SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 578
   NWS STORM PREDICTION CENTER NORMAN OK
   100 PM MDT MON JUL 13 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL AND PART OF EASTERN MONTANA
          PART OF NORTH-CENTRAL WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 800
   PM MDT.
   
   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 90
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH
   SOUTHEAST OF BILLINGS MONTANA TO 80 MILES NORTHWEST OF GLASGOW
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 576...WW 577...
   
   DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY AHEAD OF STRONG SHORT
   WAVE TROUGH AND ASSOCIATED COLD FRONT MOVING EWD THROUGH THE NRN
   HIGH PLAINS.  GIVEN THE PRESENCE OF STEEP LOW TO MIDLEVEL LAPSE
   RATES...MODERATE CONVECTIVE INSTABILITY AND STRENGTHENING DEEP-LAYER
   SHEAR...SETUP WILL FAVOR THE DEVELOPMENT OF SUPERCELLS AND BOWING
   LINE SEGMENTS WITH THE PRIMARY THREATS BEING DAMAGING WINDS AND
   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 500. MEAN STORM
   MOTION VECTOR 26030.
   
   
   ...MEAD/THOMPSON

   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 578
   NWS STORM PREDICTION CENTER NORMAN OK
   100 PM MDT MON JUL 13 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL AND PART OF EASTERN MONTANA
          PART OF NORTH-CENTRAL WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 800
   PM MDT.
   
   WIDELY SCATTERED DAMAGING WINDS
   ISOLATED WIND GUSTS TO 70 MPH POSSIBLE
   WIDELY SCATTERED LARGE HAIL TO 2.0 INCHES IN DIAMETER
   ISOLATED TORNADOES
   
   THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 90
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH
   SOUTHEAST OF BILLINGS MONTANA TO 80 MILES NORTHWEST OF GLASGOW
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 576...WW 577...
   
   DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY AHEAD OF STRONG SHORT
   WAVE TROUGH AND ASSOCIATED COLD FRONT MOVING EWD THROUGH THE NRN
   HIGH PLAINS.  GIVEN THE PRESENCE OF STEEP LOW TO MIDLEVEL LAPSE
   RATES...MODERATE CONVECTIVE INSTABILITY AND STRENGTHENING DEEP-LAYER
   SHEAR...SETUP WILL FAVOR THE DEVELOPMENT OF SUPERCELLS AND BOWING
   LINE SEGMENTS WITH THE PRIMARY THREATS BEING DAMAGING WINDS AND
   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 500. MEAN STORM
   MOTION VECTOR 26030.
   
   
   ...MEAD/THOMPSON

   SEL8
   
   URGENT - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH NUMBER 578
   NWS STORM PREDICTION CENTER NORMAN OK
   100 PM MDT MON JUL 13 2009
   
   THE NWS STORM PREDICTION CENTER HAS ISSUED A
   SEVERE THUNDERSTORM WATCH FOR PORTIONS OF 
   
          CENTRAL AND PART OF EASTERN MONTANA
          PART OF NORTH-CENTRAL WYOMING
   
   EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 100 PM UNTIL 800
   PM MDT.
   
   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 90
   STATUTE MILES EAST AND WEST OF A LINE FROM 60 MILES SOUTH
   SOUTHEAST OF BILLINGS MONTANA TO 80 MILES NORTHWEST OF GLASGOW
   MONTANA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
   ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU8).
   
   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 576...WW 577...
   
   DISCUSSION...TSTMS ARE EXPECTED TO INTENSIFY AHEAD OF STRONG SHORT
   WAVE TROUGH AND ASSOCIATED COLD FRONT MOVING EWD THROUGH THE NRN
   HIGH PLAINS.  GIVEN THE PRESENCE OF STEEP LOW TO MIDLEVEL LAPSE
   RATES...MODERATE CONVECTIVE INSTABILITY AND STRENGTHENING DEEP-LAYER
   SHEAR...SETUP WILL FAVOR THE DEVELOPMENT OF SUPERCELLS AND BOWING
   LINE SEGMENTS WITH THE PRIMARY THREATS BEING DAMAGING WINDS AND
   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 500. MEAN STORM
   MOTION VECTOR 26030.
   
   
   ...MEAD/THOMPSON

   WOUS64 KWNS 131858
   WOU8
   
   BULLETIN - IMMEDIATE BROADCAST REQUESTED
   SEVERE THUNDERSTORM WATCH OUTLINE UPDATE FOR WS 578
   NWS STORM PREDICTION CENTER NORMAN OK
   100 PM MDT MON JUL 13 2009
   
   SEVERE THUNDERSTORM WATCH 578 IS IN EFFECT UNTIL 800 PM MDT
   FOR THE FOLLOWING LOCATIONS
   
   MTC003-005-009-015-027-033-037-041-045-051-055-065-067-069-071-
   087-095-097-103-105-107-111-140200-
   /O.NEW.KWNS.SV.A.0578.090713T1900Z-090714T0200Z/
   
   MT 
   .    MONTANA COUNTIES INCLUDED ARE
   
   BIG HORN             BLAINE              CARBON              
   CHOUTEAU             FERGUS              GARFIELD            
   GOLDEN VALLEY        HILL                JUDITH BASIN        
   LIBERTY              MCCONE              MUSSELSHELL         
   PARK                 PETROLEUM           PHILLIPS            
   ROSEBUD              STILLWATER          SWEET GRASS         
   TREASURE             VALLEY              WHEATLAND           
   YELLOWSTONE          
   
   
   WYC033-140200-
   /O.NEW.KWNS.SV.A.0578.090713T1900Z-090714T0200Z/
   
   WY 
   .    WYOMING COUNTIES INCLUDED ARE
   
   SHERIDAN             
   
   
   ATTN...WFO...BYZ...GGW...TFX...
   
