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Service
Assessments
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Historic Derecho, June 29, 2012
Visible satellite image at 5 p.m. Eastern Daylight Time (EDT) June 29, 2012, as the derecho moved across Ohio. National Lightning Data Network (NLDN) Cloud to ground (CG) lightning strikes for the 1-hour period, 4-5 p.m. EDT, are plotted in red. Surface observations are plotted in green. Smaller insets show radar reflectivity images of the derecho during the afternoon and evening.
NWS conducts Service Assessments to evaluate its performance after significant hydrometeorological, oceanographic, or geological events. Assessments may be initiated when one or more of the following criteria are met:
- Major economic impact on a large area or population
- Multiple fatalities or numerous serious injuries
- Extensive national public interest or media coverage
- Unusual level of attention to NWS performance
Assessment teams, composed of experts from within and outside the NWS, evaluate activities before, during, and after events to determine the usefulness of NWS products and services.The team generates a report, which serves as an evaluative tool to identify and share best practices in operations and procedures, and identify and address service deficiencies. The goal of the activity is for the NWS to continuously improve its services to the nation. |
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2010-2012
- Historic Derecho, June 29, 2012
- Hurricane Irene, August 21-30, 2011
- Remnants of Tropical Storm Lee and the Susquehanna River Basin Flooding of September 6-10, 2011
- The Missouri/Souris River Floods of May–August 2011
- Spring 2011 Middle & Lower Mississippi
River Valley Floods
- The Historic Tornadoes of April 2011
- Joplin, Missouri, Tornado, May 22, 2011
- Record Floods of Greater Nashville: Including Flooding in Middle Tennessee and Western Kentucky, May 1-4, 2010
2005-2009
- South Pacific Basin Tsunami,
September 29-30, 2009
- Southeast United States Floods, September 18-23, 2009
- Mount Redoubt Volcanic Eruptions
March-April 2009
- Central United States Flooding of June 2008
- Mother’s Day Weekend Tornado in Oklahoma and Missouri, May 10, 2008
- Super Tuesday Tornadoes: February 5-6, 2008
- Pacific Northwest Storms of December 1-3,
2007
- Tornadoes in Southern Alabama and
Georgia, March 1, 2007
- Rogers,
MN, Tornado Assessment, September 16, 2006
- Hurricane Katrina, August 23-31, 2005
- West Coast Tsunami Warning:
June 14, 2005
2000-2004
- Hurricane Charley, August 9-15, 2004
- Baltimore Inner Harbor Thunderstorm Event: March 6, 2004
- Intense Space Weather Storms,
October 19 – November 07, 2003
- Hurricane Isabel:
September 18-19, 2003
- Southern California
Wildfires: October 20 to November 3, 2003
- Record
Tornado Outbreaks of May 4-10, 2003
- CR Winter Storm January 29-31, 2002
- Super
Typhoon Pongsona: December 8, 2002
- Veterans
Day Weekend Tornado Outbreak, November 2002
- La
Plata, MD, Tornado Outbreak: April
28, 2002
- Tropical
Storm Allison: Heavy Rains and Floods, Texas and
Louisiana: June 2001
- Northern
Idaho and Western Montana Summer 2000 Wildfires
1995-1999
- Hurricane
Floyd Floods of September 1999
- Oklahoma/Southern
Kansas Tornado Outbreak of May 3, 1999
- South
Texas Floods: October 17-22, 1998 (html)
- Spencer, SD, Tornado:
May 30, 1998 (html)
- Southeast
Tornadoes: April 8, 1998
- The
Ice Storm and Flood of January 1998
- Central
Florida Tornado Outbreak: February 22-23, 1998
- Super
Typhoon Paka: December 2-21, 1997 (html)
-
Central Texas Tornado Outbreak: May 27, 1997
- North
Central U.S. Flooding including the Red River of
the North Basin: April 1997
- Ohio
River Valley Flood: March 1997
- Arkansas Tornado Outbreak:
March 1, 1997
- Hurricane
Fran: August 28-September 8, 1996
- Hurricane
Bertha: July 5-14, 1996
- Ft. Smith
and Van Buren: Arkansas, Tornado of April 21, 1996
- Northeast
United States Flooding: January 1996
- Blizzard
of '96: January 6-8, 1996
- Hurricane
Marilyn: September 15-16, 1995
- Heat
Wave of July 1995
1990-1994
1980-1989
1970-1979
1960-1969
1950-1959
 Most
Assessments are PDFs. Download free PDF Reader.
Service Assessments are part
of the NWS Verification Program.
The NWS Office of the Administrator decides whether to perform an assessment. A report is released
when the Assistant
Administrator for Weather Services has approved it.
If an event does not warrant a
service assessment, but a need
exists to document the event's
data, NWS staff may issue a
Post-Storm
Data Acquisition
report. Single hard copies of older Service Assessments reports may be
available, email:
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January 31, 2013
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www.nws.noaa.gov 
