Advanced Precipitation

The Tomorrow.io REST Weather API provides the following information:

Field

Values

(Metric, Imperial)

AvailabilityPremium Feature

ThunderstormProbability

The probability that lightning flash density exceeds 0.1 with units of (100 km^2 / hour).

%

F: [0, +14 days]
I: T I M R
A: WW
S: ∧ ∨ ~
P: -

Free

hailBinary

The binary forecast of precipitation consisting of solid ice that forms inside thunderstorm updrafts

0/1 (boolean value)F: [-48h, +48h]
I: T I M R
A: CA, US
S: ∧ ∨ ~
Advanced Precipitation

lightningFlashRateDensity

The “Lightning Flash Rate Density” product is the total cloud-cloud and cloud-ground instantaneous lightning flashes per unit time per unit area.

Important Note: This product does not explicitly depict discrete lightning strikes, but is based on Numerical Weather Prediction (NWP) parameters and serves as a proxy for where lightning is forecasted to occur by showing flashes per unit time per unit area.

Flashes per square km (km^-2 5-min^-1).

Flashes per square mi (fl mi^2 5-min^-1)

F: [0 hours, +90 hours]
I: T, I, M, R
A: WW
S: ∧ ∨ ~ ⧖
P:-

Lightning
hailProbability%F: [0, +36 hours]
I: T I R
A: WW
S: ∧ ∨ ~
P: -
Nextgen
hailScore0-1F: [0, +36 hours]
I: T I R
A: WW
S: ∧ ∨ ~
P: -
Nextgen
hailSizecmF: [0, +36 hours]
I: T I R
A: WW
S: ∧ ∨ ~
P: -
Nextgen
lightningProbability%F: [0, +36 hours]
I: T I M R
A: WW
S: ∧ ∨ ~
P: -
Nextgen