Aikyam-Lab/Synoptic-Bench huggingface dataset:
AS UPPER LOW OVER NORTH MISSISSIPPI MOVES ACROSS THE AREA THIS EVENING AND TONIGHT. EXPECT CONTINUED COOLING/LIFT ALOFT TO HELP SATURATE THE LOW LEVELS AND LEAD TO SNOW REACHING THE SURFACE THROUGHOUT THE ADVISORY AREA. LATEST REPORTS FROM WEST TENNESSEE INDICATE 1 INCH OF SNOW ALREADY IN CHESTER COUNTY NEAR THE CORE OF THE UPPER LOW.
1218 AM EST THU FEB 26 2015 LOW PRESSURE WILL MOVE EAST THROUGH THE MARITIMES TONIGHT.
Highs on Thursday will range from the teens along the Nebraska border to the lower 20s in east central and central Kansas.
THE TRACK OF THE LOW SHIFTED SOME ALLOWING VERY WARM AIR TO ENTER SOUTHWEST IOWA. PARTS OF THE FORECAST ARE REACHED THE UPPER 40S AND AS THE LOW SHIFTED EAST TEMPS FELL ABOUT 15 DEGREES IN A SHORT TIME.
A strong cold front is currently near Topeka Kansas and quickly moving southward. A few remaining flurries will remain possible across the eastern Ozarks as an upper level short wave trough tracks into northeastern Missouri.
AS CANADIAN BASED HIGH PRESSURE INFLUENCES BECOME MORE ESTABLISHED ACROSS THE MID STATE. EXPECT DRY CONDITIONS TO PREVAIL THRU SAT NIGHT WITH QUASI NWLY FLOW ALOFT EVOLVING TO SWLY FLOW BY SAT NIGHT AS DEEP UPPER LEVEL CLOSED LOW DEVELOPS ACROSS SRN CA. HIGHS WILL BE MAINLY IN THE LOW TO MID 30S THIS AFTERNOON. AS SFC RIDGING INFLUENCES BECOME MOST PRONOUNCED ACROSS THE MID STATE. MAINLY BELOW FREEZING. MID 20S N TO AROUND FREEZING S. WITH MOST LOCATIONS ABOVE FREEZING SAT NIGHT AS SLY FLOW SFC/ALOFT BECOMES MORE ESTABLISHED.
356 AM EST THU FEB 26 2015 A WEAK AREA OF LOW PRESSURE WILL MOVE EAST ACROSS THE OHIO VALLEY TODAY.
ANOTHER TROUGH WILL MOVE NORTH OF THE AREA AND SOME OF THE ENERGY ASSOCIATED WITH IT WILL LEAD TO A CONTINUES CHANCE OF SOME LIGHT SNOW SHOWERS ACROSS FAR NORTHEAST TENNESSEE AND SOUTHWEST VIRGINIA WITH THE BEST CHANCES REMAINING IN THE HIGHER ELEVATIONS.
WITH THE HIGHEST TOTALS OF UP TO 10 INCHES OBSERVED ALONG OUR SOUTHERN MOST COUNTIES. THE UPPER LEVEL TROUGH IS EXPECTED TO MOVE TO THE EAST- NORTHEAST ACROSS ALABAMA DURING THE NEXT FEW HOURS.
KEEPING THE TIMING THROUGH 15Z WHEN TEMPS ARE PROGGED TO GO ABOVE FREEZING. SO SPEAKING OF TEMPERATURES GOING ABOVE FREEZING. WHICH RIGHT NOW IS SOMEWHERE IN THE LOW TO MID 20S.
440 AM EST THU FEB 26 2015 LOW PRESSURE WILL MOVE UP THE ATLANTIC COAST TODAY. COLD AND DRY HIGH PRESSURE WILL BUILD INTO THE AREA FOR THE WEEKEND. THIS IS SUPPORTED BY LOCAL METARS THAT NOW INDICATE MAINLY LIGHT RAIN/FREEZING RAIN/DRIZZLE ACROSS THE ENTIRE CWA. TEMPERATURES ACROSS THE SOUTHERN HALF OF THE CWA WILL REMAIN ABOVE FREEZING THIS MORNING. WHILE THE NORTHERN HALF MAY APPROACH FREEZING.
145 AM EST THU FEB 26 2015 VERY LIGHT SNOW IS POSSIBLE OVER THE REGION TODAY AS LOW PRESSURE MOVES OFF THE CAROLINA COAST AND THE UPPER JET STREAM FAVORS BROAD BUT WEAK LIFT OVER THE STATE.
