April 20, 2026

Tropical Storm Watches for Big Island in effect…Each part of Island has a seperate Watch and probabilities. See this entire posting for all details.

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KOHALA:

Tropical Storm Watch
Alert:
...TROPICAL STORM WATCH IN EFFECT... 
 
A Tropical Storm Watch means tropical storm-force winds are possible 
somewhere within this area within the next 48 hours 
 
* LOCATIONS AFFECTED 
- Kawaihae 
- Waikoloa Village 
- Mahukona 
 
* WIND 
- LATEST LOCAL FORECAST: Below tropical storm force wind 
- Peak Wind Forecast: 25-35 mph with gusts to 50 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. 
 
* STORM SURGE 
- No storm surge inundation forecast 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Little to no storm 
surge flooding 
- PLAN: There is little to no threat of storm surge flooding. 
Rough surf, coastal erosion, and life-threatening rip 
currents are possible. 
- PREPARE: Little to no preparations for storm surge flooding 
are needed. 
- ACT: Follow the instructions of local officials. Monitor 
forecasts. 
- POTENTIAL IMPACTS: Little to None 
- Little to no potential impacts from storm surge flooding. 
 
* FLOODING RAIN 
- LATEST LOCAL FORECAST: Flood Watch is in effect 
- Peak Rainfall Amounts: Additional 1-3 inches, with locally 
higher amounts 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for 
moderate flooding rain 
- PLAN: Emergency plans should include the potential for 
moderate flooding from heavy rain. Evacuations and rescues 
are possible. 
- PREPARE: Consider protective actions if you are in an area 
vulnerable to flooding. 
- ACT: Heed any flood watches and warnings. Failure to take 
action may result in serious injury or loss of life. 
- POTENTIAL IMPACTS: Significant 
- Moderate rainfall flooding may prompt several evacuations 
and rescues. 
- Rivers and tributaries may quickly become swollen with 
swifter currents and overspill their banks in a few places, 
especially in usually vulnerable spots. Small streams, 
creeks, canals, arroyos, and ditches overflow. 
- Flood waters can enter some structures or weaken 
foundations. Several places may experience expanded areas 
of rapid inundation at underpasses, low-lying spots, and 
poor drainage areas. Some streets and parking lots take on 
moving water as storm drains and retention ponds overflow. 
Driving conditions become hazardous. Some road and bridge 
closures. 
 
* TORNADO 
- LATEST LOCAL FORECAST: 
- Situation is somewhat favorable for tornadoes 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few 
tornadoes 
- PLAN: Emergency plans should include the potential for a 
few tornadoes. 
- PREPARE: If your shelter is particularly vulnerable to 
tornadoes, prepare to relocate to safe shelter before 
hazardous weather arrives. 
- ACT: If a tornado warning is issued, be ready to shelter 
quickly. 
- POTENTIAL IMPACTS: Limited 
- The occurrence of isolated tornadoes can hinder the 
execution of emergency plans during tropical events. 
- A few places may experience tornado damage, along with 
power and communications disruptions. 
- Locations could realize roofs peeled off buildings, 
chimneys toppled, mobile homes pushed off foundations or 
overturned, large tree tops and branches snapped off, 
shallow-rooted trees knocked over, moving vehicles blown 
off roads, and small boats pulled from moorings.

KONA:

TROPICAL STORM WATCH IN EFFECT... 
 
A Tropical Storm Watch means tropical storm-force winds are possible 
somewhere within this area within the next 48 hours 
 
* LOCATIONS AFFECTED 
- Kailua-Kona 
- Captain Cook 
- Milolii 
 
* 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. 
 
* STORM SURGE 
- No storm surge inundation forecast 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Little to no storm 
surge flooding 
- PLAN: There is little to no threat of storm surge flooding. 
Rough surf, coastal erosion, and life-threatening rip 
currents are possible. 
- PREPARE: Little to no preparations for storm surge flooding 
are needed. 
- ACT: Follow the instructions of local officials. Monitor 
forecasts. 
- POTENTIAL IMPACTS: Little to None 
- Little to no potential impacts from storm surge flooding. 
 
