Weather Central DataCloud API

Unit Explanations

The parameter units in the point request can be set to english, metric, or raw. Here is a lookup list of what units and precision those values will return.

English units

FORECAST VARIABLES

Temperature
Fahrenheit rounded to the nearest degree

Feels Like
Fahrenheit rounded to the nearest degree

Dewpoint
Fahrenheit rounded to the nearest degree

Relative Humidity
percentage rounded to the nearest 1% (0-100%)

Wind_Direction (10m, 60m, 120m)
Degrees rounded to the nearest degree (0-359) North is 0, East is 90, South is 180, and West is 270

Wind_Speed (10m, 60m, 120m)
Miles per hour rounded to the nearest mph

Wind_Gust
Miles per hour rounded to the nearest mph

Clouds
This is a derived value based on the overall cloudiness of a location by taking various relative humidity samples throughout the atmospheric column.

0-5 Clear
5-20 Mostly Clear
20-70 Partly Cloudy
70-90 Mostly Cloudy
>90 Cloudy

Accumulated Rain
Inches rounded to the nearest hundredth of an inch

Accumulated Snow
Inches rounded to the nearest tenth of an inch

Accumulated Ice
Inches rounded to the nearest hundredth of an inch

Supercell Index
1-100 index rounded to the nearest digit

Traffic Index 1-100 index rounded to the nearest digit

High Clouds
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds1
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds2
percentage rounded to the nearest 1% (0-100%)

Low Clouds
percentage rounded to the nearest 1% (0-100%)

Probability of Precipitation
percentage rounded to the nearest 1% (0-100%)

RADAR VARIABLES

Precip Type


PrecipType Value

Precipitation Type

0

No Precip

1

Rain

2

Mixed Precipitation

5

Snow

3 and 4

Reserved for Later Use

Reflectivity
decibels rounded to the nearest digit


DBZ

Precipitation Intensity

0-10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Level2 Reflectivity
decibels rounded to the nearest digit


DBZ

Precipitation Intensity

Less than 10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Hailvision
Inches rounded to the nearest hundredth of an inch

Rainvision
Inches rounded to the nearest hundredth of an inch

Snowvision
Inches rounded to the nearest hundredth of an inch

Icevision
Inches rounded to the nearest hundredth of an inch

 

METRIC UNITS

FORECAST VARIABLES

Temperature
Celsius rounded to the nearest tenth of a degree

Feels Like
Celsius rounded to the nearest tenth of a degree

Dewpoint
Celsius rounded to the nearest tenth of a degree

Relative Humidity
percentage rounded to the nearest 1% (0-100%)

Wind_Direction (10m, 60m, 120m)
Degrees rounded to the nearest degree (0-359) North is 0, East is 90, South is 180, and West is 270

Wind_Speed (10m, 60m, 120m)
meters per second rounded to the nearest m/s

Wind_Gust
meters per second rounded to the nearest m/s

Clouds
This is a derived value based on the overall cloudiness of a location by taking various relative humidity samples throughout the atmospheric column.


0-5

Clear

5-20

Mostly Clear

20-70

Partly Cloudy

70-90

Mostly Cloudy

>90

Cloudy

Accumulated Rain
millimeters rounded to the nearest mm

Accumulated Snow
centimeters rounded to the nearest cm

Accumulated Ice
millimeters rounded to the nearest mm

Supercell Index
1-100 index rounded to the nearest digit

Traffic Index
1-100 index rounded to the nearest digit

High Clouds
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds1
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds2
percentage rounded to the nearest 1% (0-100%)

Low Clouds
percentage rounded to the nearest 1% (0-100%)

Probability of Precipitation
percentage rounded to the nearest 1% (0-100%)

RADAR VARIABLES

Precip Type



PrecipType Value

Precipitation Type

0

No Precip

1

Rain

2

Mixed Precipitation

5

Snow

3 and 4

Reserved for Later Use

Reflectivity
decibels rounded to the nearest digit



DBZ

Precipitation Intensity

0-10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Level2 Reflectivity
decibels rounded to the nearest digit



DBZ

Precipitation Intensity

Less than 10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Hailvision
millimeters rounded to the nearest digit

Rainvision
millimeters rounded to the nearest digit

Snowvision
millimeters rounded to the nearest digit

Icevision
millimeters rounded to the nearest digit


 



METRIC ALTERNATIVE1 UNITS

FORECAST VARIABLES

Temperature
Celsius rounded to the nearest tenth of a degree

Feels Like
Celsius rounded to the nearest tenth of a degree

Dewpoint
Celsius rounded to the nearest tenth of a degree

Relative Humidity
percentage rounded to the nearest 1% (0-100%)

Wind_Direction (10m, 60m, 120m)
Degrees rounded to the nearest degree (0-359) North is 0, East is 90, South is 180, and West is 270

Wind_Speed (10m, 60m, 120m)
kilometers per hour rounded to the nearest km/h

Wind_Gust
kilometers per hour rounded to the nearest km/h

Clouds
This is a derived value based on the overall cloudiness of a location by taking various relative humidity samples throughout the atmospheric column.

