Aikyam-Lab/Synoptic-Bench huggingface dataset:
COLD FRONT THAT PUSHED ACROSS NORTHERN ALABAMA YESTERDAY EVENING. MUCH DRIER AND COOLER AIR HAS PUSHED INTO THE AREA OVERNIGHT AND THIS MORNING. TEMPERATURES ARE IN THE MID 40S WITH DEWPOINTS IN THE LOWER TO MID 30S. LOW AND MID LEVEL MOISTURE ADVECTION IS EXPECTED THROUGH THE DAY AHEAD OF A RE-ENFORCING COLD FRONT EXTENDING FROM NEAR NASHVILLE SOUTHWEST INTO CENTRAL ARKANSAS. AS THIS COLD FRONT PUSHES SOUTHEAST THROUGH THE DAY. DESPITE THE APPROACHING COLD FRONT.
BACKDOOR COLD FRONT CONTINUES TO PUSH SOUTHWEST ACROSS THE FORECAST AREA. WITH THE NE-E WINDS ASSOCIATED WITH THIS COLD AREA OF HIGH PRESSURE MOVING ACROSS THE MISSOURI VALLEY. THINK THE COOLER TEMPS WILL BE SHORT LIVED. AS THE COOL AREA OF HIGH PRESSURE AREA QUICKLY SLIDES EAST OF THE AREA TONIGHT. AS THIS RIDGE MOVES EAST. GFS IS DRIER IN THE LOW LAYERS WHICH WOULD SUGGEST ONLY A SPRINKLE CHANCE OR POSSIBLY JUST VIRGA. AS ANOTHER COLD FRONT BEGINS TO DROP SOUTH ACROSS THE NORTHERN PLAINS. CLIMBING INTO THE LOW 70S.
1245 PM EDT FRI MAR 27 2015 ARCTIC HIGH PRESSURE WILL DROP SLOWLY SOUTHEAST FROM THE PLAINS TODAY REACHING THE OHIO VALLEY ON SATURDAY.
914 PM CST SAT JAN 24 2015 A COLD FRONT WILL SWEEP ACROSS THE AREA LATE TONIGHT AND EARLY SUNDAY AS AN UPPER LEVEL DISTURBANCE PASSES BY TO OUR NORTHEAST.
/ISSUED 249 PM EST SAT JAN 24 2015/ COLD FRONT HAS NEARLY CLEARED THE AREA EARLY THIS AFTERNOON WITH ONLY VERY LIGHT SHOWERS ALONG THE LEADING EDGE ACROSS THE ATLANTIC WATERS. A COOLER AND DRIER AIR MASS WILL THEN DOMINATE SOUTH FLORIDA THROUGH THE REMAINDER OF THE WEEKEND AS HIGH PRESSURE BUILDS ACROSS THE GULF OF MEXICO.
HIGH PRESSURE WILL CONTINUE TO BRING THE DRY AND MILD WEATHER DURING THE DAY.
/ISSUED 352 PM CST SAT JAN 24 2015/ HIGH PRESSURE HAS BUILT INTO THE REGION AND THIS WAS THE REASON FOR THE BEAUTIFUL CONDITIONS FOR TODAY. HIGH PRESSURE SHOULD BE FIRMLY IN PLACE AS TEMPERATURES SHOULD RISE INTO THE 60S FOR UPCOMING WEEK.
More fog and low clouds are expected once this system moves out of the area overnight and high pressure returns.
HIGH CLOUDS COURTESY OF UPPER LOW NEAR THE BAJA OF CALIFORNIA WILL CONTINUE TO STREAM INTO SOUTH TEXAS THIS EVENING.
A COLD FRONT WAS MOVING IN FROM THE NORTH RESULTING IN COLDER NORTHERLY WINDS AND SOME CLEARING SKIES.
MOSTLY LIGHT WEST WINDS TONIGHT TO BECOME NW/NORTH AND INCREASE SOME BY NOON SUNDAY WITH THE PASSAGE OF A COLD FRONT. THE AFOREMENTIONED DISTURBANCE MAKING HEADWAY INTO THE MIDWEST WILL VEER WINDS MORE NORTH/NORTHWESTERLY DURING THE MORNING INTO THE AFTERNOON AS SOMEWHAT COOLER AIR ALOFT ATTEMPTS TO BACKDOOR INTO THE FAR SOUTHEAST PANHANDLE AND ROLLING PLAINS.
Upon the cold frontal passage, colder air will advect into the area. Where snow can occur, considering light/meager snow rates, relatively warm ground temperatures, and 2m air temperatures above freezing, little to no accumulation is expected, with any dusting reserved for grassy, insulated-type surfaces.
A QUICK REINFORCING SHOT TRANSITIONS THRU EARLY MON MORN ON THE WINGS OF A PLUNGING UPPER TROUGH. ASSOCIATED SURFACE BOUNDARY TO PUSH SOUTH WHILE BASE OF TROUGH SWINGS BY EASTWARD DURING THE DAY. OTHERWISE WEAK HIGH PRESSURE WILL RESIDE NEAR THE AREA. HIGH PRESSURE RIDGE AXIS SETTLING IN OVER THE COASTAL WATERS TONIGHT AND SUNDAY. MIN RELATIVE VALUES IN THE LOW AND MID 30S EXCEPT UPPER 30S RIGHT AT THE COAST FROM SOUTH BREVARD TO MARTIN COUNTY.
OTHERWISE CDFNT/TROF OVER CENTRAL PLAINS WILL CONTINUE TO HEAD TOWARDS THE TN VALLEY TONIGHT. WINDS WILL START TO DIMINISH OVERNIGHT SO TEMPS WILL BE ABLE TO COOL INTO THE LOWER TO MIDDLE 30S. FREEZING FOG IS POSSIBLE. THE NEXT SYSTEM STARTS TO TAKE SHAPE OVERNIGHT AS AN UPPER TROUGH DEEPENS AND WILL DIG INTO THE MID MISSISSIPPI VALLEY AND EVENTUALLY DIG SOUTH INTO THE SOUTHEASTERN STATES.
WESTERLY WINDS/DOWNSLOPE FLOW AND SOME MIXING HAVE ALLOWED TEMPERATURES TO GET INTO THE LOW TO MID 60S OVER SOUTHERN KANSAS. BILLINGS WRIGHT A VIGOROUS TROUGH WAS DIGGING OVER THE NORTHERN PLAINS STATES THIS EVENING. A TRANSIENT AREA OF LIGHT RAIN SHOWERS AND SPRINKLES HAS DEVELOPED WITHIN AN AREA OF LARGE-SCALE FORCING FOR ASCENT IMMEDIATELY DOWNSTREAM FROM THIS TROUGH ACROSS THE HIGH PLAINS. A BIGGER CONCERN WILL BE STRONG NORTHWEST WINDS DEVELOPING IN THE WAKE OF THE TROUGH ACROSS THE AREA EARLY ON SUNDAY. LARGE-SCALE FORCING FOR SUBSIDENCE WILL DEVELOP IN THE WAKE OF THE TROUGH AND WITH MODERATE LOW LEVEL CAA/STEEP LOW LEVEL LAPSE RATES AND STRONG PRESSURE RISES.
THUS TEMPS SHOULD ONLY BOTTOM OUT IN THE LOW TO MID 30S.
THE ONLY MINOR CHALLENGE WILL BE TIMING IN A COLD FRONT CURRENTLY MOVING THROUGH NE COLORADO AND NEBRASKA. A CUT OFF UPPER LOW OFF THE BAJA PENINSULA WILL CONTINUE TO SURGE BKN-OVC CIRRUS ACROSS OVERNIGHT ACROSS ALL AIRPORTS.
723 PM EST SAT JAN 24 2015 ANOTHER WEAK UPPER TROF WILL BRING COLDER AIR TO CENTRAL PA TONIGHT.
Temperatures further upstream across Nebraska and the Dakotas are warmer than many models had indicated. Upon the cold frontal passage, colder air will advect into the area. Where snow can occur, considering light/meager snow rates, relatively warm ground temperatures, and 2m air temperatures above freezing, little to no accumulation is expected, with any dusting reserved for grassy, insulated-type surfaces.
540 PM EST SAT JAN 24 2015 ANOTHER WEAK UPPER TROF WILL BRING COLDER AIR TO CENTRAL PA TONIGHT.
NON CONVECTIVE LOW LEVEL WIND SHEAR IS POSSIBLE WITH THE PASSAGE OF THIS TROUGH 03-14Z. AS STRONG A STRONG SURFACE CYCLONE DEVELOPS OVER THE MID- MISSISSIPPI VALLEY TOMORROW.
RELATIVELY WARMER BOUNDARY LAYER AIR IS GENERATING A NARROW PATCH OF FREEZING RAIN PRIMARILY OVER JAMESTOWN. THE PRECIP TYPE SHOULD CONTINUE TO TRANSITION FROM RAIN/FREEZING RAIN TO ALL SNOW OVER THE JAMES RIVER VALLEY BY THIS EVENING. LOW PRESSURE MOVING ACROSS SASKATCHEWAN WILL GENERATE DRY AND WARM SOUTHWESTERLY FLOW OVER WESTERN AND CENTRAL NORTH DAKOTA SUNDAY.
INVERSION WILL CONTINUE TO STRENGTHEN THROUGH SUNDAY AS A VERY STRONG AREA OF HIGH PRESSURE ALOFT MOVES INTO THE REGION. TEMPERATURES WILL BE MILD IN THE HIGHER ELEVATIONS AND COOLER IN THE VALLEYS DUE TO THE INVERSION. THE INVERSION WILL STRENGTHEN BELOW 5KFT MSL THROUGH SUNDAY DUE TO WARMING ALOFT ASSOCIATED WITH AN AREA OF STRONG HIGH PRESSURE.
