SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 174
   NWS STORM PREDICTION CENTER NORMAN OK
   430 PM CDT SUN APR 19 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF NORTHERN ALABAMA
          SOUTHERN PORTION OF MIDDLE TENNESSEE
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 430 PM UNTIL
   1000 PM CDT.
   
   HAIL TO 2 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 50
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST
   OF MUSCLE SHOALS ALABAMA TO 70 MILES EAST NORTHEAST OF HUNTSVILLE
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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 171...WW 172...WW 173...
   
   DISCUSSION...STRONG/SEVERE THUNDERSTORMS HAVE DEVELOPED NRN MS AHEAD
   OF UPPER TROUGH.  WITH 50KT OF DEEP LAYER SHEAR AND 7C/KM LAPSE
   RATES...SUFFICIENT INSTABILITY TO SUPPORT SEVERE THUNDERSTORMS
   CONTINUING E/NE ACROSS THE WATCH AREA THIS EVENING. PRIMARY THREAT
   WILL BE LOCAL DAMAGING WINDS AND LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 24035.
   
   
   ...HALES

   SEL4
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 174
   NWS STORM PREDICTION CENTER NORMAN OK
   430 PM CDT SUN APR 19 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          PARTS OF NORTHERN ALABAMA
          SOUTHERN PORTION OF MIDDLE TENNESSEE
   
   EFFECTIVE THIS SUNDAY AFTERNOON AND EVENING FROM 430 PM UNTIL
   1000 PM CDT.
   
   HAIL TO 2 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 50
   STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES NORTHWEST
   OF MUSCLE SHOALS ALABAMA TO 70 MILES EAST NORTHEAST OF HUNTSVILLE
   ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).
   
   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 171...WW 172...WW 173...
   
   DISCUSSION...STRONG/SEVERE THUNDERSTORMS HAVE DEVELOPED NRN MS AHEAD
   OF UPPER TROUGH.  WITH 50KT OF DEEP LAYER SHEAR AND 7C/KM LAPSE
   RATES...SUFFICIENT INSTABILITY TO SUPPORT SEVERE THUNDERSTORMS
   CONTINUING E/NE ACROSS THE WATCH AREA THIS EVENING. PRIMARY THREAT
   WILL BE LOCAL DAMAGING WINDS AND LARGE HAIL.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 24035.
   
   
   ...HALES

   WOUS64 KWNS 192127
   WOU4
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 174
   NWS STORM PREDICTION CENTER NORMAN OK
   430 PM CDT SUN APR 19 2009
   
   SEVERE THUNDERSTORM WATCH 174 IS IN EFFECT UNTIL 1000 PM CDT
   FOR THE FOLLOWING LOCATIONS
   
   ALC033-043-049-059-071-077-079-083-089-095-103-200300-
   /O.NEW.KWNS.SV.A.0174.090419T2130Z-090420T0300Z/
   
   AL 
   .    ALABAMA COUNTIES INCLUDED ARE
   
   COLBERT              CULLMAN             DEKALB              
   FRANKLIN             JACKSON             LAUDERDALE          
   LAWRENCE             LIMESTONE           MADISON             
   MARSHALL             MORGAN              
   
   
   TNC003-015-031-051-055-061-081-099-101-103-117-119-127-135-149-
   177-181-187-200300-
   /O.NEW.KWNS.SV.A.0174.090419T2130Z-090420T0300Z/
   
   TN 
   .    TENNESSEE COUNTIES INCLUDED ARE
   
   BEDFORD              CANNON              COFFEE              
   FRANKLIN             GILES               GRUNDY              
   HICKMAN              LAWRENCE            LEWIS               
   LINCOLN              MARSHALL            MAURY               
   MOORE                PERRY               RUTHERFORD          
   WARREN               WAYNE               WILLIAMSON          
   
   
   ATTN...WFO...HUN...OHX...
   
   
   

   SAW4 
   WW 174 SEVERE TSTM AL TN 192130Z - 200300Z
   AXIS..50 STATUTE MILES NORTH AND SOUTH OF LINE..
   35NW MSL/MUSCLE SHOALS AL/ - 70ENE HSV/HUNTSVILLE AL/
   ..AVIATION COORDS.. 45NM N/S /38NW MSL - 24W GQO/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 450. MEAN STORM MOTION VECTOR 24035.
   
