Related: CWSU Center Weather Advisories Graphical-AIRMETs PIREPs TAFs Temp/Winds Aloft

Backend documentation for those wishing to script against this download portal.

Time Interval for SIGMET Issuance TIme (UTC)
YearMonthDay HourMinute


Shapefile DBF schema:

Field 0: Type=C/String, Title=`NAME' Combination of label and type fields
Field 1: Type=C/String, Title=`LABEL' SIGMET label
Field 2: Type=C/String, Title=`TYPE', One Character SIGMET type
Field 3: Type=C/String, Title=`ISSUE', Issuance UTC Time
Field 4: Type=C/String, Title=`EXPIRE', Expiration UTC Time

Archive / Usage Notes: