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Lightning Safety Week: Lightning—The Underrated Killer
Second Full Day of Summer Will Feel Like It!
Overview of the Week (my only post this week)
7:10am – For the next 7 days, I will only be able to post today. Therefore, I thought I’d present an overview graphic. Although we start the week off on a hot and humid note as we’ve had lately. We transition into a northwesterly wind flow as a trough sets up over the eastern U.S. This will set up a weather pattern that will allow “cooler” air masses to translate into our region. Thus, look for the lower temperatures and humidities by mid-week.
Welcomed Rains!
7:30am – West TN received some welcomed rains. Here is a look at 24-hour amounts upto 7 am from the CoCoRaHS network of volunteer observers (click to enlarge):
From Bemis/S. Jackson, William Brantley had a whopping 2.42″ as of midnight last night and it was still raining.
Morning weather map showing the front just into NW TN at 4:00am
Appears will keep at least isolated showers and thunderstorms in the forecast for today. The front will begin to wash out by late tonight:
Leaving Sunday, generally dry, although with enough heat and humidity will expect possiblility of an isolated afternoon thunderstorm.
Severe T’storm Watch # 525 Until Midnight
THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 525 IN EFFECT UNTIL MIDNIGHT CDT TONIGHT FOR THE FOLLOWING AREAS
IN WEST TENNESSEE THIS WATCH INCLUDES 9 COUNTIES
CARROLL CROCKETT DYER
GIBSON HENRY LAKE
LAUDERDALE OBION WEAKLEY
SEL5
URGENT – IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 525
NWS STORM PREDICTION CENTER NORMAN OK
530 PM CDT FRI JUN 13 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF
NORTHERN ARKANSAS
EXTREME SOUTHERN ILLINOIS
WESTERN KENTUCKY
SOUTHERN MISSOURI
NORTHERN PART OF WEST TENNESSEE
EFFECTIVE THIS FRIDAY AFTERNOON FROM 530 PM UNTIL MIDNIGHT CDT.
HAIL TO 1.5 INCHES IN DIAMETER…THUNDERSTORM WIND GUSTS TO 70
MPH…AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 55
STATUTE MILES NORTH AND SOUTH OF A LINE FROM 15 MILES SOUTHWEST
OF HARRISON ARKANSAS TO 65 MILES EAST OF PADUCAH KENTUCKY. FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU5).
REMEMBER…A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY
DO PRODUCE TORNADOES.
OTHER WATCH INFORMATION…CONTINUE…WW 522…WW 523…WW 524…
DISCUSSION…BAND OF STRONG/SEVERE STORMS IS EXPECTED TO INTENSIFY
NEXT SEVERAL HOURS AS STRONGER WESTERLY MID LEVEL WINDS SPREAD EWD
ACROSS THE REGION THIS EVENING. AIR MASS IS VERY WARM/MOIST WITH
SURFACE TEMPERATURES IN THE UPPER 80S AND DEW POINTS NEAR
70…CONTRIBUTING TO MLCAPE OF 2000 J/KG. SUFFICIENT DEEP LAYER
SHEAR WILL ENHANCE STORM ORGANIZATION…WITH POTENTIAL FOR EMBEDDED
CONVECTION TO ORGANIZE INTO BOW ECHOES WHICH WOULD RESULT IN AN
ENHANCED WIND DAMAGE THREAT.
AVIATION…A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM
MOTION VECTOR 27030.
…WEISS
Severe Weather Watch May Be Issued Shortly

SPC may be issuing a weather watch for this area soon.
*Slight Risk of Severe Thunderstorms This Evening
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT ACROSS
PARTS OF EASTERN ARKANSAS…THE MISSOURI BOOTHEEL AND WESTERN TENNESSEE.
THE SLIGHT RISK AREA IS GENERALLY ALONG AND NORTH OF THE
MISSISSIPPI AND TENNESSEE STATE LINE. THUNDERSTORMS ARE EXPECTED
TO MOVE INTO THE MID SOUTH AHEAD OF A WEAK COLD FRONT. SOME OF THE
THUNDERSTORMS MAY PRODUCE DAMAGING WINDS AND LARGE HAIL IN THE
SLIGHT RISK AREA. IN ADDITION…LOCALLY HEAVY RAINFALL AND
DANGEROUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE.
- NWS, Memphis, 3:28pm FRI JUN 13 2008
*Slight* Risk of Severe Thunderstorms This Afternoon and Evening

10:35 AM Friday
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING OVER WEST TENNESSEE.
A FEW STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE THIS AFTERNOON
AND EARLY THIS EVENING ACROSS THE ENTIRE MID SOUTH. DAMAGING
WINDS…SMALL HAIL…LOCALLY HEAVY RAIN AND DANGEROUS CLOUD TO
GROUND LIGHTNING ARE ALL POSSIBLE.
THUNDERSTORMS ARE EXPECTED TO MOVE INTO THE MID SOUTH AHEAD OF A WEAK COLD
FRONT. SOME OF THE THUNDERSTORMS MAY PRODUCE DAMAGING WINDS AND
LARGE HAIL IN THE SLIGHT RISK AREA. IN ADDITION…LOCALLY HEAVY
RAINFALL AND DANGEROUS CLOUD TO GROUND LIGHTNING ARE POSSIBLE.
NWS/HOLMES