1258 AM EST THU FEB 26 2015 LOW PRESSURE OVER NORTHERN FLORIDA THIS EVENING WILL TRACK NORTHEASTWARD ALONG THE GEORGIA AND SOUTH CAROLINA COAST LATE TONIGHT.
A REINFORCING COLD FRONT WILL MOVE ACROSS SOUTHEAST TEXAS BY LATE TOMORROW MORNING WITH NORTH WINDS GUSTING TO NEAR 20 KNOTS IN THE AFTERNOON. TEMPERATURES SHOULD DIP TO FREEZING AROUND CROCKETT AND MADISONVILLE AND POSSIBLY EVEN CONROE. NEXT COLD FRONT IS MOVING THROUGH CENTRAL OKLAHOMA AND SHOULD MOVE THROUGH SETX THURSDAY AFTERNOON.
HIGH PRESSURE RIDGE AXIS REMAINS WEST OF WI OVERNIGHT TONIGHT AS SHORT WAVE RIDGING SETTLES IN.
THE DEVELOPING NWLY TROF DIPS DOWN. WITH MORE ENERGY PINWHEELING AROUND THE BASE OF THE MEAN LONG WAVE TROF THRU TMRW NIGHT (EARLY). TRACE (SOUTH) TO HALF INCH (NORTH) SHOULD COVER THE LOW AND HIGH END RANGES OF THE ANTICIPATED SNOW.
SOME AREAS OF DENSE FOG HAVE FORMED ACROSS SOME OF THE COUNTIES SOUTH OF MEMPHIS NEAR THE MISSISSIPPI RIVER SO WILL ISSUE A FREEZING FOG ADVISORY FOR THESE AREAS UNTIL 9 AM CST. A COLD FRONT CURRENTLY EXTENDS FROM SOUTHEAST MISSOURI THROUGH SOUTHWEST ARKANSAS AND INTO NORTHEAST TEXAS. AS THIS COLD FRONT MOVES THROUGH THE FORECAST AREA THERE COULD BE SOME SNOW FLURRIES THAT DEVELOP.
314 AM CST THU FEB 26 2015 SOME CONCERNS THIS MORNING WITH PATCHY FREEZING FOG DUE TO SNOW PACK AND PARTIAL CLEARING SKIES MAINLY NORTH OF THE INTERSTATE 20 CORRIDOR THIS MORNING. HAVE HANDLED THIS IN THE WEATHER GRIDS SHORT OF ISSUING A FREEZING FOG ADVISORY FOR THIS MORNING AS A COLD FRONT CURRENTLY ACROSS SOUTHEAST OKLAHOMA AND NORTH CENTRAL TEXAS WILL BE MOVING SOUTHEAST INTO THE REGION LATER THIS MORNING. THIS FRONT SHOULD MIX OUT ANY FREEZING FOG CONCERNS SHORTLY AFTER SUNRISE.
1121 PM CST WED FEB 25 2015 MAINLY CLEAR SKIES ACROSS THE FORECAST AS CENTER OF RIDGE AS THE TEMPS DROP QUICKLY AFTER SUNSET. AN AREA OF HIGH PRESSURE WILL SINK SOUTHEASTWARD FROM SOUTHERN ALBERTA/SASKATCHEWAN INTO THE DAKOTAS BY MID DAY TOMORROW. EXCEPT ALONG THE LAKE WHERE SLIGHTLY WARMER TEMPERATURES ARE EXPECTED.
THE ARCTIC FRONT EXTENDING WESTWARD FROM THE LOW ACROSS FAR NORTHERN KANSAS. THE POLAR AIRMASS WILL BECOME ENTRENCHED ACROSS THE KANSAS REGION THURSDAY WITH HIGHS CONFINED TO THE LOWER-MIDDLE 20S. WITH A LARGE UPPER TROUGH/LOW CARVING OUT OVER THE SOUTHWEST. THE LOW-LEVEL COLD AIRMASS WILL REMAIN IN PLACE THROUGH THE WEEKEND. A WEAKER PIECE OF ENERGY WILL EJECT OUT OF THE DEVELOPING WESTERN STATES UPPER TROUGH.
Can't rule out a few amounts a bit higher than this near and north of Kirksville, but with temperatures having risen quite a bit warmer than was expected this afternoon, snow that falls initially will have to battle some warmer ground temperatures and may melt at first. With the track of the higher amounts continuing to shift east, a few more counties over north central MO were removed from the winter weather advisory.
