnd 17-18C should translate to max temps Wed from the l80s ovr the highest terrain of the Alleghenies, to arnd 90F across the Susq Valley.
the area is now under the influence of a high pressure ridge over the west Atlantic and extending into South Florida, while mid level ridging is keeping subsidence aloft across the area. The Florida southeast coast and the metro areas will only remain a little cooler with highs in the lower 90s and heat index values near 100. The ridging aloft begins to finally weaken during the upcoming weekend, and at the same time the amount of Saharan dust will be diminishing. Under the influence of high pressure and a dry air mass for this time of year, VFR conditions expected to prevail at all terminals with generally east to southeast surface winds.
415 AM EDT Wed Jul 6 2016 Prevailing high pressure will provide very warm and moderately humid conditions to the North Country today, with afternoon high temperatures in the mid to upper 80s in most locations. A trough of low pressure approaching from southeastern Ontario will bring a slight chance of a thunderstorm tonight across northern New York, and scattered showers and thunderstorms across the North Country during Thursday afternoon.
An upper level trough will bring some cooling along with a chance of showers toward the end of the week. A deep trough will begin to take shape off the Pacific Northwest coast during the day on Thursday leading to lowering thickness values and increasing mid-level cloudiness across the northern half of the area Thursday night. A stray shower or thunderstorm may form over the Trinity Alps/Scott Mountains Thursday afternoon/evening as the trough approaches.
556 AM CDT WED JUL 6 2016 12Z TAF Cycle An upper ridge south and east of the Panhandles today while an upper trough approaches the Panhandles from the southern and central Rockies by this afternoon. High temperatures will once again near the 105 degree mark across generally the southwestern and central portions of the TX Panhandle today and tomorrow, especially in the lower terrain areas including Palo Duro Canyon and the Canadian River Valley. Beyond today, the synoptic weather pattern continues to feature a ridge of high pressure along the southern U. In the lower to mid-levels, models suggest the ridge will stay far enough south and east to allow some mid-level moisture to move over the Panhandles.
Ridging through a deep layer persists across EC FL today. The deep ridge with limited moisture depth expected to curtail coverage of afternoon showers/storms to isolated and mainly along collisions between sea/lake breezes in the late afternoon. Ridge extending aloft wl inhibit convective potential and the best chance for storm development will be over the inland counties where boundaries interact.
218 AM EDT WED JUL 6 2016 Under the influence of high pressure and a dry air mass for this time of year, VFR conditions expected to prevail at all terminals with generally east to southeast surface winds. High temperatures reached into the upper 90s, with some mesonet sites in the interior almost reaching 100 degrees! The strong upper-level ridging and midlevel Saharan dry air has helped to mitigate thunderstorm development for much of the day, outside of a couple of showers/storms that formed across the interior and Gulf Coast where local sea/lake breeze boundaries provided enough convergence to overcome a strong capping inversion in the 850-700 hPa layer.
157 AM EDT WED JUL 6 2016 A weak area of high pressure will build over the Tri-State Region through Wednesday.
A WEAK UPPER TROUGH WILL MOVE ACROSS WESTERN WASHINGTON TODAY FOR MAINLY CLOUDY SKIES AND A CHANCE OF LIGHT SHOWERS FOR THE COAST.
RIDGE AXIS OF HIGH PRESSURE OVER THE ATLANTIC AND NORTH OF DAYTONA BEACH WILL MOVE SLOWLY SOUTH TO APPROX THE CENTER OF BREVARD COUNTY TONIGHT. AN EARLIER SEA BREEZE AT THE COAST SHOULD LIMIT HIGHS TO THE LOW 80S. LOWS SHOULD BOTTOM OUT IN THE LOW AND MID 60S. RIDGE AXIS NUDGES A LITTLE SOUTH AND THE LATE DAY SEA BREEZE COLLISION SHOULD OCCUR A LITTLE FARTHER EAST OVER EC FL. LITTLE CHANGE TO RIDGING ALOFT SO WILL KEEP THUNDER OUT OF THE FORECAST. A COUPLE OF FRONTAL BOUNDARIES ARE FORECAST TO PUSH DOWN THE EASTERN SEABOARD RESULTING IN SOME MOISTURE POOLING AND BREAKS IN THE HIGH PRESSURE RIDGE. AXIS OF THE HIGH PRESSURE RIDGE WILL EXTEND ACROSS CENTRAL FLORIDA ON THU THEN WEAKEN AND WOBBLE SOUTH ON FRI AHEAD OF A WEAK FRONTAL BOUNDARY.
