Skip Navigation Linksweather.gov 
NOAA logo - Click to go to the NOAA homepage National Weather Service Forecast Office   NWS logo - Click to go to the NWS homepage
Go to NWS State College, PA Home
 

Local forecast by
"City, ST" or zip code
Severe Weather Awareness Week
Be Prepared and Stay Safe during Severe Weather
tab icon Monday
(March 3rd)
tab icontab icon Tuesday
(March 4th)
tab icontab icon Wednesday
(March 5th)
tab icontab icon Thursday
(March 6th)
tab icontab icon Friday
(March 7th)
tab icon
 
NWS Logo   PEMA Logo   Skywarn Spotter Logo

Today's Topic: River Flooding!

Thursday's Activities:

Click any Topic to Expand or Contract
1. How common is River Flooding,
and when is it most likely to occur?
2. Where/How can I monitor the Flooding or the River Forecasts? (Link)
3. How you can stay safe during Flooding. (Link)
4. Turn Around Don't Drown!Turn Around Don't Drown Logo (Link)

Daily Safety Message:

...PENNSYLVANIA SEVERE WEATHER AWARENESS WEEK...

THIS IS SEVERE WEATHER AWARENESS WEEK IN PENNSYLVANIA. 

NOW IS THE TIME TO PREPARE FOR THE UPCOMING SEVERE WEATHER SEASON.

WE ARE COVERING A DIFFERENT SAFETY TOPIC EACH DAY OF THIS WEEK.
  
OUR SEVERE WEATHER AND WEATHER SAFETY TOPIC FOR TODAY IS...
RIVER FLOODING AND RIVER FLOOD SAFETY. 

PENNSYLVANIA HAS AN EXTENSIVE RIVER SYSTEM THAT IS SCENIC AND 
BEAUTIFUL. MOST OF THE TOWNS AND CITIES WERE FOUNDED ON THE BANKS OF 
A RIVER OR LARGE CREEK. THIS MEANS THAT WHEN RIVER LEVELS 
RISE...MANY PEOPLE WILL BE AFFECTED AT THE SAME TIME. THE RISING 
RIVER WATERS CAN BECOME DESTRUCTIVE...AND EVEN DEADLY. 
SIGNIFICANT...WIDESPREAD RIVER FLOODS HAVE OCCURRED IN PENNSYLVANIA 
ALMOST EVERY YEAR.

WHAT CAUSES RIVER FLOODS?

GENERALLY...RIVER FLOODS HAPPEN DUE TO PROLONGED PERIODS OF
WIDESPREAD HEAVY RAINFALL. 

OUR RIVERS CAN FLOOD ANYTIME OF THE YEAR. IN SPRING AND 
SUMMER...COMPLEXES OF SLOW MOVING THUNDERSTORMS CAN CAUSE THE RIVERS 
TO FLOOD. DURING LATE SUMMER AND FALL...HEAVY RAIN FROM TROPICAL 
STORMS AND HURRICANES ARE THE BIGGEST CAUSE OF RIVER FLOODING. 

SOMETIMES...AN EXTENSIVE SNOW MELT OCCURS AT THE SAME TIME AS HEAVY 
RAIN. THIS IS ESPECIALLY TRUE IN LATE WINTER AND EARLY SPRING WHEN 
THE SNOW PACK OF THE PREVIOUS WINTER MELTS AWAY. THE DESTRUCTIVE 
FLOODING OF JANUARY 1996 WAS ONE SUCH SITUATION WHERE SNOW MELT AND 
HEAVY RAIN COMBINE TO PUSH RIVER LEVELS EVEN HIGHER. 

RIVER FLOODING CAN RESULT IN WIDESPREAD PROPERTY DAMAGE AND MAY 
RESULT IN LOSS OF LIFE. MORE THAN 50 PERCENT OF THE DEATHS 
ASSOCIATED WITH FLOODING ARE AUTOMOBILE RELATED.

WHAT DOES A FLOOD WATCH MEAN?

