Invest 92L

[JamesG161]

Alert out now and the Hurricane Hunters left from Kessler AFB at 5:00am CST.

They are surveying the storm now.

We are monitoring this fixed station on the path now.

NDBC - Station 41117 Recent Data

New warnings soon!

Jim...

 

[WayneH]

Technology: Being able to tell the wind is blowing 15-20 knots from starboard while moving forward at 300 knots.

 

[rgranger]

So when is it going to hit Charleston

 

[capta]

Let's just hope that it won't stop and "cook" in the Gulfstream for a couple of days.

 

[JamesG161]

Let's just hope that it won't stop and "cook" in the Gulfstream for a couple of days.

But Invest 92L is doing this now.

Raining out as it comes ashore.

Jim...

PS: Hurricane Hunter heading back home.

 

[jssailem]

Technology:

Yes It is amazing.
Using dropwindsondes.
P-3 Orion: Into the Storm

Slicing through the eyewall of a hurricane, buffeted by howling winds, blinding rain and violent updrafts and downdrafts before entering the relative calm of the storm’s eye, NOAA’s two Lockheed WP-3D Orion four-engine turboprop aircraft, affectionately nicknamed "Kermit" (N42RF) and "Miss Piggy" (N43RF), probe every wind and pressure change, repeating the often grueling experience again and again during the course of an 8-10 hour mission.

Scientists aboard the aircraft deploy Global Positioning System (GPS) dropwindsondes as NOAA Corps officers pilot and navigate the P-3 through the hurricane. These instruments continuously transmit measurements of pressure, humidity, temperature, and wind direction and speed as they fall toward the sea, providing a detailed look at the structure of the storm and its intensity. The P-3s' tail Doppler radar and lower fuselage radar systems, meanwhile, scan the storm vertically and horizontally, giving scientists and forecasters a real-time look at the storm. The P-3s can also deploy probes called bathythermographs that measure the temperature of the sea.

 

[WayneH]

I knew about the drop sondes. But I was looking at the recon map and there are wind barbs from where they launched out to sea. And there are a lot more wind barbs than there are available drops. So how do they measure wind speed and direction without a dropsonde?

 

[JamesG161]

So how do they measure wind speed and direction without a dropsonde?

That was a Hurricane Hunter flight.

Newest NOAA Aircraft have Doppler Radar in the Nose section.

No Dropsonde dropped on both missions for the HH flights.

Jim...

PS: look here for more info
About the NOAA Aircraft Fleet | Office of Marine and Aviation Operations

 

[JamesG161]

opps @WayneH

Update the post for more info on NOAA Aircraft.

As a Moderator i was updating without showing the update

My Bad...

 

[JamesG161]

More Invest 92L Rain heading toward South Carolina

Get out your umbrellas

@Kermit , @smokey73 , @rgranger

Jim...

 

[capta]

We had some pretty violent unforecasted weather pass through Charleston one day when I lived there. Years later the powers that be were still undecided as to whether it was a hurricane or not.

 

[shemandr]

Today in South Florida there were basically random showers including some zitt/boom events but no wind. Rain was at times heavy but not unusually so here. Not sure if this weather is related to the on/off tropical event off Jacksonville.
I'll venture you Charlestown folks don't have to go to ground (Well there's no ground to go to!).
Listen to some CCR "Have you ever seen the rain" and chill.

 

[Johann]

I knew about the drop sondes. But I was looking at the recon map and there are wind barbs from where they launched out to sea. And there are a lot more wind barbs than there are available drops. So how do they measure wind speed and direction without a dropsonde?

The barbs are flight level winds. They are calculated by comparing the aircraft true airspeed and heading with the ground speed and ground track.