554 AM CDT WED APR 27 2016 THIS MORNING WATER VAPOR LOOP AND SATELLITE DATA SHOWED THE UPPER LEVEL LOW PRESSURE SYSTEM SPINNING OVER KANSAS WITH AN ASSOCIATED BAND OF SHOWERS AND THUNDERSTORMS/SQUALL LINE OUT AHEAD OF THE TROUGH OF LOW PRESSURE THAT EXTENDED SOUTH ACROSS THE OKLAHOMA AND TEXAS PAN HANDLES AND ACROSS WEST AND NORTH CENTRAL. THIS COLD FRONT WILL CONTINUE SHIFTING EAST AND INTO THE FOUR STATE REGION LATE TODAY AND DURING THE EVENING AND WILL BE A FOCUS FOR ADDITIONAL DEVELOPMENT.
HIGH PRESSURE OVER THE LAKES WILL WEAKEN INTO TONIGHT.
238 AM EDT WED APR 27 2016 A COLD UPPER LEVEL TROUGH WILL BE OVER EASTERN CANADA THROUGH MID WEEK AS CANADIAN HIGH PRESSURE REMAINS OVER OUR AREA. SFC TROFS CONTINUE TO PLAGUE CWA TONIGHT WITH NEXT BNDRY HVG GONE THRU CARIBOU AS OF 06Z AND DROPPING SOUTH. NW WINDS PICK UP BHND THE TROF TO ABOUT 10KTS. AS TROF WEAKENS AND PULLS SOUTHEAST ANOTHER WL DVLP ACRS NEW BRUNSWICK AND AFFECT ERN AND DOWNEAST ZONES IN THE AFTN AS NEXT S/WV ROTATES ARND CUT-OFF LOW. SUBSEQUENT TROF WL BRING A WIND SHIFT TO SRN ZONES ALONG WITH PRTLY-MOCLDY SKIES. NW FLOW BHND TROF MAY BRING ISOLD SNOW SHOWERS ACRS THE FAR NORTH DRG THE AFTN/OVRNGT HRS.
551 AM EDT WED APR 27 2016 A COLD UPPER LEVEL TROUGH WILL BE OVER EASTERN CANADA THROUGH MID WEEK AS CANADIAN HIGH PRESSURE REMAINS OVER OUR AREA. SFC TROFS CONTINUE TO PLAGUE CWA TONIGHT WITH NEXT BNDRY HVG GONE THRU CARIBOU AS OF 06Z AND DROPPING SOUTH. NW WINDS PICK UP BHND THE TROF TO ABOUT 10KTS. AS TROF WEAKENS AND PULLS SOUTHEAST ANOTHER WL DVLP ACRS NEW BRUNSWICK AND AFFECT ERN AND DOWNEAST ZONES IN THE AFTN AS NEXT S/WV ROTATES ARND CUT-OFF LOW. SUBSEQUENT TROF WL BRING A WIND SHIFT TO SRN ZONES ALONG WITH PRTLY-MOCLDY SKIES. NW FLOW BHND TROF MAY BRING ISOLD SNOW SHOWERS ACRS THE FAR NORTH DRG THE AFTN/OVRNGT HRS.
A WEAKENING WESTERN ATLANTIC RIDGE IS DRAPED ACROSS THE GULF COAST AND THE NORTHERN HALF OF THE FLORIDA PENINSULA. WITH THE HIGHEST WINDS ON THE OUTER FLORIDA STRAITS.
320 AM CDT WED APR 27 2016 THE MID/UPPER TROUGH RESPONSIBLE FOR THE RECENT ACTIVE WEATHER IS PROGGED TO MOVE SLOWLY EAST/NORTHEAST ACROSS THE CENTRAL PLAINS STATES TODAY. MAINTAINED MORNING POPS ACROSS PORTIONS OF CENTRAL KS WHERE STEEP MID-LVL LAPSE RATES WILL LINGER EARLY IN THE PERIOD UNDER THE MID/UPPER TROUGH.