THINK WARMER THAN GUIDANCE TEMPERATURES ARE REASONABLE AS RELATIVELY WARM AIR IS MIXED DOWN VIA THE DOWNSLOPE COMPONENT TO THE WINDS AS WELL AS THE PREVIOUSLY MENTIONED ADIABATIC MIXING. THEREFORE, INCREASE MAXIMUM TEMPERATURES TO THE LOW 60S ACROSS THE SOUTHWEST ZONES TO THE MID 50S ACROSS THE NORTHEASTERN ZONES.
A WEAK COLD FRONT OVERNIGHT WILL BRING A WIND SHIFT TO THE AREA. DRAGGING A COLD FRONT TOWARD OKLAHOMA AND ARKANSAS. SLIGHTLY COOLER TEMPERATURES.
THOUGH WITH THE HIGH CIRRUS SPREADING EASTWARD INTO MUCH OF THE CWA. THE MAIN ISSUE FOR SUN WILL BE THE INCREASING WINDS AND ESPECIALLY THE HIGHER GUSTS FOR THE AFTERNOON. GUIDANCE FORECASTS TEND TO UNDERDO MIXING AHEAD OF COLD FRONTS IN SOUTHWEST FLOW AND HAVE INCREASED HIGHS AND SFC WINDS WITH THIS IN MIND. NORTHWEST FLOW WILL SEND AN UPPER LEVEL TROUGH AND ASSOCIATED COLD FRONT ACROSS THE ARKLAMISS SUNDAY AFTERNOON AND EVENING. CONVECTIVE TEMPERATURES IN THE UPPER 40S TO MID 50S ALONG THE HIGHWAY 82 CORRIDOR COMBINED WITH SIGNIFICANT HEIGHT FALLS/LIFT WILL PROMOTE SOME LIGHT SHOWER DEVELOPMENT.
/ISSUED 144 PM EST SAT JAN 24 2015/ DRY AND CLEAR CONDITIONS ARE PREVAILING ACROSS THE STATE TODAY AS UPPER LEVEL LOW CONTINUES TO LIFT UP THE EAST COAST. WITH INCREASING HIGH LEVEL CLOUDS BY SUNDAY AFTERNOON WITH AS A STRONG AND COLD LOW PRESSURE SYSTEM APPROACHES THE STATE FROM THE NORTHWEST.
A WEAK COLD FRONT WILL PASS THIS EVENING BRINGING A SHIFT IN THE WINDS TO NORTHWESTERLY. TEMPERATURES HAVE MANAGED TO CLIMB ABOVE FREEZING AREA WIDE. THIS SYSTEM WILL FORCE A WEAK COLD FRONT THROUGH THE PANHANDLES OVERNIGHT. WITH SLIGHTLY-ENHANCED NORTHWEST POST-FRONTAL WINDS EXPECTED TO KEEP THE LOWER ATMOSPHERE MIXED ENOUGH TO BOTH PRECLUDE ANY PATCHY FOG THAT OTHERWISE MIGHT RESULT FROM TODAY/S SNOWMELT.
EXPECT MIN TEMPERATURES TO COOL TO THE LOWER 30S. TRANSITION FROM A WARMER/ABOVE NORMAL TEMPERATURE PATTERN TO ONE THAT IS BACK TO NEAR NORMAL CONDITIONS WILL OCCUR IN THE UPCOMING WEEK. THE LATTER HALF OF THIS WEEKEND WILL HAVE H5 RIDGE OVER THE WESTERN HALF OF THE COUNTRY. WITH A BROAD TROUGH SITTING OVER THE EASTERN HALF.
Light westerly winds continue through midnight then veer to the north as a cold front enters the region early Sunday. Northwesterly upper flow will bring a cold front into the area tomorrow, but there will be little if any cold air behind it so expect temperatures to be much like today.
A COLD FRONT THAT HAS ALMOST MOVED COMPLETELY THROUGH THE CWA BROUGHT A MIX OF RAIN AND DRIZZLE/FREEZING DRIZZLE ALONG WITH FALLING TEMPERATURES TODAY. MAINLY OVER THE HIGHER TERRAIN OF NCENTRAL UPPER MI AND AT THE TIP OF THE KEWEENAW. SUNDAY WILL NOT SEE MUCH WARMING AS HIGH TEMPERATURES WILL BE IN THE LOW TO MID TEENS. NAM SHOWS A CLOSED 500 MB LOW OVER SOUTHERN IL 00Z MON WITH A BROAD RIDGE OVER THE WESTERN U. THE RIDGE MOVES INTO THE PLAINS BY 00Z WED WHILE A DEEP 500 MB TROUGH MOVES INTO THE EASTERN U.
