SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 557
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM MDT MON JUL 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEASTERN MONTANA
          NORTHEASTERN WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
   1000 PM MDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES EITHER SIDE OF A LINE FROM 60 MILES SOUTH OF
   GILLETTE WYOMING TO 30 MILES NORTH NORTHEAST OF MILES CITY
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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 553...WW 554...WW
   555...WW 556...
   
   DISCUSSION...LINE OF DEVELOPING STORMS...ASSOCIATED WITH AN UPPER
   LEVEL IMPULSE...IS EXPECTED TO MOVE ENEWD AT 35 KT THROUGH PORTIONS
   OF SERN MT/NERN WY DURING THE EVENING HOURS. A WARM FRONT WAS
   LOCATED NEAR THE WY/MT BORDER...WITH ELY BOUNDARY LAYER WINDS AND
   MODERATE INSTABILITY FAVORABLE FOR A FORWARD-PROPAGATING MCS ACROSS
   SERN MT. DESPITE WEAKER DEEP LAYER SHEAR IN NERN WY...THE ORGANIZED
   OUTFLOW AND 25-30 DEGREE TEMPERATURE/DEWPOINT SPREADS WILL ALSO
   SUPPORT STRONG TO SEVERE WIND GUSTS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...IMY

   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 557
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM MDT MON JUL 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEASTERN MONTANA
          NORTHEASTERN WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
   1000 PM MDT.
   
   WIDELY SCATTERED DAMAGING WINDS
   ISOLATED WIND GUSTS TO 80 MPH POSSIBLE
   WIDELY SCATTERED LARGE HAIL TO 2.0 INCHES IN DIAMETER
   ISOLATED TORNADOES
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES EITHER SIDE OF A LINE FROM 60 MILES SOUTH OF
   GILLETTE WYOMING TO 30 MILES NORTH NORTHEAST OF MILES CITY
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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 553...WW 554...WW
   555...WW 556...
   
   DISCUSSION...LINE OF DEVELOPING STORMS...ASSOCIATED WITH AN UPPER
   LEVEL IMPULSE...IS EXPECTED TO MOVE ENEWD AT 35 KT THROUGH PORTIONS
   OF SERN MT/NERN WY DURING THE EVENING HOURS. A WARM FRONT WAS
   LOCATED NEAR THE WY/MT BORDER...WITH ELY BOUNDARY LAYER WINDS AND
   MODERATE INSTABILITY FAVORABLE FOR A FORWARD-PROPAGATING MCS ACROSS
   SERN MT. DESPITE WEAKER DEEP LAYER SHEAR IN NERN WY...THE ORGANIZED
   OUTFLOW AND 25-30 DEGREE TEMPERATURE/DEWPOINT SPREADS WILL ALSO
   SUPPORT STRONG TO SEVERE WIND GUSTS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...IMY

   SEL7
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 557
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM MDT MON JUL 6 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          SOUTHEASTERN MONTANA
          NORTHEASTERN WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 500 PM UNTIL
   1000 PM MDT.
   
   HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80
   MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70
   STATUTE MILES EITHER SIDE OF A LINE FROM 60 MILES SOUTH OF
   GILLETTE WYOMING TO 30 MILES NORTH NORTHEAST OF MILES CITY
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
   
   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 553...WW 554...WW
   555...WW 556...
   
   DISCUSSION...LINE OF DEVELOPING STORMS...ASSOCIATED WITH AN UPPER
   LEVEL IMPULSE...IS EXPECTED TO MOVE ENEWD AT 35 KT THROUGH PORTIONS
   OF SERN MT/NERN WY DURING THE EVENING HOURS. A WARM FRONT WAS
   LOCATED NEAR THE WY/MT BORDER...WITH ELY BOUNDARY LAYER WINDS AND
   MODERATE INSTABILITY FAVORABLE FOR A FORWARD-PROPAGATING MCS ACROSS
   SERN MT. DESPITE WEAKER DEEP LAYER SHEAR IN NERN WY...THE ORGANIZED
   OUTFLOW AND 25-30 DEGREE TEMPERATURE/DEWPOINT SPREADS WILL ALSO
   SUPPORT STRONG TO SEVERE WIND GUSTS.
   
   AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT
   TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70
   KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM
   MOTION VECTOR 25035.
   
   
   ...IMY

   WOUS64 KWNS 062257
   WOU7
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 557
   NWS STORM PREDICTION CENTER NORMAN OK
   500 PM MDT MON JUL 6 2009
   
   SEVERE THUNDERSTORM WATCH 557 IS IN EFFECT UNTIL 1000 PM MDT
   FOR THE FOLLOWING LOCATIONS
   
   MTC011-017-025-075-087-070400-
   /O.NEW.KWNS.SV.A.0557.090706T2300Z-090707T0400Z/
   
   MT 
   .    MONTANA COUNTIES INCLUDED ARE
   
   CARTER               CUSTER              FALLON              
   POWDER RIVER         ROSEBUD             
   
   
   WYC005-011-019-033-045-070400-
   /O.NEW.KWNS.SV.A.0557.090706T2300Z-090707T0400Z/
   
   WY 
   .    WYOMING COUNTIES INCLUDED ARE
   
   CAMPBELL             CROOK               JOHNSON             
   SHERIDAN             WESTON              
   
   
   ATTN...WFO...BYZ...UNR...RIW...
   
   
   

   SAW7 
   WW 557 SEVERE TSTM MT WY 062300Z - 070400Z
   AXIS..70 STATUTE MILES EITHER SIDE OF LINE..
   60S GCC/GILLETTE WY/ - 30NNE MLS/MILES CITY MT/
   ..AVIATION COORDS.. 60NM EITHER SIDE /40NE DDY - 30NNE MLS/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..70 KNOTS.
   MAX TOPS TO 450. MEAN STORM MOTION VECTOR 25035.
   
   LAT...LON 43430691 46790712 46860416 43500412
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU7.
   

Watch 557 Status Report Messages:

STATUS REPORT #3 ON WW 557

VALID 070235Z - 070340Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 NNE DGW
TO 35 SSE 4BQ TO 15 N SHR.

..PETERS..07/07/09

ATTN...WFO...BYZ...UNR...RIW...

&&

STATUS REPORT FOR WS 557 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-075-087-070340-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
POWDER RIVER	     ROSEBUD		 
$$


WYC011-045-070340-

WY 
.    WYOMING COUNTIES INCLUDED ARE

CROOK		     WESTON		 
$$


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 557

VALID 070135Z - 070240Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..HURLBUT..07/07/09

ATTN...WFO...BYZ...UNR...RIW...

&&

STATUS REPORT FOR WS 557 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-075-087-070240-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
POWDER RIVER	     ROSEBUD		 
$$


WYC005-011-019-033-045-070240-

WY 
.    WYOMING COUNTIES INCLUDED ARE

CAMPBELL	     CROOK		 JOHNSON	     
SHERIDAN	     WESTON		 
$$


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 557

VALID 070035Z - 070140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..HURLBUT..07/07/09

ATTN...WFO...BYZ...UNR...RIW...

&&

STATUS REPORT FOR WS 557 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC011-017-025-075-087-070140-

MT 
.    MONTANA COUNTIES INCLUDED ARE

CARTER		     CUSTER		 FALLON 	     
POWDER RIVER	     ROSEBUD		 
$$


WYC005-011-019-033-045-070140-

WY 
.    WYOMING COUNTIES INCLUDED ARE

CAMPBELL	     CROOK		 JOHNSON	     
SHERIDAN	     WESTON		 
$$


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.