PRECIPITATION WILL PERSIST OVER THE REGION TONIGHT AS THE LOW PRESSURE CONTINUES TO MOVE ACROSS THE CENTRAL PLAINS.
352 AM EDT WED APR 27 2016 BUILDING HIGH PRESSURE WILL RESULT IN A DRY WEDNESDAY.
/ISSUED 1121 PM CDT TUE APR 26 2016/ WATER VAPOR IMAGERY SHOWS A NEARLY STATIONARY UPPER LEVEL LOW OVER EASTERN WYOMING THIS EVENING. WITH A SECONDARY DISTURBANCE MOVING AROUND THIS LOW AND LIFTING INTO WESTERN KANSAS.
LATEST GFS/MAV HAS TRENDED WETTER AND COOLER WITH INCOMING TROUGH FOR TODAY. YESTERDAY/S GFS DUG THE TROUGH FARTHER SOUTH INTO SRN CALIF AND ARIZONA FOR TODAY. MAV/S HIGHEST POPS AND LARGEST QPF ARE IN OUR NRN-MOST MOUNTAINS WHERE AN INCOMING SURFACE COLD FRONT IS STRONGER. MAV MAX TEMPS HAVE ALSO TRENDED A LITTLE COOLER. AND ALSO COOLER THAN LATEST MET. LOCAL TEMPERATURE SCHEME FAVORS THE COOLER MAV.
Light snow over the higher elevations of the NorCal mountains.
315 AM CDT WED APR 27 2016 Upper level low pressure area across the western high plains will slowly move northeast into the central plains today.
MODIFIED ARCTIC HIGH PRESSURE WILL EXERT ITS INFLUENCE OVER THE AREA THROUGHOUT WEDNESDAY WITH A PERSISTENT. RIDGE AMPLIFICATION IN RESPONSE TO THE EXPANSIVE CLOSED LOW EJECTING OUT OF THE 4-CORNERS REGION WILL PROVIDE A CHOICE DAY ON WEDNESDAY.
650 AM EDT WED APR 27 2016 AN UPPER TROUGH WILL PROVIDE A FEW CLOUDS OVER NORTHERN NEW HAMPSHIRE AND THE WESTERN MAINE MOUNTAINS LATE TODAY. OTHERWISE A RIDGE OF COOL. CANADIAN HIGH PRESSURE WILL SETTLE IN THROUGH EARLY THIS WEEKEND.
200 AM EDT WED APR 27 2016 HIGH PRESSURE WILL REMAIN OFF THE SOUTHEAST COAST THROUGH WEDNESDAY.
420 AM CDT WED APR 27 2016 UPPER LEVEL TROUGH OVER COLORADO AND WYOMING WILL SHIFT SLOWLY EWD ACROSS THE CENTRAL PLAINS TODAY. SHORT WAVE RIDGING IN ITS WAKE WILL MOVE TO 4-CORNERS BY MIDDAY AND ERN NEW MEXICO BY EVENING. A COLD FRONT WILL MOVE INTO THE FCST AREA THIS MORNING WITH WINDS VEERING TO NW AND NORTH.
349 AM EDT WED APR 27 2016 A LARGE AREA OF HIGH PRESSURE OVER SOUTH CENTRAL CANADA WILL RIDGE SOUTHEAST INTO PENNSYLVANIA TODAY BRINGING DRY AND COOLER CONDITIONS.
A FEW LIGHT SHOWERS NOW AFFECTING THE FAR SOUTHWEST CWA THIS MORNING AS THE DEEP TROUGH BEGINNING TO LIFT NORTHEAST PER LATEST WATER VAPOR IMAGERY. THE RAIN AREA SHOULD GRADUALLY LIFT NORTH AND EAST TONIGHT AS THE UPPER TROUGH MOVES EAST. COOLER AIR WORKING INTO THIS REGION AND LOWER LEVEL THICKNESS AND WET BULB TEMPERATURES SHOW IT COULD BE POSSIBLE ON THE NORTHERN FRINGE OF THE PRECIPITATION SHIELD.