THEN WARMER TEMPERATURES AGAIN TO START THE WORK WEEK.
LOW PRESSURE MOVING INTO THE NORTHERN PLAINS WILL MOVE TO ILLINOIS SUNDAY AND OHIO VALLEY LATE SUNDAY.
WEAK HIGH PRESSURE WILL CONTINUE TO BUILD IN FROM THE WEST AND W/NW WINDS WILL SLOWLY WEAKEN THROUGH THE NIGHT UNDER CLEAR SKIES. THE WELL MIXED ATMOSPHERE WILL TAKE SOME TIME OVERNIGHT TO STABILIZE AND EXPECT TEMPS TO SLOWLY FALL THROUGH THE 40S INTO THE 30S AFTER MIDNIGHT AND BOTTOM OUT IN THE LOWER TO MIDDLE 30S INLAND AND UPPER 30S NEAR THE COAST. BRIEF SUB-FREEZING TEMPS POSSIBLE ACROSS NORMALLY COLDER INLAND LOCATIONS BUT SINCE WIDESPREAD FREEZE NOT EXPECTED. WEAK HIGH PRESSURE WILL SINK SOUTH OF THE REGION ACROSS THE FLORIDA PENINSULA BY AFTERNOON WITH LOW LEVEL WINDS BACKING TO THE SOUTHWEST AT AROUND 10 MPH UNDER MOSTLY SUNNY SKIES WITH JUST A FEW HIGH CLOUDS AT TIMES. HIGHS SHOULD PUSH BACK INTO THE LOWER TO MIDDLE 60S.
DOWNSLOPE SFC WARM ADVECTION THIS AFTERNOON EXTENDS WAY BACK INTO MONTANA AND SOUTHERN SASKATCHEWAN WITH A BACK DOOR COLD FRONT OVER THE MINNESOTA ARROWHEAD. I NUDGED SNOW AMOUNTS DOWN IN THE SOUTH A COUPLE TENTHS THINKING TEMPS WOULD BE A BIT WARMER AND PRECIP WOULD BE MORE OF A MIX.
/ISSUED 605 PM EST SAT JAN 24 2015/ DRY AND CLEAR CONDITIONS ARE PREVAILING ACROSS THE STATE TODAY AS UPPER LEVEL LOW CONTINUES TO LIFT UP THE EAST COAST. WITH INCREASING HIGH LEVEL CLOUDS BY SUNDAY AFTERNOON WITH AS A STRONG AND COLD LOW PRESSURE SYSTEM APPROACHES THE STATE FROM THE NORTHWEST.
411 PM MST SAT JAN 24 2015 MSAS PRESSURE TENDENCY TRENDS OVER THE PAST FEW HOURS INDICATE PRESSURE FALLS ARE STEADILY INCREASING OVER THE HIGH COUNTRY. WHILE THE LEESIDE TROUGH IS WEAKENING. CANCELLED THE HIGH WIND WARNING EARLY AS THE THREAT FOR STRONG WINDS IS PRETTY MUCH OVER DUE TO THE RELAXING GRADIENT. IT WILL BE GUSTY TONIGHT FOR MANY PANHANDLE LOCATIONS WITH GUSTS OF 35 TO 40 MPH ESPECIALLY ALONG EXPOSED RIDGETOPS BUT SHOULD REMAIN UNDER ADVISORY CRITERIA.
A STRONG UPPER RIDGE CONTINUES TO BUILD AND AMPLIFY OVER THE FORECAST AREA AND REGION THIS EVENING. THIS HAS PROVIDED CLEARING SKIES AND WARMER TEMPERATURES TO MUCH OF THE CWA TODAY. THE EXCEPTION IS IN THE LOWER COLUMBIA BASIN OF WASHINGTON WHERE THERE WAS TRAPPED COLD AIR AND TEMPERATURES THERE AND TEMPERATURES ONLY REACHED INTO THE MID 40S.
642 PM EST SAT JAN 24 2015 HIGH PRESSURE BUILDING IN BEHIND A COLD FRONT WILL KEEP VFR CONDITIONS THROUGH THE TAF PERIOD. /ISSUED 249 PM EST SAT JAN 24 2015/ COLD FRONT HAS NEARLY CLEARED THE AREA EARLY THIS AFTERNOON WITH ONLY VERY LIGHT SHOWERS ALONG THE LEADING EDGE ACROSS THE ATLANTIC WATERS. A COOLER AND DRIER AIR MASS WILL THEN DOMINATE SOUTH FLORIDA THROUGH THE REMAINDER OF THE WEEKEND AS HIGH PRESSURE BUILDS ACROSS THE GULF OF MEXICO.
ON SUNDAY THE NEXT COLD FRONT WILL BE MOVING THROUGH THE SOUTHEAST U.
