Aikyam-Lab/Synoptic-Bench huggingface dataset:
1152 PM CST SUN FEB 1 2015 FOR 06Z TAFS /ISSUED 957 PM CST SUN FEB 1 2015/ ARCTIC COLD FRONT CONTINUES TO ADVANCE STEADILY EASTWARD ACROSS THE FORECAST AREA THIS EVENING. A FEW SLICK SPOTS MAY DEVELOP ON AREA ROADS IN THE MORNING AS AIR TEMPERATURES FALL TO NEAR FREEZING AND PATCHES OF BLACK ICE DEVELOP. DEWPOINT/RH GRIDS TO REFLECT CURRENT POSITION AND EXPECTED MOVEMENT OF THE COLD FRONT. WITH ARCTIC COLD FRONT CURRENTLY PUSHING ACROSS NRN ALABAMA. SNOW FLURRIES WILL ALSO BE PSBL AS UPPER TROUGH CROSSES REGION DURING THE 09-15Z PERIOD.
FARTHER EAST ACROSS THE EASTERN PLAINS OF NM LOW CIGS IN THE LOW VFR TO HIGH END IFR RANGE WILL BE SLOWER TO ERODE AWAY.
312 AM CST Mon Feb 2 2015 Water vapor/IR satellite showing departing upper trough across the OH River valley. Subsidence and drying in its wake is helping to clear skies the last of the low clouds across the extreme southeast corner of the county warning area. the lower temps will be an offsetting factor. so have lowered slightly to the middle 20s across the deeper snow in the north to the low to mid 30s across the far south/southwest periphery of the county warning area. the south/southwest winds will decrease enough with mostly clear skies to allow lows to fall into the mid teens north to the lower 20s south.
333 AM EST MON FEB 2 2015 A COLD FRONT WILL MOVE ACROSS THE REGION TODAY. WITH A MIXTURE OF FREEZING RAIN AND RAIN ACROSS THE SOUTHERN HALF OF THE AREA.
401 AM EST MON FEB 2 2015 A COLD FRONT WILL MOVE ACROSS THE REGION TODAY. WITH A MIXTURE OF FREEZING RAIN AND RAIN ACROSS THE SOUTHERN HALF OF THE AREA.
340 AM CST MON FEB 2 2015 CURRENT OBSERVATIONS ACROSS MIDDLE TN SHOW THAT THE COLD FRONT ASSOCIATED WITH OUR CURRENT SYSTEM IS ALL THE WAY THROUGH THE AREA. RANGING FROM THE LOW 40S ON THE PLATEAU TO LOW 30S NEAR THE TN RIVER. NO PRECIP IS EXPECTED WITH THIS TROUGH.
Strong cold front continues to push southward across the forecast area today. Snow is lightening up as of middle afternoon, and as the upper trof axis is now overhead and pushing eastward, expect snow to continue to lighten and come to an end over the next several hours. Will monitor conditions, as if temperatures are even a few degrees cooler than forecast, may need a Wind Chill advisory for the northern counties around sunrise. Forecast highs on Monday are 20s far northeast to around freezing in the west, although should at least see some sunshine for a while during the morning and early afternoon.
TEMPS OVER W TN BEHIND THE COLD FRONT HAVE ONLY DROPPED TO 34 DEGREES. TOTAL SNOW AMOUNTS WILL BE ON THE LOWER THRESHOLD OR BELOW FOR A WINTER WEATHER ADVISORY.
Look for afternoon temperatures to only warm into the lower 30s. As high pressure sinks into the Arklatex, southerly winds will return to the Ozarks this evening.
1151 PM EST SUN FEB 1 2015 LOW PRESSURE WILL APPROACH FROM THE SOUTHWEST OVERNIGHT AND CROSS THE GULF OF MAINE MONDAY. THE LOW IS THEN EXPECTED TO OVER THROUGH THE MARITIMES LATE MONDAY NIGHT.
THE MAIN WEATHER IMPACT THROUGH THE SHORT TERM IS THE COLD FRONT THAT IS CURRENTLY SITUATED FROM NORTHWEST MISSISSIPPI INTO EAST CENTRAL TEXAS. COOL HIGH PRESSURE WILL BUILD OVER THE AREA ON MONDAY WITH HIGHS ONLY CLIMBING INTO 40S FOR MOST OF THE AREA. A COLD NIGHT IS ON TAP MONDAY NIGHT AS HIGH PRESSURE REMAINS OVER THE AREA AND RADIATIONAL COOLING PREVAILS WITH LOWS FALLING INTO THE MID 20S.