OTHERWISE, CANADIAN HIGH PRESSURE IN CONTROL THROUGH THE PERIOD, MAINTAINING DRY AND SEASONABLY COOL AIR MASS. MAY SEE A FEW CLOUDS LATE IN THE DAY NRN/NERN VT ON PERIPHERY OF UPPER LOW ACROSS ERN QUEBEC. THE DOMINATE UPPER LEVEL CLOSED LOW OVER THE CANADIAN MARITIMES WILL CONTINUE TO REINFORCE NORTHERLY FLOW ACROSS THE NORTH COUNTRY IN THE MID WEEK.
336 AM MDT WED APR 27 2016 PRETTY QUIET MORNING COMPARED TO 24 HOURS AGO AS THE PRIMARY UPPER LEVEL LOW RESPONSIBLE FOR THE SNOW AND THUNDERSTORMS YESTERDAY WEAKENS ACROSS NORTHEAST WYOMING.
241 AM EDT WED APR 27 2016 A LARGE AREA OF HIGH PRESSURE OVER SOUTH CENTRAL CANADA WILL RIDGE SOUTHEAST INTO PENNSYLVANIA TODAY BRINGING DRY AND COOLER CONDITIONS.
1216 AM CDT WED APR 27 2016 FOCUS OF THE FORECAST TODAY HAS BEEN THE IMPENDING LOW PRESSURE SYSTEM AND WARM FRONT SITTING ON THE SOUTHERN PERIPHERY OF THE LOCAL FORECAST AREA. THIS LOW AND WARM FRONT HAS NOT MADE MUCH PROGRESS NORTHWARD AS SATELLITE IMAGERY CONTINUES TO SHOW LOW LEVEL CLOUDS WRAPPING AROUND THIS LOW ACROSS OUR LOCAL PORTIONS OF NORTH CENTRAL KANSAS. AS THE LOW THEN SHIFTS EAST ON WEDNESDAY. EXPECT COOLER AIR TO FILTER IN FROM THE NORTH AND FOR MORE ISOLATED THUNDERSTORM ACTIVITY ON THE BACKSIDE OF THE DEPARTING LOW.
255 AM CDT WED APR 27 2016 WX MAP SHOWS HIGH PRESSURE TO THE EAST WITH LOW PRESSURE ACROSS THE PLAINS. WITH DEWPTS IN THE LOWER 70S. DML THE COMBINATION OF HIGH PRESSURE CENTERED OVER THE ATLANTIC OFF THE CAROLINA COAST AND A SERIES OF LOW PRESSURE SYSTEMS DEVELOPING OVER THE PLAINS STATES WILL MAINTAIN AN ONSHORE FLOW OVER THE COASTAL WATERS THROUGH THE PERIOD.
Water vapor imagery shows the upper low positioned across southwest Kansas as of Wednesday morning. Areas south of the Kansas City metro should be influenced by a dry slot working its way to the northeast ahead of the cold front. By the late afternoon, the cold front will sweep across western Missouri with convection along the frontal boundary possible for areas north of the Kansas City metro.
317 AM EDT WED APR 27 2016 AN UPPER TROUGH WILL PROVIDE A FEW CLOUDS OVER NORTHERN NEW HAMPSHIRE AND THE WESTERN MAINE MOUNTAINS LATE TODAY. OTHERWISE A RIDGE OF COOL. CANADIAN HIGH PRESSURE WILL SETTLE IN THROUGH EARLY THIS WEEKEND.
237 AM MDT WED APR 27 2016 THE AREA OF LOW PRESSURE THAT BROUGHT SHOWERS AND STORMS TO THE REGION OVER THE LAST COUPLE OF DAYS WILL SLOWLY EXIT OFF TO THE NORTHEAST THROUGH THE DAY TODAY.
THIS LOW STRATUS WILL RANGE FROM A LOW OF 300 TO 500 FEET AT KMCB AND KBTR TO HIGH OF 1500 AT KMSY AND KGPT.
