SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 257
   NWS STORM PREDICTION CENTER NORMAN OK
   555 PM CDT SAT APR 30 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHWEST ARKANSAS
          SOUTHEAST OKLAHOMA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 555 PM
   UNTIL 200 AM CDT.
   
   TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 10 MILES SOUTHWEST OF TYLER
   TEXAS TO 25 MILES NORTH NORTHWEST OF DE QUEEN ARKANSAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU7).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...INCIPIENT STORM DEVELOPMENT IS UNDERWAY ALONG COLD
   FRONT OVER THE DALLAS-FT. WORTH AREA WITHIN A STRONGLY UNSTABLE AIR
   MASS WITH MLCAPE VALUES OF 3000 J/KG. KINEMATIC ENVIRONMENT INVOF
   COLD FRONT IS CHARACTERIZED BY A WEAK LOW-LEVEL WIND FIELD BUT 40-50
   KT EFFECTIVE BULK SHEAR.  HOWEVER...AS STORMS MATURE...THEY WILL
   ENCOUNTER STRONGER LOW-LEVEL SHEAR AND HIGHER BOUNDARY LAYER
   MOISTURE CONTENT WITH EWD EXTENT.  AS SUCH...INITIAL HAZARDS WILL BE
   LARGE HAIL AND LOCALLY DAMAGING WINDS WITH AN INCREASED TORNADO
   THREAT AFTER 01/00Z.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 24030.
   
   
   ...MEAD

   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 257
   NWS STORM PREDICTION CENTER NORMAN OK
   555 PM CDT SAT APR 30 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHWEST ARKANSAS
          SOUTHEAST OKLAHOMA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 555 PM
   UNTIL 200 AM CDT.
   
   SEVERAL TORNADOES
   WIDELY SCATTERED DAMAGING WINDS
   ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
   SCATTERED LARGE HAIL
   ISOLATED HAIL TO 2.5 INCHES IN DIAMETER POSSIBLE
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 10 MILES SOUTHWEST OF TYLER
   TEXAS TO 25 MILES NORTH NORTHWEST OF DE QUEEN ARKANSAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU7).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...INCIPIENT STORM DEVELOPMENT IS UNDERWAY ALONG COLD
   FRONT OVER THE DALLAS-FT. WORTH AREA WITHIN A STRONGLY UNSTABLE AIR
   MASS WITH MLCAPE VALUES OF 3000 J/KG. KINEMATIC ENVIRONMENT INVOF
   COLD FRONT IS CHARACTERIZED BY A WEAK LOW-LEVEL WIND FIELD BUT 40-50
   KT EFFECTIVE BULK SHEAR.  HOWEVER...AS STORMS MATURE...THEY WILL
   ENCOUNTER STRONGER LOW-LEVEL SHEAR AND HIGHER BOUNDARY LAYER
   MOISTURE CONTENT WITH EWD EXTENT.  AS SUCH...INITIAL HAZARDS WILL BE
   LARGE HAIL AND LOCALLY DAMAGING WINDS WITH AN INCREASED TORNADO
   THREAT AFTER 01/00Z.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 24030.
   
   
   ...MEAD

   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH NUMBER 257
   NWS STORM PREDICTION CENTER NORMAN OK
   555 PM CDT SAT APR 30 2011
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   TORNADO WATCH FOR PORTIONS OF 
   
          SOUTHWEST ARKANSAS
          SOUTHEAST OKLAHOMA
          NORTHEAST TEXAS
   
   EFFECTIVE THIS SATURDAY AFTERNOON AND SUNDAY MORNING FROM 555 PM
   UNTIL 200 AM CDT.
   
   TORNADOES...HAIL TO 2.5 INCHES IN DIAMETER...THUNDERSTORM WIND
   GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
   AREAS.
   
   THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE
   MILES EAST AND WEST OF A LINE FROM 10 MILES SOUTHWEST OF TYLER
   TEXAS TO 25 MILES NORTH NORTHWEST OF DE QUEEN ARKANSAS.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
   UPDATE (WOUS64 KWNS WOU7).
   
   REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
   TORNADOES AND 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.
   
