Training & Case Studies

COMET / MetEd

Satellite Applications for Winter Weather: Snow Squalls

CLC

There are two main snow squall lessons on the CLC, both of which are part of WDTD's WOC Winter (be sure to take these on CLC to earn credit): 

1.) Snow Squalls: Meteorological Considerations (reposted with updates, March 2023) - This module covers snow squall fundamentals, including snow squall dynamics, conceptual models, flash freeze, radar limitations, and application of a total observation concept.  

2.) Snow Squall Warnings & Associated Operational Actions (Updated October 2022) - This module highlights actions to take at different forecast time scales, and covers decision making related to SPS/SQW and SQW with and without Wireless Emergency Alert activation. LSR issuance is also covered. 

 

Note: If you were previously enrolled in WOC Winter (fall 2022 or earlier), the module below is still active, but will be removed for the fall 2023 course: WOC Winter 2022: Snow Squall Warnings: Part 1, Meteorological Considerations | Quiz

 

WES

WOC Winter Snow Squall Simulation (WFO CYS from Jan 27-28, 2019. Contact WDTD for discs - nws.wdtd.wocwinter@noaa.gov)

 

ArcGIS StoryMaps 

WFO New York (12/18/2019) | WFO State College (11/11/2020) | WFO Burlington & WFO Gray (2/27/2022)

 

CASE STUDIES & PRESENTATIONS

Please contact a member of our team if you have a presentation from your office you'd like to share in the portlet below. 

Snow Squall Case Studies and Presentations

Policy and Directives

Directive (10-513): WFO WINTER WEATHER PRODUCTS SPECIFICATION

Snow Squall IBW Tags One-Pager. This gives the WFOs better control over WEA notifications. 

Snow Squall IBW Tags Software Timeline

Papers

Banacos, P. C., A. N. Loconto, and G. A. DeVoir, 2014: Snow Squalls: Forecasting and Hazard MitigationJ. Operational Meteor.2(12), 130-151.

Banacos, P.C., G. A. DeVoir, B. Watson, A. N. Loconto, and D. J. Nicosia 2019: R2O: Development of NWS Snow Squall Warnings. Preprints, 9th Conference on the Transition of Research to Operations, Phoenix, AZ. Amer. Meteor. Soc.. 

DeVoir, G., 2004: High impact sub-advisory snow events: The need to effectively communicate the threat of short duration high intensity snowfall. Preprints, 20th Conf. on Weather Analysis and Forecasting/16th Conf. on Numerical Weather Prediction, Seattle, WA, Amer. Meteor. Soc., 10.2. [PDF]

Milrad, S. M., J. R. Gyakum, E. H. Atallah, and J. F. Smith, 2011: A diagnostic examination of the eastern Ontario and western Quebec wintertime convection event of 28 January 2010. Wea. Forecasting, 26, 301–318.

Lukinbeal, A. 2024: Western Montana Snow Squall Climatology and Synoptic Patterns, 2000–2020, J. Operational Meteor., 12 (2), 18-26, doi: https://doi.org/10.15191/nwajom.2024.1202.

Lundstedt, W., 1993: A method to forecast wintertime instability and non-lake effect snow squalls across northern New England. NOAA/NWS Eastern Region Tech. Attach. 93-11A, 7 pp.

Pettegrew, B. P., P. S. Market, R. A. Wolf, R. L. Holle, and N. W. S. Demetriades, 2009: A case study of severe winter convection in the Midwest. Wea. Forecasting, 24, 121–139.

SQW Issuance Statistics

Snow Squall Warning (SQW) counts by WFO (click images to enlarge)

Here's a look at all the Snow Squall Warnings (SQWs) issued by WFO from the start of the demonstration (cool season 2017-2018) through May 31, 2024: 

 

Cool season 2017-18 (Demonstration at 6 WFOs only) 

Cool Season 2018-2019

Cool Season 2019-2020

Cool Season 2020-2021

 

Cool Season 2021-2022

 

Cool Season 2022-2023

 

Cool Season 2023-2024

 

Cool Season 2024-2025

 

 

 

 

 

 

 

Cool Season 2025-2026