WITH THE NAM BEING NOTEABLY FASTER WITH THE UPPER LOW AND DRIER FOR OUR REGION. A REINFORCING ROUND OF COOLER AIR WILL FILTER INTO THE PANHANDLES. THOUGH BREEZY NORTHWEST WINDS MAY HELP IT FEEL A LITTLE COOLER. AS THE ACTIVE UPPER AIR PATTERN BRINGS THE NEXT CLOSE UPPER-LEVEL LOW PRESSURE SYSTEM INTO THE FOUR CORNERS REGION. THIS WILL TURN FLOW ALOFT OUT OF THE SOUTHWEST AND DEVELOP AN AREA OF LOW PRESSURE AT THE SURFACE OVER EASTERN NM AND WEST TX BY TOMORROW EVENING.
131 AM EDT WED APR 27 2016 COLD FRONT SINKS SOUTH INTO AREA TONIGHT.
WILL BE IN AN ACTIVE WEATHER PATTERN THROUGH THE SHORT TERM AS A LOW PRESSURE SYSTEM CONTINUES TO MOVE ACROSS THE SOUTHERN APPALACHIAN REGION.
OTHERWISE, CANADIAN HIGH PRESSURE IN CONTROL THROUGH THE PERIOD, MAINTAINING DRY AND SEASONABLY COOL AIR MASS. MAY SEE A FEW CLOUDS LATE IN THE DAY NRN/NERN VT ON PERIPHERY OF UPPER LOW ACROSS ERN QUEBEC. UPPER LEVEL TROUGH KEEPS NW FLOW AND INFLUX OF COOLER AIR ACROSS THE NORTH COUNTRY WITH SURFACE TEMPERATURES ABOUT 5 TO 10 DEGREES BELOW NORMAL.
EXCEPT UPPER 70S TO LOWER 80S IN THE FAR NE COASTAL PLAIN IN CLOSEST VICINITY TO THE COOLER AIRMASS SAGGING SOUTHWARD FROM THE DELMARVA.
146 AM EDT WED APR 27 2016 COLD FRONT MOVING INTO CENTRAL OHIO AND SOUTHWEST PA WILL REACH THE OHIO RIVER VALLEY OVERNIGHT. HIGH PRESSURE WILL RIDGE INTO THE AREA FROM CENTRAL CANADA ON WEDNESDAY.
337 AM MDT WED APR 27 2016 THE STRONG LOW PRESSURE SYSTEM THAT BROUGHT WIDESPREAD PRECIPITATION TO THE AREA TUESDAY WAS WELL EAST OF THE AREA EARLY THIS MORNING. WITH NORTHWEST FLOW ALOFT THE CLOUDS AND PRECIPITATION ON THE BACK SIDE OF THE LOW WILL CONTINUE OVER THE AREA TODAY. A WEAK RIDGE WILL GLIDE OVER THE GREAT BASIN AND PUSH SOME OF THE MOISTURE OVER THE AREA TO THE EAST AND NORTH.
526 AM EDT WED APR 27 2016 HIGH PRESSURE BUILDING ACROSS THE EASTERN GREAT LAKES SHOULD BRING DRY WEATHER TO MOST LOCATIONS TODAY.
129 AM EDT WED APR 27 2016 COLD FRONT PUSHING THROUGH NORTHEAST PA THIS AFTERNOON AS AREA OF LOW PRESSURE MOVES TOWARDS THE COAST. NORTHWEST FLOW ALOFT WILL KEEP THE AREA SLIGHTLY COOLER THAN NORMAL.
UPPER LOW TO DRIFT ACROSS THE CENTRAL PLAINS TODAY WITH RIDGING THROUGH THE NE HALF OF THE FA. ESPECIALLY THE HIGH RESOLUTION MODELS KEEP MOST IF NOT ALL RAIN POTENTIAL SOUTH AND WEST OF THE FORECAST AREA. WITH DRY/COOL COLUMN TEMPERATURES WILL DROP OFF INTO THE 30S AND COULD SEE SOME AREAS DIPPING BRIEFLY BLO FREEZING.
504 AM EDT WED APR 27 2016 A LARGE AREA OF HIGH PRESSURE OVER SOUTH CENTRAL CANADA WILL RIDGE SOUTHEAST INTO PENNSYLVANIA TODAY BRINGING DRY AND COOLER CONDITIONS.
IT WILL BE AN ACTIVE TAF PERIOD AS A LOW PRESSURE SYSTEM MOVES THROUGH THE SOUTHERN APPALACHIAN REGION.
