Observed Conditions

Alert Types

Value

Description

Fog

None

Fog reported at an observation site near the selected location.

Thunderstorm

None

Thunderstorm reported at an observation site near the selected location.

Freezing Precip

None

Any type of freezing precipitation is reported at an observation site near the selected location.

Rain

None

Rain reported at an observation site near the selected location.

Snow

None

Snow reported at an observation site near the selected location.

Hail

None

Hail reported at an observation site near the selected location.

Visibility <

Select distance

Visibility of less than the selected value reported at an observation site near the selected location.

Ceiling <

Enter height

Height of the first broken cloud layer reported at an observation site near the selected location.

Wind Chill <

Enter temperature

Wind chill less than the entered value reported at an observation site near the selected location.

Humidity <

Enter humidity in percentage

Humidity less than the entered value reported at an observation site near the selected location.

Humidity >

Enter humidity in percentage

Humidity greater than the entered value reported at an observation site near the selected location.

Heat Index >

Enter temperature

Heat Index greater than the entered value reported at an observation site near the selected location.

Temp <

Enter temperature

Temperature less than the entered value reported at an observation site near the selected location.

Temp >

Enter temperature

Temperature greater than the entered value reported at an observation site near the selected location.

Wind Speed >

Enter wind speed

Wind Speed greater than the entered value reported at an observation site near the selected location.

Pavement/Runway Temperature <

Enter temperature

Temperature less than the entered value reported at an RWIS site at the selected location. Available in the Pavement Forecast and Airport Operations Editions.

Precip and Pavement/Runway Temp<=34°F (1°C) at two RWIS

None

Pavement forecast must be associated with an RWIS. At least two RWIS in the area must provide the same weather conditions before an alert will be generated. Available in the Pavement Forecast and Airport Operations Editions.