What Is Tornado Watch

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What Is Tornado Watch

Tornado Watch (Sam Code: TOA) is a severe weather watch product issued by the National Weather Forecasting Agency. There are. In addition to the chances of a tornado developing, thunderstorms that form in the watch area may include large hail, straight winds, heavy rain, and/or flooding that could cause damage such as attendant tornado hazards. Are A watch should not be confused with a storm warning.


The Tornado Watch indicates that the environmental conditions observed in and around the Watch Area pose a significant threat to the development and intensity of severe connective thunderstorms capable of producing storms, and It is usually issued before the onset of severe weather. If severe weather occurs, a severe thunderstorm warning or storm warning will be issued. Watch Area residents and travelers are advised to take immediate safety measures before the onset of severe weather. A tornado clock is not required to issue a warning.

Storm warnings are occasionally issued when the storm clock is not active (ie, when the thunderstorm clock is active or if conditions are not expected for storm development to require the clock) Strong Circulation developed. Hurricane clocks can replace the current intense Thunderworm watch, if not just a part of it, if conditions that were originally considered moderately favorable are fully prepared for storm development, then storm formation Allows more risk.

Although storm risk is emphasized as the primary risk, depending on the severity of the storm cells, other hazardous phenomena are likely to exceed the regional severity standard: severe thunderstorms that occur within the watch area.

Even greater hailstorms are possible, with severe straight-line winds causing severe structural damage similar to flood storms caused by relatively large area collisions, heavy lightning, torrential rain, and/or accumulation of heavy rain. Can deliver A hurricane means that it is also a hurricane.

When a storm clock is issued, people within the expected hurricane danger zone are advised to review their safety precautions if they are to land in a basement, cellar, safe room, or center section. The shelter should be taken immediately in the strong room above.

Home or building (such as a bathroom or closet) when a storm warning or severe storm warning is issued for their area. Residents are also advised to monitor the situation before developing weather conditions, and alert and storm alerts via local broadcast media, whether radio, weather app alert notifications, SMS notifications, and/or automatic emergency phone calls.

Stay up to date with Where available, tornado sirens and local police or fire department dispatch units are also used as an external warning system in the event of a storm or particularly severe non-storm thunderstorms.

Regional Basis

The United States

In the United States, Hurricane Clocks are issued by the Hurricane Forecasting Center (SPC), a national guidance center of the National Weather Service (NWS), for areas of the lower 48 states where climatic conditions are developing. And with that comes intense thunder and lightning.

Although the issuance of clocks is extremely rare for these states, the responsibility for issuing storm clocks covering Alaska and Hawaii is handled by the local NWS forecasting offices at Fairbanks, Anchorage, and Juneau, Alaska, and Honolulu, Hawaii, respectively.

Are Clocks are usually valid for six to nine hours after release time (extended to 12 hours if necessary unless tropical storms or other unusually stable conditions or slow-moving weather events occur). During), and their purpose is to precede the first report. Storm two hours and the first report of severe hail or wind up to one hour.

SPC watch boxes – hence the approximate clock area is said to be square for aviation purposes – usually north and south, or east and west, or both of a line. The approximate outlines of the sides (standing on the centerline) are described.

(City, state, other miles from y miles to another city, another direction to the state (e.g., 10 miles northeast of Columbia, South Carolina, 15 miles south-southwest of Montgomery, 50 miles from Alabama) Mail on both sides of a line “) Geographic coverage of tornado clocks (averaging 20,000–40,000 square miles [52,000–104,000 km2], which includes parts of one or more states), Vary depending on. And the forward movement of the parent storm system and its associated surface boundaries.


In Canada, Climate and Climate Change Canada issues storm clocks through the Regional Meteorological Service’s offices in Vancouver, Edmonton, Winnipeg, Toronto, Montreal, and Dartmouth. [10] Unlike the clock box/subdivision structure issued by the Storm Prediction Center, tornado clocks issued by the Meteorological Service are strictly issued for census subdivision groups, often over a total area.

Which is relatively smaller than hurricane clocks in the United States). The clocks are made available to the public through broadcast and online media outlets (including local television stations and The Weather Network / MétéoMédia), and Weatheradio Canada. Depending on the discretion of the regional office,

the clock may need to activate the National Public Alert System (Alert Ready) (French: Système National d’alertes à la Population [En Alerte]) and feed the provincial warning system ( Such as Alberta Emergency Alert and SaskAlert to distribute alerts on local broadcast media and cellular phones.

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