Destination Weather API Developer's Guide

Supported Global Alerts

The table below lists the alerts supported by the HERE Destination Weather API.

Table 1. Support alert types
ID Description
1 Strong Thunderstorms Anticipated – Strong thunderstorms anticipated during the next 24 hours
2 Severe Thunderstorms Anticipated – Severe thunderstorms anticipated during the next 24 hours (supersedes the strong thunderstorm alert)
3 Tornadoes Possible – Conditions are favorable for the formation of tornadoes (supersedes the severe thunderstorm alert)
4 Heavy Rain Anticipated – More than 1 inch of rain in the next 24 hours (and less than 2 inches)
5 Floods Anticipated – More than 2 inches of rain in the next 24 hours
6 Flash Floods Anticipated – More than 1 inch of rain in any 6 hour time period (supersedes Flood Alert and Heavy Rain Alert)
7 High Winds Anticipated – Winds greater than 35 mph
8 Heavy Snow Anticipated – More than 6 inches of snow in a 12-hour period (anytime during the next 24 hours)
9 Blizzard Conditions Anticipated – More than 6 inches of snow anticipated with winds greater than 35 mph
10 Blowing Snow Anticipated – High winds anticipated with fresh snow on the ground (superseded by Blizzard Alert)
11 Freezing Rain Anticipated – Light freezing rain and/or sleet anticipated
12 Ice Storm Anticipated – Heavy freezing rain anticipated along with hazardous driving conditions
13 Snow Advisory – More than 1 inch of snow anticipated during the next 24 hours (and less than 6 inches)
14 Winter Weather Advisory – A mixture of winter-like conditions anticipated
15 Heat Advisory – Comfort indices exceeding 110F
16 Excessive Heat Alert – comfort indices above 115F with dew points above 80F (supersedes heat advisory)
17 Wind Chill Alert – Issued when the wind chill is 20 below zero or lower with a minimum of a 10 mph wind
18 Frost Advisory – Freezing temperatures and light winds (only issued during the Spring and Fall for low latitude/ low elevation locations)
19 Freeze Advisory – A hard freeze anticipated (only issued during the Spring and Fall for low latitude/ low elevation locations)
20 Fog Anticipated – Visibility expected to drop below 1/4 mile
21 Dense Fog Anticipated – Visibility expected to drop below 1/8 mile (superSedes Fog Alert)
22 Smog Anticipated – Low visibilities and warm temperatures
30 Tropical Cyclone Conditions Anticipated – Winds greater than 40 mph with temperatures above 80F and heavy rain
31 Hurricane Conditions Anticipated – Winds greater than 75 mph with temperatures above 80F and heavy rain
32 Small Craft Advisory Anticipated – Winds greater than 25 mph anticipated
33 Gale Warning Anticipated – Winds greater than 35 mph anticipated
34 Winds greater than 35 mph anticipated – Winds greater than 50 mph anticipated
35 Heavy Surf Advisory – Waves over 15 feet high
36 Beach Erosion Advisory – High waves and wind anticipated