The IEM has a database archive of CWSU Center Weather Advisories. The archive presently dates back to 1 January 2014 and is updated in real-time as new products are received and processed. Robust processing of the CWA has been problematic as the raw products are more free-form text than adhering to a format specification. Presently, attempts are not made at processing cancellation statements.

Related: AWC Graphical-AIRMETs PIREPs SIGMETs TAFs Temp/Winds Aloft

The data presented here is beta quality and refinements are being made yet to improve text parsing robustness. This message will be removed once more quality control checks are done to ensure fidelity.

Time Interval for CWA Issuance (UTC)
YearMonthDay HourMinute


Shapefile DBF schema:

Field 0: Type=C/String, Title='CENTER', CWSU Center ID
Field 1: Type=C/String, Title='ISSUE', UTC CWA Issuance Time
Field 2: Type=C/String, Title='EXPIRE', UTC CWA Expiration Time
Field 3: Type=C/String, Title='PROD_ID', IEM Text Product Identifier
Field 4: Type=C/String, Title='NARRATIV', Text Narrative found in raw text
Field 5: Type=N/Double, Title='NUMBER', CWA Number

Archive / Usage Notes: