“Strong Squall Line Strikes Western Oregon and SW Washington” Sunday, March 13 th 2011 Steve Pierce, Vice President Oregon Chapter of the American Meteorological.

Slides:



Advertisements
Similar presentations
Numbers Treasure Hunt Following each question, click on the answer. If correct, the next page will load with a graphic first – these can be used to check.
Advertisements

Repaso: Unidad 2 Lección 2
1 A B C
AGVISE Laboratories %Zone or Grid Samples – Northwood laboratory
AP STUDY SESSION 2.
1
Weather Discussion November 15, November 7 Tipton, Oklahoma tornado rated an EF-4.
Weather Discussion August 11-16, Chaff detected by Jacksonville, FL radar…
Weather Discussion August 23-25, A local hotspot…
& dding ubtracting ractions.
Weather Forecasting This chapter discusses: 1.Various weather forecasting methods, their tools, and forecasting accuracy and skill 2.Images for the forecasting.
Select from the most commonly used minutes below.
Copyright © 2003 Pearson Education, Inc. Slide 1 Computer Systems Organization & Architecture Chapters 8-12 John D. Carpinelli.
Copyright © 2013 Elsevier Inc. All rights reserved.
Copyright © 2011, Elsevier Inc. All rights reserved. Chapter 6 Author: Julia Richards and R. Scott Hawley.
Multiplication X 1 1 x 1 = 1 2 x 1 = 2 3 x 1 = 3 4 x 1 = 4 5 x 1 = 5 6 x 1 = 6 7 x 1 = 7 8 x 1 = 8 9 x 1 = 9 10 x 1 = x 1 = x 1 = 12 X 2 1.
Division ÷ 1 1 ÷ 1 = 1 2 ÷ 1 = 2 3 ÷ 1 = 3 4 ÷ 1 = 4 5 ÷ 1 = 5 6 ÷ 1 = 6 7 ÷ 1 = 7 8 ÷ 1 = 8 9 ÷ 1 = 9 10 ÷ 1 = ÷ 1 = ÷ 1 = 12 ÷ 2 2 ÷ 2 =
ALGEBRA Number Walls
The Oregon Chapter of the American Meteorological Society (AMS) Presents: A Technical Analysis & Recap of the December 2010 Aumsville, Oregon Tornado Thursday,
The High Wind Event of 7 March 2004 in the Piedmont of the Western Carolinas Harry Gerapetritis National Weather Service Greer, SC.
David Burdett May 11, 2004 Package Binding for WS CDL.
CALENDAR.
1 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt BlendsDigraphsShort.
1 1  1 =.
2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt 2 pt 3 pt 4 pt 5 pt 1 pt Time Money AdditionSubtraction.
Around the World AdditionSubtraction MultiplicationDivision AdditionSubtraction MultiplicationDivision.
Welcome to Who Wants to be a Millionaire
Weather Quick Quiz. Beaufort: Force 8 Mean wind speed (knots): 37 Limit of wind speed (knots): Description: Gale Sea State: Very Rough - High.
Chapter 7: Steady-State Errors 1 ©2000, John Wiley & Sons, Inc. Nise/Control Systems Engineering, 3/e Chapter 7 Steady-State Errors.
Student & Work Study Employment Facts & Time Card Training
Break Time Remaining 10:00.
This module: Telling the time
A sample problem. The cash in bank account for J. B. Lindsay Co. at May 31 of the current year indicated a balance of $14, after both the cash receipts.
PP Test Review Sections 6-1 to 6-6
Operating Systems Operating Systems - Winter 2010 Chapter 3 – Input/Output Vrije Universiteit Amsterdam.
Exarte Bezoek aan de Mediacampus Bachelor in de grafische en digitale media April 2014.
Copyright © 2012, Elsevier Inc. All rights Reserved. 1 Chapter 7 Modeling Structure with Blocks.
1 RA III - Regional Training Seminar on CLIMAT&CLIMAT TEMP Reporting Buenos Aires, Argentina, 25 – 27 October 2006 Status of observing programmes in RA.
We are learning how to read the 24 hour clock
Biology 2 Plant Kingdom Identification Test Review.
1..
1 TV Viewing Trends Rivière-du-Loup EM - Diary Updated Spring 2014.
Adding Up In Chunks.
MaK_Full ahead loaded 1 Alarm Page Directory (F11)
Weather Briefing Dangerous Early Season Winter Storm October 29, 2011 Prepared 3pm EDT Saturday, October 29, 2011 Nelson Vaz– Senior Meteorologist NOAA’s.
Artificial Intelligence
New Hope Baptist Church Sunday, January 29, 2012.
Georgetown KY Terra Dague. Temperature Temperature for today is 58.
Subtraction: Adding UP
Click Here to Begin 1. These are cheeks teeth ears eyebrows.
Click Here to Begin. 1. I can ______ well. play soccer sing drive a truck clean a building.
: 3 00.
5 minutes.
1 hi at no doifpi me be go we of at be do go hi if me no of pi we Inorder Traversal Inorder traversal. n Visit the left subtree. n Visit the node. n Visit.
Let’s take a 15 minute break Please be back on time.
Speak Up for Safety Dr. Susan Strauss Harassment & Bullying Consultant November 9, 2012.
Essential Cell Biology
Converting a Fraction to %
Clock will move after 1 minute
famous photographer Ara Guler famous photographer ARA GULER.
& dding ubtracting ractions.
Slide: 1 Version 0.3, 20 January 2004 METEOSAT SECOND GENERATION (MSG) METEOROLOGICAL USE OF THE SEVIRI HIGH-RESOLUTION VISIBLE (HRV) CHANNEL Contact:Jochen.
Physics for Scientists & Engineers, 3rd Edition
Select a time to count down from the clock above
Copyright Tim Morris/St Stephen's School
1.step PMIT start + initial project data input Concept Concept.
3 - 1 Copyright McGraw-Hill/Irwin, 2005 Markets Demand Defined Demand Graphed Changes in Demand Supply Defined Supply Graphed Changes in Supply Equilibrium.
A Climatological Perspective of the 1962 Columbus Day Storm Wolf Read PhD Candidate Forest Science University of British Columbia
Presentation transcript:

