Lake Ouachita Thunderstorms

In the afternoon during summer, thunderstorms are likely to occur over
 Lake Ouachita when the humidity and temperature are high.
 
Hot air radiates upward from land surfaces heated by the sun.
Moisture from the lake is absorbed by the warm air, which rises
to begin the formation of thunderheads.

The transition from a small cloud into a turbulent, electrified thunderstorm
can occur in less than 30 minutes.

Staying off Lake Ouachita during stormy periods
is the best prevention from dangers of being struck by lightning.
Listen to NOAA radio for storm reports.
List of NOAA frequencies in Arkansas

The lightning safety community reminds you that there is
 NO safe place to be outside in a thunderstorm.
 
If you absolutely can't get to safety, this section is designed to help
 you lesson the threat of being struck by lightning while outside.
Don't kid yourself--you are NOT safe outside

If you are about to be caught in a Thunderstorm

Make sure everyone aboard is wearing a life jacket.
Secure all loose gear, hatches or ports.
Determine your location and the best course back to shelter.

Once the Storm Hits...

Try to take the first (and heaviest) gusts of wind on the bow, not abeam.
Heading into the wind is the most seaworthy position for most small boats.
 
Approach waves at a 45 degree angle to keep the propeller underwater,
to reduce pounding, and to provide a safer and more comfortable ride.
 
If there is lightning, unplug radios and all electrical equipment.
Stay low. Don't make yourself the tallest target.

 Keep away from metal objects that aren't grounded to the boat's protection system.

If caught out in the open and your hair stands on end,
there is a tingling on your arms or back of your neck,
or you hear buzzing - get down low in a crouching position
 and cover your head with your arms.

LIGHTNING STRIKES!

The best protection against lightning is avoidance.
Lightning is random, unpredictable and very dangerous.
Here are some tips to help you avoid Lightning while on the water!

Head into shore well ahead of the turbulence.
Lightning can lash out for miles in front of a storm,
and it can strike after a storm seems to have passed.
 
Look for tall clouds that have an anvil shaped top, these clouds can be VERY large,
 reaching several miles high and several miles wide.

 Squall lines preceding cold fronts also produce thunderstorms.
 
Thunderstorms generally move in an Easterly direction,
 if you see a storm to the South or Southeast of you, by and large you can rest easy.
 If you see a storm to the West or Northwest of you,
Move for cover.

Lightning Facts

Back

• How far away was the last lightning bolt ?
  Count the seconds between the flash and the bang, and divide by 5, and you have the answer in miles. Sound travels at about a mile in five seconds, so by timing the interval between seeing the lightning and hearing the thunder is a pretty good indicator of how close you were to the strike point. If the flash-to-bang time is 30 seconds or less, the last strike was within 5 miles. And statistically in many storms, the following strike usually strikes about to 3 to 5 miles from the last -meaning you could be next !  Remember, if you can hear thunder, you are close enough to the storm to be struck by lightning. Move at once to a sturdy building or vehicle.

  Back

• If a lightning flash takes only a fraction of a second, how come thunder lasts so long ?
  While we see the flash virtually instantaneously, the beginning and end points might be 5 or more miles separated. Due to the slower speed of sound, it takes differing lengths of time for the shock wave to reach our ears. If the lightning channel was two miles long, and assuming it started directly overhead, it would take at least 10 seconds for the rumbling to stop.
   

• How many people are killed and injured by lightning each year ?
  When people say the chances are the same as being struck by lightning to describe a low probability event, they had better go check their figures. Over 7000 Americans have been killed by lightning in a recent 34 year period. Your chances of being struck by lightning in the U.S. are about 1 in 250,000 and 400,000 in a given year. You can increase your odds, if you would like, by golfing, swimming, boating and just being outside during a thunderstorm. In the U.S. alone each year, between 75 and 150 people are reported killed by lightning with 5 to 30 times that being injured. And these statistics are thought to be underestimates of lightning casualties. It is possible that many lightning victims' cause of death is listed as burns or cardiac problems.

  Back

• What are the leading causes of death by lightning strikes ?
  (1) in open fields or ball fields.
  (2) under trees.
  (3) while boating and fishing.
  (4) near tractors and heavy equipment.
  (5) on golf courses.
  (6) on telephones (but not cellular or cordless ones).
   

• Does it need to be raining for lightning to strike ?
  NO!
  Lightning Bolts can and often do strike as much as ten miles outside of the rain area of the storm. Recent research on lightning deaths finds that most fatalities occur in the period when the storm appears to be ending. A study of Florida lightning strike casualties found that the largest number occurred just as the storm was ending, not during its most intense part.
  For the ten or more minute period after the rain ends, and even after the sun comes out,
   lightning is still a threat.
  A bolt from the blue is more than just a figure of speech. Lightning bolts can on occasion jump 10 or more miles out from a cloud and appear to strike in a region with blue skies overhead.

  Back

• What if you are caught outside in a lightning storm ?
  If you are caught outside in a lightning storm and can’t make the shelter of a car or building, then get away from isolated trees, tall objects and hilltops. Being deep inside a grove of trees is safer than being exposed in the open. Do not be the highest point around. Avoid direct contact with other persons (in a group, don’t hold hands or hug each other!), get into a ditch or shallow depression if possible, crouch down with feet together and with your hands on your knees. Remove metal objects such as belts and golf clubs. And then promise to be more alert to weather signs and not get yourself in such a fix again!
   

• What if you hair stands on end ?
  If you are outside when a thunderstorm is nearby and your hair starts to stand on end, a fishing line literally hangs in the air after casting, or a plastic rain coat suddenly begins lifting into the air, lightning may be about to strike. These phenomena are caused by an extremely high electric field in the atmosphere.
  Seek shelter immediately.
  If caught in the open, crouch down as close to the ground as possible
  without your hands touching the ground

  Back

--------------------------------------------------------------------------------------------------------------------
As of October, 2005
 NOAA Weather
Radio transmitters up and running across Arkansas: 
Back

(1) Mount Ida...162.425 MHz,
(2) Little Rock...162.550 MHz,
(3) Harrison...162.525 MHz,
(4) Yellville...162.500 MHz,
(5) Cherokee Village...162.475 MHz,
(6) Wardell MO...162.525 MHz,
(7) Springdale...162.400 MHz
(8) Fayetteville...162.475 MHz,
(9) Mountain View...162.450 MHz,
(10) Jonesboro...162.550 MHz,
(11) Fort Smith...162.550 MHz,
(12) Russellville... 162.525 MHz,
(13) Morrilton...162.475 MHz,
(14) Russell... 162.400 MHz,
(15) Memphis TN...162.475 MHz,
(16) Mena...162.400 MHz,
(17) Grove OK...162.500 MHz,
(18)Dyersburg TN...162.500 MHz,
(19) Marvell... 162.525 MHz,
(20) Broken Bow OK...162.450 MHz,
(21) Gurdon...162.475 MHz,
(22) Star City...162.400 MHz,
(23) Texarkana...162.550 MHz,
(24) El Dorado...162.525, and
(25) Fountain Hill...162.475 MHz.

Back