* FLOODING RAIN 
- LATEST LOCAL FORECAST: Flood Watch is in effect 
- Peak Rainfall Amounts: Additional around 1 inch 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for 
moderate flooding rain 
- PLAN: Emergency plans should include the potential for 
moderate flooding from heavy rain. Evacuations and rescues 
are possible. 
- PREPARE: Consider protective actions if you are in an area 
vulnerable to flooding. 
- ACT: Heed any flood watches and warnings. Failure to take 
action may result in serious injury or loss of life. 
- POTENTIAL IMPACTS: Significant 
- Moderate rainfall flooding may prompt several evacuations 
and rescues. 
- Rivers and tributaries may quickly become swollen with 
swifter currents and overspill their banks in a few places, 
especially in usually vulnerable spots. Small streams, 
creeks, canals, arroyos, and ditches overflow. 
- Flood waters can enter some structures or weaken 
foundations. Several places may experience expanded areas 
of rapid inundation at underpasses, low-lying spots, and 
poor drainage areas. Some streets and parking lots take on 
moving water as storm drains and retention ponds overflow. 
Driving conditions become hazardous. Some road and bridge 
closures. 
 
* TORNADO 
- LATEST LOCAL FORECAST: 
- Situation is somewhat favorable for tornadoes 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few 
tornadoes 
- PLAN: Emergency plans should include the potential for a 
few tornadoes. 
- PREPARE: If your shelter is particularly vulnerable to 
tornadoes, prepare to relocate to safe shelter before 
hazardous weather arrives. 
- ACT: If a tornado warning is issued, be ready to shelter 
quickly. 
- POTENTIAL IMPACTS: Limited 
- The occurrence of isolated tornadoes can hinder the 
execution of emergency plans during tropical events. 
- A few places may experience tornado damage, along with 
power and communications disruptions. 
- Locations could realize roofs peeled off buildings, 
chimneys toppled, mobile homes pushed off foundations or 
overturned, large tree tops and branches snapped off, 
shallow-rooted trees knocked over, moving vehicles blown 
off roads, and small boats pulled from moorings. 

BIG ISLAND EAST:
TROPICAL STORM WATCH IN EFFECT... 
 
A Tropical Storm Watch means tropical storm-force winds are possible 
somewhere within this area within the next 48 hours 
 
* LOCATIONS AFFECTED 
- Naalehu 
- Pahala 
 
* WIND 
- LATEST LOCAL FORECAST: Below tropical storm force wind 
- Peak Wind Forecast: 15-25 mph with gusts to 40 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. 
 
* STORM SURGE 
- LATEST LOCAL FORECAST: Localized storm surge possible 
- Peak Storm Surge Inundation: The potential for up to 2 feet 
above ground somewhere within surge prone areas 
- Window of concern: Tuesday evening until Wednesday afternoon 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm 
surge flooding greater than 1 foot above ground 
- PLAN: Plan for storm surge flooding greater than 1 foot 
above ground. 
- PREPARE: Efforts should now be underway to prepare for 
storm surge flooding, especially in low-lying vulnerable 
areas. 
- ACT: Take actions to protect life and property. Prepare to 
leave if evacuation orders are given for your area. 
- POTENTIAL IMPACTS: Limited 
- Localized inundation with storm surge flooding mainly along 
immediate shorelines and in low-lying spots, or in areas 
farther inland near where higher surge waters move ashore. 
- Sections of near-shore roads and parking lots become 
overspread with surge water. Driving conditions dangerous 
in places where surge water covers the road. 
- Moderate beach erosion. Heavy surf also breaching dunes, 
mainly in usually vulnerable locations. Strong rip currents. 
- Minor to locally moderate damage to marinas, docks, 
boardwalks, and piers. A few small craft broken away from 
moorings. 
 
* FLOODING RAIN 
- LATEST LOCAL FORECAST: Flood Watch is in effect 
- Peak Rainfall Amounts: Additional 4-8 inches, with locally 
higher amounts 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for 
moderate flooding rain 
- PLAN: Emergency plans should include the potential for 
moderate flooding from heavy rain. Evacuations and rescues 
are possible. 
- PREPARE: Consider protective actions if you are in an area 
vulnerable to flooding. 
- ACT: Heed any flood watches and warnings. Failure to take 
action may result in serious injury or loss of life. 
- POTENTIAL IMPACTS: Significant 
- Moderate rainfall flooding may prompt several evacuations 
and rescues. 
- Rivers and tributaries may quickly become swollen with 
swifter currents and overspill their banks in a few places, 
especially in usually vulnerable spots. Small streams, 
creeks, canals, arroyos, and ditches overflow. 
- Flood waters can enter some structures or weaken 
foundations. Several places may experience expanded areas 
of rapid inundation at underpasses, low-lying spots, and 
poor drainage areas. Some streets and parking lots take on 
moving water as storm drains and retention ponds overflow. 
Driving conditions become hazardous. Some road and bridge 
closures. 
 