HIGH PRESSURE BUILDS INTO THE REGION OVERNIGHT. WITH THE NEW SNOW COVER WENT ON THE LOW SIDE OF GUIDANCE WITH RESPECT TO LOW TEMPERATURES. THE HIGH PRESSURE SLIDES TO THE SOUTHEAST ON MONDAY. AND WENT ON THE LOW SIDE OF GUIDANCE FOR HIGH TEMPERATURES. HAVE FORECASTED HIGHS IN THE LOWER TO MID TEENS THROUGH THE EAST TO NEAR 30 THROUGH SOUTH CENTRAL SD. A WEAK RIDGE OF HIGH PRESSURE NOSES IN WHICH WILL ALSO AID SOME OF THE RADIATIONAL COOLING.
830 PM PST SUN FEB 1 2015 HIGH PRESSURE ALOFT WILL KEEP A WARM AND DRY AIR MASS IN PLACE THROUGH MIDWEEK.
SHORT TERM: (Through Late This Afternoon) Cold Canadian high centered from eastern KS to northern TX at 08z will dominate our weather today as it presses southeast into the lower Ohio Valley by evening. The strong northwest winds that have been buffeting the area since Sunday evening have begun to diminish, and should continue to drop fairly rapidly during the morning as the high builds in and pressure gradient begins to relax. No major changes to today's temps in going forecast, and will maintain highs in the upper teens over the deep snow cover in the extreme NW tip of our CWA to the lower 30s in our extreme southeast.
Winds will quickly die down later this evening with high pressure building in from the northwest.
LOOK FOR DRIER AND MUCH WARMER WEATHER OVER THE NEXT SEVERAL DAYS AS A HIGH PRESSURE RIDGE MOVES INTO THE WESTERN STATES.
AS AN UPPER LEVEL WAVE EXITS THE AREA EARLY THIS MORNING SOME LIGHT DRIZZLE AND FREEZING DRIZZLE MAY CONTINUE ACROSS PORTIONS OF CENTRAL INDIANA.
437 PM EST MON FEB 9 2015 HIGH PRESSURE WILL BE MOVING INTO THE AREA TODAY AND TONIGHT. HIGH TEMPERATURES TODAY WILL RANGE FROM THE LOWER 20S IN SOUTHERN MICHIGAN TO THE LOWER 30S ALONG THE OHIO RIVER. LOWS TONIGHT WILL RANGE FROM SINGLE DIGITS ABOVE ZERO IN SOUTHERN MICHIGAN TO THE LOWER 20S ALONG THE OHIO RIVER. HIGH PRESSURE WILL KEEP THE SHORT TERM PERIOD QUIET WITH BELOW NORMAL TEMPERATURES. THE STRONG INVERSION WILL STRENGTHEN AND LOWER AS SUBSIDENCE INCREASES WITH THE APPROACHING HIGH PRESSURE SYSTEM. DRY AIR ADVECTION FROM THE NORTH WILL SCOUR OUR THE LOW LEVEL MOISTURE BY LATE THIS EVENING WHICH WILL ALLOW SKIES TO CLEAR FROM NORTH TO SOUTH OVERNIGHT.
350 PM EST MON FEB 9 2015 COLD FRONT WILL EXIT OVERNIGHT. HIGH PRESSURE BUILDS ON TUESDAY.
1147 AM EST MON FEB 9 2015 UPDATE HIGH PRESSURE WILL BUILD IN AND PRODUCE FAIR AND SEASONABLY COLD WEATHER TODAY THROUGH TUESDAY.
/ISSUED 356 AM CST MON FEB 9 2015/ ABOVE NORMAL WARMTH WILL BE ON TAP ONCE AGAIN TO BEGIN THE WEEK AS UPPER RIDGING HOLDS STRONG ACROSS THE SOUTHERN PLAINS DESPITE THE PRESENCE OF PACIFIC COAST ENERGY WEAKENING ITS WESTERN EXTENT INTO THE CENTRAL ROCKIES. RESULTANT LEE TROUGHING IN THE FRONT RANGE LEADING TO DOWNSLOPE BREEZES UNDERNEATH FULL INSOLATION WILL SPELL TEMPERATURES ONCE AGAIN IN THE MID-UPPER 70S.
WE ARE STILL SEEING SOME WEAK PVA ON THE BACK SIDE OF THE TROUGH.
A WEAKENING COLD FRONT HAS BEEN SQUEEZING OUT A FEW ISOLATED SHOWERS AROUND ACADIANA. USED A BLEND OF THE MODELS WITH A LEAN TOWARDS THE EURO, WARMER THAN GFS GUIDANCE. A LIGHT NORTHERLY FLOW CONTINUES AS THE UPPER RIDGE REMAINS TO OUR WEST. THE DRY TREND CONTINUES AS A DIGGING UPPER TROF ALONG THE EAST COAST MAINTAINS A NORTHWESTERLY UPPER FLOW WITH SURFACE RIDGING FOR OUR AREA.
