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re: Tropical Storm Isaias - O Canada!

Posted on 7/31/20 at 4:04 pm to
Posted by Roll Tide Ravens
Birmingham, AL
Member since Nov 2015
42623 posts
Posted on 7/31/20 at 4:04 pm to
New advisory with hurricane warnings up for portions of the east coast of Florida:

Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35629 posts
Posted on 7/31/20 at 4:08 pm to
quote:

Isaias looks pretty good on radar:


Kind of looks like a big supercell. If not for the little bit of banding to the SE...



WV has a pretty nice moist envelope around Isaias but the center is basically on the western edge thanks to the shear. All pushing it to the NE.
Posted by Bobby OG Johnson
Member since Apr 2015
24970 posts
Posted on 7/31/20 at 4:13 pm to
Posted by rds dc
Member since Jun 2008
19812 posts
Posted on 7/31/20 at 4:17 pm to
quote:

Isaias looks pretty good on radar:


Recon inbound and will give a lot more detail. Radar looks like some dry air coming off the end of Cuba possibly working into the eastern circulation? Wouldn't be surprising give that convection has been rotating upshear with an open eyewall.
Posted by NorthEndZone
Member since Dec 2008
11334 posts
Posted on 7/31/20 at 4:27 pm to
Experts - Is that the partial eyewall in the SW part of the CDO?

Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35629 posts
Posted on 7/31/20 at 5:01 pm to


Uhh...not great to see the eye looking like it's just about closed off.
Posted by rt3
now in the piney woods of Pineville
Member since Apr 2011
141201 posts
Posted on 7/31/20 at 5:08 pm to
meanwhile... back at the ranch... it looks like I'm about to get dumped on

looks like a front is trying to come through central Louisiana right now
Posted by LaBR4
Baton Rouge
Member since Sep 2005
50840 posts
Posted on 7/31/20 at 5:10 pm to
Dr McNabb on TWC just said..

Come Monday


it'll be in the Carolinas

great Jimmy Buffet
reference

This post was edited on 7/31/20 at 5:11 pm
Posted by deltaland
Member since Mar 2011
90704 posts
Posted on 7/31/20 at 5:12 pm to
This thing got its shite together in the past hour
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35629 posts
Posted on 7/31/20 at 5:13 pm to
quote:

looks like a front is trying to come through central Louisiana right now


There is a front coming through but it's late July so kind of in name only temp wise.
Posted by OysterPoBoy
City of St. George
Member since Jul 2013
35202 posts
Posted on 7/31/20 at 5:14 pm to
quote:

a pretty nice moist envelope


Posted by Bobby OG Johnson
Member since Apr 2015
24970 posts
Posted on 7/31/20 at 5:15 pm to
Posted by rds dc
Member since Jun 2008
19812 posts
Posted on 7/31/20 at 6:03 pm to
Nice little overshooting top casting a shadow.

Posted by razorbackfan4life
Northwest Arkansas
Member since Apr 2011
8496 posts
Posted on 7/31/20 at 6:29 pm to
couple of titty clouds
Posted by Nicky Parrish
Member since Apr 2016
7098 posts
Posted on 7/31/20 at 6:42 pm to
quote:

couple of titty clouds

This one should have been “Dolly”.
Posted by Roll Tide Ravens
Birmingham, AL
Member since Nov 2015
42623 posts
Posted on 7/31/20 at 7:04 pm to
Looks like the eye is getting pretty closed off.

Posted by PorkSammich
North FL
Member since Sep 2013
14264 posts
Posted on 7/31/20 at 8:07 pm to
About to enter its best chance for strengthening.

It’s going to make a south FL landfall and shoot up the spine of FL.
Posted by Bobby OG Johnson
Member since Apr 2015
24970 posts
Posted on 7/31/20 at 8:48 pm to
Posted by Duke
Twin Lakes, CO
Member since Jan 2008
35629 posts
Posted on 7/31/20 at 8:51 pm to
Eyewall back open. That'll arrest the strengthening for a bit.
Posted by rds dc
Member since Jun 2008
19812 posts
Posted on 7/31/20 at 8:53 pm to
Product: Air Force Vortex Message (URNT12 KNHC)
Transmitted: 1st day of the month at 1:32Z
Agency: United States Air Force
Aircraft: Lockheed WC-130J Hercules with reg. number AF97-5305
Storm Number & Year: 09 in 2020
Storm Name: Isaias (flight in the North Atlantic basin)
Mission Number: 9
Observation Number: 18

A. Time of Center Fix: 1st day of the month at 0:59:20Z
B. Center Fix Coordinates: 22.98N 76.07W
B. Center Fix Location: 161 statute miles (259 km) to the NE (47°) from Camagüey, Cuba.
C. Minimum Height at Standard Level: 1,321m (4,334ft) at 850mb
D. Minimum Sea Level Pressure: 987mb (29.15 inHg)
E. Dropsonde Surface Wind at Center: From 350° at 6kts (From the N at 7mph)
F. Eye Character: Open in the south
G. Eye Shape & Diameter: Circular with a diameter of 22 nautical miles (25 statute miles)
H. Estimated (by SFMR or visually) Maximum Surface Wind Inbound: 62kts (71.3mph)
I. Location & Time of the Estimated Maximum Surface Wind Inbound: 6 nautical miles to the ENE (66°) of center fix at 0:57:30Z
J. Maximum Flight Level Wind Inbound: From 162° at 81kts (From the SSE at 93.2mph)
K. Location & Time of the Maximum Flight Level Wind Inbound: 7 nautical miles to the ENE (68°) of center fix at 0:57:00Z
L. Estimated (by SFMR or visually) Maximum Surface Wind Outbound: 53kts (61.0mph)
M. Location & Time of the Estimated Maximum Surface Wind Outbound: 6 nautical miles to the SW (232°) of center fix at 1:01:30Z
N. Maximum Flight Level Wind Outbound: From 315° at 51kts (From the NW at 58.7mph)
O. Location & Time of the Maximum Flight Level Wind Outbound: 6 nautical miles to the SW (232°) of center fix at 1:01:30Z
P. Maximum Flight Level Temp & Pressure Altitude Outside Eye: 20°C (68°F) at a pressure alt. of 1,517m (4,977ft)
Q. Maximum Flight Level Temp & Pressure Altitude Inside Eye: 25°C (77°F) at a pressure alt. of 1,510m (4,954ft)
R. Dewpoint Temp (collected at same location as temp inside eye): 22°C (72°F)
R. Sea Surface Temp (collected at same location as temp inside eye): Not Available
S. Fix Determined By: Penetration, Radar, Wind, Pressure and Temperature
S. Fix Levels (surface & flight level centers within 5nm of each other): Surface and 850mb
T. Navigational Fix Accuracy: 0.02 nautical miles
T. Meteorological Accuracy: 0.75 nautical miles

Still slowly strengthening but the open eyewall points to the system still dealing with some dry air. Also, upper air recon shows some very dry air just SW of the system meaning it might be very hard for the system to maintain such a small core and continue to strengthen.
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