For many years I have noticed ducting of VHF Noaa Weather Radio stations that generally occur along the Oceanfront anytime during the year but mainly during the spring and summer . This is a common occurrence here at my qth , I am not sure
how prevalent these are inland . I will attempt to document the ducting , which is usually caused by the difference in sea and air temps , esp cooler sea temps that are commonly overun by much warmer air some height above the cooler air. This allows the vhf to travel beyond the line of sight , sometimes for hundreds of miles outside normal listening area. This can be all north, all South or both of conditions allow, rarely West. Generally these are best during times of no wind, although not as a strict rule.
Radio used is a Unimetrics Seahawk model 24 Marine radio, 12 feet above sea level using only a 12 inch jumper clip as antenna . That way eliminates any possibility of reception due to elevation. The orientation of the wire seems to be more important than the quality of the antenna.
These can disappear and reappear at any given minute. Closer stations in the path may not be heard at all.
Home station is KHB37 Driver Va on 162.550 mhz.
The temps will be for my location. The mileage is straight line or flight distance
I realize this is an obscure and possibly location based DX target , but if you notice any out of area stations please note.
http://www.nws.noaa.gov/nwr/coverage/station_listing.html6/17/18 KHB38 162.400 Mt Holly Nj / Atlantic City. Strong /flight dist 193mi Sea temp 71/ air 84.9 slight breeze 1604UT
Gone 1723 Ut
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Sea temp 71/ air 77.9 calm 340 UT 6/18/18 KEC92 162.475 Salisbury MD / Delmar strong / FD 109mi 340UT
6/18/18 Unid. 162.475 weak 340 UT
6/18/18 KEC83 162.400 Baltimore MD / Pikesville / moderate /FD 179mi 358 UT
6/18/18 WXJ94 162.550 Lewes Delaware/ Green Hill / strong over KHB37 / FD 140mi 434 UT.
6/18/18 KEC92 162.475 Salisbury MD/Delmar/ moderate / FD 109mi 1310 UT calm Air 80.1 F
6/18/18 KHB38 162.400 Atlantic City NJ/ Mt Holly /weak / CD 193mi 1314 UT
6/18/18 KJY99 162.525 Accomack Va/ Onley / moderate, weak/ FD 60mi 1349UT
6/18/18
WXM80 162.475 Upton NY/Riverhead/ strong / FD 289mi/ fcst Hartford,New Haven, New London 1653 UT
6/18/18 WXM57 162.400 Heathsville Va/ moderate / FD 78mi 2154 UT[/
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Sea Temp 79 air 77.3 calm
6/19/18 WWH26 162.425 Mamie NC/ Outer banks / weak / FD 59mi 0024 UT faded 0046 UT 300watts
6/19/19 KEC92 162.475 Salisbury MD/Delmar/ moderate/ FD 109mi 0041UT
6/19/18 310 UTC no stations
Sea 75 air 83.1 calm
6/19/18 WWG33 162.450 Margarettsville NC / Margarettsville/ weak/ 76mi 1213 UT 300wts southwest
6/19/18 KEC92 162.475 Salisbury MD / Delmar/ moderate/FD 109mi 1216 UT
6//19/18 WWH26 162.425 Mamie NC/ Mamie/ strong/ FD 59mi 1220 300wts
no stations 1400 UT
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Sea 76 Air 78.4 winds briefly up to 40mph around 2300
6/20/18 KIG77 162.475 Cape Hatteras NC/ Buxton / weak / FD 112mi 201 UT
Also Accomack and Heathsville very weak back up after storm listed Out of Service
no other Stations
6/20/18 KEC92 162.475 Salisbury MD/Delmar/ weak fading/ FD 109 mi/ 1229 UT
no other stations
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Sea 76 Air 75.2 calm
6/21/18 KIG77 162.475 Cape Hatteras NC/ Buxton / strong/ FD 112mi 404 UT
6/21/18 WWH26 162.425 Mamie NC/ Outer Banks/ moderate w fading/ FD 59mi Faded 410 UT
6/21/18 Unid 162.525 garbled
6/21/18 KJY99 162.525 Accomack Va/ Onley/very weak/ 60mi 430 UT
Very nice South with armchair copy KIG77
Sea 81 air 83.7
6/21/18 No Stations 2300 UT
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Sea 78 air 80.4 Thunderstorms http://www.ospo.noaa.gov/data/sst/contour/natlanti.cf.gif
6/22/18 WWH26 162.425 Mamie NC / weak 59mi 115 UT faded 130 UT
6/22/18 KIG77 162.475 Hatteras NC weak/ 112mi 125 UT faded 130 UT
Very short duration , faded to noise at the same time
no other stations
Sea 77 Air 80.2 rain wind 13kts
6/22/18no stations 1758 UT
6/22/18no stations 2320 UT
--------------------------------------------------------------
Sea 80.3 Air 87.3 Storms
6/23/18 6/23/18 No Stations 2100 UT
6/24/18 no stations 200 UTC
Sea 79.9 Air 83.3 calm
