ATL GUSTAV: Tropical Depression - Discussion

[Innotech]

the loop is a VERY warm current that flows between the yucatan channel. another loop is south of florida, where both Katrina and Rita blew up into 175 mph cat 5 monsters. It is basically not a very good thing for a storm to pass through there uninhibited. Especially a compact, rapid intensification storm like gustav. Things could get ugly.
As a dispatcher for a gasoline transportation company, buy your gasoline right now because its going to get really stupid really fast.

[lamsalfl]

Yeah, I'm going to cap off my tank tomorrow just in case. So compact storms blow up faster huh? Grreat

[Hurricanewatcher2007]

Yeah, I'm going to cap off my tank tomorrow just in case. So compact storms blow up faster huh? Grreat

Yeah small more compact storms tend to strengthen fast but they can also weaken faster as well and it takes less to make them weaken however I don't see anything to make it weaken quickly at this time!

[lamsalfl]

I'm thinking it will RI as a compact storm, then expand with age.

[Chacor]

The forecast contest for Gustav remains open until 5 am Eastern (if you've already made a prediction you can always change it, but please do so in a new post): viewtopic.php?f=25&t=102744

[RL3AO]

83 kt 30-sec average flight level with a 90kt gust

[Chacor]

EDIT: See RL3AO's post.

[lamsalfl]

I just hope we don't have to see any of these important messages EVER again unless needed of course to scare people straight.

http://en.wikipedia.org/wiki/National_W ... letin_text

[artist]

should be interesting later today. Good night all.

[lamsalfl]

83 kt 30-sec average flight level with a 90kt gust

and what does this translate to on the surface? I don't know the formulas and all.

[Aric Dunn]

3 mb drop in the last hour.. that quite a drop.. and Fl up to 90kts

[RL3AO]

83 kt 30-sec average flight level with a 90kt gust

and what does this translate to on the surface? I don't know the formulas and all.

85 mph or so.

[jenmrk]

I found this-maybe it will help those of us that are not informed.


Conversion table for
knots to miles per hour
KTS to MPH 5 Knots = 5.8 MPH
10 Knots = 11.5 MPH
15 Knots = 17.3 MPH
20 Knots = 23.0 MPH
25 Knots = 28.8 MPH
30 Knots = 34.6 MPH
35 Knots = 40.3 MPH
40 Knots = 46.1 MPH
45 Knots = 51.8 MPH
50 Knots = 57.6 MPH
55 Knots = 63.4 MPH
60 Knots = 69.1 MPH
65 Knots = 74.9 MPH
70 Knots = 80.6 MPH
75 Knots = 86.4 MPH
80 Knots = 92.2 MPH
85 Knots = 97.9 MPH
90 Knots = 103.7 MPH
95 Knots = 109.4 MPH
100 Knots = 115.2 MPH
105 Knots = 121.0 MPH
110 Knots = 126.7 MPH
115 Knots = 132.5 MPH
120 Knots = 138.2 MPH
125 Knots = 144.0 MPH
130 Knots = 149.8 MPH
135 Knots = 155.5 MPH
140 Knots = 161.3 MPH
145 Knots = 167.0 MPH
150 Knots = 172.8 MPH
Beaufort Wind Scale
Windspeed
in MPH Description - Visible Condition
0 Calm smoke rises vertically
1 - 4 Light air direction of wind shown by smoke but not by wind vanes
4 - 7 Light breeze wind felt on face; leaves rustle; ordinary wind vane moved by wind
8 - 12 Gentle breeze leaves and small twigs in constant motion; wind extends light flag
13 - 18 Moderate breeze raises dust and loose paper; small branches are moved
19 - 24 Fresh breeze small trees in leaf begin to sway; crested wavelets form on inland water
25 - 31 Strong breeze large branches in motion; telephone wires whistle; umbrellas used with difficulty
32 - 38 Moderate gale whole trees in motion; inconvenience in walking against wind
39 - 46 Fresh gale breaks twigs off trees; generally impedes progress
47 - 54 Strong gale slight structural damage occurs; chimney pots and slates removed
55 - 63 Whole gale trees uprooted; considerable structural damage occurs
64 - 72 Storm very rarely experienced; accompanied by widespread damage
73+ Hurricane devastation occurs

KTS to MPH 5 Knots = 5.8 MPH
10 Knots = 11.5 MPH
15 Knots = 17.3 MPH
20 Knots = 23.0 MPH
25 Knots = 28.8 MPH
30 Knots = 34.6 MPH
35 Knots = 40.3 MPH
40 Knots = 46.1 MPH
45 Knots = 51.8 MPH
50 Knots = 57.6 MPH
55 Knots = 63.4 MPH
60 Knots = 69.1 MPH
65 Knots = 74.9 MPH
70 Knots = 80.6 MPH
75 Knots = 86.4 MPH
80 Knots = 92.2 MPH
85 Knots = 97.9 MPH
90 Knots = 103.7 MPH
95 Knots = 109.4 MPH
100 Knots = 115.2 MPH
105 Knots = 121.0 MPH
110 Knots = 126.7 MPH
115 Knots = 132.5 MPH
120 Knots = 138.2 MPH
125 Knots = 144.0 MPH
130 Knots = 149.8 MPH
135 Knots = 155.5 MPH
140 Knots = 161.3 MPH
145 Knots = 167.0 MPH
150 Knots = 172.8 MPH

[RL3AO]

The warmest temps were a little sw of the center.

[lamsalfl]

looking at that hurricane hunter map on wunderground...

are those cat 2 winds at the surface??

[Chris_in_Tampa]

In terms of the Weather Underground hurricane hunter image:
http://www.wunderground.com/tropical/tr ... ml#a_topad
It's probably going with the SFMR readings, which is an estimate of 10 second averaged surface winds.

96-110 mph (1 minute sustained) is cat 2.

The Saffir-Simpson Hurricane Scale:
http://www.nhc.noaa.gov/aboutsshs.shtml

[RL3AO]

Probably 70kt (85mph) right now. It could get up a little higher before advisory time.

[Derek Ortt]

its at least 75KT

you use the 10 second wind for surface conversion. However, we have SFMR over deep water. No need to rely solely upon FL wind

[RL3AO]

its at least 75KT

you use the 10 second wind for surface conversion. However, we have SFMR over deep water. No need to rely solely upon FL wind

I forgot about the 90. I guess that means I'm tired.

[Chris_in_Tampa]

Another note about the Weather Underground hurricane hunter flight path, the wind barbs you see and the colors that represent categories of hurricane, are flight level winds, not surface winds.