AN APPROACHING COLD FRONT WILL BRING VARIABLE WINDS TO NW OK TOWARD 18Z TOMORROW. THOUGH TEMPERATURES WILL BE COOLER THAN YESTERDAY AS SLIGHTLY COOLER AIR HAS MOVED INTO THE AREA FROM THE NORTH. PREFERRED THE WARMER SIDE OF GUIDANCE HIGHS IN MOST LOCATIONS. WENT WITH THE WARMER SIDE OF GUIDANCE. A FEW DEGREES WARMER THAN TODAY IN MOST LOCATIONS.
/ISSUED 331 AM CST Mon Feb 9 2015/ (Today and tonight) Full sun and light winds are in store today with surface ridging in place. The center of ridging will be sliding slowly east late afternoon and overnight, with a return of southeast to south winds of 5 to 10 mph.
The low clouds may reform later tonight across the east. The initial push of cooler air will lower highs into the upper 30s and lower 40s for Wednesdays and should move through the area dry as well.
1033 mb Canadian high pressure over Manitoba and northern Sasketchewan and ridging southward into the Midwest and will build into the Great Lakes region this evening. Issued nowcast for patchy freezing drizzle and possible flurries this morning over eastern IL. With the cold front well to the east, high pressure ridge to the west, and northwest flow over the region; am expecting cloudy skies to continue today, with northerly winds of around 15 mph.
FREEZING RAIN/SLEET POTENTIAL. MOST GUIDANCE INDICATE A STRONGER SIGNAL FOR FREEZING RAIN ACROSS A PORTION OF SOUTHEAST NORTH DAKOTA. WILL THE ABOVE FREEZING WARM LAYER ALOFT ADVECT FURTHER NORTH/EAST THAN EXPECTED? THE ANSWER IS MOST LIKELY YES. BUT HOW FAR? DID ADJUST FREEZING RAIN/SLEET CHANCES TO ACCOUNT FOR THIS POSSIBILITY (JUST SOUTH OF DEVILS LAKE AND INTO THE SOUTHERN RED RIVER VALLEY). WHICH WILL INCREASE IMPACTS (NOT TO MENTION THE FREEZING RAIN ACROSS A PORTION OF THE REGION). MOST LIKELY LOCATION FOR FREEZING DRIZZLE WILL BE THE SOUTHERN VALLEY WHERE THE AVERAGE TEMPERATURE OF THE LOW LEVEL SATURATED LAYER WILL BE WARMER.
255 PM CST MON FEB 9 2015 AT H5 TROUGH FROM GREAT LAKES INTO FLORIDA PANHANDLE WITH ASSOCIATED PRECIPITATION ALL ALONG THE EASTERN SEABOARD. RIDGE INTO THE NORTHERN PLAINS WITH FAIRLY STRONG WAVE MOVING ACROSS THE PACIFIC NORTHWEST. BRINGING DENSE FOG AS FAR WEST AS THE HIGHWAY 83 CORRIDOR. DRAGGING A TROUGH THROUGH THE SANDHILLS. TRAJECTORY OF THE LOWER TROPOSPHERIC WIND. AND WITH SATURATION CONFINED TO THE LOWER TROPOSPHERE. THE DISTURBANCE WILL DRAW SLIGHTLY COOLER AIR ACROSS WEST CENTRAL NEBRASKA. TUESDAY NIGHT COOLER AIR FILTERS IN ACROSS THE NORTHERN PLAINS INTO WESTERN NEBRASKA. WITH THE UPPER RIDGE IN PLACE THE HIGH PRESSURE WILL BE MOVED FURTHER EAST WITH A STATIONARY BOUNDARY FROM THE NORTHERN NEBRASKA PANHANDLE INTO BROKEN BOW. WARMER 40S TO THE SOUTHWEST AND 30S TO THE NORTHEAST.
A HIGH PRESSURE IS CENTERED OVER WISCONSIN. LEE TROUGH HAS DEVELOPED OVER EAST COLORADO. A LARGE PACIFIC TROUGH MADE LANDFALL IN THE NORTHWESTERN UNITED STATES. TEMPERATURES FORECAST TO BE A FEW DEGREES COOLER THAN TODAY AS WARMEST AIR ALOFT SHIFTS SOUTH.
RIDGE TO SHIFT EASTWARD ON TUESDAY ALLOWING WARMER TEMPS AND RETURN TO SOUTHERLY WINDS.
