1. National Weather Service
Our Nation’s Weather Sentry…
…Always There, Always on Guard
Chris Strong
National Weather Service
Baltimore/Washington Forecast Office
5. National Weather Service
Baltimore MD/Washington DC
Threats
• Hurricane or Remnant, threats are same…
• Flooding from Torrential Rain
• Tidal Flooding from Surge
6. National Weather Service
Baltimore MD/Washington DC
Threats
• Hurricane or Remnant, threats are same…
• Flooding from Torrential Rain
• Tidal Flooding from Surge
• Tornados
7. National Weather Service
Baltimore MD/Washington DC
Threats
• Hurricane or Remnant, threats are same…
• Flooding from Torrential Rain
• Tidal Flooding from Surge
• Tornados
• Winds
8. National Weather Service
Baltimore MD/Washington DC
Threats
• Flooding from Torrential Rain
Probably the most underrated
threat, yet often biggest issue.
1-2 FEET of rain can fall.
(An average rainstorm is <1”)
9. National Weather Service
Baltimore MD/Washington DC
Threats
• Flooding from Torrential Rain
The biggest inland killer
Often from:
– Driving into flooded areas
– Kids playing w/ swollen streams
10. National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
Flooding
12. National Weather Service
Baltimore MD/Washington DC
Threats
• Tidal Flooding from Surge
The most deadly threat for:
* those along tidal shores
* watch track W of Fairfax
Think of surge like a slow tsunami
13. National Weather Service
Baltimore MD/Washington DC
Threats
• Tornados
Many do not realize it, but
hurricanes can produce tornado
outbreaks upon landfall.
Affects targeted areas.
14. National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
Tornadoes
Remnants of Ivan produced the
worst Mid Atlantic tornado outbreak
(35 tornadoes) in recent history
(Sept 17, 2004).
•Tornado production
can occur for days
after landfall
•Any time of day/night
15. National Weather Service
Baltimore MD/Washington DC
Threats
• Winds
Typically one of the biggest
threats near the landfall region
The main threat for mariners.
Wind speeds usually decrease
dramatically after landfall.
Can have wind gusts above 200 mph.
16. National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
National Weather Service
Des Moines, IA
17. National Weather Service
Baltimore MD/Washington DC
4 Threats
• Hurricane or Remnant, threats are same…
• Flooding from Torrential Rain
• Tidal Flooding from Surge
• Tornados
• Winds
Which one(s) will impact you & how bad ?
Depends on:
* storm’s “personality”
* your particular area!
18. National Weather Service
Baltimore MD/Washington DC
4 Threats
• Sandy (2012)
• 3) Flooding from Torrential Rain
• 1) Tidal Flooding from Surge
• Tornados
• 2) Winds
Which one(s) will impact you & how bad ?
Depends on:
* storm’s “personality”
* your particular area!
25. Sandy’s Impacts
Evacuation Orders
• More than 1 Million Evacuation Orders
Implemented
• Decisions for Evacuation are ALL TIED to
Hurricane Category (Wind Speed) in
Emergency Preparedness Plans
26. Sandy’s Impacts
Power Outages
• More than 3 Million Widespread Power
Outages that Lasted at Least 2 Weeks
• Tri-State Area served by at Least 10 Different
Utility Companies
27. Sandy’s Impacts
Property Damage
• Cost Estimates Provided by the Governors for
the States of NY, NJ, and CT
- New York $42 Billion
- New Jersey $29.4 Billion
- Connecticut $360 Million
28. • Main Impacts
– Wind Damage (Trees and Power lines; some
structural damage due to fallen trees)
– Coastal Inundation caused widespread and
significant property damage; NYC/NJ Metro Area
Hardest Hit (including Long Island and CT)
Sandy’s Impacts
Wind and Surge
29. National Weather Service
Baltimore MD/Washington DC
SO….
• Have plans…
– Not just for the 1 in 10 year storm,
– But the 1 in 100 year storm too!
• For each of the 4 threats
Thank you!
Chris Strong
National Weather Service
christopher.strong@noaa.gov
30. Weather-Ready Nation
Weather Disasters will come…
If everyone…
…gets advance notice
…knows what to do & acts
…is prepared
…we will truly be a Weather-Ready Nation!
NOAA National Weather Service