earth science

Gale warning

Gale warning is a earth science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Gale warning rather than just read about it. In short: A gale warning is an alert issued by national weather forecasting agencies around the world in an event that maritime locations currently or imminently experiencing winds of gale force on the Beaufort scale. Gale warnings (and gale watches) allow mariners to take precautionary actions to ensure their safety at sea or to seek safe anchorage and ride out the storm on land.

Key takeaways

Gale warning belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Gale warning to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Gale warning from memory before moving on to harder problems.

Reference excerpt

A gale warning is an alert issued by national weather forecasting agencies around the world in an event that maritime locations currently or imminently experiencing winds of gale force on the Beaufort scale. Gale warnings (and gale watches) allow mariners to take precautionary actions to ensure their safety at sea or to seek safe anchorage and ride out the storm on land. Though usually associated with deep low-pressure areas, winds strong enough to catalyze a gale warning can occur in other conditions too, including from anticyclones, or high-pressure systems, in the continental interior. The winds are not directly associated with a tropical cyclone.

Usage in the United States

Maritime In the United States, the National Weather Service issues gale warnings for marine areas (oceans, sounds, estuaries, and the Great Lakes) experiencing, or about to experience, winds within the range of 34 knots (63 km/h; 39 mph) to 47 knots (87 km/h; 54 mph). In United States maritime warning flag systems, two red pennants indicate a gale warning; the use of one such flag denotes a small craft advisory. The National Weather Service issues a storm warning for higher winds of 48 knots (89 km/h; 55 mph) to 63 knots (117 km/h; 72 mph) at sea. In the event of a tropical cyclone, however, a tropical storm warning replaces both the gale warning and the storm warning. In this type of situation, the storm warning maritime flag is also used in lieu of the gale warning pennants, regardless of the intensity of the tropical storm.

Land

The National Weather Service issues a similar high wind warning (Specific Area Message Encoding code: HWW) for high winds on land. The criteria vary from place to place; however, in most cases, the warning applies to winds of 40 miles per hour (64 km/h) to 73 miles per hour (117 km/h) for at least 1 hour; or any gusts of 58 miles per hour (93 km/h) to 114 miles per hour (183 km/h) on land. It is more severe than a wind advisory, but not as severe as an extreme wind warning, which is generally issued if major hurricane winds are expected from a tropical cyclone. The high wind warning is not issued if a tropical storm warning, blizzard warning, winter storm warning, severe thunderstorm warning, dust storm warning, or tornado warning covers the phenomenon.

Usage in the United Kingdom In the United Kingdom, the Met Office issues gale warnings, and radio broadcasts them four times a day at fixed times on 198 kHz in the Shipping Forecast, part of the broadcast output of BBC Radio 4. If a considerable time will intervene before the next Shipping Forecast, forecasters may issue an extra gale warning, read between programmes. The Meteorological Office issues warnings for sea areas surrounding the United Kingdom for all predictions of winds of Beaufort scale Force 8 or greater, the forecasts extending as far north as Iceland and as far south as southern Spain. Robert FitzRoy developed the first weather forecasting and storm warning system. On 1 September 1860 weather reports began to be collected at the Meteorological Office in London via electric telegraph and on 5 February 1861 the first storm warning was issued. After his death in 1865 the storm warning service was discontinued due to the ongoing debate about its scientific accuracy but the increased loss of life caused a public outcry and a campaign in press and in parliament saw the restoration of storm warnings in 1867. The service continues to this day and is now known as the iconic Shipping Forecast.

Usage in Ireland Met Éireann, the Republic of Ireland meteorological office, issues an area forecast for the Irish Sea and warnings for sea areas around Ireland with headlands of Ireland (e.g. Fair Head, Malin Head, Mizen Head, Carnsore Point) defining stretches of coast.

Usage in Canada In Canada, the Meteorological Service of Canada branch of the Environment and Climate Change Canada issues a gale warning for lakes, oceans, and other marine areas within the country.

Usage in the Philippines In the Philippines, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) branch of the Department of Science and Technology (DOST) issues gale warnings during weather disturbances (including typhoons) within the Philippine Area of Responsibility (PAR).

Example The following is an example of a Gale Warning issued by the National Weather Service office in North Webster, Indiana.

URGENT - MARINE WEATHER MESSAGE NATIONAL WEATHER SERVICE NORTHERN INDIANA 901 PM EDT WED OCT 29 2014

LMZ043-046-300915- /O.CON.KIWX.GL.W.0014.141031T1200Z-141101T0900Z/ NEW BUFFALO MI TO ST JOSEPH MI-MICHIGAN CITY IN TO NEW BUFFALO MI- 901 PM EDT WED OCT 29 2014

...GALE WARNING REMAINS IN EFFECT FROM 8 AM FRIDAY TO 5 AM EDT SATURDAY...

* WINDS...NORTHWEST 15 TO 25 KNOTS WITH GUSTS TO 30 KNOTS BY DAYBREAK FRIDAY...VEERING NORTH TO 35 KNOT GALES WITH GUSTS TO 45 KNOT GALES FRIDAY. NORTH WINDS DIMINISHING TO 20 TO 30 KNOTS WITH GUSTS TO 35 KNOT GALES LATE FRIDAY NIGHT.

* WAVES..5 TO 8 FEET LATE THURSDAY NIGHT...BUILDING TO 14 TO 20 FEET FRIDAY...SUBSIDING TO 8 TO 12 FEET LATE FRIDAY NIGHT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR OCCURRING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER DETAILS OR UPDATES...OR CHECK OUR WEB SITE AT WEATHER.GOV/IWX/?N=MARINE

See also Severe weather terminology (United States) Small craft advisory Storm warning Tropical cyclone warnings and watches

References

External links Meteorological Service of Canada

Illustrations

Worked examples

Example 1 — a first encounter with Gale warning

Start with the simplest possible case. Write down what Gale warning claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Gale warning before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Gale warning ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Gale warning

In research: Gale warning appears in earth science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Gale warning in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Gale warning is common in secondary-school and first-year university syllabi. It links to neighbouring topics Seas, Weather warnings and advisories, Winds, so understanding it makes those chapters shorter.
In everyday life: Look for Gale warning outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Gale warning in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Gale warning means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Gale warning out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Gale warning in simple terms?

Why does Gale warning matter?

Because it connects several earth science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Gale warning?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Gale warning.