324 AM CDT WED APR 27 2016 HIGH PRESSURE CENTERED OFF THE ATLANTIC COAST THIS MORNING. LOW PRESSURE WAS CENTERED OVER KANSAS AT 2 AM.
355 AM EDT WED APR 27 2016 HIGH PRESSURE BUILDING ACROSS THE EASTERN GREAT LAKES SHOULD BRING DRY WEATHER TO MOST LOCATIONS TODAY.
633 AM EDT WED APR 27 2016 DRY NORTHEAST FLOW FROM HIGH PRESSURE TO THE NORTH AS FINALLY ERODED THE NORTHERN EDGE OF MVFR STRATUS ENOUGH TO CLEAR ALL TERMINALS. LOW PRESSURE WILL THEN APPROACH THE OHIO VALLEY TONIGHT WITH INCREASING CLOUDS AOA 20KFT ASSOCIATED WITH THIS SYSTEM AFTER 00Z-02Z.
THE CURRENT UPPER LOW ACROSS THE NORTHERN ROCKY SPINE WILL BE PASSING INTO THE UPPER OHIO VALLEY AS A SHALLOW OPEN WAVE TROUGH TOMORROW. THE NEXT UPPER LOW NESTLING INTO THE LOWER GREAT BASIN. THIS LOW IS MODELED TO BE JUST AS DEEP AND TO TAKE A SIMILAR PATH THAN TODAY'S LOW.
THE MAIN UPPER LOW CONTINUES TO SPIN OVER WESTERN KANSAS AND WILL GRADUALLY LIFT INTO NEBRASKA BY THIS EVENING. TEMPERATURES WILL BE A BIT WARMER TODAY WITH READINGS IN THE LOWER TO MID 50S OVER THE PLAINS. WEAK AND TEMPORARY RIDGING ALOFT FOR THIS EVENING BEFORE AN INCREASE IN MOISTURE AGAIN FROM THE WEST WITH THE NEXT STORM SYSTEM.
Instability through the morning will remain on the low end with cooler temperatures and surface dewpoints now in place but very cold temperatures aloft will support a return of instability to far eastern Kansas in advance of a westerly wind shift. and slightly better chances with northward extent closer to the upper low center. Farther west, expect a persistent area of showers and perhaps a thunderstorm on the west and southwest side of the upper low. This will keep temperatures cooler in this area as well, with highs ranging from the upper 50s in Republic county KS to the lower 70s in Anderson county. A few showers may linger in northern KS through the evening as the upper low slowly migrates east but otherwise expect a drying trend.
246 AM CDT WED APR 27 2016 Another active period of convection is shaping up, with instability/lift mechanisms present for an event this pm/evening as the primary synoptic Low circulates first the warm front, then the cold front, across the mid Mississippi river valley later today and tonight.
141 AM EDT WED APR 27 2016 HIGH PRESSURE IN CONTROL WILL KEEP SKIES MOSTLY CLEAR IN THE SHORT TERM. THIS WILL ALLOW FOR GOOD RADIATIONAL COOLING AND LOW TEMPS INTO THE LOW 20S OVER THE INTERIOR CENTRAL AND W. HIGHS ON WED WILL BE COOLEST NEAR LAKE SUPERIOR (DUE TO LIGHT NE WINDS) WITH HIGHS IN THE LOW TO MID 40S.
THE NAM/GFS ARE NOT AS FAR EAST AND NORTH WITH THE HIGHER QPF AMOUNTS. THE POP CHANGES ALSO RESULTED IN WARMER TEMPERATURES NORTH AND EAST WITH MID 50S NORTH CENTRAL. WHEN THE HIGHEST QPF AMOUNTS ARE EXPECTED.
419 AM CDT WED APR 27 2016 (Today and tonight) The Pacific cold front has moved through West Central TX and much drier air is being advected into the CWA by west winds around 10 mph. Max temperatures were kept closer to the cooler NAM MOS, with highs in the mid 80s across most of the CWA. Despite south winds of 5-10 mph tonight, relatively dry air and mostly clear skies will allow temperatures to fall into the low/mid 50s.