0-5

Clear

5-20

Mostly Clear

20-70

Partly Cloudy

70-90

Mostly Cloudy

>90

Cloudy

Accumulated Rain
millimeters rounded to the nearest mm

Accumulated Snow
centimeters rounded to the nearest cm

Accumulated Ice
millimeters rounded to the nearest mm

Supercell Index
1-100 index rounded to the nearest digit

Traffic Index
1-100 index rounded to the nearest digit

High Clouds
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds1
percentage rounded to the nearest 1% (0-100%)

Mid Level Clouds2
percentage rounded to the nearest 1% (0-100%)

Low Clouds
percentage rounded to the nearest 1% (0-100%)

Probability of Precipitation
percentage rounded to the nearest 1% (0-100%)

RADAR VARIABLES

Precip Type



PrecipType Value

Precipitation Type

0

No Precip

1

Rain

2

Mixed Precipitation

5

Snow

3 and 4

Reserved for Later Use

Reflectivity
decibels rounded to the nearest digit



DBZ

Precipitation Intensity

0-10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Level2 Reflectivity
decibels rounded to the nearest digit



DBZ

Precipitation Intensity

Less than 10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Hailvision
millimeters rounded to the nearest digit

Rainvision
millimeters rounded to the nearest digit

Snowvision
millimeters rounded to the nearest digit

Icevision
millimeters rounded to the nearest digit



Raw units

FORECAST VARIABLES

Temperature
Kelvin rounded to the nearest thousandth of a degree

Feels Like
Kelvin rounded to the nearest thousandth of a degree

Dewpoint
Kelvin rounded to the nearest thousandth of a degree

Relative Humidity
percentage rounded to the nearest hundredth of a percent (0-100%)

Wind_Direction (10m, 60m, 120m)
Radians rounded to the thousandth (0-2pi)

Wind_Speed (10m, 60m, 120m)
meters per second rounded to the nearest thousandth m/s

Wind_Gust
meters per second rounded to the nearest thousandth m/s

Clouds
This is a derived value based on the overall cloudiness of a location by taking various relative humidity samples throughout the atmospheric column.

0-5 Clear
5-20 Mostly Clear
20-70 Partly Cloudy
70-90 Mostly Cloudy
>90 Cloudy

Accumulated Rain
Inches rounded to the nearest thousandth of an inch

Accumulated Snow
Inches rounded to the nearest thousandth of an inch

Accumulated Ice
Inches rounded to the nearest thousandth of an inch

Supercell Index
1-100 index rounded to the nearest digit

Traffic Index
1-100 index rounded to the nearest digit

High Clouds
percentage rounded to the nearest hundredth of a 1% (0-100%)

Mid Level Clouds1
percentage rounded to the nearest hundredth of a 1% (0-100%)

Mid Level Clouds2
percentage rounded to the nearest hundredth of a 1% (0-100%)

Low Clouds
percentage rounded to the nearest hundredth of a 1% (0-100%)

Probability of Precipitation
percentage rounded to the thousandth of a percent (0-100%)

RADAR VARIABLES

Precip Type


PrecipType Value

Precipitation Type

0

No Precip

1

Rain

2

Mixed Precipitation

5

Snow

3 and 4

Reserved for Later Use

Reflectivity
decibels rounded to the nearest thousandth of a digit


DBZ

Precipitation Intensity

0-10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Level2 Reflectivity
decibels rounded to the nearest thousandth of a digit


DBZ

Precipitation Intensity

Less than 10

No Precipitation or Drizzle

10-25

Light Precipitation

25-40

Moderate Precipitation

40+

Heavy Precipitation

Hailvision
millimeters rounded to the nearest hundredth of a millimeter

Rainvision
millimeters rounded to the nearest hundredth of a millimeter

Snowvision
millimeters rounded to the nearest hundredth of a millimeter

Icevision
millimeters rounded to the nearest hundredth of a millimeter