Product Description
Abstract: This polygon shapefile, which covers the contiguous United States and surrounding waters, identifies areas of atmospheric turbulence and turbulence severity based on advisories from the National Weather Service Aviation Weather Center. AIRMET turbulence shapefiles are updated hourly.
Purpose: This shapefile can be used to plan flight routes and manage aircraft around atmospheric turbulence threats.
Description: Turbulence AIRMETs identify widespread regions of moderate or greater turbulence at flight levels, or sustained surface winds of 30 knots or more at the surface. DTN decodes and geo-references each AIRMET bulletin from the National Weather Service Aviation Weather Center for use in your GIS. Decoded turbulence information includes severity, flight levels (base and top), extent and valid times. Coverage includes the lower 48 United States and surrounding coastal waters. Use this information to alert flight planners, pilots and operators of all aircraft of regions and airports with potentially dangerous wind conditions.
Product Specification
Shapefile Name: WPXTyymmddhh
Fields. Features in this product have the following attributes:
| Name | Type | Format | Description |
|---|---|---|---|
|
PolygonNum |
Number (10) |
n/a |
Polygon identification number |
|
Latitude |
Number (18) |
decimal degrees |
Recommended location of contour label |
|
Longitude |
Number (18) |
decimal degrees |
Recommended location of contour label |
|
PointNum |
Number (10) |
n/a |
|
|
SevCat |
Number (10) |
n/a |
Coded icing severity category (LIGHT = 2, MODERATE = 3, SEVERE = 4) |
|
StationID |
String (10) |
n/a |
Issuing aviation weather center service unit |
|
AirmetType |
String (10) |
n/a |
AIRMET type (TANGO) |
|
ValidTime |
String (20) |
mm/dd/yyyy hh:mm:ss |
Start or update time of advisory |
|
ExpireTime |
String (20) |
mm/dd/yyyy hh:mm:ss |
End time of advisory |
|
UpdateNum |
Number (3) |
n/a |
Current update number (number of times bulletin has been updated) |
|
MessageID |
Number (3) |
n/a |
Sequential weather center message identifier |
|
TotalPts |
Number (10) |
n/a |
Total number of polygon vertices |
|
MessageTyp |
String (20) |
n/a |
AIRMET type description (TURB) |
|
Severity |
String (20) |
n/a |
Description of turbulence severity category (MODERATE, SEVERE) |
|
LayerNum |
Number (3) |
n/a |
Layer number (if total number layers more than one) |
|
TopLevel |
Number (5) |
ft/100 |
Upper boundary of turbulence (above ground level) |
|
BottomLeve |
Number (10) |
ft/100 |
Lower boundary of turbulence (above ground level) |
|
TotalLayer |
Number (3) |
n/a |
Total number of layers |
|
IceType |
String (10) |
n/a |
Not used |
|
MsgTxt1 |
String (220) |
n/a |
Message body text |
|
MsgTxt2 |
String (220) |
n/a |
Message body text |
|
MsgTxt3 |
String (220) |
n/a |
Message body text |
|
MsgTxt4 |
String (220) |
n/a |
Message body text |
|
MsgTxt5 |
String (220) |
n/a |
Message body text |
|
MsgTxt6 |
String (220) |
n/a |
Message body text |
|
MsgTxt7 |
String (220) |
n/a |
Message body text |
|
MsgTxt8 |
String (220) |
n/a |
Message body text |
|
BulTxt1 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt2 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt3 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt4 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt5 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt6 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt7 |
String (220) |
n/a |
Other bulletin text |
|
BulTxt8 |
String (220) |
n/a |
Other bulletin text |
GeoDatabase Specification
Spatial Table Name: WPXT
Views. The following spatial views are available on this spatial table:
| Microsoft SQL Server | Oracle |
|---|---|
|
WPXT_View FcstAirmetTurb_View |
WPXT_View FcstAirmetTurb_View |
Columns. Features in this spatial table have the following attributes:
| Name | ArcSDE Data Type |
|---|---|
|
ValidTime |
String(20) |
|
ExpireTime |
String(20) |
|
PolygonNum |
Integer |
|
Latitude |
Double |
|
Longitude |
Double |
|
PointNum |
Integer |
|
SevCat |
Integer |
|
StationID |
String(10) |
|
AirmetType |
String(10) |
|
UpdateNum |
Integer |
|
MessageID |
Integer |
|
TotalPts |
Integer |
|
MessageTyp |
String(20) |
|
Severity |
String(20) |
|
LayerNum |
Integer |
|
TopLevel |
Integer |
|
BottomLeve |
Integer |
|
TotalLayer |
Integer |
|
IceType |
String(10) |
|
MsgTxt1 |
String(220) |
|
MsgTxt2 |
String(220) |
|
MsgTxt3 |
String(220) |
|
MsgTxt4 |
String(220) |
|
MsgTxt5 |
String(220) |
|
MsgTxt6 |
String(220) |
|
MsgTxt7 |
String(220) |
|
MsgTxt8 |
String(220) |
|
BulTxt1 |
String(220) |
|
BulTxt2 |
String(220) |
|
BulTxt3 |
String(220) |
|
BulTxt4 |
String(220) |
|
BulTxt5 |
String(220) |
|
BulTxt6 |
String(220) |
|
BulTxt7 |
String(220) |
|
BulTxt8 |
String(220) |