416 AM CDT WED APR 27 2016 NEGATIVELY TILTED AND ELONGATE UPPER TROUGH AXIS CURRENTLY EXTENDS FROM SOUTHEASTERN MONTANA INTO NORTHEAST COLORADO TO THE BASE IN THE OKLAHOMA PANHANDLE/SOUTHWESTERN KANSAS. THE COLD CLOSED UPPER LOW WILL TIGHTEN UP AND SHIFT NORTHEAST. COOLER AIR. WRAP INTO THIS LOW TONIGHT WITH DEFORMATION BAND SETTING UP ACROSS NORTHEAST NEBRASKA.
248 AM CDT WED APR 27 2016 A RIDGE OF HIGH PRESSURE WAS COVERING THE FORECAST AREA AT 07Z. ANOTHER CLOSED UPPER LOW WILL MEANDER AROUND EASTERN NEBRASKA TODAY AND TONIGHT. THIS ENERGY WILL ENCOUNTER THE VERY DRY AIR FROM THE HIGH PRESSURE OVER NORTHERN MANITOBA. WENT COOLER THAN GUIDANCE FOR MAX TEMPS WEDNESDAY.
234 PM EDT MON MAY 2 2016 A COLD FRONT WILL APPROACH FROM THE WEST THIS AFTERNOON. WARMER AND MORE HUMID UNDER A PARTLY TO MOSTLY SUNNY SKY. BECOMING WARMER/MARGINALLY UNSTABLE UNDER A PARTLY SUNNY TO MOSTLY CLOUDY SKY. COLD FRONT FM THE WNW WILL BE SLOWLY APPROACHING THE CWA THIS AFTN/EARLY THIS EVENG.
325 PM EDT MON MAY 2 2016 LOW PRESSURE WILL MOVE EAST INTO THE CANADIAN MARITIMES TUESDAY. PATCHY RAIN CONTS ACRS THE NORTH ALONG SFC TROF. MAY SEE A VRY BRIEF TIMEFRAME FOR LGT SNOW TO MIX IN, MAINLY ACRS THE HIGHER TERRAIN IN NW AROOSTOOK.
320 PM CDT MON MAY 2 2016 Today's been a bit of a cloudy cool day, with a few instability showers percolating across the region thanks to a series of troughs that recently ejected from the Desert Southwest through the Central Plains. Tonight the Canadian Plains trough will continue its way south, and will eventually swing to the southeast later Tuesday. However, this particular trough is not dragging too much cold air with it, and therefore will do more to lower humidity values and clear the skies of the cloud cover that has been hanging out for the past couple of days than anything else.
A WEAKENING LOW PRESSURE SYSTEM WILL MOVE ACROSS SOUTHERN UTAH THIS EVENING. HIGH PRESSURE WILL BUILD STARTING TUESDAY. THE NEXT PACIFIC TROUGH WILL ADVANCE INTO THE GREAT BASIN LATE IN THE WEEK.
A TROUGH OF LOW PRESSURE AND ASSOCIATED COLD FRONT WILL APPROACH THE AREA TONIGHT AND MOVE THROUGH THE REGION TUESDAY. AN APPROACHING UPPER TROUGH OF LOW PRESSURE AND ASSOCIATED COLD FRONT IS ENHANCING INSTABILITY ACROSS THE INTERIOR THIS AFTERNOON. SCATTERED SHOWERS ARE FORMING OVER THE SOUTH FORK RIDGE AS WELL AS WESTERN SISIKOU COUNTY AND MAY FLOAT OVER CENTRAL AND DEL NORTE COUNTY LATER THIS AFTERNOON. LOCALLY THERE STILL EXISTS A HOLE OVER HUMBOLDT BAY BAY BUT IT IS SLOWLY FILLING IN AND BY LATE TONIGHT THE LOW CLOUDS AND FOG SHOULD HAVE A GOOD GRIP ON MOST OF THE LITTORAL ZONE OF THE ENTIRE NORTH COAST. THIS IS MAINLY IN RESPONSE TO THE PINCHING OF AN UPPER LOW PRESSURE SYSTEM THAT WILL CUT OFF AND MOVE INTO THE BAY AREA.
330 PM EDT MON MAY 2 2016 WARM SOUTHWEST FLOW WILL PREVAIL AHEAD OF A SLOW-MOVING COLD FRONT. AND ASSOCIATED WAVES OF LOW PRESSURE. FINALLY GIVING THE STATIONARY FRONT CURRENTLY STRETCHING FROM EAST TX TO THE LOWER GREAT LAKES A KICK TO THE EAST. THE SLOWER PASSAGE OF THE COLD FRONT SHOW IN THE ECMWF SUGGESTS THE POTENTIAL FOR LINGERING SHOWERS IN THE COASTAL PLAIN TUESDAY NIGHT AS A WEAK WAVE OF LOW PRESSURE DEVELOPS ALONG THE FRONT WHILE IT APPROACHES THE COAST.
Temperatures will be on the cool side again tonight with lows in the low to mid 40s. The main upper low will then track to the southeast across the Ohio valley region.
As another short wave drops southeast across the region as it rotates around the southwest flank of a huge upper low just north of the Great lakes region on Tuesday, small precipitation chances are possible over parts of southeast IL, southwest IN, and northwest KY where deep layer moisture will be greatest.
302 PM CDT MON MAY 2 2016 COOL UPPER LOW MOVING THROUGH THE REGION MONDAY AFTERNOON WILL EXIT THE AREA TONIGHT. THE IMPACT FOR THE JAMES RIVER VALLEY WILL BE A BACK DOOR COLD FRONT THAT WILL BRING GUSTY NORTH WINDS OF 20 TO 30 MPH TO THE WESTERN DEVILS LAKE AND THE JAMES RIVER VALLEY REGIONS DURING TUESDAY AFTERNOON. RELATIVE HUMIDITY WILL FALL INTO THE LOWER 20 PERCENT RANGE.
THE MAIN COLD FRONT IS STILL BACK ACROSS MS/WESTERN TN BUT IT IS EXPECTED TO MOVE EASTWARD OVER THE NEXT 24-36HOURS. AS FOR TODAY THE HIGH RES MODELS ARE IN FAIRLY GOOD AGREEMENT SHOWING A DIURNAL TREND WITH THESE SHOWERS AND THUNDERSTORMS.
132 PM EDT MON MAY 2 2016 AVIATION LOW PRESSURE MOVING ACROSS OHIO WILL QUICKLY MOVE EAST TO PENNSYLVANIA TODAY AND RAIN WILL END THIS MORNING AND THEN SKIES WILL BECOME PARTLY SUNNY.
OTHERWISE WEAK HIGH PRESSURE WILL BRING DRIER WEATHER AND WARMER TEMPERATURES THROUGH TUESDAY.
423 PM EDT MON MAY 2 2016 A COLD FRONT WILL APPROACH FROM THE WEST NORTHWEST THIS EVENING.
HIGHS TODAY IN THE LOW TO MIDDLE 70S LOOK GOOD AT THIS TIME.
COLD FRONT WILL WORK THROUGH THE REGION TOMORROW AFTERNOON. COLD FRONT DROPS SOUTH THROUGH THE AREA TUESDAY NIGHT. OTHERWISE MIDDLE PORTION OF THE FORECAST PERIOD CONTINUES TO LOOK DRY AS STRONG UPPER RIDGE SHIFTS EAST ACROSS THE PLAINS.
UPPER LEVEL HIGH PRESSURE WILL MAINTAIN FAIR WEATHER ACROSS THE FORECAST AREA THIS MORNING WITH SUNNY SKIES. MEANWHILE AN UPPER LEVEL TROUGH IS APPROACHING THE WEST COAST. WARMER TEMPS WITH HIGHS IN THE MID 70S TO MID 80S. THE UPPER RIDGE OVER THE PACIFIC NORTHWEST AND SOUTHWEST CANADA WILL GRADUALLY SHIFT EAST TODAY AND TONIGHT. NORTHEAST OREGON AND SOUTHEAST WASHINGTON WILL REMAIN FAIR AND DRY TODAY THROUGH TUESDAY MORNING DUE TO A DRY AIR MASS AND CONTINUED SUBSIDENCE ASSOCIATED WITH THE UPPER RIDGE.
Upper trough and associated cold front will continue to slowly approach the local area through the rest of the afternoon and into the evening.