cieldumort
(Moderator)
Fri Aug 25 2017 05:26 AM
Re: Hurricane Harvey Strengthening and Approaching Texas

Sample Watch/Warning/Advisory from well-inland
Bexar- 1012 PM CDT Thu Aug 24 2017
...TROPICAL STORM WARNING REMAINS IN EFFECT...

* LOCATIONS AFFECTED
- San Antonio

* WIND
- LATEST LOCAL FORECAST: Below tropical storm force wind
- Peak Wind Forecast: 20-30 mph with gusts to 35 mph

- CURRENT THREAT TO LIFE AND PROPERTY: High
- The wind threat has increased from the previous assessment.
- Emergency plans should include a reasonable threat for hurricane force wind of 74 to 110 mph of equivalent Category 1 to 2 intensity.
- To be safe, aggressively prepare for the potential of extensive wind impacts. Remaining efforts to secure properties should now be brought to completion.
- Dangerous and life-threatening wind is possible. Failure to adequately shelter may result in serious injury or loss of life. Move to safe shelter before the wind becomes hazardous.

- POTENTIAL IMPACTS: Extensive
- Considerable roof damage to sturdy buildings, with some having window, door, and garage door failures leading to structural damage. Mobile homes severely damaged, with some destroyed. Damage accentuated by airborne projectiles. Locations may be uninhabitable for weeks.
- Many large trees snapped or uprooted along with fences and roadway signs blown over.
- Some roads impassable from large debris, and more within urban or heavily wooded places. Several bridges, causeways, and access routes impassable.
- Large areas with power and communications outages.

* FLOODING RAIN
- LATEST LOCAL FORECAST: Flash Flood Watch is in effect
- Peak Rainfall Amounts: Additional 8-12 inches, with locally higher amounts

- CURRENT THREAT TO LIFE AND PROPERTY: High
- The flooding rain threat has increased from the previous assessment.
- Emergency plans should include a reasonable threat for major flooding where peak rainfall totals well exceed amounts conducive for flash flooding and rapid inundation. Rescues and emergency evacuations are likely.
- To be safe, aggressively prepare for the potential of extensive flooding rain impacts.
- Life-threatening flooding is possible. Failure to take action may result in serious injury or significant loss of life. If flood related watches and warnings are issued, heed recommended actions. Poor decisions may result in being cut off or needlessly risk lives. If vulnerable, relocate to safe shelter on higher ground before flood waters arrive.

- POTENTIAL IMPACTS: Extensive
- Major rainfall flooding may prompt many evacuations and rescues.
- Rivers and tributaries may rapidly overflow their banks in multiple places. Small streams, creeks, canals, arroyos, and ditches may become dangerous rivers. In mountain areas, destructive runoff may run quickly down valleys while increasing susceptibility to rockslides and mudslides. Flood control systems and barriers may become stressed.
- Flood waters can enter many structures within multiple communities, some structures becoming uninhabitable or washed away. Many places where flood waters may cover escape routes. Streets and parking lots become rivers of moving water with underpasses submerged. Driving conditions become dangerous. Many road and bridge closures with some weakened or washed out.

* TORNADO
- LATEST LOCAL FORECAST:
- Situation is unfavorable for tornadoes



Note: This is NOT an official page. It is run by weather hobbyists and should not be used as a replacement for official sources. 
CFHC's main servers are currently located at Hostdime.com in Orlando, FL.
Image Server Network thanks to Mike Potts and Amazon Web Services. If you have static file hosting space that allows dns aliasing contact us to help out! Some Maps Provided by:
Great thanks to all who donated and everyone who uses the site as well. Site designed for 800x600+ resolution
When in doubt, take the word of the National Hurricane Center