What's Tropical Storm Watch/Warning, when issued?
They are a time based issued alert for Tropical Storm winds of 39mph or greater.

TS Watch: Winds possible within 48 hours or less.
TS Warning: Winds expected within 36 hours or less.
#Hilary
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Wind speed probability maps can help show percent chance of seeing 39mph or higher winds due to a tropical system. Keep in mind this is just winds from a tropical system...it won't show winds from other sources that may occur here. Check with local NWS for additional information.

The arrival time of winds map can help tell you when winds of 39mph or higher starting time may occur due to a tropical system. For the US East coast, that's enough wind speed to start to cause downed trees, scattered power outages.
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Why is top 'S' dot white for Monday while others darker?
The dark S (Tropical Storm), dark H (Hurricane), dark M (Major Hurricane (Cat3+)) are tropical system intensities.

White dot means not expected to be 'tropical' anymore, just a regular old Low. Impacts same/similar though.

Cone map?
Probably the most recognized tropical cyclone product. Reminder the cone size is not the storm size/strength, it's just the average error that far out in time where center point may be. Impacts will be felt well outside & ahead of this 'cone'
#Hilary 16Aug2023 8pPDT
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NHC works with local partners to disseminate storm information. This includes different levels of gov and National Weather Service(NWS). Your local NWS office can give you specific storm threats for your location. Visit: https://weather.gov
enter city/zip in top left box.
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Updates: Who/When:
All US Tropical Storm / Hurricane updates come from US National Hurricane Center(NHC). Apps/news use their info. Updates every 6hrs at 2 & 8a/pPDT. If Tropical Storm or Hurricane Watch/Warning issued for land then they update every 3hrs. https://hurricanes.gov

Tropical Storm #Hilary - Are you familiar with tropical cyclone products?
A thread:
16Aug2023
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Tropical Storm Fernanda, Greg and Hilary in the Pacific Wednesday afternoon.
16Aug2023

Reminder:
It’ll feel like we see these shaded regions longer with nothing happening sometimes…because we do!

In 2023 NHC started their first ~7~ day outlooks! Was 5. So you get two extra days of shade. 😎
(last image from 2aEDT 16Aug2023)

Re: potential Gulf system next week:
-NHC with 20% chance
-Strong High pressure over US would send anything West fast
-Likely blob of moisture that may try to form Low
-Not a lot of model support but conditions favorable
-Increased coastal rain chances Mexico/TX for now
15Aug2023

Hurricane #Fernanda about 2,100miles ESE of Hilo,HI.
Winds 105mph(165km/h)
Winds extend up to 90miles from center
Moving West 12mph
Possible impacts early next week (per model guidance): Increased trade winds, increased humidity, scattered showers, 6-8ft+ seas.
15Aug2023
(3/3)

Tropical Storm #Greg about 790miles SE of Hilo,HI.
Winds 50mph(85km/h)
Winds extend up to 70miles from center
Moving West 14mph
Impacts midweek (per model guidance): Minimal increase in trade winds, increased humidity, maybe some sprinkles, 6-7ft seas.
15Aug2023
(2/3)

Lots of dry air around Hawaii, Tropical Storm #Greg & Hurricane #Fernanda Tuesday! Large areas of yellow/orange(dry) on mid-level water vapor satellite, green/white moisture. Greg overall disorganized, Fernanda expected to continue weakening.
1pHST / 7pEDT 15Aug2023 #HIwx (1/3)

Our two areas in Atlantic still low chance of tropical development as tons of dry air nearby (SAL).

Models show hints of possible Gulf of Mexico system Sunday/Monday...will watch to see if models continue to trend with that idea or not ('trend is your friend'). 15Aug2023

Tropical Storm #Greg expected to pass South of Hawaii this week as moves West. Hurricane #Fernanda continues to weaken, remnants may bring welcome rain chances to HI Sunday-Tuesday time period. Another system expected to develop near Baja bringing moisture into SW US. 15Aug2023

#Dora is now a Depression with 35mph (56km/h) winds. As seen in satellite image, it's disorganized, running into a TUTT (the spin next to the colored blob of Dora). Continues moving North away from Wake. Expected to dissipate this week. 15Aug2023

Tropical Storm #Greg has formed about 1,170miles (1,885km) East-Southeast of Hilo, Hawaii. Expected to continue generally West, passing HI well to the South. NWS Honolulu says only expect slight increase in trade winds with passing (not expecting another Dora).
13Aug 11pHST #hiWX

Hurricane #Fernanda in East Pacific has continued its impressive rate of rapid intensification, now 125mph(205km/h) Cat3, forecast Cat4 soon. Expected to fall apart by weeks end.

May bring rains to Hawaii early next week as remnants pass through.
14Aug 5aEDT / 13Aug 11pHST #hiWX

Hurricane #Fernanda appears to have rapidly intensified towards sunset Sunday evening in the Eastern Pacific. 13Sun2023