THIS EVENING THROUGH THURSDAY NIGHT UPPER AIR ANALYSIS SHOWS A BROAD UPPER TROUGH ACROSS THE ERN TWO THIRDS OF THE CWA WITH NW FLOW CONTINUING ACROSS THE NRN PLAINS.
1018 PM CST WED FEB 25 2015 THE CLEARING LINE OF THE LOW STRATUS CONTINUES TO MAKE GOOD PROGRESS SE INTO FAR SRN AR AND ERN TX. PARTICULARLY ON BRIDGES AND OVERPASSES AS WELL AS SOME OF THE AREA ROADWAYS. AS AREAS ACROSS DEEP E TX/NCNTRL LA MAY STAY JUST ABOVE FREEZING AS THE LOW STRATUS WILL LIKELY HANG TOUGH OVER THESE AREAS OVERNIGHT. IS BELOW FREEZING WITH BRF LIGHT ICE.
CHATTANOOGA AIRPORT, TN 28 40 24 37 / 100 10 10 10 KNOXVILLE MCGHEE TYSON AIRPORT, TN 28 37 22 33 / 100 30 10 10 OAK RIDGE, TN 28 37 21 32 / 100 30 10 10 TRI CITIES AIRPORT, TN 27 35 21 29 / 100 40 10 10 NC.
1211 AM EST THU FEB 26 2015 UPPER AIR PATTERN CONSISTS OF A TROUGH IN THE SOUTHERN PLAINS EMBEDDED IN A DEEP LONGWAVE TROUGH OVER MOST OF THE U.
346 AM EST THU FEB 26 2015 VERY LIGHT SNOW IS POSSIBLE OVER THE REGION TODAY AS LOW PRESSURE MOVES OFF THE CAROLINA COAST AND THE UPPER JET STREAM FAVORS BROAD BUT WEAK LIFT OVER THE STATE.
SFC COLD FRONT HAS SLID SOUTH OF THE CWFA TODAY LEAVING NORTHERLY LLVL WINDS IN ITS WAKE.
After a brief respite from the cold weather, Arctic air has returned with a vengeance behind a cold front that swept across the area. Some very light snow or flurries and perhaps a brief period of freezing drizzle was accompanying this intrusion of Arctic air.
TEMPERATURES WILL REMAIN RELATIVELY MILD TONIGHT WITH LOWS IN THE LOWER TO MID 30S FOR THE MOST PART. A WEAK COLD FRONT WILL SLIDE THROUGH SOUTHEAST MICHIGAN NEAR SUNRISE WEDNESDAY. NORTHWEST WINDS OFF FROZEN SAGINAW BAY WILL LIKELY KEEP NORTHERN THUMB REGION NOTICEABLY COOLER.
HIGH PRESSURE AND NEAR RECORD WARM TEMPERATURES ARE EXPECTED TO RETURN THIS WEEKEND.
311 PM CDT TUE MAR 10 2015 TEMPERATURES SOARED TODAY AHEAD OF THE COLD FRONT THAT MOVED THROUGH. THE COOLER AIR BEHIND THE FRONT IS AT -2 TO -4C AT 850 MB COMPARED TO +4 TO +6 PREFRONTAL. WITH THE RIDGE OF HIGH PRESSURE OVER THE REGION ON WEDNESDAY THERE WILL BE NO PRECIPITATION. THERE WAS A VORT MAX MOVING ALONG THE INTERNATIONAL BORDER REGION ALONG WITH AN UPPER LEVEL TROF. THE FRONT WILL CONTINUE ACROSS THE FORECAST AREA TODAY ASSISTED BY ANOTHER UPPER LEVEL TROF. WAA IS EXPECTED THROUGH THE DAY WHICH WILL LEAD TO WARMER TEMPERATURES.
A SERIES OF UPPER LEVEL LOWS HAVE BEEN TRACKING OUT OF THE GULF AND ACROSS THE REGION WITH SHOWERS AND AREAS OF RAIN. IN ADDITION SE TX WILL BE A BIT COOLER BEHIND THE WEAK FRONT OVERNIGHT.
Many valleys in western Montana and central Idaho could see high temperatures in the lower 60s.
330 PM CDT TUE MAR 10 2015 ALONG A WEAK LOW LEVEL CONVERGENCE BOUNDARY AND THETA-E RIDGE.
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
324 PM EDT TUE MAR 10 2015 A LOW PRESSURE SYSTEM WILL MOVE FROM THE OHIO VALLEY.
Cloud cover and precip during most of the day will keep temps in the low to mid 50s across the southeastern half of the CWA.