CHATTANOOGA AIRPORT, TN 32 54 36 42 / 0 30 40 20 KNOXVILLE MCGHEE TYSON AIRPORT, TN 31 50 35 40 / 0 20 60 40 OAK RIDGE, TN 31 50 35 40 / 0 40 60 40 TRI CITIES AIRPORT, TN 27 50 35 37 / 0 10 70 70.
21Z SURFACE ANALYSIS PLACES A 1028 MB RIDGE OF HIGH PRESSURE OVER SOUTHERN TEXAS THIS AFTERNOON. THIS RIDGE OF HIGH PRESSURE EXTENDS INTO THE LOWER MISSISSIPPI VALLEY THIS AFTERNOON AND IS BRINGING SUNNY SKIES AND TEMPERATURES IN THE 50S AT MANY LOCATIONS.
UPSTREAM RIDGE THAT HAS BEEN DRIVING THE NORTHWEST FLOW ALOFT THIS AFTERNOON STARTS TO SHIFT EAST TONIGHT WHILE IT GETS FLATTEN BY ANOTHER SURGE OF JET ENERGY MOVING ACROSS SOUTHERN BC AND ALBERTA. THIS ALLOWS THE NEXT LEESIDE TROUGH TO BEGIN DEVELOPING OVERNIGHT AND CAUSES GAP FLOW WINDS TO BEGIN INCREASING AGAIN. MODELS NOT HINTING AT AS DISTINCT A LEESIDE TROUGH BUT SUSPECT GRADIENTS WILL SUFFICIENTLY TIGHTEN UP TO KEEP GAP FLOW WINDS AT ADVISORY LEVELS.
WHILE THE RIDGE OVER THE GULF OF MEXICO SLIDES CLOSER TO THE FLORIDA PENINSULA OVERNIGHT. AS THIS RIDGE APPROACHES WINDS WILL TURN TO THE NORTH AND RELAX QUICKLY AFTER MIDNIGHT OVER THE WESTERN MARINE AREAS FIRST.
600 PM CST SAT JAN 24 2015 UPPER LEVEL LOW PRESSURE WILL DROP DOWN FROM THE NORTHERN PLAINS BEFORE SHUNTING OFF TO THE EAST.
THIS EVENING THROUGH SUNDAY NIGHT LATEST SFC ANALYSIS SHOWS THE LOW PRESSURE CENTER CURRENTLY OVER NORTHEASTERN SOUTH DAKOTA DIVING SOUTHEASTWARD. WITH HIGH PRESSURE OVER THE NORTHERN ROCKIES. THE UPPER RIDGE WILL BEGIN TO BUILD INTO THE AREA FROM THE WEST WITH HIGH PRESSURE AT THE SURFACE.
GUIDANCE FORECASTS TEND TO UNDERDO MIXING AHEAD OF COLD FRONTS IN SOUTHWEST FLOW AND HAVE INCREASED HIGHS AND SFC WINDS WITH THIS IN MIND. NORTHWEST FLOW WILL SEND AN UPPER LEVEL TROUGH AND ASSOCIATED COLD FRONT ACROSS THE ARKLAMISS SUNDAY AFTERNOON AND EVENING. CONVECTIVE TEMPERATURES IN THE UPPER 40S TO MID 50S ALONG THE HIGHWAY 82 CORRIDOR COMBINED WITH SIGNIFICANT HEIGHT FALLS/LIFT WILL PROMOTE SOME LIGHT SHOWER DEVELOPMENT.
TONIGHT AND SUNDAY THE LATEST RAP ANALYSIS AND SATELLITE/RADAR IMAGERY SHOW A SOUTHWARD MOVING ARCTIC COLD FRONT REACHING THE U. AN ARCTIC COLD FRONT WILL BE DROPPING SOUTH ACROSS THE AREA THIS EVENING WHILE A CLIPPER TRACKS SOUTHEAST ACROSS THE CENTRAL PLAINS AND INTO THE CENTRAL MISSISSIPPI VALLEY. TO THE LOWER 20S IN THE SOUTH. MEANWHILE ARCTIC HIGH PRESSURE WILL BE BUILDING SOUTHEAST OVER LAKE SUPERIOR.
BEFORE GRADUALLY CLEARING FROM N TO S SUNDAY AFTERNOON AS A DEEPENING UPPER LEVEL TROUGH SHIFTS S ACROSS THE SRN PLAINS AND MS VALLEY. THIS TROUGH WILL ALLOW FOR A WEAK COLD FRONT TO MOVE THROUGH THE AREA SUNDAY MORNING THROUGH EARLY AFTERNOON. A COLD FRONT. AS UPPER LOW BEGINS TO WRAP UP AND DIVE SE ACROSS THE OHIO VALLEY TOMORROW. UPPER LVL RIDGING OVER WESTERN STATES WILL FLATTEN OUT BY MID WEEK AS THE ZONAL FLOW AND SEASONALLY WARM TEMPS CONTINUE FOR THE REGION.