IN THE WAKE OF YESTERDAYS COLD FRONT. THIS WILL BRING A SOUTHERLY WIND BACK TO THE HEARTLAND WITH A WARMUP TO NEAR NORMAL TEMPS THROUGH MID WEEK AS HIGH PRESSURE DRIFTS TO THE SOUTHEAST.
ARE EXPECTED TO DEVELOP ACROSS THE AREA THIS AFTERNOON AS A SHORT WAVE TROUGH MOVES NE FROM NRN CA. THE FRONT WAS WELL EAST OF AN UPPER LOW CENTERED OFF THE WA/OR COAST. MORE SHOWERS WILL ARRIVE THIS AFTERNOON AS THE UPPER LOW MOVES INLAND. BULK OF THE CONVECTION WILL BE OVER THE HIGHER TERRAIN DUE TO UPSLOPE FORCING FROM STRONG MID-LEVEL WINDS. TEMPERATURES WILL BE COOLER ON TUESDAY. HIGH AMPLITUDE UPPER LEVEL RIDGE WILL REMAIN OVER THE INTERMOUNTAIN REGION INTO THE WEEKEND FOR DRY WEATHER.
These clouds should eventually scatter out later today as low-level ridging builds in, but depth of the moisture and weak cold air advection may make it difficult for much clearing to take place until mid/late afternoon. Tuesday looks to be the warmest of the upcoming week with temperatures warming back into the lower 50s for areas near and south of KC and mid/upper 40s elsewhere. Another cold front drops through the region Tuesday night bringing a seasonably chilly shot of cold air.
333 PM CST MON FEB 9 2015 AT 3 PM SURFACE ANALYSIS DEPICTED A LOW PRESSURE CENTER OVER CENTRAL NORTH CAROLINA WITH A COLD FRONT TRAILING FROM THE LOW CENTER SOUTHWESTWARD ALONG THE GULF COAST. CLOUDS CONTINUE TO FILTER INTO THE REGION WITH NORTHERLY WINDS IN THE WAKE OF THE AFOREMENTIONED COLD FRONT EARLIER TODAY. COOL AND DRY CONDITIONS ARE THE HIGHLIGHT OF THE FORECAST PACKAGE THIS AFTERNOON WITH BELOW NORMAL TEMPERATURES RETURNING THIS WEEKEND. THE UPPER LEVEL TROUGH LOCATED OFF TO OUR EAST WILL CONTINUE ITS EASTWARD TRANSIT OVERNIGHT. AND THUS CLOUD COVER WILL DIMINISH ON TUESDAY AFTERNOON AS HIGH PRESSURE BUILDS IN AT THE SURFACE WITH RIDGING ALOFT. WINDS WILL PERSIST FROM THE NORTH ON TUESDAY KEEPING HIGHS COOLER THAN MONDAY.
232 PM EST MON FEB 9 2015 A LOW PRESSURE SYSTEM WILL MOVE EAST ALONG A FRONT DRAPED OVER THE AREA BRINGING A MIX OF PRECIPITATION TO THE AREA TONIGHT. H5 TROF DROPPING INTO CNTRL GREAT LKS AS OF THIS TIME.
219 PM CST MON FEB 9 2015 ONE MORE WARM DAY IS IN STORE TOMORROW BEFORE CHANGES COME WITH THE NEXT COLD FRONT. BEFORE THEN AN UPPER LEVEL RIDGE WHOSE AXIS IS JUST WEST OF THE FCST AREA THIS AFTERNOON WILL EWD TONIGHT AND TUESDAY. FLATTENING AS IT DOES WITH A SHORT WAVE TROUGH MOVING ACROSS THE NORTHERN AND CENTRAL ROCKIES. MEANWHILE THE INITIAL WIND SHIFT WITH THE COLD FRONT WILL SAG THROUGH THE PANHANDLE DURING THE DAY. AS A RESULT WILL SIDE TOWARD THE WARMER MAVMOS NUMBERS IN LINE WITH A 3-6 DEGREE INCREASE FOR ALL OF THE FCST AREA BAR THE NWRN ZONES WHERE THE EFFECT FROM THESE TWO FACTORS WILL BE MUCH SMALL GIVEN THEIR PROXIMITY TO THE RIDGE AND GUSTY SW WINDS THIS AFTN. WE WILL SEE SOME OCCASIONAL SHOTS OF COOLER AIR.
1033 mb Canadian high pressure over Manitoba and ridging south into the Midwest will drift east across Ontario tonight and Tue morning with ridge axis into IL by 18Z/noon Tue. Brisk north winds 8-18 mph and gusts 18-25 mph at mid afternoon to veer ne toward overnight and diminish under 10 mph as high pressure ridge moves in.