253 PM CDT Tue Mar 10 2015 A somewhat stationary upper trough continues to linger over the region today, with the trough axis sitting over our northwestern zones this afternoon. Currently seeing some showers and isolated thunderstorms across the higher terrain regions thanks to some weak upper forcing and afternoon sfc heating. The trough axis will shift slightly to the east tonight, becoming a cutoff low Wednesday then meander over the Red River area through the remainder of the week.
340 PM EDT TUE MAR 10 2015 LOW PRESSURE WILL MOVE UP THE OHIO VALLEY THIS EVENING AS ANOTHER LOW TRACKS EAST ACROSS EASTERN CANADA. THE CANADIAN LOW WILL FORCE A COLD FRONT TO DROP ACROSS THE AREA WEDNESDAY.
250 PM CDT TUE MAR 10 2015 THE 19Z SURFACE ANALYSIS INDICATED THAT THE FORECAST AREA WAS WELL SOUTH OF THE WARM FRONT THAT WAS EXTENDING FROM WEST TO EAST ACROSS SOUTH CENTRAL KENTUCKY. A WEAK TRAILING COLD FRONT WAS MOVING SOUTHEAST THROUGH WEST TENNESSEE AND INTO NORTHWEST MISSISSIPPI. TEMPS ACROSS THE FORECAST AREA WERE IN THE LOW TO MID 60S. THE MODELS ARE IN FAIR AGREEMENT INVOLVING SLOWLY MOVING THE WEAK COLD FRONT THROUGH NORTH ALABAMA BETWEEN THE 12Z AND 18Z TIME FRAME ON WEDNESDAY.
AS THE EARLIER FORECAST HAS STATED A SLIGHTLY HIGHER BET OF RAIN IN THE LOWER VALLEY WHERE A DEEPER LAYER OF MOISTURE RESIDES. UPPER LEVEL TROUGH CONTINUES TO DIVE ACROSS TEXAS.
306 PM PDT Tue Mar 10 2015 A weak weather system will move through the region tonight through Wednesday bringing some light precipitation and cooler temperatures.
WITH A STRONG SUBTROPICAL RIDGE REMAINING ANCHORED TO THE EAST AND ANOMALOUS TROUGHING OVER MEXICO.
HIGH PRESSURE CROSSES MIDWEEK. FOLLOWED BY A LOW PRESSURE SYSTEM LATE IN THE WEEK. MODELS ARE SHOWING THE HEAVIEST PRECIPITATION FROM THE WARM FRONT STRETCHING FROM NORTHERN KY AND SOUTHEAST OH INTO THE NORTHERN WEST VIRGINIA MOUNTAINS. AS THE LOW PRESSURE MOVES ACROSS TONIGHT A HEAVY BAND OF PRECIPITATION WILL SWING THROUGH. A COLD FRONT WILL CONTINUE TO PRODUCE COPIOUS ACCUMULATIONS OF RAIN MAINLY ACROSS THE SOUTHERN COAL FIELDS AND EXTREME VA COUNTIES EARLY WEDNESDAY.
1228 PM CDT TUE MAR 10 2015 EVEN WARMER TEMPERATURES ARE EXPECTED TODAY.
UPPER LEVEL TROUGH CONTINUES TO DIVE ACROSS TEXAS.
353 PM EDT TUE MAR 10 2015 WEAK LOW PRESSURE MOVING SOUTH OF KEYSTONE STATE TONIGHT WILL BRING SOME RAIN TO THE AREA INTO EARLY WEDNESDAY MORNING.
341 PM MDT TUE MAR 10 2015 SUNNY SKIES AND MILD TEMPERATURES CONTINUED TODAY AS A RIDGE OF HIGH PRESSURE PERSISTED OVER THE WEST COAST. THOUGH PROBABLY A BIT COOLER THAN MOS GUIDANCE GIVEN TREND FROM THE LAST TWO NIGHTS. THE WEATHER PATTERN STARTS TO SHIFT WEDNESDAY AS A PACIFIC TROUGH BEGINS TO PUSH EASTWARD THROUGH THE RIDGE CAUSING IT TO FLATTEN AND FORCING ITS AXIS EAST OF THE DIVIDE. FLOW ALOFT TURNS TO THE SOUTHWEST AND WARMER AIR IS ADVECTED ACROSS THE FORECAST AREA. THIN CIRRUS WILL SWEEP OVER THE REGION AHEAD OF THE TROUGH. CLOUDS WILL INCREASE AS A WEAKENED PACIFIC TROUGH PUSHES ACROSS THE GREAT BASIN DRIVING A COOL FRONT ACROSS THE FORECAST AREA.
