Technical Attachments

Severe Thunderstorm and Heavy Rainfall Potential Continues

A low pressure center tracking across the Great Lakes and its associated cold front extending across the Southern Plains will focus occasional showers and thunderstorms through tonight. A few of these thunderstorms may become severe alongside heavy rainfall that may cause flash flooding; Portions of the Southern Plains would be the greatest threat for these hazards through tonight. Read More >

National Weather Service, Eastern Region Subseries

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Contact Jeff Waldstreicher or Eric Allen of ER SSD for the above papers that are not available in electronic format.

The Eastern Region (ER) Technical Attachment (TA) series began in 1969. Publication numbers were not assigned to TAs until 1971. For consistency across this webpage and associated file naming conventions, the publication year and number are based on the published date. From 1971 through mid-1976, TA numbers were derived from the publication date. When multiple TAs were published on the same date, they were differentiated using letter suffixes (e.g., A, B, C). However, in practice, numbering was not always sequential and sometimes diverged from this format. Beginning in 1998, a new numbering system was introduced in which TAs were assigned sequential numbers starting at 1 for each calendar year. This revised webpage includes publications from 1969 to 1998. The following notes document known discrepancies, caveats, and clarifying information to promote transparency and historical accuracy.

Notes:

TA 2009-01: The original document is too large for weather.gov; a lite version is provided.
TA 91-10A and TA 91-9A: Both were incorrectly labeled with the year “90” (as 90-10A and 90-9A, respectively) on the physical document. The correct designations are 91-10A and 91-9A to match the publication year.
TA 85-15 and TA 85-15A: TA 85-15A is labeled “85-15(1)” in both TA 86-1 and the document itself. The use of “15A” aligns with the naming conventions of the time, even though, as the second publication, it would typically be labeled “15B.” However, since “85-15” is already correctly labeled and historically established, we will retain that designation and assign “15A” to the second document. This approach is not without precedent; for example, in 1987, the designations “87-5” and “87-5A” were used to distinguish two publications from the same date, even though “A” was applied to the second document. Additionally, TA 85-15 is referenced incorrectly as “85-12(2)” in TA 86-1. Both documents will retain the number “15” for consistency with historical usage.
TA 85-4, TA 78-10, and TA 74-6-10: Each has a conflicting publication date between the printed document and TA 86-1. The date printed on the document is considered authoritative.
TA 78-12: References a Technical Attachment numbered “78-14” in its title. This is a Western Region TA and not part of the Eastern Region series.
TA 73-10-9: Missing a publication date on the document itself; the date used is from the annual index of publications.
TA 73-2-5: The document, published in 1973, has a typographical error in the TA number, beginning with “72” instead of the correct “73-2-5.”
TA 70-8-10: Misspells the author’s name as “Alan V. Gustafson.” The correct name is “Allan V. Gustafson.”
TA 70-7-20, TA 70-5-25B, TA 70-4-13, TA 69-5-5B, and TA 69-3-17: These TAs were not listed in TA 86-1 but were located in the original binder and in the annual Technical Attachment index. A scanned copy exists for TA 69-3-17.
TA 69-11-17 and TA 69-9-29: The date at the top of each document and in the 1969 index shows 11-17-69 and 9-29-69, respectively, but the document footer displays 11/18/69 and 10/01/69.
TA 69-5-12A and TA 69-5-12B: These documents are physically stapled together, with TA 69-5-12B (#2) stapled on top of TA 69-5-12A (#1).
TA 69-4-7 and TA 69-4-7B: The TA titled “Satellites and Satellite Data Availability – 1969” is labeled as “69-4-7B” and marked “Technical Attachment #2.” It follows “Digitized Satellite Picture Mosaics” (69-4-7, labeled “Technical Attachment #1”) in the binder. While not listed in TA 86-1, it is present in the 1969 index and is treated here as a separate TA.
TA 70-2: This untitled document has no listed author or date and does not appear in the 1970 index. It will not be submitted to the NOAA Institutional Repository until authenticated.
Missing Document: A TA titled “Some Thoughts on the Use of ATS Data to Improve Short Range Forecasts” is referenced in multiple sources, but the physical document has not yet been located.

Severe Thunderstorm and Heavy Rainfall Potential Continues

Technical Attachments

NOAA TECHNICAL ATTACHMENTS

National Weather Service, Eastern Region Subseries