ChescoWx Posted yesterday at 03:58 PM Share Posted yesterday at 03:58 PM I thought it would be of interest to do some deep analysis into my own weather station data that has been operational in East Nantmeal since November 2003 vs. The only NOAA Climate Reference Network (CRN) station here in Chester County which is the PA Avondale 2N station. These CRN stations are a highly specialized weather station designed to provide long-term, high-quality measurements of climate variables like temperature and precipitation. In essence, CRN stations serve as a high-precision benchmark for monitoring the nation's climate, ensuring the availability of reliable data for understanding and addressing climate change. I ran an analysis of East Nantmeal vs. Avondale 2N over the last 18 years that we have both been recording the weather. I have to say I am pretty pleased to see that our observations could not get much closer than this – exactly the same average temperature over 18 years of data!! I have only used a Davis Vantage Pro 2 station with the fan aspirated shield over the entire 22 years I have been recording data. Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 04:36 PM Share Posted yesterday at 04:36 PM Another slight risk in effect. Will this translate to any rainfall, though? "A modest enhancement to the westerlies aloft may contribute to as much as 25 kt effective shear, supportive of sustained clusters and linear segments. Steep low-level lapse rates and high-water content suggests damaging downbursts are likely, especially with any organized clusters this afternoon through around mid-evening. This most favored corridor for downbursts/tree damage is expected to focus east of the Blue Ridge across eastern portions of Virginia/Maryland into southeast Pennsylvania and New Jersey." Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 05:29 PM Share Posted yesterday at 05:29 PM Flood watch day two Most guidance is meh only the RGEM is bullish 1 Link to comment Share on other sites More sharing options...
LVblizzard Posted yesterday at 05:49 PM Share Posted yesterday at 05:49 PM Radar looks juicy AF over central PA. Favorable environment out ahead of everything too. Could be a fun late afternoon/evening. 1 Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 05:58 PM Share Posted yesterday at 05:58 PM 8 minutes ago, LVblizzard said: Radar looks juicy AF over central PA. Favorable environment out ahead of everything too. Could be a fun late afternoon/evening. For whatever reason the NAM and Hrrr missed the current activity 1 Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted yesterday at 06:22 PM Author Share Posted yesterday at 06:22 PM Here we go - Quote SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 496 NWS STORM PREDICTION CENTER NORMAN OK 140 PM EDT TUE JUL 8 2025 SEVERE THUNDERSTORM WATCH 496 IS IN EFFECT UNTIL 900 PM EDT FOR THE FOLLOWING LOCATIONS PAC001-011-017-025-029-041-043-045-071-075-077-089-091-095-099- 101-107-133-090100- /O.NEW.KWNS.SV.A.0496.250708T1740Z-250709T0100Z/ PA . PENNSYLVANIA COUNTIES INCLUDED ARE ADAMS BERKS BUCKS CARBON CHESTER CUMBERLAND DAUPHIN DELAWARE LANCASTER LEBANON LEHIGH MONROE MONTGOMERY NORTHAMPTON PERRY PHILADELPHIA SCHUYLKILL YORK $$ Quote SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 496 NWS STORM PREDICTION CENTER NORMAN OK 140 PM EDT TUE JUL 8 2025 SEVERE THUNDERSTORM WATCH 496 IS IN EFFECT UNTIL 900 PM EDT FOR THE FOLLOWING LOCATIONS NJC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029- 031-033-035-037-039-041-090100- /O.NEW.KWNS.SV.A.0496.250708T1740Z-250709T0100Z/ NJ . NEW JERSEY COUNTIES INCLUDED ARE ATLANTIC BERGEN BURLINGTON CAMDEN CAPE MAY CUMBERLAND ESSEX GLOUCESTER HUDSON HUNTERDON MERCER MIDDLESEX MONMOUTH MORRIS OCEAN PASSAIC SALEM SOMERSET SUSSEX UNION WARREN $$ Quote SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 496 NWS STORM PREDICTION CENTER NORMAN OK 140 PM EDT TUE JUL 8 2025 SEVERE THUNDERSTORM WATCH 496 IS IN EFFECT UNTIL 900 PM EDT FOR THE FOLLOWING LOCATIONS DEC001-003-005-090100- /O.NEW.KWNS.SV.A.0496.250708T1740Z-250709T0100Z/ DE . DELAWARE COUNTIES INCLUDED ARE KENT NEW CASTLE SUSSEX $$ Quote SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 496 NWS STORM PREDICTION CENTER NORMAN OK 140 PM EDT TUE JUL 8 2025 SEVERE THUNDERSTORM WATCH 496 IS IN EFFECT UNTIL 900 PM EDT FOR THE FOLLOWING LOCATIONS ANZ335-338-355-430-431-450-451-452-453-454-455-530-531-532-533- 534-535-536-537-538-539-540-541-542-543-630-631-635-636-650-652- 090100- /O.NEW.KWNS.SV.A.0496.250708T1740Z-250709T0100Z/ CW . ADJACENT COASTAL WATERS INCLUDED ARE LONG ISLAND SOUND WEST OF NEW HAVEN CT/PORT JEFFERSON NY NEW YORK HARBOR SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM CHESAPEAKE BAY NORTH OF POOLES ISLAND MD CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA PATAPSCO RIVER INCLUDING BALTIMORE HARBOR CHESTER RIVER TO QUEENSTOWN MD EASTERN BAY CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER PATUXENT RIVER TO BROOMES ISLAND MD TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH ISLAND CHESAPEAKE BAY FROM SMITH POINT TO WINDMILL POINT VA CHESAPEAKE BAY FROM WINDMILL POINT TO NEW POINT COMFORT VA RAPPAHANNOCK RIVER FROM URBANNA TO WINDMILL POINT YORK RIVER COASTAL WATERS FROM FENWICK ISLAND DE TO CHINCOTEAGUE VA OUT 20 NM COASTAL WATERS FROM CHINCOTEAGUE TO PARRAMORE ISLAND VA OUT 20 NM $$ ATTN...WFO...OKX...AKQ...LWX...PHI...RNK...CTP... So far have had a high of 93 and currently 92 with dp 78. 1 Link to comment Share on other sites More sharing options...
Lady Di Posted yesterday at 07:55 PM Share Posted yesterday at 07:55 PM Sort of scared of T-storms. Might bug outta work a little early. That Thursday storm a couple of weeks ago was heck-drove home right into it. Last year a bad one came thru and the wind broke a window on the house. Won't forget that crashing noise. Year or 2 before that lost a shed. Literally blew off the foundation and came back all mangled. Have a feeling these maybe some heavy hitters. Radar lighting up with warnings north and west of here. 2 Link to comment Share on other sites More sharing options...
KamuSnow Posted yesterday at 08:14 PM Share Posted yesterday at 08:14 PM 2 hours ago, LVblizzard said: Radar looks juicy AF over central PA. Favorable environment out ahead of everything too. Could be a fun late afternoon/evening. SPC & WPC are interested, mesoscale discussions mentioned potential for a lot of rain. 1 Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 08:41 PM Share Posted yesterday at 08:41 PM Incoming juicy darkness 2 Link to comment Share on other sites More sharing options...
Kevin Reilly Posted yesterday at 08:43 PM Share Posted yesterday at 08:43 PM Just now, RedSky said: Incoming juicy darkness Still sunny here gathering clouds west and southwest very low rumble of thunder way off in the distance. Sunny 93f feels like 103 humidity 53% 1 Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 08:47 PM Share Posted yesterday at 08:47 PM A few wind damage and flash flood reports. Link to comment Share on other sites More sharing options...
Violentweatherfan Posted yesterday at 08:54 PM Share Posted yesterday at 08:54 PM Future radar has the line somewhat dissipating Link to comment Share on other sites More sharing options...
limslady Posted yesterday at 08:57 PM Share Posted yesterday at 08:57 PM Some dime sized hail currently in Douglassville. 1 Link to comment Share on other sites More sharing options...
LVblizzard Posted yesterday at 08:57 PM Share Posted yesterday at 08:57 PM That storm near Pottstown right now looks pretty crazy. Unfortunately here in Allentown it looks like we’ll just get some heavy rain and a few rumbles of thunder. Link to comment Share on other sites More sharing options...
mattinpa Posted yesterday at 08:58 PM Share Posted yesterday at 08:58 PM Just now, LVblizzard said: That storm near Pottstown right now looks pretty crazy. Unfortunately here in Allentown it looks like we’ll just get some heavy rain and a few rumbles of thunder. How’s it looking for Royersford? Still a severe thunderstorm warning but language has tornado possible. Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 09:05 PM Share Posted yesterday at 09:05 PM 8 minutes ago, LVblizzard said: That storm near Pottstown right now looks pretty crazy. Unfortunately here in Allentown it looks like we’ll just get some heavy rain and a few rumbles of thunder. Yes it's now trying to slip to my south Link to comment Share on other sites More sharing options...
mattinpa Posted yesterday at 09:13 PM Share Posted yesterday at 09:13 PM Sideways rain and quite dark here 1 Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:14 PM Share Posted yesterday at 09:14 PM 20 minutes ago, Violentweatherfan said: Future radar has the line somewhat dissipating The models had it falling apart a bit. But as of now, looks like this line is doing well. Tops are still over 50kft. Some good strong updrafts in there. I'll probably get nothing, now. lol Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:21 PM Share Posted yesterday at 09:21 PM The National Weather Service in Mount Holly NJ has issued a * Tornado Warning for... Northwestern Montgomery County in southeastern Pennsylvania... West central Bucks County in southeastern Pennsylvania... * Until 545 PM EDT. * At 519 PM EDT, a severe thunderstorm capable of producing a tornado was located near Spring Mount, or 20 miles east of Reading, moving east at 30 mph. HAZARD...Tornado. SOURCE...Radar indicated rotation. Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:21 PM Share Posted yesterday at 09:21 PM Another one: The National Weather Service in Mount Holly NJ has issued a * Tornado Warning for... Southeastern Montgomery County in southeastern Pennsylvania... East central Chester County in southeastern Pennsylvania... Northwestern Philadelphia County in southeastern Pennsylvania... Northern Delaware County in southeastern Pennsylvania... * Until 545 PM EDT. * At 520 PM EDT, a severe thunderstorm capable of producing a tornado was located over King Of Prussia, or 14 miles northeast of West Chester, moving east at 40 mph. HAZARD...Tornado and quarter size hail. SOURCE...Weather spotters reported funnel cloud. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted yesterday at 09:23 PM Author Share Posted yesterday at 09:23 PM Am under a TOR. EAS Warned. 1 1 Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:24 PM Share Posted yesterday at 09:24 PM Just now, Hurricane Agnes said: Am under a TOR. Pics or it didn't happen. 1 Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted yesterday at 09:35 PM Author Share Posted yesterday at 09:35 PM Getting hit with a gust front - I peeped out and the winds suddenly came. Looks like around Jenkintown (about 4 miles NE of me) may have had the rotation. 1 Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 09:36 PM Share Posted yesterday at 09:36 PM Putting on a good show to the south nice view of it here eating water ice 1 Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted yesterday at 09:40 PM Author Share Posted yesterday at 09:40 PM Getting the rains now and winds are pretty fierce. Temp dropped and down to 81 with dp 76. Sky is black. 1 Link to comment Share on other sites More sharing options...
mattinpa Posted yesterday at 09:43 PM Share Posted yesterday at 09:43 PM I was barely out of the 2 tornado warnings. Did get wind, very heavy rain and some lightning. 1 Link to comment Share on other sites More sharing options...
RedSky Posted yesterday at 09:45 PM Share Posted yesterday at 09:45 PM Wicked spin on radar 2 Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:46 PM Share Posted yesterday at 09:46 PM I'd love to be in Maryland right now! Looks like the line is going to play chicken with a sea breeze, too. That is some advanced warning for the Delaware Bay, as well! 1 1 Link to comment Share on other sites More sharing options...
BBasile Posted yesterday at 09:48 PM Share Posted yesterday at 09:48 PM 3 minutes ago, RedSky said: Wicked spin on radar Like a top. Link to comment Share on other sites More sharing options...
Hurricane Agnes Posted yesterday at 09:48 PM Author Share Posted yesterday at 09:48 PM Getting >1.5"/hr rain rates. Have 0.28" in the bucket at post time. Temp down to 75 with dp 73. 1 Link to comment Share on other sites More sharing options...
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