6/24/18 WNG37 162.450 Washington DC / moderate/ 153mi / 1308 UT
6/24/18 KEC83 162.400 Baltimore MD / Pikesville /strong/FD 179mi / 1310UT
6/24/18 KEC92 162.475 Salisbury MD / Delmar/ strong /FD 109mi /1310UT,
6/24/18 KJY99 162.525 Accomack Va/ Onley / strong / FD 60mi 1318UT
strong North
__________________________________________________________________
Sea 82.7 Air 89
6/25/18. KEC92. 162.475 Salisbury MD / moderate/ 109mi / 0053
6/25/18 WXM57 162.400 Heathsville Va/ weak / 78mi / 0053 Ut
6/25/18. kJY99 162.525 Accomack Va/Onley/ weak/ 60mi/ 0054 UT
6/25/18 no stations 1856 UT
-----_---------------------------- ---------------------------------------
Sea 77 Air 79 windy
6/26/18 no stations 1544 UT
-------------------------------------------------
6/27/18no stations 402 UT
6/27/18 no stations 1416 UT
-------------------'---'------------------------------------
Sea 78 Air 75.6 w 5kts SE
6/28/18 KJY99 162.525 Accomack VA /Onley / strong/60mi 350UT
6/28/18 KEC92 162.475 Salisbury MD/ Delmar/ strong/ 109mi
6/28/18 Unid 162.475 under KEC92 unreadable
6/28/18 Unid 162.450 unreadable
6/28/18 KEC83 162.400 Baltimore/ Pikesville/ weak/ 179mi / 409UT
6/28/18 no stations 1238 UT
Sea 77 Air 92.1
6/28/18 no stations 2012 UT
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Sea 79.5 Air 77.7 calm
6/29/18no stations 356 UT
6/29/18 no stations 1243 UT
Sea 79 Air 85.6 breezy
6/29/18 WWH96 162.425 Mamie NC / moderate/ 59mi / 2020 UT
6/29/18 wXM57 162.400 Heathsville Va / weak/ 78mi/ 2020 UT
---------------------------------------_---------------------------------
6/30/18 no stations 2246 UT
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Sea 82.4 Air 79.9
7/1/18 KEC92 162.475 Salisbury MD/ strong/ 109miles 305 UT
7/1/18 WNG591 162.500 Coudersport PA/ Coudersport/ moderate / 357mi Id 328z 600watts
7/1/18 KJY99 162.525 Accomack Va/ strong/ 60mi 347UT i
---_------------------------------------------------------------------------------------------
Sea 82 Air 81.5
7/2/18 KEC92 162.475 Salisbury MD / strong/ 109mi 142 UT
/2/18 WWH26 162.425 Mamie NC / weak/ 59mi/142 UT
7/2/18 WXK97 162.500 Sudlersville MD/ moderate/ 162mi /201 UT
7/2/18 KEC92 162.475 Salisbury MD/ strong 109mi / 1142 UT
7/2/18 WWG33 162.450 Margarettsville NC /weak/76mi / 1146 UT
7/2/18 WXM57 162.400 Heathsville Va/ strong/ 78 mi/ 1148 UT
-----------------------------------------------------------------------------------------------
7/3/18 no stations 1421 UT
==============,,=,=======,===============================
Sea 83.7 Air 79.9
7/4/18 KHB38 162.400 Atlantic City NJ/ My Holly/ moderate-weak/ 193 mi/,417 UT
7/4/18 KJY99 162.525 Accomack / strong/ 60mi/ 418 IT
no other stations
---------------------------------------------------------------------------------------'
7/5/18
no stations 256 UT
7/5/18 No stations 2226 UT
7/6/18 no stations
7/7/18 no stations
7/8/18 no stations
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Sea 78.2 Air 76.8 winds currently 12Kts was 25 -30
7/9/18 KHB38 162.400 Atlantic City NJ/ Mt Holly/ strong/ 193 mi /1655 UT
7/9/18 KIG77 162.475 Cape Hatteras NC/ Buxton/ strong/ 112mi/ 1656 UT
7/9/18 KJY99/ 162.525 Accomack / strong/60mi/ 1659 UT
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7/10/18 Sea 80 Air 85.1 breeze
7/10/18 no stations 1847 UT
----------------------------------------------------------------------------------------
Sea 78 Air 73.0 calm
7/11/18 KIG77 162.475 / Cape Hatteras NC/ strong/112 mi 252 UT
7/11/18 WWH56 162.425/ Mamie NC/ Strong / 59mi
7/11/18 KJY99 162.525/ Accomack / strong 60mi 253 UT7/13/18
7/13/18 no stations
________________________________________________
7/19/18 WXL59 162.475 Rocky Mt NC/Tarboro/ moderate /109mi /1313 Ut
8/6/18 WXM80 162.475 Upton NY/Riverhead/ strong / FD 289mi/ fcst Hartford,New Haven, New London 2150 UT
-----------------------end of logs-------------------------------------
The reception from Baltimore , Washington DC , inland Maryland and Pennsylvania , these are due North of the receiver if you draw a line and I believe they tropo straight down the Chesapeake Bay.
Hatteras is probably as far South i will hear, because the coastline turns West abruptly at Buxton NC . Although I have heard New Bern NC before, it is rare.
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