530 PM EDT TUE MAR 10 2015 LOW PRESSURE EMERGING FROM THE SOUTHERN PLAINS WILL SPREAD RAIN OVER THE REGION TONIGHT. WARMER WEATHER WILL CONTINUE THROUGH THE WEEK.
240 PM EDT TUE MAR 10 2015 LOW PRESSURE EMERGING FROM THE SOUTHERN PLAINS WILL SPREAD RAIN OVER THE REGION TONIGHT. WARMER WEATHER WILL CONTINUE THROUGH THE WEEK.
1220 PM CDT TUE MAR 10 2015 ONE MORE UPDATE TO REFLECT RAPIDLY RISEING TEMPS AHEAD OF COLD FRONT.
AS UPPER TROUGH OVER UPPER RED RIVER VALLEY OF TX/OK BECOMES A CLOSED LOW.
244 PM CDT TUE MAR 10 2015 WITH A PERSISTENT UPPER LOW IN PLACE OVER THE SOUTHERN PLAINS.
121 PM MDT TUE MAR 10 2015 SHORT WAVE RIDGING WILL BUILD INTO THE AREA THROUGH THE PERIOD BRINGING CONTINUED DRY AND MOSTLY CLEAR CONDITIONS TO THE CWA. DEVELOPING TROUGH WILL BRING INCREASING SOUTHERLY WINDS POSSIBLY BECOMING SUSTAINED AT AROUND 20 MPH FOR AN HOUR OR TWO IN PORTIONS OF YUMA AND DUNDY COUNTY. THIS EVENTUALLY DEVELOPS INTO A CLOSED UPPER LOW SOUTH OF THE COUNTRY.
1224 PM CDT TUE MAR 10 2015 ONE MORE UPDATE TO REFLECT RAPIDLY RISING TEMPS AHEAD OF COLD FRONT.
352 PM CDT TUE MAR 10 2015 HIGH PRESSURE WILL PUSH SOUTH FROM DAKOTAS OVERNIGHT TONIGHT. COLD ADVECTION WILL PRECEDE THE ARRIVAL HIGH PRESSURE TONIGHT AND WILL RESULT IN MORE LIMITED MIXING TO AROUND 925 MB ON WEDNESDAY. THE 925 MB TEMPERATURES WILL BE AROUND 4 C COOLER ON WEDNESDAY THAN TODAY AND WITH LIGHT SOUTHEAST WINDS ORIGINATING FROM THE HIGH. WILL LEAD TO PLEASANT YET COOLER TEMPERATURES THAN TODAY.
ISSUED BY NATIONAL WEATHER SERVICE DENVER CO 248 PM MDT TUE MAR 10 2015 HIGH PRESSURE AT THE SURFACE AND ALOFT WILL REMAIN OVER THE AREA THROUGH TOMORROW AFTERNOON. GRADIENTS WILL SWITCH TO SOUTHERLY TOMORROW AS A LEE TROUGH OF LOW PRESSURE DEVELOPS OVER THE NORTHEAST COLORADO PLAINS. LEADING TO HIGH TEMPERATURES ABOUT 5 DEGREES WARMER THAN THIS AFTERNOON.
1225 PM CDT TUE MAR 10 2015 TEMPERATURES TRENDING A BIT WARMER THAN FORECAST. CLOUDS ASSOCIATED WITH A WEAK TROUGH PASSAGE ARE MINIMAL THIS MORNING. THE SURFACE REFLECTION IS IN THE FORM OF A WEAK COLD FRONT STRETCHING FROM NEAR BRANDON MANITOBA.
THE COMBINATION OF DIURNAL HEATING AND COOL TEMPS ALOFT ASSOCIATED WITH A REMNANT UPPER TROUGH WILL LEAD TO WEAK INSTABILITY ACROSS THE PANHANDLES THIS AFTERNOON AND EARLY EVENING. AN UPPER LEVEL TROF WILL CONTINUE MEANDERING AROUND THE REGION TODAY. THE CLOSE PROXIMITY OF THIS TROF MAY RESULT IN THE DEVELOPMENT OF AN ISOLD SHOWER OR TSTM.
618 PM EDT TUE MAR 10 2015 LOW PRESSURE WILL MOVE UP THE OHIO VALLEY THIS EVENING AS ANOTHER LOW TRACKS EAST ACROSS EASTERN CANADA. THE CANADIAN LOW WILL FORCE A COLD FRONT TO DROP ACROSS THE AREA WEDNESDAY.
