Proposed Local Tropical Cyclone Watch/Warning (TCV)
Example #3 - Potential Tropical Storm Conditions
*** NOT FOR OPERATIONAL USE ***
Below you can compare the wind information provided in the current Local Tropical Cyclone Watch/Warning (TCV) text product with the proposed version which uses the “What, Where, When” format found in most other NWS products and includes explicit probabilistic forecast information to account for the uncertainty in the forecast, giving the user a heads up on the potential “worst case scenario” for their area. The text on the left below is the proposed future Local TCV. The current operational version is provided on the right. More information on this project can be found at this NWS page.
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Prototype Future Wind-Only Local TCV
Example #3 - Potential TS Conditions
HIZ024-250500-
/O.NEW.PHFO.TR.A.2008.200724T2048Z-000000T0000Z/
South Big Island-
1048 AM HST Fri Jul 24 2020
...TROPICAL STORM WATCH IN EFFECT...
* WHAT...Winds from 15-25 MPH with higher gusts are likely, but there
is a 10% chance that winds will be greater than 39 MPH somewhere in
this area.
* WHERE...South Big Island in Hawaii County, Hawaii including the cities of:
- Naalehu
- Pahala
- Hawaiian Ocean View Estates
* WHEN...Saturday morning until early Monday morning
* IMPACTS...There is the potential for limited wind impacts including damage
and road closures due to falling tree limbs. There is also the potential
for scattered power and communications outages.
* ADDITIONAL DETAILS...See https://www.weather.gov/hfo/hti for information on
other potentially dangerous weather conditions with this storm.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Efforts to protect property should be underway. Remove or secure loose items around the outside of your home. Be prepared to take alternate routes if roads close. Take action now to prepare for power and communications
outages. Ensure your devices are charged.
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Current Wind Information in the Local TCV
Example #3 - Potential TS Condition
HIZ024-250500-
/O.NEW.PHFO.TR.A.2008.200724T2048Z-000000T0000Z/
South Big Island-
1048 AM HST Fri Jul 24 2020
...TROPICAL STORM WATCH IN EFFECT...
* LOCATIONS AFFECTED
- Naalehu
- Pahala
- Hawaiian Ocean View Estates
* WIND
- LATEST LOCAL FORECAST: Below tropical storm force wind
- Peak Wind Forecast: 15-25 mph with gusts to 35 mph
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL
FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential
for wind 39 to 57 mph
- PLAN: Plan for hazardous wind of equivalent tropical storm
force.
- PREPARE: Efforts to protect property should now be
underway. Prepare for limited wind damage.
- ACT: Act now to complete preparations before the wind
becomes hazardous.
- POTENTIAL IMPACTS: Limited
- Damage to porches, awnings, carports, sheds, and unanchored
mobile homes. Unsecured lightweight objects blown about.
- Many large tree limbs broken off. A few trees snapped or
uprooted, but with greater numbers in places where trees
are shallow rooted. Some fences and roadway signs blown
over.
- A few roads impassable from debris, particularly within
urban or heavily wooded places. Hazardous driving
conditions on bridges and other elevated roadways.
- Scattered power and communications outages.
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