   
   

   SAW8 
   WW 578 SEVERE TSTM MT WY 131900Z - 140200Z
   AXIS..90 STATUTE MILES EAST AND WEST OF LINE..
   60SSE BIL/BILLINGS MT/ - 80NW GGW/GLASGOW MT/
   ..AVIATION COORDS.. 80NM E/W /44WNW SHR - 69NW GGW/
   HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.
   MAX TOPS TO 500. MEAN STORM MOTION VECTOR 26030.
   
   LAT...LON 44970990 49000984 49000587 44970622
   
   THIS IS AN APPROXIMATION TO THE WATCH AREA.  FOR A
   COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS
   FOR WOU8.
   

Watch 578 Status Report Messages:

STATUS REPORT #5 ON WW 578

VALID 140130Z - 140240Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 55 WNW SHR
TO 50 NE BIL TO 60 SSW GGW TO 65 N GGW.

..JEWELL..07/14/09

ATTN...WFO...BYZ...TFX...GGW...

&&

STATUS REPORT FOR WS 578 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC003-011-017-025-033-055-075-087-103-105-140240-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BIG HORN	     CARTER		 CUSTER 	     
FALLON		     GARFIELD		 MCCONE 	     
POWDER RIVER	     ROSEBUD		 TREASURE	     
VALLEY		     
$$


WYC033-140240-

WY 
.    WYOMING COUNTIES INCLUDED ARE

SHERIDAN	     
$$


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 578

VALID 140030Z - 140140Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 35 NE COD TO
45 SE LWT TO 50 NE LWT TO 45 N LWT TO 50 NNE HVR.

..JEWELL..07/14/09

ATTN...WFO...BYZ...TFX...GGW...

&&

STATUS REPORT FOR WS 578 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC003-005-011-017-025-033-055-065-069-071-075-087-103-105-111-
140140-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BIG HORN	     BLAINE		 CARTER 	     
CUSTER		     FALLON		 GARFIELD	     
MCCONE		     MUSSELSHELL	 PETROLEUM	     
PHILLIPS	     POWDER RIVER	 ROSEBUD	     
TREASURE	     VALLEY		 YELLOWSTONE	     
$$


WYC033-140140-

WY 
.    WYOMING COUNTIES INCLUDED ARE

SHERIDAN	     
$$


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 578

VALID 132345Z - 140040Z

SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 ESE GTF
TO 35 NW LWT TO 45 N LWT TO 45 NNE HVR.

..JEWELL..07/13/09

ATTN...WFO...BYZ...TFX...GGW...

&&

STATUS REPORT FOR WS 578 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC003-005-009-011-017-025-027-033-037-045-055-065-067-069-071-
075-087-095-097-103-105-107-111-140040-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BIG HORN	     BLAINE		 CARBON 	     
CARTER		     CUSTER		 FALLON 	     
FERGUS		     GARFIELD		 GOLDEN VALLEY	     
JUDITH BASIN	     MCCONE		 MUSSELSHELL	     
PARK		     PETROLEUM		 PHILLIPS	     
POWDER RIVER	     ROSEBUD		 STILLWATER	     
SWEET GRASS	     TREASURE		 VALLEY 	     
WHEATLAND	     YELLOWSTONE	 
$$


WYC033-140040-

WY 
.    WYOMING COUNTIES INCLUDED ARE

SHERIDAN	     
$$


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 578

VALID 132040Z - 132140Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..MEAD..07/13/09

ATTN...WFO...BYZ...TFX...GGW...

&&

STATUS REPORT FOR WS 578 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC003-005-009-015-027-033-037-041-045-051-055-065-067-069-071-
087-095-097-103-105-107-111-132140-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BIG HORN	     BLAINE		 CARBON 	     
CHOUTEAU	     FERGUS		 GARFIELD	     
GOLDEN VALLEY	     HILL		 JUDITH BASIN	     
LIBERTY 	     MCCONE		 MUSSELSHELL	     
PARK		     PETROLEUM		 PHILLIPS	     
ROSEBUD 	     STILLWATER 	 SWEET GRASS	     
TREASURE	     VALLEY		 WHEATLAND	     
YELLOWSTONE	     
$$


WYC033-132140-

WY 
.    WYOMING COUNTIES INCLUDED ARE

SHERIDAN	     
$$


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 578

VALID 131940Z - 132040Z

THE SEVERE WEATHER THREAT CONTINUES ACROSS THE ENTIRE WATCH AREA.

..MEAD..07/13/09

ATTN...WFO...BYZ...TFX...GGW...

&&

STATUS REPORT FOR WS 578 

SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS 

MTC003-005-009-015-027-033-037-041-045-051-055-065-067-069-071-
087-095-097-103-105-107-111-132040-

MT 
.    MONTANA COUNTIES INCLUDED ARE

BIG HORN	     BLAINE		 CARBON 	     
CHOUTEAU	     FERGUS		 GARFIELD	     
GOLDEN VALLEY	     HILL		 JUDITH BASIN	     
LIBERTY 	     MCCONE		 MUSSELSHELL	     
PARK		     PETROLEUM		 PHILLIPS	     
ROSEBUD 	     STILLWATER 	 SWEET GRASS	     
TREASURE	     VALLEY		 WHEATLAND	     
YELLOWSTONE	     
$$


WYC033-132040-

WY 
.    WYOMING COUNTIES INCLUDED ARE

SHERIDAN	     
$$


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.