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National Weather Service’s New Storm-Based Warning Initiative Rich Kane

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National Weather Service’s New Storm-Based Warning Initiative Rich Kane Warning Coordination Meteorologist NWS, NOAA Pittsburgh, PA. -Tornado warnings -Severe thunderstorm warnings -Flash Flood and Flood warnings -Special Marine warnings -Extreme Wind warnings. County Warning Area

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Presentation Transcript
slide1

National Weather Service’s

New Storm-Based

Warning Initiative

Rich Kane

Warning Coordination Meteorologist

NWS, NOAA Pittsburgh, PA

-Tornado warnings

-Severe thunderstorm warnings

-Flash Flood and Flood warnings

-Special Marine warnings

-Extreme Wind warnings

slide3

County Warning Area

NWS Pittsburgh

slide4

DEFINITIONS

WATCH

Conditions are favorable for the weather event in/near the watch area .

WARNING

The weather event is imminent or occurring in the warned area.

SEVERE THUNDERSTORM

A storm which produces hail to ¾ of an inch or greater and/or

Wind gusts to 58 mph or greater (NOTE: does not include lightning)

FLASH FLOOD

A flood caused by heavy rain in a short period of time, generally less than 6 hours.

slide5

Tornado -A violently rotating column of air

extending from the base of a thunderstorm and in

contact with the ground

Funnel Cloud -A rotating, funnel-shaped

cloud extending from a thunderstorm base

Downburst - A strong downdraft with an outrush

of damaging wind on or near the ground

Extreme Wind Warning –Imminent or

occurring sustained winds 100 kts (115 MPH) or

greater (tropical systems)

slide6

Radar Image

08/09/07

slide9

Why Storm-Based Warnings?

Previous method

-4 separate counties

warned

-Nearly 2400 mi2

-Almost 310,000

people

As of October 1, 2007

-more specific

-significantly less people

and area warned

-about 70% less area

slide10

Radar Image

08/09/07

slide13

What’s new with a Storm-Based Warning

-Area hatched is described by

the encoded polygon

-Direction of Motion added

slide14

Benefits of Storm-based Warnings – getting ready for the digital

world and advanced dissemination technology

-Looking toward the future…Digital Emergency Alert System (DEAS)

DEAS will employ “datacasting”. This will allow public video

streams, photographs, large files to be distributed to thousands of

locations simultaneously

-Public can receive warning information on a variety of digital devices

…computers

…phones

…PDAs

…TV

…Satellite Radio

slide15

Will there be challenges?

Absolutely!

-Media, EMA, other agencies, and the general public (our partners

and customers) are in a county-based world

-NOAA Weather Radio (NWR), e-mail, alerting systems, pagers

-Multiple warnings in the same county - confusing

-Mobile users – confusing

-Verification – a large challenge!

-Media (TV)

> Warning “bug” graphics are county based

> TV radar displays beginning to overlay

warning polygons

slide16

Tornado Warning

Severe Thunderstorm

Warnings

slide17

Tornado Warnings

Flash Flood Warnings

noaa all hazards support
NOAA All Hazards Support

NWS Meteorological Support

(wind, temperature, precipitation, etc.)

NWS Dispersion Models (HYSPLIT)

(nuclear incident, terrorism,

hazardous materials event, etc)

Radar

Satellite

Radiosonde

Model Forecasts

slide19

NOAA

HYSPLIT

Model

Beaver

Valley

Concentration

1 hr 1200Z –

1800Z

14 Sep 2008

1

4

2

5

3

6

slide20

NOAA

HYSPLIT

Model

Beaver

Valley

Deposition

1 hr 1200Z –

1800Z

14 Sep 2008

1

4

2

5

3

6

slide21

N OAA HYSPLIT

Trajectory output

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