939 PM EST SAT JAN 24 2015 LOW PRESSURE MOVES FARTHER AWAY TONIGHT.
BRISK NE-N WINDS ON BACKSIDE OF THE LOW SUNDAY EVE MAY CAUSE SOME DRIFTING SNOW.
912 PM CST SAT JAN 24 2015 HAD A REPORT FROM A NWS EMPLOYEE SOUTH OF VIRGINIA MN OF FREEZING DRIZZLE. ADDED A MENTION OF PATCHY FREEZING DRIZZLE OVER CENTRAL AND SOUTHERN ST. COLD FRONT HAS CLEARED THE FA AND TEMPS CONTINUE TO DROP. A COLD FRONT WAS MOVING IN FROM THE NORTH RESULTING IN COLDER NORTHERLY WINDS AND SOME CLEARING SKIES.
WINDS WILL START TO DIMINISH OVERNIGHT SO TEMPS WILL BE ABLE TO COOL INTO THE LOWER TO MIDDLE 30S. FREEZING FOG IS POSSIBLE. THE NEXT SYSTEM STARTS TO TAKE SHAPE OVERNIGHT AS AN UPPER TROUGH DEEPENS AND WILL DIG INTO THE MID MISSISSIPPI VALLEY AND EVENTUALLY DIG SOUTH INTO THE SOUTHEASTERN STATES.
It now appears there is decent agreement that the low will track se much farther sw through the Evansville Tri State region Sunday. Enough cold air may work in on the back side of the low Sunday evening to turn any leftover precip to light snow or flurries, but not expecting any travel impacts at this time.
735 PM EST SAT JAN 24 2015 AVIATION A COLD FRONT WILL COME THROUGH TONIGHT WITH SOME FLURRIES OR LIGHT SNOW SHOWERS.
This will bring many interior locations very near the freezing point, with parts of our N GA zones and SE AL, even dropping to near 30 degrees.
AND WITH WARMER AIR OVER NEBRASKA AND IOWA BEING PULLED NORTHEASTWARD TONIGHT INTO NORTHEAST IOWA/FAR SOUTHWEST WI. WITH THE MAIN ACCUMULATING SNOW OCCURRING SOUTH AND WEST OF THE HIGHWAY 52 CORRIDOR ACROSS SOUTHEAST MINNESOTA/NORTHEAST IOWA. THE LOW EXITS THE REGION ON SUNDAY WITH SNOW ENDING.
IN THE WAKE OF THE TROUGH. FOR THE LOW TONIGHT THOUGH.
A COLD FRONT IS PUSHING THROUGH THE DEEP SOUTH AND WILL MOVE THROUGH THE AREA LATER THIS MORNING WITH THE UPPER TROUGH SWINGING THROUGH THE STATE THIS AFTERNOON. THE AREA SHOULD QUICKLY CLEAR OUT WITH COOLER AND DRIER AIR MOVING INTO THE AREA FOR TONIGHT AND MONDAY AS LOW PRESSURE BUILDS IN FROM THE WEST. AND IN THE LOWER 40S TO AROUND 50 CENTRAL AND SOUTH FOR TONIGHT.
TONIGHT THROUGH MONDAY NIGHT WINDS WILL SUBSIDE LATER THIS EVENING AS LOW PRESSURE CONTINUES PUSHING EAST AND THE PRESSURE GRADIENT RELAXES. ANOTHER WARM FRONT WILL MOVE THROUGH THE CWA SUNDAY NIGHT WITH A PUSH OF MILD AIR BEHIND IT. WILL SEE RISING TEMPS SUNDAY NIGHT AS WINDS SWITCH TO THE WEST AND INCREASE BEHIND THE WARM FRONT. MONDAY SHAPING UP TO BE A VERY MILD DAY WITH WELL ABOVE NORMAL TEMPS AS WE SIT IN THE WARM SECTOR OF THE LOW PRESSURE SYSTEM DROPPING SOUTHEAST ACROSS THE NORTHERN PLAINS. COLD FRONT THEN MOVES THROUGH MONDAY NIGHT WITH A CHANCE OF LIGHT SNOW AS WELL.
/ISSUED 348 PM CST SAT JAN 17 2015/ (Tonight and Sunday) The cold front is along the Interstate 10 corridor at mid-afternoon, and moving south.
HAVE SIDED TOWARDS THE WARMER SIDE OF GUIDANCE WITH 40S ACROSS CENTRAL SOUTH DAKOTA.