   LAT...LON 35838805 35758563 34318563 34388805
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU4.
   

Watch 174 Status Report Messages:

STATUS REPORT #4 ON WW 174

VALID 200230Z - 200300Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 25 NNW GAD
TO 30 SW CHA.

WW 174 WILL BE ALLOWED TO EXPIRE AT 200300Z. THE STRONGER STORMS
ARE SHIFTING EAST INTO WW 175 AND 176.

..DIAL..04/20/09

ATTN...WFO...HUN...OHX...

&&

STATUS REPORT FOR WS 174 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ALC049-200300-

AL 
.    ALABAMA COUNTIES INCLUDED ARE

DEKALB		     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #3 ON WW 174

VALID 200125Z - 200240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 SSE HSV
TO 25 W CHA.

..DIAL..04/20/09

ATTN...WFO...HUN...OHX...

&&

STATUS REPORT FOR WS 174 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ALC043-049-071-095-200240-

AL 
.    ALABAMA COUNTIES INCLUDED ARE

CULLMAN 	     DEKALB		 JACKSON	     
MARSHALL	     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #2 ON WW 174

VALID 200040Z - 200140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SW HSV TO
25 N HSV TO 30 NW MSL TO 55 ENE MKL TO 25 S BNA TO 45 N HSV TO 30
NW CHA TO 30 W RMG.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 531

..DIAL..04/20/09

ATTN...WFO...HUN...OHX...

&&

STATUS REPORT FOR WS 174 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ALC043-049-071-089-095-103-200140-

AL 
.    ALABAMA COUNTIES INCLUDED ARE

CULLMAN 	     DEKALB		 JACKSON	     
MADISON 	     MARSHALL		 MORGAN 	     
$$


TNC051-055-081-099-101-103-117-119-127-135-181-187-200140-

TN 
.    TENNESSEE COUNTIES INCLUDED ARE

FRANKLIN	     GILES		 HICKMAN	     
LAWRENCE	     LEWIS		 LINCOLN	     
MARSHALL	     MAURY		 MOORE		     
PERRY		     WAYNE		 WILLIAMSON	     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

STATUS REPORT #1 ON WW 174

VALID 192355Z - 200040Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..DIAL..04/19/09

ATTN...WFO...HUN...OHX...

&&

STATUS REPORT FOR WS 174 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ALC033-043-049-059-071-077-079-083-089-095-103-200040-

AL 
.    ALABAMA COUNTIES INCLUDED ARE

COLBERT 	     CULLMAN		 DEKALB 	     
FRANKLIN	     JACKSON		 LAUDERDALE	     
LAWRENCE	     LIMESTONE		 MADISON	     
MARSHALL	     MORGAN		 
$$


TNC003-015-031-051-055-061-081-099-101-103-117-119-127-135-149-
177-181-187-200040-

TN 
.    TENNESSEE COUNTIES INCLUDED ARE

BEDFORD 	     CANNON		 COFFEE 	     
FRANKLIN	     GILES		 GRUNDY 	     
HICKMAN 	     LAWRENCE		 LEWIS		     
LINCOLN 	     MARSHALL		 MAURY		     
MOORE		     PERRY		 RUTHERFORD	     
WARREN		     WAYNE		 WILLIAMSON	     
$$


THE WATCH STATUS MESSAGE IS FOR GUIDANCE PURPOSES ONLY.  PLEASE
REFER TO WATCH COUNTY NOTIFICATION STATEMENTS FOR OFFICIAL
INFORMATION ON COUNTIES...INDEPENDENT CITIES AND MARINE ZONES
CLEARED FROM SEVERE THUNDERSTORM AND TORNADO WATCHES.
$$

Please visit the National Weather Service Interactive Weather Information Network (IWIN) for more information on the warnings.

For each watch, probabilities for particular events inside the watch (listed above in each table) are determined by the issuing forecaster. The "Low" category contains probability values ranging from less than 2% to 20% (F2-F5 tornadoes), less than 5% to 20% (all other probabilities), "Moderate" from 30% to 60%, and "High" from 70% to greater than 95%. High values are bolded and lighter in color to provide awareness of an increased threat for a particular event.