THE LOWER LEVELS OF THE ATMOSPHERE REMAIN FAIRLY DRY AND THIS IS SUPPORTED BY THE MODELS, THEREFORE WERE NOT EXPECTING MUCH IF ANYTHING FOR THE EVENING HOURS. RAIN WILL AFFECT MOST AREAS TONIGHT WITH THE HIGHEST TOTALS AT THE COAST AND HIGHER TERRAIN. ALSO WINDS WILL INCREASE OVER THE HIGHER TERRAIN EAST OF THE CASCADES WITH 700 MB WINDS BETWEEN 30-40 KTS, BUT REMAINING BELOW ADVISORY CRITERIA. THE UPPER TROUGH WILL SHIFT EAST WEDNESDAY NIGHT AND UPPER RIDGING BUILDS INTO THE AREA.
LOW TEMPERATURES TONIGHT WILL BE IN THE MID 30S WITH HIGH TEMPERATURES ON WEDNESDAY RISING INTO THE LOW 50S UNDER MOSTLY SUNNY SKIES. A LIMITING FACTOR FOR THE FOG DEVELOPMENT IS THE WEAK COLD FRONT WHICH WILL BE MOVING THROUGH THE AREA BETWEEN 03Z AND 06Z. THINK MOST 12Z GUIDANCE IS A BIT OVERDONE WITH JUST HOW MUCH COOLER HIGH TEMPERATURES WILL BE GIVEN THE DRY AIR ADVECTION DURING THE DAY TOMORROW. HIGH PRESSURE WILL BE SLIDING ACROSS THE GREAT LAKES.
AND HIGH PRESSURE AT THE SFC. ON THU THERE WILL BE RAMP-UP OF POPS AND CLOUD COVER AS ANOTHER LOW PRESSURE SYSTEM EJECTS FROM A PERSISTENT SWRN CONUS LONGWAVE MID/UPPER TROF. BY 13Z-15Z WEDNESDAY, THE MEAN TROUGH AXIS SHOULD MOVE WELL ENOUGH EAST TO BRING A RAPID ADJUSTMENT TO VFR CEILINGS AND VISIBILITIES.
AN APPROACHING LOW PRESSURE SYSTEM WILL BRING RAIN SHOWERS TO NORTHWEST CALIFORNIA STARTING TONIGHT THROUGH LATE WEDNESDAY NIGHT.
240 PM EDT TUE MAR 10 2015 WEAK LOW PRESSURE MOVING SOUTH OF KEYSTONE STATE TONIGHT WILL BRING SOME RAIN TO THE AREA INTO EARLY WEDNESDAY MORNING.
335 PM EDT TUE MAR 10 2015 WITH UPPER RIDGING OVER THE BAHAMAS AND A DEEP TROUGH OVER THE CENTRAL PLAINS. SOUTHWEST FLOW ALOFT FROM THE LOWER MISSISSIPPI TO THE TENNESSEE VALLEYS WILL KEEP A STREAM OF GULF MOISTURE INTO THE DEEP SOUTH WITH LITTLE VARIATION IN OVERALL PATTERN. AS IS TYPICAL GFS IS ON THE LOW SIDE WITH AROUND 200 WITH THE NAM QUITE A BIT HIGHER WITH 700-800 J/KG.
619 PM EDT TUE MAR 10 2015 WEAK LOW PRESSURE MOVING SOUTH OF KEYSTONE STATE TONIGHT WILL BRING SOME RAIN TO THE AREA INTO EARLY WEDNESDAY MORNING.
332 PM CDT TUE MAR 10 2015 WEAKLY CAPPED CONVECTIVE INSTABILITY WITH A MINOR BUT PERSISTENT UPPER TROUGH OVERHEAD COULD LEAD TO ISOLATED SHOWERS OR EVEN THUNDER MAINLY BENEATH UPPER COLD POOL ON THE CAPROCK LATE THIS AFTERNOON AND EARLY THIS EVENING.
133 PM EDT TUE MAR 10 2015 LOW PRESSURE WILL MOVE UP THE OHIO VALLEY THIS AFTERNOON AND EVENING AS ANOTHER LOW TRACKS EAST ACROSS EASTERN CANADA. THE CANADIAN LOW WILL FORCE A COLD FRONT TO DROP ACROSS THE AREA WEDNESDAY.