“Strong Squall Line Strikes Western Oregon and SW Washington” Sunday, March 13 th 2011 Steve Pierce, Vice President Oregon Chapter of the American Meteorological Society (503)

Facts, Stats & Data * Peak gust reaches 55 mph at the Portland International Airport on Sunday, March 13 th 2011 at 3:32pm PDT as strong post frontal squall line moved through metro area! * Portland’s 55 mph gust is the strongest recorded south / southwest wind gust at the airport since January 16 th 2000 (59 mph) = 11 years! * The barometric pressure at Portland jumped nearly 5 mb (WOW!!!) in about 30 minutes between 3:00pm and 3:30pm PDT, ranking with the likes of October 12 th 1962, November 14 th 1981 and December 12 th 1995! * Conditions were nearly calm again within 15 minutes of the initial burst of wind and rain.

Saturday (3/12/11) morning’s 12z GFS model output for Newport, Oregon suggested that 850mb (roughly 5,000ft elev) winds would be extremely fast along the coast the following afternoon!

Sunday (3/13/11) morning’s 1.33km view of the U of W 12z WRF model forecasted the developing squall line with uncanny accuracy, hours ahead of time. This image is valid at 3pm PDT 3/13/11!

This image is valid at 4pm PDT on Sunday 3/13/11 and suggested that the squall line would move through the valley shortly before 4pm PDT. This image shows the potential for knot (roughly 50-58mph) gusts from Vancouver to Salem.

This image is valid at 5pm PDT and clearly shows the squall line dissipating as it moves into the Cascades.

Portland composite radar imagery valid at 2:09pm Sunday 3/13/11

Portland composite radar imagery valid at 2:42pm Sunday 3/13/11

Portland composite radar imagery valid at 3:13pm Sunday 3/13/11

Portland composite radar imagery valid at 3:44pm Sunday 3/13/11

Infrared satellite picture valid at 3:45pm PDT Sunday 3/13/11

Classic “V” shaped barometric signature, indicating rapid pressure change!

4.6mb pressure rise in about 30 minutes! WOW!

Top Airport Wind Gusts Eugene 58 mph Portland 55 mph Vancouver 55 mph Salem 54 mph Troutdale 44 mph Aurora 41 mph Hillsboro 39 mph Corvallis 39 mph Scappoose 35 mph McMinnville 32 mph Kelso-Longview 32 mph

Damage in Vancouver, WA. Photo Courtesy: Tyler Mode

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2025 SlidePlayer.com. Inc. All rights reserved.