Storm Prediction Center Non-Operational Watch Probability Tables

Severe Thunderstorm Watch 61

 



The weather watch probability tables are a non-operational product currently under
evaluation at the Storm Prediction Center.  For each watch, probabilities for particular
events inside the watch (listed below in each table) are determined by the issuing
forecaster. The "Low" category contains probability values ranging from 0-20%, "Moderate"
from 30-60%, and "High" from 70-100%. 
High values are bolded and lighter in color to
provide awareness of an increased threat for a particular event.   You may provide
feedback on this non-operational product by writing an e-mail to feedback@spc.noaa.gov.

                                                 Tornadoes
Probability of 2 or more tornadoes

Low (10%)

Probability of 1 or more strong (F2-F5) tornadoes

Low (0%)


                                                       Wind
Probability of 10 or more severe wind events

Low (20%)

Probability of 1 or more wind events > 65 knots

Mod (30%)


                                                        Hail
Probability of 10 or more severe hail events

Mod (50%)

Probability of 1 or more hailstones > 2 inches

Mod (40%)