A HIGH PRESSURE IS CENTERED OVER WISCONSIN. LEE TROUGH HAS DEVELOPED OVER EAST COLORADO. A LARGE PACIFIC TROUGH MADE LANDFALL IN THE NORTHWESTERN UNITED STATES. TEMPERATURES FORECAST TO BE A FEW DEGREES COOLER THAN TODAY AS WARMEST AIR ALOFT SHIFTS SOUTH. DRY NORTHWEST FLOW WILL PREVAIL OVER THE TRI-STATE AREA AS THE LOW OVER SOUTHEAST CANADA AND THE RIDGE OVER THE GREAT BASIN REMAIN STATIONARY. DURING THIS PERIOD A FRONTAL BOUNDARY WILL WAVER ACROSS THE AREA AS MINOR UPPER LEVEL SHORT WAVE TROUGHS IN THE NORTHWEST FLOW MOVE THROUGH.
943 AM MST MON FEB 9 2015 NEAR RECORD WARMTH WILL CONTINUE TODAY WITH HIGH PRESSURE ALOFT OVER THE REGION.
203 PM CST Mon Feb 9 2015 Above normal temperatures will prevail across southeast New Mexico and west Texas the next couple of days as an upper ridge translates eastward over the region.
305 PM EST MON FEB 9 2015 LOW PRESSURE WILL SLIDE EASTWARD THROUGH THE AREA TODAY.
UPPER RIDGE ALOFT WITH NORTHWESTERLY FLOW TRANSITIONING TO MORE OF A ZONAL FLOW BY THIS EVENING. WILL GET "CHANCE"S GOING FOR SNOW IN THE HIGH MOUNTAINS AFTER 06Z TONIGHT.
957 AM MST MON FEB 9 2015 THE WESTERN RIDGE IS UNDER ATTACK FOR THE NEXT FEW DAYS BEFORE IT REBOUNDS LATE IN THE WEEK. THE RIDGE AXIS SHIFTS EAST THIS MORNING AS A WEAKENING TROUGH WORKS THROUGH THE GREAT BASIN. THE INITIAL PUSH OF THIS TROUGH SLOWS AS IT WORKS INTO THE MEAN RIDGE. TUESDAY THE RIDGE REBOUNDS IN THE EASTERN PACIFIC AS A STRONGER WAVE DIGS DOWN ITS EAST SIDE FROM THE NW. THE 80KT JET AND COLD FRONT SAGS INTO THE SAN JUAN MTNS THROUGH THE DAY. THE TROUGH TURNS TO THE SOUTHWEST WED AFTERNOON AND SOME MOISTURE APPEARS TO BE DRAWN WEST OVER THE SAN JUAN MOUNTAINS.
AREA OF LOW PRESSURE OVER EASTERN GULF WATERS APPEARS TO BE MOVING MORE EAST BASED ON SATELLITE TRENDS AND IF THIS CONTINUES WOULD SLIDE ACROSS THE SOUTHERN FLORIDA PENINSULA TONIGHT AHEAD OF THE ADVANCING COLD FRONT. THE MAJORITY OF THE PRECIPITATION WILL MOVE EAST DURING THIS EVENING WITH A FEW SHOWERS STILL POSSIBLE UNTIL THE COLD FRONT MOVES THROUGH OVERNIGHT. COOLER DRIER AIR WILL MOVE IN BEHIND THE FRONT LATE TONIGHT AND TUESDAY HELPING TO GRADUALLY CLEAR SKIES.
COOL HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT INTO TUESDAY.
1253 PM EST MON FEB 9 2015 A LOW PRESSURE SYSTEM WILL MOVE EAST ALONG A FRONT DRAPED OVER THE AREA BRINGING A MIX OF PRECIPITATION TO THE AREA TONIGHT. H5 TROF DROPPING INTO CNTRL GREAT LKS AS OF THIS TIME.
