Severe Thunderstorms in the Central U.S.; Upper Level Low Over California

Scattered severe thunderstorms are possible today across central and eastern Minnesota, Iowa, and western Wisconsin. A few tornadoes, isolated very large hail, and damaging winds may occur. An upper level low will help trigger scattered thunderstorms over portions of central and southern California today along with a few inches of snow in the central Sierra Nevadas. Read More >

COOP Observations Forms

WS Form B-23: Cooperative Station Inspection (Word version).
WS Form B-91: Record of River and Climatological Observations (Word version).
WS Form B-92: Record of Evaporation and Climatological Observations (Word version).
NWS Cooperative Observer Site - Authorization: Authorization Document for a COOP Observer Site (Word version).
WS Form B-43: Request for Establishment or Change in status of Cooperative Station (Word version).
WS Form B-30: Cooperative Agreement with Observer (Word version).
Surface Observations Forms (All)

TEMPERATURE OBSERVER Instructions for Nimbus MMTS

Nimbus Display Unit Manual - July 2000

PRECIPITATION OBSERVER Reporting Instructions

Fischer-Porter Rebuild (FPR) Gauges

Fischer-Porter Mechanical (F&P) Gauges

Papertape Decoding Instructions, For 79-1D - August 2011
WS Form 79-1D, (XLS file) - August 2011

SNOWFALL OBSERVER Instructions

Snow Measurement Guidelines for NWS Surface Observing Programs - September 2013

PAN EVAPORATION OBSERVER Instructions

Wind Run Observation - NovaLynx Totalizing Anemometer - June 2015

Water Thermometer Note - ThermoWorks Maximum/Minimum Digital - August 2013

TECH SUPPORT HOTLINE - STERLING FIELD SUPPORT CENTER (SFSC)

Hotline Contact Information, October 2012

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Severe Thunderstorms in the Central U.S.; Upper Level Low Over California

Handbooks, Guides, COOP Forms