An answer to Sprout's question

Severe Thunderstorm Warning

Severe Thunderstorm Warning
CTC001-NJC003-013-017-031-039-NYC005-047-059-061-071-081-085-087-119-
180000-
/O.NEW.KOKX.SV.W.0035.190717T2319Z-190718T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service New York NY
719 PM EDT Wed Jul 17 2019
The National Weather Service in Upton NY has issued a
* Severe Thunderstorm Warning for...  Southern Fairfield County in southern Connecticut...  Hudson County in northeastern New Jersey...  Passaic County in northeastern New Jersey...  Union County in northeastern New Jersey...  Bergen County in northeastern New Jersey...  Essex County in northeastern New Jersey...  Southeastern Orange County in southeastern New York...  Queens County in southeastern New York...  Richmond County in southeastern New York...  Bronx County in southeastern New York...  Kings County in southeastern New York...  Rockland County in southeastern New York...  Westchester County in southeastern New York...  New York (Manhattan) County in southeastern New York...  Northwestern Nassau County in southeastern New York...
* Until 800 PM EDT.
* At 718 PM EDT, severe thunderstorms were located along a line  extending from near Unionville to near Stanhope to Ferndale, moving  east at 50 mph.
  HAZARD...60 mph wind gusts.
  SOURCE...Radar indicated.
  IMPACT...Expect damage to trees and power lines.
* Severe thunderstorms will be near...  Pompton Lakes and Caldwell around 745 PM EDT.  Wayne around 750 PM EDT.  Paterson and Passaic around 755 PM EDT.  Plainfield and Hackensack around 800 PM EDT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Damaging winds and continuous cloud to ground lightning is occurring
with these storms. Move indoors immediately.
Lightning is one of nature`s leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4049 7428 4050 7426 4060 7422 4060 7446      4067 7446 4076 7436 4090 7434 4090 7427      4100 7430 4104 7444 4126 7431 4130 7346      4129 7346 4101 7349 4099 7360 4086 7375      4092 7354 4056 7382
TIME...MOT...LOC 2318Z 266DEG 45KT 4133 7457 4092 7475 4055 7518
HAIL...<.75IN
WIND...60MPH

looks threatening here in WO


Radar looks ominous for sure.


and he-e-e-e-e-re they are


Flash Flood Warning

Flash Flood Warning
NJC003-013-017-039-NYC005-047-059-061-081-085-119-180215-
/O.NEW.KOKX.FF.W.0007.190718T0019Z-190718T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service New York NY
819 PM EDT Wed Jul 17 2019
The National Weather Service in Upton NY has issued a
* Flash Flood Warning for...  Hudson County in northeastern New Jersey...  Union County in northeastern New Jersey...  Southeastern Bergen County in northeastern New Jersey...  Essex County in northeastern New Jersey...  South central Westchester County in southeastern New York...  Queens County in southeastern New York...  Richmond County in southeastern New York...  Bronx County in southeastern New York...  Kings County in southeastern New York...  New York (Manhattan) County in southeastern New York...  Western Nassau County in southeastern New York...
* Until 1015 PM EDT.
* At 818 PM EDT, Doppler radar indicated thunderstorms producing  heavy rain across the warned area. Flash flooding is expected to  begin shortly.
* Some locations that will experience flooding include...  Newark, Jersey City, Jamaica, Yonkers, Elizabeth, Flatbush, New  Rochelle, Flushing, Passaic, Bayonne, Mott Haven, Hoboken,  Plainfield, Bloomfield and East Tremont. Rainfall rates of 2 to 4  inches per hour are possible with these thunderstorms.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Yeah my phone just buzzed with the flash flood warning.

I've been looking at lightningmaps.org. Never heard of it before. Watching the thunder sound wave on the map and hearing the rumble as the wave hits my house on the map is surreal.

Edited to correct the url.


mrincredible said:
Yeah my phone just buzzed with the flash flood warning.
I've been looking at lightningmaps.org. Never heard of it before. Watching the thunder sound wave on the map and hearing the rumble as the wave hits my house on the map is surreal.
Edited to correct the url.

 That's a fun one.


Special Weather Statement

Special Weather Statement
National Weather Service New York NY
808 PM EDT Wed Jul 17 2019
NJZ004-006-104>108-NYZ071>075-078-176>179-180115-
Hudson-Eastern Union-Eastern Essex-Western Union-Western
Essex-Eastern Bergen-Eastern Passaic-Northern Nassau-Kings
(Brooklyn)-Northern Queens-Northwest Suffolk-Southern
Queens-Bronx-Southern Westchester-New York (Manhattan)-Richmond
(Staten Is.)-Southern Nassau-
808 PM EDT Wed Jul 17 2019
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT HUDSON...EASTERN
PASSAIC...UNION...SOUTHEASTERN BERGEN...ESSEX...QUEENS...RICHMOND...
BRONX...KINGS...SOUTH CENTRAL WESTCHESTER...WEST CENTRAL SUFFOLK...
NEW YORK (MANHATTAN) AND NASSAU COUNTIES...
At 807 PM EDT, radar indicated strong thunderstorms were located
along a line extending from Jackson Heights to Middlesex. Movement
was east at 15 mph.
Wind gusts up to 50 mph are possible with these storms.
Locations impacted include...
Newark, Jersey City, Jamaica, Elizabeth, Flatbush, New Rochelle,
Flushing, Passaic, Bayonne, Mott Haven, Levittown, Hoboken,
Plainfield, Bloomfield and East Tremont.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

max_weisenfeld said:
 That's a fun one.

 It reminds me of the old Missile Command arcade game.


mrincredible said:


max_weisenfeld said:
 That's a fun one.
 It reminds me of the old Missile Command arcade game.

Wow -- https://www.lightningmaps.org/ is cool!  

I found the legend that tells what the circles and their colors mean (and that they darken over time), but I can't find what the triangles are. Do you know?


The triangles are high points -- peaks -- in the terrain.  The closest to us are Nob Hill and Mayapple Hill in the Reservation.


I am curious how the lightning map works. It sounds like there are multiple detection points and I guess they can triangulate the approximate position of the lightning by the time delay in the light travelling to different spots?

I also wonder about accuracy. There were some bullseyes on that map that looked like we should be hearing about trees or houses getting hit.



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