HIGH PRESSURE WILL CONTINUE TO DOMINATE THE WEATHER OVER THE REGION THROUGH MOST OF THIS WEEK. HIGH TEMPERATURES IN THE LOWER TO MIDDLE 80S WILL BE COMMON. WITH JUST A SHORT PERIOD OF SLIGHTLY COOLER TEMPERATURES. A TURN TOWARDS COOLER TEMPERATURES AND MORE UNSETTLED WEATHER IS POSSIBLE BY THE WEEKEND. STRONG UPPER LEVEL HIGH PRESSURE RIDGE OVER THE DESERT SOUTHWEST STILL HAS NOT GIVEN UP THE GHOST. AND AS A RESULT SUNNY SKIES AND VERY WARM TEMPERATURES PERSIST OVER THE LOWER DESERTS EARLY THIS AFTERNOON. HIGH TEMPS TODAY WILL AGAIN CLIMB INTO THE LOW TO MID 80S. WITH A HIGH AMPLITUDE UPPER RIDGE ALONG THE PAC NW COAST AND AND UPPER TROF/CLOSED LOW FORMING ALONG THE BAJA CA COAST. THE GREATER PHOENIX AREA WILL SEE LITTLE OF ANY FALLOFF WITH HIGHS REMAINING IN THE LOWER OR EVEN MID 80S.
The cold front early this morning is just to the south of the Ohio River across central Kentucky. We should start to see the clouds clearing out on Tuesday as high pressure builds in. Highs Tuesday will be in the lower to mid 40s.
The shower activity should start to decrease on Tuesday afternoon as a high pressure ridge builds over the region.
UPPER RIDGING DEVELOPS AS THE WAVE CLOSES OFF IN THE WESTERN ATLANTIC LATE TOMORROW WITH WINDS SETTLING DOWN AND HIGH PRESSURE DOMINATING THE AREA.
302 PM CST MON FEB 9 2015 AS OF 21Z THE LOCAL AREA IS ON THE BACKSIDE OF A DEPARTING UPPER TROUGH WITH A GUSTY NW FLOW IN ITS WAKE. CONTINUED COLD ADVECTION WILL ALLOW TEMPS TO DROP INTO THE LOWER 30S OVERNIGHT. 850 TEMPS RECOVER SLIGHTLY TUE AS THE PREVIOUSLY MENTIONED SYSTEM PASSES OFF THE ATLANTIC COAST AND ANOTHER LOW PRESSURE SYSTEM DEVELOPS OVER THE UPPER MIDWEST.
341 PM CST MON FEB 9 2015 DRY COLD FRONT MOVED THROUGH AND INTO THE GULF AS TEMPERATURES CLIMBED TO AROUND 80 DEGREES TODAY. RIDGING ALOFT WILL ALLOW FOR PLENTY OF SUNSHINE AS TEMPERATURES RECOVER INTO THE 60S TO NEAR 70.
BULK CLOUDINESS WITHIN A DEVELOPING/PASSING UPPER TROF WILL RULE THE BROAD PART OF THE DAY TODAY, AS COOLER AIR CONTINUES TO USHER INTO/ACROSS THE HEARTLAND.
1244 PM EST MON FEB 9 2015 AVIATION HIGH PRESSURE WILL BUILD IN AND PRODUCE FAIR AND SEASONABLY COLD WEATHER TODAY THROUGH TUESDAY.
1046 AM MST MON FEB 9 2015 UPPER LEVEL RIDGE AXIS IS SHIFTING INTO THE NORTHERN PLAINS AS PACIFIC COAST TROF LIFTS INTO BRITISH COLUMBIA. TODAY THROUGH TUESDAY NIGHT UPPER RIDGE AXIS IS OVER THE ROCKIES. AND A LOW PRESSURE SYSTEM IS DIGGING INTO THE PACIFIC NORTHWEST. WITH HIGH PRESSURE OVER THE EASTERN DAKOTAS. THE AXIS OF THE UPPER RIDGE WILL TRANSITION EASTWARD OVER THE NORTHERN PLAINS TODAY. WHILE SOUTHEAST SURFACE WINDS INCREASE AHEAD OF THE APPROACHING TROUGH. FORECAST SOUNDINGS ARE STILL INDICATIVE OF SOME LIGHT FREEZING RAIN ACROSS NORTHERN SD OVERNIGHT. WILL HOLD OFF ON ANY POSSIBLE FREEZING RAIN ADVISORIES. MAIN UPPER TROUGH AXIS MOVES OVER THE NORTHERN PLAINS TUESDAY. A COLD FRONT WILL BEGIN PASSING THROUGH. ALTHOUGH ONCE AGAIN TEMP FORECAST WILL BE TRICKY WITH CLOUDS AND SPEED OF COLD FRONT.
WILL CONTINUE TO SEE ISOLATED LIGHT RAIN SHOWERS ACROSS THE SOUTHERN APPALACHIAN REGION TODAY AS A WEAK COLD FRONT MOVES THROUGH THE AREA. CHATTANOOGA AIRPORT, TN 56 34 51 33 / 40 0 0 0 KNOXVILLE MCGHEE TYSON AIRPORT, TN 59 33 45 30 / 60 10 0 0 OAK RIDGE, TN 57 33 46 31 / 50 10 0 0 TRI CITIES AIRPORT, TN 57 34 44 25 / 70 20 0 0.