358 AM EST SUN JAN 18 2015 A WEAK COLD FRONT WILL CROSS THE AREA THIS MORNING.
352 AM CST SUN JAN 18 2015 COLD FRONT WAS LOCATED ALMOST AT THE COAST HAVING PUSHED THROUGH KSGR/KHOU. THE FRONT SHOULD BE OFF THE COAST THE NEXT HOUR OR TWO AND INTO THE GULF AS HIGH PRESSURE BUILDS OVER SE TX TODAY. TEMPS SHOULD DROP INTO THE LOW/MID 40S THIS MORNING FOR THE START OF THE MARATHON. WINDS WILL TURN FROM THE NORTH TO NORTHEAST WITH HIGH PRESSURE OVER THE AREA. THIS HELPS AMPLIFY THE PATTERN WITH A RIDGE OVER THE PAC COAST AND ANOTHER TROUGH FORMING OVER THE DESERT SW BY THUR. ANOTHER COLD FRONT PUSHES THROUGH THE AREA WED AS HIGH PRESSURE BUILDS OVER THE PLAINS. A STRONG SHORT WAVE MOVES DOWN THROUGH THE PLAINS THUR IN TO FRI AND HELPS SHEAR OUT THE TROUGH OVER THE DESERT SW.
1151 PM EST SAT JAN 17 2015 A COLD FRONT OVER THE PLAINS WILL MOVE ACROSS THE AREA SUNDAY MORNING.
DRY AIR WILL BE MOVING OVER THE STATE TONIGHT AND WINDS ARE CONFINED TO THE HIGHEST ELEVATIONS. MODELS SHOW LEE TROUGHING AND A WELL FORMED MTN WAVE OVERNIGHT. THE SHALLOW DEPTH OF THIS MOISTURE SHOULD KEEP ANY SNOW AMOUNTS ON THE LOW SIDE. LOW PRESSURE ON THE PLAINS WILL HELP SUPPORT PERIODS OF GUSTY WEST- NORTHWEST WINDS THROUGH THE DAY. THIS DOWNSLOPE FLOW WILL RESULT IN WARMER TEMPERATURES TOMORROW WITH HIGHS GENERALLY IN THE MID AND UPPER 50S AT LOWER ELEVATIONS.
THE MEAN LOW AND MID-LEVEL FLOW WILL BACK TONIGHT INTO SUNDAY ALLOWING DOWNSLOPE CONTRIBUTION AND WARMER TEMPERATURES BY SUNDAY AFTERNOON.
WE EXPECT THIS TO LEAD TO A RATHER UNSETTLED BLUSTERY DAY WITH POTENTIALLY SEVERAL INCHES OF SNOWFALL IN THE HIGH COUNTRY. STRONG WARM AIR ADVECTION AHEAD OF THE SURFACE FRONT TO THE WEST WILL CREATE A CLIMATOLOGICALLY FAVORED PATTERN FOR FREEZING RAIN FROM FORSYTH TO AROUND MILES CITY THIS MORNING. THE COLD FRONT ASSOCIATED WITH THE SHORT WAVE ENERGY ALOFT WILL SWING THROUGH OUR FORECAST AREA THIS EVENING. BUT THERE WAS NOT GOOD AGREEMENT WITH THE MODELS SHOWING A LEE TROUGH. ARTHUR A WARM FRONT WILL LIFT E THROUGH THE AREA TODAY BRINGING A CHANCE OF RAIN AND SNOW SHOWERS FROM KBIL W. SNOW AND FREEZING RAIN TO AREAS E OF KBIL DURING THE MORNING.
HIGH PRESSURE WILL RESULT IN DRY CONDITIONS AND ABOVE NORMAL TEMPERATURES THROUGH MONDAY.
A weak cold front will pass through the area this morning. Very little temperature difference was noted across the cold front as of 06Z, so it is not too surprising that the latest guidance is showing high temperatures similar to yesterday (in the 60s). The main effect of the cold front will be clearing skies and some breezy northwest winds during the afternoon; a few gusts could reach around 20 knots.
SLIGHTLY WARMER ON MONDAY WITH HIGHS IN THE LOW TO MID 70S DUE TO WEAK SWLY LOW LVL FLOW AND WAA PATTERN.
A NORTH NORTHWESTERLY FLOW WILL BACK MORE TO THE WEST OVERNIGHT AS AN UPPER RIDGE AXIS MOVES EAST ACROSS THE CENTRAL AND NORTHERN ROCKIES. AS THE DOWNSLOPE FLOW IMPROVES A TROUGH OF LOW PRESSURE WILL BEGIN TO DEVELOP AT THE SURFACE ACROSS EASTERN COLORADO AFTER MIDNIGHT. GIVEN THESE WIND SPEEDS OVERNIGHT ALONG WITH DOWNSLOPE FLOW WILL FAVOR THE WARMER GUIDANCE FOR OVERNIGHT LOWS. ACROSS NORTH CENTRAL KANSAS HIGHS WILL BE SLIGHTLY COOLER. A COLD FRONT WILL SWING THROUGH THE REGION AS WELL DURING THIS TIMEFRAME, BRINGING STRONG COLD ADVECTION ALOFT. THIS DOES NOT LOOK LIKE A WIDESPREAD OR EVEN A HIGH QPF EVENT AT THIS TIME; THE ECMWF IS COMPLETELY DRY AND THE GFS INDICATES LIGHT QPF SO SOME POTENTIAL FOR SPRINKLES OF FLURRIES MIGHT NOT BE RULED OUT ON THE HIGHER TERRAIN.
