Presentation is loading. Please wait.

Presentation is loading. Please wait.

The Omaha, Nebraska Flash Flood of 7 August 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational Meteorology, Education.

Published byGideon Hahn Modified over 9 years ago

Similar presentations

Presentation on theme: "The Omaha, Nebraska Flash Flood of 7 August 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational Meteorology, Education."— Presentation transcript:

1 The Omaha, Nebraska Flash Flood of 7 August 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational Meteorology, Education and Training) Boulder, Colorado USA kelsch@comet.ucar.edu

2 The Omaha, Nebraska Flash Flood of 7 August 1999 Rainfall duration: thunderstorms regenerate on quasi-stationary front which is reinforced by cool outflow air (mesohigh) Rainfall intensity: enhanced by strong transport of low level warm, moist air Urbanization increased hydrologic response (more rapid runoff)

3 0600 UTC, 7 August 1999

4 0000 UTC, 7 August 1999

5

6 0500 UTC 7 Aug 1999 0700 UTC 7 Aug 1999

7

8 Aftermath of 7 August 1999 Omaha flash flood

9

10

11 The Omaha, Nebraska Flash Flood of 7 August 1999 Meteorological boundaries act as atmospheric terrain to focus thunderstorms Human engineered drainages can have rapid and severe responses (streams go back to where nature put them)

Download ppt "The Omaha, Nebraska Flash Flood of 7 August 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational Meteorology, Education."

Similar presentations

Anticipating Extreme Hydrologic Events …how real-time data empowers communities and individuals to survive and recover from disasters AMS Corporate Forum.

Anticipating Extreme Hydrologic Events …how real-time data empowers communities and individuals to survive and recover from disasters AMS Corporate Forum.
The Lynmouth Flood 1952.

The Lynmouth Flood 1952.
Orographic Storms in the Southern Europe Heavy precipitating storms resulting from proximity to Mediterranean Sea Fall season particularly dangerous because.

Orographic Storms in the Southern Europe Heavy precipitating storms resulting from proximity to Mediterranean Sea Fall season particularly dangerous because.
Seeder-Feeder Mechanism When topography is too shallow to force a pure orographic cloud, a seeder-feeder mechanism may operate: –Ice crystals produced.

Seeder-Feeder Mechanism When topography is too shallow to force a pure orographic cloud, a seeder-feeder mechanism may operate: –Ice crystals produced.
The U.S. Desert Southwest (and Las Vegas) Flash Floods, 7-11 July 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational.

The U.S. Desert Southwest (and Las Vegas) Flash Floods, 7-11 July 1999 Matthew Kelsch Hydrometeorologist UCAR/COMET ® (Cooperative Program for Operational.
More Thunderstorms. Today Homework in Wind shear More multicellular storms.

More Thunderstorms. Today Homework in Wind shear More multicellular storms.
Precipitation statistics Cumulative probability of events Exceedance probability Return period Depth-Duration-Frequency Analysis.

Precipitation statistics Cumulative probability of events Exceedance probability Return period Depth-Duration-Frequency Analysis.
HYDROLOGY FOR ENGINEERING MANAGEMENT MSc 2001-2002.

HYDROLOGY FOR ENGINEERING MANAGEMENT MSc
Weather Patterns. Air Mass Large body of air Has the properties of the surface where it developed.

Weather Patterns. Air Mass Large body of air Has the properties of the surface where it developed.
Earth’s Weather and Climate

Earth’s Weather and Climate
Flooding is deceptively deadly, especially Flash Flooding.

Flooding is deceptively deadly, especially Flash Flooding.
Air Masses and Fronts Weather. How Do Air Masses Affect Weather? Weather maps show that cities across a large region share the same weather and they also.

Air Masses and Fronts Weather. How Do Air Masses Affect Weather? Weather maps show that cities across a large region share the same weather and they also.
OVERLAPPING SCALES and the ATMOSPHERIC CAUSES OF FLOODS Katherine K. Hirschboeck Laboratory of Tree-ring Research University of Arizona.

OVERLAPPING SCALES and the ATMOSPHERIC CAUSES OF FLOODS Katherine K. Hirschboeck Laboratory of Tree-ring Research University of Arizona.
Develop and use models to explain how relationships between the movement and interactions of air masses, high and low pressure systems, and frontal boundaries.

Develop and use models to explain how relationships between the movement and interactions of air masses, high and low pressure systems, and frontal boundaries.
Fronts and Mid-latitude Cyclones Chapter 9 Meteorology 1010 Professor Bunds Utah Valley University.

Fronts and Mid-latitude Cyclones Chapter 9 Meteorology 1010 Professor Bunds Utah Valley University.
Inclusion of potential vorticity uncertainties into a hydrometeorological forecasting chain: Application to a flash-flood event over Catalonia, Spain A.

Inclusion of potential vorticity uncertainties into a hydrometeorological forecasting chain: Application to a flash-flood event over Catalonia, Spain A.
Flood maps – Modeling a levee break

Flood maps – Modeling a levee break
1 Hydrometeorlogical Disasters Matt Kelsch, Hydrometeorologist & Instructor University Corporation for Atmospheric Research (UCAR) Cooperative Program.

1 Hydrometeorlogical Disasters Matt Kelsch, Hydrometeorologist & Instructor University Corporation for Atmospheric Research (UCAR) Cooperative Program.
Three Types of Precipitation

Three Types of Precipitation
Principles of Flash Flood Development: An Introduction to Hydrometeorology Anthony Phillips GEOG 490/590 Ball State University  Hazards associated with.

Principles of Flash Flood Development: An Introduction to Hydrometeorology Anthony Phillips GEOG 490/590 Ball State University  Hazards associated with.

Similar presentations

Ads by Google