317 PM EST MON FEB 9 2015 LOW PRESSURE SOUTH OF THE NEW ENGLAND COAST WILL DRIFT OFF TO THE EAST TONIGHT AND TUESDAY AS HIGH PRESSURE BUILDS IN FROM THE NORTHWEST.
HI RES MODELS SHOW THE FOG BEING PUSHED SOUTH OF THE CWA BETWEEN 6 AND 8 AM AS SLIGHTLY DRIER AIR AND WEAK NORTH WINDS DEVELOP BEHIND A WEAK TROUGH AXIS. SUNNY AND WARM TODAY UNDER THE INFLUENCE OF RIDGING ALOFT. THE RIDGE FLATTENS AND SHIFTS EAST TUESDAY INTO TUESDAY NIGHT.
MORE LOW CLOUDS ROTATING SOUTHWARD AROUND THE UPPER TROUGH WILL REMAIN ACROSS THE FORECAST AREA THROUGH THE AFTERNOON. WITH NEARLY STEADY TO SLIGHTLY FALLING TEMPS IN THE WAKE OF THE COLD FRONT THAT MOVED THROUGH EARLIER THIS MORNING. WITH LOW CEILINGS BEING OBSERVED ACROSS MUCH OF THE THE LOWER TENNESSEE VALLEY. WINDS WILL BECOME MORE NORTHERLY AS A COLD FRONT PASSES THROUGH EACH TERMINAL. DRY AIR MAY FILTER IN QUICKER THAN FORECAST WHICH WOULD HELP TO ERODE THE LOW CLOUD COVER.
1250 PM EST MON FEB 9 2015 LOW PRESSURE AND ITS ASSOCIATED COLD FRONT WILL CONTINUE TO MOVE SOUTH OF THE AREA TODAY. A WEAK TROF ALOFT WILL MOVE ACROSS THE REGION LATER TODAY.
COOLER TEMPERATURES ARE EXPECTED TONIGHT AND TUESDAY.
THE UPPER LEVEL RIDGE OVER THE ROCKIES THE LAST COUPLE OF DAYS WILL SLOWLY SHIFT EASTWARD INTO THE PLAINS DURING THE SHORT TERM PERIOD. A STRONG 100+ KNOT 250 MB JET WILL BE OBSERVED NORTH OF THIS RIDGE, WITH ITS MAXIMUM LOCATED MAINLY NORTH OF THE FORECAST AREA. WINDS WILL GENERALLY BE FROM THE NORTHWEST THIS MORNING, SHIFTING TO THE SOUTH SOUTHEAST BY NOON AS LEE TROUGHING INTENSIFIES ACROSS EASTERN COLORADO.
330 PM CST MON FEB 9 2015 COLD FRONT HAS EXITED THE CWA BUT SOME SCATTERED SHOWERS. WILL REMAIN POSSIBLE ACROSS THE FAR EAST THRU 00Z WHEN THE UPPER TROF FINALLY PUSHES EAST INTO GA. WITH SEVERAL DRY COLD FRONTS EXPECTED TO PUSH THRU THE REGION FOLLOWED BY SOME FAIRLY STRONG ARCTIC HIGHS.
122 PM EST MON FEB 9 2015 A COLD FRONT WILL PUSH THROUGH TONIGHT.
1144 AM CST Mon Feb 9 2015 Behind yesterday's cold front, cooler air was working its way across the region. Cloud cover associated with the departing upper level trough was working its way to the southwest across the region overnight as well. The dry and cool trend will continue tonight with temperatures falling into the lower 20s to lower 30s from northeast to southwest across the region.
A 500mb trough will move east of Kentucky this afternoon. Temperatures tonight will fall into the mid 20s, with highs Tuesday rising into the upper 30s to the lower 40s.
There may be at least partial clearing over ther western/southwestern portion of the forecast area this afternoon, but most of the low level cloud cover may linger underneath the subsidence inversion.
A WEAK COLD FRONT HAS MOVED ACROSS THE AREA TODAY BUT MOST OF THE COOLER AIR IS LAGGING WELL TO THE NORTH. TEMPS ARE EXPECTED TO BE SEVERAL DEGREES COOLER ON TUESDAY AS NELY LOW LVL FLOW FINALLY BRINGS SOME OF THIS COOLER AIR INTO THE REGION BUT AFTERNOON HIGHS WILL STILL BE WELL ABOVE NORMAL.