1216 PM CDT TUE MAR 10 2015 CURRENT SURFACE ANALYSIS HAS A WEAK TROUGH ACROSS CENTRAL NEBRASKA. WITH WEST TO NORTHWEST WINDS BEHIND THE TROUGH. WHERE WINDS HAVE GONE CALM TEMPERATURES ARE MUCH COOLER THAN THE REST OF THE AREA.
331 PM CDT TUE MAR 10 2015 A WEAK FRONTAL BOUNDARY SLIDES SOUTH ACROSS THE FORECAST AREA TONIGHT INTO EARLY WEDNESDAY USHERING IN SLIGHTLY COOLER TEMPERATURES FOR WEDNESDAY BUT WELL ABOVE NORMAL.
334 PM EDT TUE MAR 10 2015 ABOVE NORMAL TEMPERATURES WILL CONTINUE ACROSS THE NORTH COUNTRY TODAY AND WEDNESDAY AS A WEST TO SOUTHWEST FLOW PATTERN BRINGS WARMER AIR INTO THE REGION. BUT THERE MAY BE A FEW MOUNTAIN SNOW SHOWERS ON WEDNESDAY AS A WEAK TROUGH OF LOW PRESSURE PASSES JUST TO OUR NORTH.
231 PM MDT TUE MAR 10 2015 UPPER RIDGE FROM THE SOUTHERN CALIFORNIA COAST STRETCHING TO THE NORTHERN ROCKIES WILL PUSH EAST TO CROSS OVER THE STATE WEDNESDAY. A COUPLE DEGREES WARMER THAN LAST NIGHTS READINGS. CONTINUED CLEAR SKIES AND LIGHT WINDS TOMORROW WILL LIKELY PRODUCE THE WARMEST MAX TEMPERATURES OF THE WEEK AS THEY PUSH A FEW DEGREES WARMER OVER TODAY'S READINGS. THE UPPER RIDGE SHIFTS INTO THE CENTRAL PLAINS STATES AS AN UPPER LEVEL TROUGH MOVES INTO THE WESTERN U.
CURRENT RAINFALL ESTIMATES FROM AROUND THE AREA SHOW THE HIGHEST AMOUNTS OF RAINFALL HAVE OCCURRED SOUTH OF THE NEW ORLEANS AND LAKE PONTCHARTRAIN STRETCHING NORTH AND EAST AFFECTING MOSTLY THE EASTERN HALF OF THE FORECAST EARLIER TODAY AND LATE LAST NIGHT. AS FOR TEMPS WILL LEAN TOWARDS THE WARMER MAV GUIDANCE DURING THE DAY. AND THE WARMER MET GUIDANCE EACH NIGHT DUE TO CLOUDS AND RAIN.
332 PM EDT TUE MAR 10 2015 LOW PRESSURE WILL TRACK NORTH OF THE REGION TONIGHT AND DRAG A WARM FRONT ACROSS THE AREA THIS EVENING. A COLD FRONT WILL CROSS THE REGION WEDNESDAY MORNING.
311 PM PDT TUE MAR 10 2015 LOW PRESSURE WILL MOVE OVER NORTHERN CALIFORNIA AND NEVADA LATE TONIGHT AND WEDNESDAY, BRINGING LIGHT RAIN AND HIGHER ELEVATION SNOW, ESPECIALLY IN THE SIERRA AND NORTH OF INTERSTATE 80. A WEAK SYSTEM COMPOSED OF A LEAD DISTURBANCE FOLLOWED BY A TROUGH AXIS IS STILL ON TRACK TO MOVE OVER NORTHERN CALIFORNIA AND NEVADA LATE TONIGHT AND WEDNESDAY. THE PROBLEM FOR THE SYSTEM IS THAT IT WILL BE RUNNING INTO A LARGE-SCALE WESTERN NORTH AMERICAN RIDGE AND WEAKENING/FRACTURING AS IT MOVES INLAND ON WEDNESDAY. AFTER THE LEAD DISTURBANCE PASSES BY WEDNESDAY MORNING, SNOW LEVELS SHOULD RISE A BIT WITH ANY SNOW ON NORTHERN SIERRA PASSES MELTING WITH THE HIGHER MARCH SUN ANGLE AND LESSENING PRECIPITATION RATES. THE MAIN TROUGH AXIS WILL MOVE THROUGH IN THE AFTERNOON AND EARLY EVENING, WITH SHOWERS TAPERING OFF RAPIDLY IN THE EVENING.
153 PM MDT TUE MAR 10 2015 UPPER RIDGE FROM THE SOUTHERN CALIFORNIA COAST STRETCHING TO THE NORTHERN ROCKIES WILL PUSH EAST TO CROSS OVER THE STATE WEDNESDAY. A COUPLE DEGREES WARMER THAN LAST NIGHTS READINGS. CONTINUED CLEAR SKIES AND LIGHT WINDS TOMORROW WILL LIKELY PRODUCE THE WARMEST MAX TEMPERATURES OF THE WEEK AS THEY PUSH A FEW DEGREES WARMER OVER TODAY'S READINGS. THE UPPER RIDGE SHIFTS INTO THE CENTRAL PLAINS STATES AS AN UPPER LEVEL TROUGH MOVES INTO THE WESTERN U.
Temperatures will be above normal - thanks in part to the increasing cloud cover - with lows expected to be in the lower 60s (normal low at TLH 46).
LOOK FOR LIGHT RAIN TO CONTINUE OFF AND ON FOR THE NEXT 24 HOURS AS SURFACE INVERTED TROUGH STRETCHES FROM WESTERN GULF REGION UP INTO NORTHERN PART OF TENNESSEE VALLEY.
440 PM EDT TUE MAR 10 2015 LOW PRESSURE OVER NORTHERN KENTUCKY WILL MOVE OFF TO THE NORTHEAST THIS EVENING.
545 PM EDT TUE MAR 10 2015 A LOW PRESSURE SYSTEM WILL MOVE FROM THE OHIO VALLEY.
620 PM EDT TUE MAR 10 2015 WEAK LOW PRESSURE MOVING SOUTH OF KEYSTONE STATE TONIGHT WILL BRING SOME RAIN TO THE AREA INTO EARLY WEDNESDAY MORNING.
125 PM EDT TUE MAR 10 2015 LOW PRESSURE WILL QUICKLY TRACK NORTHEAST THROUGH THE SOUTHERN OHIO VALLEY TODAY. HIGH PRESSURE WILL THEN BUILD IN THE UPPER MIDWEST AND DRY OUT THE REGION ON WEDNESDAY.
310 PM EDT TUE MAR 10 2015 SKIES ARE MOSTLY SUNNY WITH TEMPERATURES IN THE LOWER 80S ALONG THE ISLAND CHAIN. A VERY FORMIDABLE WESTERN ATLANTIC RIDGE EXTENDS ACROSS THE SOUTHEAST UNITED STATES AND FLORIDA PENINSULA.
LEE SIDE LOW PRESSURE ACROSS SASKATCHEWAN AND MONTANA WILL BRING A MODERATE CHINOOK FLOW INTO THE NORTHERN PLAINS ON WEDNESDAY. WITH HIGHS EVEN INTO THE LOWER 50S ACROSS THE SNOW COVERED ARES NORTH.
Temperatures today will be cooler than they were yesterday along the coast and in the valleys.
Could see some SHRA develop after sunrise, and the area will see SHRA/TSRA development (MVFR/IFR ceilings and/or visibilities) late tomorrow morning through tomorrow afternoon as a cold front moves on through.
This upper low remains progged to open up this evening with the upper trough moving eastward across New Mexico during the overnight hours. Meanwhile, a strong cold front located across eastern Colorado and western Kansas will surge quickly southward and is expected to be through the forecast area by 12Z Thursday. The passage of the cold front will shunt heavy rain potential southward overnight tonight. Very cold air will arrive with the cold front, and with persistent, although weaker lift the potential for light rainfall will continue through much/all of the day Thursday. Critical freezing temperatures are likely to move into the northwestern zones from Parmer to Swisher counties on Thursday morning with potential for some minor accumulations of ice.
1249 PM EST Wed Nov 6 2019 High pressure across the mid-Atlantic Coast will bring drier air into the area through tonight.
An upper ridge will keep weather systems away from Western Washington until late in the week.
A cold front will move southward across the area today shifting the winds to the northeast and cooling off the ridges a bit. Otherwise a ridge of high pressure will be firmly established over the area for at least the next few days with dry weather and mild temperatures.
Precip will increase in coverage & intensity over the next few hours with moist low-level upslope becoming established in the wake of a back door cold front. GFS/NAM forecast soundings are continuing to show the bulk of saturation in the 0 to -10 deg C layer, suggesting no/ little ice crystal growth and a threat for freezing drizzle. The threat for freezing drizzle should diminish overnight, but areas of fog should persist well into the night.
Cyclogenesis will take place off the Mid-Atlantic coast, replacing the high pressure currently residing across the Northeast CONUS.