* TORNADO 
- LATEST LOCAL FORECAST: 
- Situation is somewhat favorable for tornadoes 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few 
tornadoes 
- PLAN: Emergency plans should include the potential for a 
few tornadoes. 
- PREPARE: If your shelter is particularly vulnerable to 
tornadoes, prepare to relocate to safe shelter before 
hazardous weather arrives. 
- ACT: If a tornado warning is issued, be ready to shelter 
quickly. 
- POTENTIAL IMPACTS: Limited 
- The occurrence of isolated tornadoes can hinder the 
execution of emergency plans during tropical events. 
- A few places may experience tornado damage, along with 
power and communications disruptions. 
- Locations could realize roofs peeled off buildings, 
chimneys toppled, mobile homes pushed off foundations or 
overturned, large tree tops and branches snapped off, 
shallow-rooted trees knocked over, moving vehicles blown 
off roads, and small boats pulled from moorings. 

BIG ISLAND EAST:
TROPICAL STORM WATCH IN EFFECT... 
 
A Tropical Storm Watch means tropical storm-force winds are possible 
somewhere within this area within the next 48 hours 
 
* LOCATIONS AFFECTED 
- Hilo 
- Pahoa 
- Volcano 
 
* WIND 
- LATEST LOCAL FORECAST: Equivalent Tropical Storm force wind 
- Peak Wind Forecast: 30-40 mph with gusts to 55 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. 
 
* STORM SURGE 
- LATEST LOCAL FORECAST: Localized storm surge possible 
- Peak Storm Surge Inundation: The potential for up to 2 feet 
above ground somewhere within surge prone areas 
- Window of concern: Tuesday evening until Wednesday afternoon 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm 
surge flooding greater than 1 foot above ground 
- PLAN: Plan for storm surge flooding greater than 1 foot 
above ground. 
- PREPARE: Efforts should now be underway to prepare for 
storm surge flooding, especially in low-lying vulnerable 
areas. 
- ACT: Take actions to protect life and property. Prepare to 
leave if evacuation orders are given for your area. 
- POTENTIAL IMPACTS: Limited 
- Localized inundation with storm surge flooding mainly along 
immediate shorelines and in low-lying spots, or in areas 
farther inland near where higher surge waters move ashore. 
- Sections of near-shore roads and parking lots become 
overspread with surge water. Driving conditions dangerous 
in places where surge water covers the road. 
- Moderate beach erosion. Heavy surf also breaching dunes, 
mainly in usually vulnerable locations. Strong rip currents. 
- Minor to locally moderate damage to marinas, docks, 
boardwalks, and piers. A few small craft broken away from 
moorings. 
 
* FLOODING RAIN 
- LATEST LOCAL FORECAST: Flood Watch is in effect 
- Peak Rainfall Amounts: Additional 4-8 inches, with locally 
higher amounts 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for 
moderate flooding rain 
- PLAN: Emergency plans should include the potential for 
moderate flooding from heavy rain. Evacuations and rescues 
are possible. 
- PREPARE: Consider protective actions if you are in an area 
vulnerable to flooding. 
- ACT: Heed any flood watches and warnings. Failure to take 
action may result in serious injury or loss of life. 
- POTENTIAL IMPACTS: Significant 
- Moderate rainfall flooding may prompt several evacuations 
and rescues. 
- Rivers and tributaries may quickly become swollen with 
swifter currents and overspill their banks in a few places, 
especially in usually vulnerable spots. Small streams, 
creeks, canals, arroyos, and ditches overflow. 
- Flood waters can enter some structures or weaken 
foundations. Several places may experience expanded areas 
of rapid inundation at underpasses, low-lying spots, and 
poor drainage areas. Some streets and parking lots take on 
moving water as storm drains and retention ponds overflow. 
Driving conditions become hazardous. Some road and bridge 
closures. 
 
* TORNADO 
- LATEST LOCAL FORECAST: 
- Situation is somewhat favorable for tornadoes 
- THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST 
UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few 
tornadoes 
- PLAN: Emergency plans should include the potential for a 
few tornadoes. 
- PREPARE: If your shelter is particularly vulnerable to 
tornadoes, prepare to relocate to safe shelter before 
hazardous weather arrives. 
- ACT: If a tornado warning is issued, be ready to shelter 
quickly. 
- POTENTIAL IMPACTS: Limited 
- The occurrence of isolated tornadoes can hinder the 
execution of emergency plans during tropical events. 
- A few places may experience tornado damage, along with 
power and communications disruptions. 
- Locations could realize roofs peeled off buildings, 
chimneys toppled, mobile homes pushed off foundations or 
overturned, large tree tops and branches snapped off, 
shallow-rooted trees knocked over, moving vehicles blown 
off roads, and small boats pulled from moorings.

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