   DISCUSSION...INCIPIENT STORM DEVELOPMENT IS UNDERWAY ALONG COLD
   FRONT OVER THE DALLAS-FT. WORTH AREA WITHIN A STRONGLY UNSTABLE AIR
   MASS WITH MLCAPE VALUES OF 3000 J/KG. KINEMATIC ENVIRONMENT INVOF
   COLD FRONT IS CHARACTERIZED BY A WEAK LOW-LEVEL WIND FIELD BUT 40-50
   KT EFFECTIVE BULK SHEAR.  HOWEVER...AS STORMS MATURE...THEY WILL
   ENCOUNTER STRONGER LOW-LEVEL SHEAR AND HIGHER BOUNDARY LAYER
   MOISTURE CONTENT WITH EWD EXTENT.  AS SUCH...INITIAL HAZARDS WILL BE
   LARGE HAIL AND LOCALLY DAMAGING WINDS WITH AN INCREASED TORNADO
   THREAT AFTER 01/00Z.
   
   AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
   SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE
   WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
   500. MEAN STORM MOTION VECTOR 24030.
   
   
   ...MEAD

   WOUS64 KWNS 302252
   WOU7
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   TORNADO WATCH OUTLINE UPDATE FOR WT 257
   NWS STORM PREDICTION CENTER NORMAN OK
   555 PM CDT SAT APR 30 2011
   
   TORNADO WATCH 257 IS IN EFFECT UNTIL 200 AM CDT FOR THE
    FOLLOWING LOCATIONS
   
   ARC057-061-081-091-133-010700-
   /O.NEW.KWNS.TO.A.0257.110430T2255Z-110501T0700Z/
   
   AR 
   .    ARKANSAS COUNTIES INCLUDED ARE
   
   HEMPSTEAD            HOWARD              LITTLE RIVER        
   MILLER               SEVIER              
   
   
   OKC023-089-127-010700-
   /O.NEW.KWNS.TO.A.0257.110430T2255Z-110501T0700Z/
   
   OK 
   .    OKLAHOMA COUNTIES INCLUDED ARE
   
   CHOCTAW              MCCURTAIN           PUSHMATAHA          
   
   
   TXC037-063-067-119-147-159-183-203-213-223-231-257-277-315-343-
   379-387-397-423-449-459-467-499-010700-
   /O.NEW.KWNS.TO.A.0257.110430T2255Z-110501T0700Z/
   
   TX 
   .    TEXAS COUNTIES INCLUDED ARE
   
   BOWIE                CAMP                CASS                
   DELTA                FANNIN              FRANKLIN            
   GREGG                HARRISON            HENDERSON           
   HOPKINS              HUNT                KAUFMAN             
   LAMAR                MARION              MORRIS              
   RAINS                RED RIVER           ROCKWALL            
   SMITH                TITUS               UPSHUR              
   VAN ZANDT            WOOD                
   
   
   ATTN...WFO...SHV...FWD...TSA...
   
   
   

   SAW7 
   WW 257 TORNADO AR OK TX 302255Z - 010700Z
   AXIS..70 STATUTE MILES EAST AND WEST OF LINE..
   10SW TYR/TYLER TX/ - 25NNW DEQ/DE QUEEN AR/
   ..AVIATION COORDS.. 60NM E/W /40WSW GGG - 58NNW TXK/
   HAIL SURFACE AND ALOFT..2.5 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 24030.
   
   LAT...LON 32249672 34389580 34389333 32249431
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU7.
   

Watch 257 Status Report Messages:

STATUS REPORT #7 ON WW 257

VALID 010635Z - 010700Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SSE TYR
TO 35 SSE PRX TO DEQ TO 40 NE DEQ.

WW 257 MAY BE ALLOWED TO EXPIRE AT 010700Z.

FOR ADDITIONAL INFORMATION SEE SPC MESOSCALE DISCUSSION 677.

..EDWARDS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010700-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC089-010700-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

MCCURTAIN	     
$$


TXC037-063-067-159-183-203-315-343-387-423-449-459-499-010700-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
FRANKLIN	     GREGG		 HARRISON	     
MARION		     MORRIS		 RED RIVER	     
SMITH		     TITUS		 UPSHUR 	     
WOOD		     
$$


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 #6 ON WW 257

VALID 010535Z - 010640Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 5 S TYR TO
30 N TYR TO 30 SSE PRX TO 20 ESE PRX TO 30 SW DEQ TO 30 NE DEQ.

