The phrase "areas of warning" is correct and usable in written English.
It can be used to refer to specific locations or topics that indicate potential danger or caution.
Example: "The report highlighted several areas of warning regarding the safety protocols in the laboratory."
Alternatives: "warning zones" or "caution areas".
Forecasters are expected to review the area of warning this morning.
Shortly thereafter, Rananim left the PAGASA area of warning responsibility.
Late on February 27, Ivy entered the area of warning responsibility of the Wellington Regional Specialized Meteorological Center.
Within the National Hurricane Center area of warning responsibility east of 140ºW, Hurricane Kristy was the longest-lasting tropical cyclone of the season.
In one forecast, Kristy was predicted to move into the area of warning responsibility of the Central Pacific Hurricane Center, or west of 140ºW.
On March 3, the typhoon entered the area of warning responsibility of the Philippine Atmospheric, Geophysical and Astronomical Services Administration PAGASAA); the agency gave it the local name "Basyang".
Shortly thereafter, the PAGASA issued its last advisory on the cyclone as the storm moved out of their area of warning responsibility.
Also on that day, Sudal entered the area of warning responsibility of the Philippine Atmospheric, Geophysical and Astronomical Services Administration PAGASAA), which provided the name "Cosme" for local advisories.
On November 27, the Philippine Atmospheric, Geophysical and Astronomical Services Administration classified the system as Super Typhoon "Yoyoy" after the storm entered the agency's area of warning responsibility.
At the time, the MFR area of warning responsibility was from the coast of Africa to 80º E, and the agency primarily used the Dvorak technique to estimate the intensities of tropical cyclones.
