Disaster Management

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Based on Merged Mean Areal Precipitation at 1730 IST, rainfall is up to 1 mm in last 6 hours and up to 7 mm in last 24 hours over few watersheds and neighborhood of Himachal Pradesh, Jammu & Kashmir & Ladakh, Uttarakhand and Tamil Nadu - Puducherry & Karaikal Met subdivisions. Land Surface Model shows few nearly saturated watersheds up to 60 to 70 % over Jammu & Kashmir & Ladakh and Uttarakhand Met subdivisions and up to 40 % soil saturation over remaining parts of the country

Flood Alert Categories

Generally speaking, the NWS issues flood alerts either on a county basis, or for particular rivers and streams. Those alerts are divided into several basic categories:

  • Flood watches: Issued when conditions suggest a possibility of flooding, or if flooding is anticipated within 12-48 hours.
  • Flood warnings: More severe, issued if widespread flooding is expected across a large region, or if flooding is imminent or actively taking place.
  • Flash flood watches and warnings: Follow the same protocol but indicate potential for especially rapid flooding, usually from heavy rain or dam failure.
  • Flood statements: Issued when flooding is expected along major streams where people and property are not threatened. They may also update previous warning and watch alerts.

In the U.S., these alerts are distributed in Specific Area Message Encoding through the Emergency Alert System and the NOAA Weather Radio network.

Developing a Flood Warning Program

In communities that lack a flood warning program but are interested in developing their own, the NWS can provide further guidance and technical support, as well as outreach and education to involved parties and community leadership. A flood warning system need not be expensive or overly complicated, and the benefits — protecting lives and property — far outweigh any potential complications or inconveniences.

When it comes to the installation and maintenance of gages, sensors, and other equipment, Fondriest Environmental can help you through every step of the process.

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Alert
Flood Watch

Issued when there's a possibility of flooding within 12–48 hours

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Alert
Flood Warning

Issued when widespread flooding is expected, or if flooding is already happening

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Alert
Flood Statement asessment

Issued when flooding is expected along major streams, but people and property aren't threatened

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