This band of light rain is setting up just ahead of a 500mb trough axis and surface frontal boundary currently over the Wabash River Valley. Thermal profiles will be too warm in the low levels, so still only mentioning rain. A very weak clipper will actually move into the lower Ohio Valley by Monday afternoon, with light warm advection across the southern part of KY. This will set up a subtle temperature gradient with lows tonight in the lower 30s across our south, and in the upper 20s north. Highs on Monday should be a degree or two warmer than today, so looking for mid 50s southwest to mid 40s NE.
1241 AM EST SUN JAN 18 2015 A COLD FRONT OVER THE PLAINS WILL MOVE ACROSS THE AREA SUNDAY MORNING.
A WARM FRONT ASSOCIATED WITH THIS LOW EXTENDS SOUTH TOWARD LAKE MICHIGAN WITH A COLD FRONT TRAILING SOUTH OF IT THROUGH NORTHEAST TO SOUTHWEST MINNESOTA. SOME CLOUDS MAY LINGER LONGER IN WESTERN TO NORTH CENTRAL WISCONSIN WHERE THE CORE OF THE TROUGH/LOW WILL BE CLOSER.
THIS EVENING THROUGH SUNDAY NIGHT 21Z SURFACE ANALYSIS HAD HIGH PRESSURE SLIDING THROUGH THE ROCKIES WITH MODERATELY TIGHT PRESSURE GRADIENT OVER THE SD PLAINS. WATER VAPOUR HAD UPPER RIDGE OVER THE WESTERN UNITED STATES HEADING EAST. BREEZY SPOTS WILL CONTINUE/REDEVELOP OVER NORTHEAST WY WHERE ISALLOBARIC FORCING BETTER DEFINED GIVEN EXPECTED PRESSURE FALLS ALONG/AHEAD OF DEVELOPING WARM FRONT FROM MT INTO CENTRAL WY. THIS LOW WILL PUSH THE WARM FRONT THROUGH THE CWA BRINGING WARMER TEMPERATURES. UPPER RIDGE CONTINUES TO FLATTEN AS COLD FRONT APPROACHES FROM THE NORTHWEST BEHIND AFOREMENTIONED LOW. BUT HAVE RAISED READINGS IN THE NORMALLY WARMER FOOTHILLS AREAS OF THE BLACK HILLS GIVEN PATTERN.
UPGRADED THE HIGH WIND WATCH FOR THE CODY FOOTHILLS TO A WARNING AND ISSUED HIGH WIND WARNING FOR PORTIONS OF SOUTHERN FREMONT COUNTY AND NATRONA COUNTY.
/ISSUED 252 PM CST SAT JAN 17 2015/ COLD FRONT CURRENTLY SLIDING THROUGH EASTERN OKLAHOMA IS NEAR A KJLN TO KGLE LINE AT THIS HOUR. THIS COLD FRONT WILL BE NOTHING BUT A DISTANT MEMORY ON SUNDAY AS EVEN WARMER TEMPERATURES ARE ANTICIPATED. THE MAIN CONCERN ON SUNDAY WILL BE FIRE WEATHER WITH WINDS EXPECTED TO PICK UP OUT OF THE SOUTHWEST AS A WEAK SURFACE TROF MOVES INTO CENTRAL OKLAHOMA.
STILL POSSIBLE TO SEE A FEW FLURRIES IN THE HIGH ELEVATIONS GIVEN THERMAL PROFILES BUT AM NOT LOOKING AT ANY ISSUES DUE TO TEMPS AT OR SLIGHTLY ABOVE FREEZING AND AOA 20 POPS. /ISSUED 225 PM EST SAT JAN 17 2015/ MAIN FOCUS ON SHORT TERM WILL BE WITH ANY PRECIP CHANCES ACROSS NORTH GEORGIA LATE TONIGHT INTO SUNDAY MORNING WITH AN APPROACHING UPPER TROUGH AND TRANSLATED SFC COLD FRONT. GENERAL CONSENSUS OF GUIDANCE INDICATES THAT WHILE THE TROUGH AMPLIFIES AND DIGS SOUTHWARD. PROGGED THERMAL PROFILES HAVE SOME DISCREPANCIES WITH THE WARMER NAM INDICATING MAINLY A LIGHT RAIN. SFC TEMPS WERE MAINLY ABOVE FREEZING FOR OVERNIGHT LOWS TONIGHT THOUGH SOME SPOTTY 31-32 DEG ARE POSSIBLE IN THE NE.