Severe Hazards
Analysis &


Operations Plan

Collaborating Projects


Data collection team

Daily activities


Ground surveys

Interactive pages

Submit a storm photo
(Coming soon)

Submit a hail report
(Central OK)


Data (Archived)

Example cases

Damage Surveys

Other information

SHAVE publications
Papers describing the experiment or using SHAVE data
Severe Hazards Analysis & Verification Experiment
NOAA Hazardous Weather Testbed - Experimental Warning Program
***In 2012, SHAVE will expand to verification of winter weather and a special project involving lightning. More info to come!***

The Severe Hazards Analysis and Verification Experiment (SHAVE) is a unique project that blends high-resolution radar data with geographic information. The primary objective of this experiment is to collect high temporal and spatial resolution data that describe the distribution of hail sizes ,wind damage and flash flooding produced by severe thunderstorms. These data will enable several goals, including:

Top: 2 inch hail Middle: Tornado west
of Arnette, OK on 5 May 2007 Bottom: Lightning over Wichita, KS Photos
copyright Kiel Ortega
  1. to provide high-resolution verification data for the National Weather Radar Testbed's multi-purpose phased array radar
  2. to use the high-resolution verification data in the development of techniques for probabilistic warnings of severe thunderstorms,
  3. to evaluate the performance of multi-sensor, multi-radar severe weather algorithms,
  4. to associate changes in hail size and wind damage distributions with storm evolution, and
  5. to enhance climatological information about severe storm threats in the United States.

The high spatial and temporal resolution of the dataset collected during the project will facilitate the development of decision-making tools that improve forecasts and warnings of severe thunderstorms and tornadoes, and pave the way for improvements to the historical severe storms database. The project runs approximately from mid-May through mid-August of every year.

Real-time severe weather analysis tools from the WDSS-II system are used to enhance data collection via verification telephone calls and internet multimedia news sources. The WDSS-II products are available throughout the contiguous 48 states on a daily basis, allowing data collection throughout the summer and minimizing the number of "down days". These remote verification efforts can begin immediately following a storm's passage at any given point.

Data are collected by a team of University of Oklahoma meteorology students working closely with scientists from the NOAA National Severe Storms Laboratory/Cooperative Institute for Mesoscale Meteorological Studies. SHAVE is an experiment being conducted in the NOAA Hazardous Weather Testbed as part of the Experimental Warning Program by the NSSL/CIMMS Severe Weather Warning Applications and Technology Transfer (SWAT) group. SHAVE and
reports for a storm in Lac qui Parle County, MN on 27 July 2006
SHAVE and NWS reports for a storm in Lac qui Parle County, MN on 27 July 2006