SHOULD SEE A SIGNIFICANT DECREASE IN LOWS TEMPS FOR TUE MORNING WITH THE TYPICAL COOL SPOTS APPROACHING FREEZING. THESE FREEZING TEMPS WILL BE OK BECAUSE ALL THE PRECIP WILL BE EAST OF THE AREA SO NO WINTRY PRECIP EXPECTED IN THE SHORT TERM.
1236 PM EST MON FEB 9 2015 WITH A COLD FRONT SOUTHEAST OF THE AREA. HIGH PRESSURE WILL BUILD INTO THE AREA TONIGHT INTO TUESDAY. THE HIGH WILL MOVE EAST TUESDAY NIGHT AS ANOTHER LOW PRESSURE SYSTEM AND COLD FRONT APPROACH FROM THE WEST.
STILL SEE SOME THREAT FOR FREEZING DRIZZLE ACROSS THE FAR SOUTH AND WILL CONTINUE A MENTION FOR PARTS OF NORTHEAST IA/SOUTHWEST WI. WITH RATIOS ON THE LOWER SIDE.
THIS EVENING THROUGH TUESDAY NIGHT UPPER LEVEL RIDGE AXIS HAS SHIFTING INTO THE NORTHERN PLAINS AS PACIFIC COAST TROF LIFTS INTO BRITISH COLUMBIA. HIGH PRESSURE IS CENTERED OVER THE MIDWEST WITH LOW PRESSURE TROF DEVELOPING IN THE LEE OF THE ROCKIES. THE AXIS OF THE UPPER RIDGE WILL TRANSITION EASTWARD OVER THE NORTHERN PLAINS TONIGHT. WITH TEMPS FALLING BELOW FREEZING ACROSS NORTHWEST SOUTH DAKOTA. FORECAST SOUNDINGS ARE STILL INDICATIVE OF SOME LIGHT FREEZING RAIN ACROSS FAR NORTHERN SD OVERNIGHT. BAND OF RAIN/FREEZING RAIN WILL SHIFT EAST LATE TONIGHT. MAIN UPPER TROUGH AXIS MOVES OVER THE NORTHERN PLAINS TUESDAY. DRAGGING A COLD FRONT THROUGH THE AREA. ALTHOUGH ONCE AGAIN TEMP FORECAST WILL BE TRICKY WITH CLOUDS AND SPEED OF COLD FRONT.
405 PM EST MON FEB 9 2015 COLD FRONT EXITS OVERNIGHT. HIGH PRESSURE TUESDAY NIGHT.
HIGH PRESSURE OVER NORTHERN MEXICO WILL CONTINUE TO PRODUCE NORTHWEST FLOW ALOFT OVER MUCH OF TEXAS.
WATER VAPOR AND 500 MB ANALYSIS SHOW A PERSISTENT MEAN RIDGE ACROSS THE SOUTHWEST DRIFTING EASTWARD TOWARD THE SOUTHERN PLAINS AND A MID- UPPER TROUGH APPROACHING PACIFIC NORTHWEST. AT THE SURFACE A LEE TROUGH EXTENDED FROM CENTRAL COLORADO SOUTHWARD INTO EASTERN NEW MEXICO. THE LEE TROUGH WILL STRENGTHEN AND SHIFT EAST TONIGHT AND TOMORROW RESULTING IN SUBSIDING SOUTH-SOUTHEASTERLY WINDS VEERING AROUND TO MORE NORTHERLY TOMORROW. AFOREMENTIONED WAVE APPROACHING THE PACIFIC NORTHWEST WILL MOVE SOUTHEASTWARD AND FORCE A COLD FRONT THROUGH THE AREA TUESDAY NIGHT.
MORE LOW CLOUDS ROTATING SOUTHWARD AROUND THE UPPER TROUGH WILL REMAIN ACROSS THE FORECAST AREA THROUGH THE AFTERNOON. WITH NEARLY STEADY TO SLIGHTLY FALLING TEMPS IN THE WAKE OF THE COLD FRONT THAT MOVED THROUGH EARLIER THIS MORNING.
BEFORE A STRONG COLD FRONT SENDS TEMPERATURES TUMBLING BACK DOWN TOWARD THE SEASONAL AVERAGE.
DEEPENING LOW PRESSURE ACROSS THE FAR NORTHERN HIGH PLAINS INTO WYOMING AND MONTANA WILL CAUSE THE LEADING EDGE OF A PACIFIC HIGH TO CREATE NORTH SURFACE WINDS INTO WESTERN KANSAS. THE SOURCE AIR HOWEVER IS STILL IN THE LOW TEENS CELCIUS ACROSS THE SOURCE REGION, AND AS SUCH, SIGNIFICANT COLD ADVECTION IS NOT ANTICIPATED INITIALLY.