A FLOOD WATCH MEANS THERE IS POTENTIAL FOR FLOODING TO OCCUR...
NOT THAT RIVER FLOODING IS OCCURRING. A FLOOD WATCH IS TYPICALLY 
ISSUED FOR AN AREA MANY COUNTIES IN SIZE...AND IS USUALLY ISSUED 12 
TO 24 HOURS BEFORE FLOODING IS EXPECTED TO START. WITH THE ADVANCE 
NOTICE OF A WATCH...YOU WILL HAVE MORE TIME TO PREPARE FOR THE 
FLOODING.

WHAT YOU SHOULD DO WHEN A FLOOD WATCH IS ISSUED?

GO ABOUT YOUR NORMAL ACTIVITIES...BUT MAKE PERIODIC CHECKS OF NOAA 
WEATHER RADIO OR OTHER MEDIA OUTLETS FOR UPDATES AND POSSIBLE FLOOD 
WARNINGS. LISTEN FOR RIVER LEVEL FORECASTS FROM THE NATIONAL WEATHER 
SERVICE. GET READY TO MOVE YOUR PERSONAL PROPERTY OUT OF THE AREAS 
THAT ARE KNOWN TO FLOOD. IF YOU LIVE IN THE FLOOD PLAIN...BE 
PREPARED TO EVACUATE IF ORDERED TO DO SO. 

IF YOU LIVE OR WORK IN AN AREA WHICH IS PRONE TO FLOODING... HAVE A 
SAFE EVACUATION ROUTE TO USE IF FLOODING OCCURS. MAKE SURE EVERYONE 
IN YOUR HOME OR OFFICE KNOWS WHERE TO GO IF FLOODING OCCURS. MOVE UP 
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. KEEP A BATTERY OPERATED 
RADIO...AND SEVERAL WORKING FLASHLIGHTS AVAILABLE. TAKE PRECAUTIONS 
TO SECURE YOUR PROPERTY.

WHAT DOES A RIVER FLOOD WARNING MEAN?

A RIVER FLOOD WARNING MEANS THAT RIVER LEVELS WILL EXCEED FLOOD 
STAGE AT CERTAIN POINTS ALONG OUR LARGER RIVERS...LIKE THE 
SUSQUEHANNA AND JUNIATA RIVERS. 

BECAUSE RIVER FLOODS TAKE LONGER TO DEVELOP THAN FLASH FLOODING 
DOES...RIVER FLOODS MAY NOT POSE AS MUCH OF A THREAT TO LIFE...
BUT RIVER FLOODS CAN TAKE A MUCH LARGER TOLL ON PROPERTY AND 
INFRASTRUCTURE.

WHAT SHOULD YOU DO WHEN A RIVER FLOOD WARNING IS ISSUED?

GATHER ALL NECESSARY ITEMS...INCLUDING MEDICINE AND CLOTHING...IN 
THE EVENT THAT YOU CANNOT RETURN HOME FOR SEVERAL DAYS. MAKE 
ARRANGEMENTS TO PROTECT YOUR PROPERTY BY MOVING YOUR VALUABLES TO 
HIGHER GROUND...OR TO AN UPPER LEVEL OF YOUR HOME.

OBEY EVACUATION ORDERS FROM EMERGENCY MANAGEMENT OR LOCAL LAW 
ENFORCEMENT OFFICIALS...AVOIDING ANY ROADS THAT ARE OR MAY BE 
COVERED WITH WATER.

FOR ADDITIONAL INFORMATION ON RIVER FLOODING AND SEVERE WEATHER
CHECK OUT OUR WEB SITE AT:

   weather.gov

OUR WEATHER SAFETY TOPIC FOR FRIDAY WILL BE...
SKYWARN SEVERE WEATHER SPOTTERS.


 
Local Climate, Water & Weather Topics:
Forecasts, Current Hazards, Current Conditions, Water Resources, Radar, Satellite, Climate,
Weather Safety, Wireless/PDAs, Feature Articles,

US Dept of Commerce
NOAA National Weather Service
Central Pennsylvania Weather Forecast Office
328 Innovation Blvd, Suite 330
State College, Pennsylvania 16803
(814)231-2408
Page Author: 
Page Last Modified: 21 February 2014 09:48:13 UTC
Disclaimer
 
Credits
 
Glossary
Privacy Policy
 
About Our Organization
 
Career Opportunities