FOR ADDITIONAL INFORMATION SEE SPC MESOSCALE DISCUSSION 675.

..EDWARDS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010640-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC089-010640-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

MCCURTAIN	     
$$


TXC037-063-067-159-183-203-315-343-387-423-449-459-499-010640-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
FRANKLIN	     GREGG		 HARRISON	     
MARION		     MORRIS		 RED RIVER	     
SMITH		     TITUS		 UPSHUR 	     
WOOD		     
$$


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 #5 ON WW 257

VALID 010445Z - 010540Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SW TYR TO
15 ESE PRX TO 25 NNE DEQ.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 675.

..PETERS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010540-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC089-010540-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

MCCURTAIN	     
$$


TXC037-063-067-159-183-203-315-343-387-423-449-459-499-010540-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
FRANKLIN	     GREGG		 HARRISON	     
MARION		     MORRIS		 RED RIVER	     
SMITH		     TITUS		 UPSHUR 	     
WOOD		     
$$


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 #4 ON WW 257

VALID 010340Z - 010440Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SW TYR TO
15 ESE PRX TO 25 NNE DEQ.

..PETERS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010440-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC089-010440-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

MCCURTAIN	     
$$


TXC037-063-067-159-183-203-315-343-387-423-449-459-499-010440-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
FRANKLIN	     GREGG		 HARRISON	     
MARION		     MORRIS		 RED RIVER	     
SMITH		     TITUS		 UPSHUR 	     
WOOD		     
$$


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 257

VALID 010235Z - 010340Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 10 SW TYR TO
15 ESE PRX TO 25 NNE DEQ.

FOR ADDITIONAL INFORMATION SEE MESOSCALE DISCUSSION 674.

..PETERS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010340-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC089-010340-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

MCCURTAIN	     
$$


TXC037-063-067-159-183-203-315-343-387-423-449-459-499-010340-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
FRANKLIN	     GREGG		 HARRISON	     
MARION		     MORRIS		 RED RIVER	     
SMITH		     TITUS		 UPSHUR 	     
WOOD		     
$$


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 257

VALID 010125Z - 010240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 SSE DUA
TO 45 WNW DEQ.

..GRAMS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010240-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC023-089-127-010240-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

CHOCTAW 	     MCCURTAIN		 PUSHMATAHA	     
$$


TXC037-063-067-119-147-159-183-203-213-223-231-257-277-315-343-
379-387-397-423-449-459-467-499-010240-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
DELTA		     FANNIN		 FRANKLIN	     
GREGG		     HARRISON		 HENDERSON	     
HOPKINS 	     HUNT		 KAUFMAN	     
LAMAR		     MARION		 MORRIS 	     
RAINS		     RED RIVER		 ROCKWALL	     
SMITH		     TITUS		 UPSHUR 	     
VAN ZANDT	     WOOD		 
$$


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 257

VALID 010030Z - 010140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 20 ESE DUA
TO 40 SSE MLC.

..GRAMS..05/01/11

ATTN...WFO...SHV...TSA...FWD...

&&

STATUS REPORT FOR WT 257 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

ARC057-061-081-091-133-010140-

AR 
.    ARKANSAS COUNTIES INCLUDED ARE

HEMPSTEAD	     HOWARD		 LITTLE RIVER	     
MILLER		     SEVIER		 
$$


OKC023-089-127-010140-

OK 
.    OKLAHOMA COUNTIES INCLUDED ARE

CHOCTAW 	     MCCURTAIN		 PUSHMATAHA	     
$$


TXC037-063-067-119-147-159-183-203-213-223-231-257-277-315-343-
379-387-397-423-449-459-467-499-010140-

TX 
.    TEXAS COUNTIES INCLUDED ARE

BOWIE		     CAMP		 CASS		     
DELTA		     FANNIN		 FRANKLIN	     
GREGG		     HARRISON		 HENDERSON	     
HOPKINS 	     HUNT		 KAUFMAN	     
LAMAR		     MARION		 MORRIS 	     
RAINS		     RED RIVER		 ROCKWALL	     
SMITH		     TITUS		 UPSHUR 	     
VAN ZANDT	     WOOD		 
$$


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.