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Title:

Use of TCU to Modify U.S. Watches/Warnings – Informational

Submitter:

NOAA

Discussion:

Currently the NWS directive 10-601, regarding Tropical Cyclone Updates (TCU), Section 1.4.2.2 (Issuance Criteria) reads “Issued by NHC and CPHC in lieu of or preceding special advisories to inform users of unexpected changes in tropical cyclone, or post/cancel watches”. The NWS will re-word the NWS directive 10-601, Section 1.4.2.2 to read as follows: "TCUs are issued by NHC and CPHC in lieu of or preceding special advisories to inform users of unexpected changes in tropical cyclones. The TCU may also be used to announce changes to international watches or warnings made by other countries, and to cancel U.S. watches or warnings."

Recommendation:

Forward to IHC and RA-IV as informational.

Action:

Title:

Satellite Ocean Surface Vector Winds Operational Impacts and Requirements

Submitter:

NOAA

Discussion:

A workshop was conducted at TPC in June 2006 to assess the operational utilization and impacts of ocean surface vector winds (OSVW) retrieved by current research satellites, and to establish new NOAA operational requirements for OSVW measurements from future satellites. The workshop established satellite-derived OSWV measurements are an important tool in daily NOAA forecast and warning operations and current and planned satellite missions do not satisfy the new requirements. A workshop report has been completed and widely distributed, and high-level NWS officials have been briefed on the outcomes of the workshop and have acknowledged the needs it expresses. However, NOAA has no plans for an operational OSVW satellite mission that will meet the new requirements or even maintain capabilities provided by current research satellites (primarily the NASA QuikSCAT). Data provided to NOAA by new operational satellites operated by other countries (e.g., the EUMETSAT METOP) will also not meet the

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61st IHC ACTION ITEMS

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