; Last change: 0045 UTC Title: SPC Valid Mesoscale Discussions Refresh: 10 Font: 1, 11, 1, "Courier New" IconFile: 1, 50, 20, 25, 10, "http://grlevel3.tornadocentral.com/moretext.png" Color: 232 232 175 Line: 3, 0, "MCD #1434 - Valid until 0030 UTC\n DISCUSSION: THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 548 CONTINUES. SEVERE THUNDERSTORMS WITH A PRIMARY THREAT OF DMGG WINDS CONTINUES FOR WW0548. EASTWARD EXTENSION OF COUNTIES OR A NEW WW MAY BE NEEDED IN N TX. THUNDERSTORMS HAVE DEVELOPED ALONG A COLD FRONT EXTENDING WSWWD FROM A SURFACE LOW ROUGHLY OVER SWRN OK...AND ALONG A PREFRONTAL TROUGH THAT EXTENDS SWD INTO THE BIG BEND AREA. GREATE" 32.41, -99.68 31.72, -100.51 31.57, -101.82 31.61, -102.64 32.32, -102.83 33.44, -101.83 34.45, -101.13 35.18, -100.1 34.85, -98.86 33.55, -98.68 32.41, -99.68 32.41, -99.68 End: Object: 32.31, -99.68 Threshold: 999 Icon: 0,0,000,1,1,"MCD 1434 Cont.: R EFFECTIVE SHEAR ALONG THE NRN PORTION OF THE WW HAS ALLOWED FOR BETTER ORGANIZATION OF STORMS...WITH A MEASURED GUST TO 89 MPH RECENTLY REPORTED IN COTTLE COUNTY. FARTHER S...ALTHOUGH EFFECTIVE SHEAR IS COMPARATIVELY WEAKER...STORMS WILL CONTINUE TO PROPAGATE EWD TOWARDS GREATER INSTABILITY. LARGE TEMPERATURE/DEW POINT SPREADS AND STEEP LOW LEVEL LAPSE RATES WILL LEAD TO STRONG WIND GUSTS. GIVEN" End: Object: 32.21, -99.68 Threshold: 999 Icon: 0,0,000,1,1,"MCD 1434 Cont.: CURRENT EXPIRATION TIME...EWD EXTENSION OF COUNTIES OR A NEW WW MAY BE NEEDED IN N TX." End: Color: 232 232 175 Line: 3, 0, "MCD #1433 - Valid until 0015 UTC\n DISCUSSION: THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 545 CONTINUES. REGIONAL RADAR SHOWED A COMPLEX OF STRONG TSTMS ALONG A SRN OK OUTFLOW BOUNDARY /JOHNSTON TO ATOKA COUNTIES IN SERN EXTENT OF WW 546/...WITH STORMS ALONG ERN EXTENT OF THIS COMPLEX TENDING TO WEAKEN AS THEY TRACK INTO SWRN PORTION OF WW 545. MEANWHILE... ADDITIONAL TSTMS ARE DEVELOPING ALONG ANOTHER SURFACE BOUNDARY EXTENDING" 34.1, -95.65 34.7, -95.97 35.17, -95.93 35.63, -94.92 35.61, -93.88 35.11, -92.97 34.86, -93.29 34.44, -94.42 34.13, -95.31 34.1, -95.65 34.1, -95.65 End: Object: 34, -95.65 Threshold: 999 Icon: 0,0,000,1,1,"MCD 1433 Cont.: WNW-ESE FROM KINGFISHER COUNTY OK TO WRN AR. AIR MASS ALONG AND N OF THE SRN OK OUTFLOW BOUNDARY IS MODERATELY UNSTABLE WITH EFFECTIVE BULK SHEAR OF 30-45 KT. THIS SUGGESTS TSTMS SHOULD HAVE A POTENTIAL TO BECOME STRONG TO SEVERE ACROSS ERN OK TO FAR WRN AR THROUGH THE EARLY EVENING." End: Color: 232 232 175 Line: 3, 0, "MCD #1432 - Valid until 0000 UTC\n DISCUSSION: ISOLD STRONG TO SEVERE STORMS CAN BE EXPECTED OVER THE NEXT FEW HOURS...WITH PRIMARY THREATS OF DMGG WINDS/LARGE HAIL. DUE TO ISOLD NATURE...A WW IS NOT ANTICIPATED. THUNDERSTORMS HAVE INCREASED ACROSS NERN NV INTO SWRN ID AHEAD OF A WEAK VORT MAX MOVING INTO NERN NV. ABOVE NORMAL MOISTURE AND WEAK INSTABILITY SHOULD BE SUPPORTIVE OF ADDITIONAL DEVELOPMENT OVER THE HIGHER TERRAIN...ALTHOUGH DRIER" 40.24, -113.19 39.6, -113.81 39.42, -115.32 40, -116.5 40.84, -116.52 42.28, -114.15 43.01, -113.65 43.41, -113.51 43.62, -111.79 43.08, -111.22 41.86, -112.82 40.98, -113 40.24, -113.19 40.24, -113.19 End: Object: 40.14, -113.19 Threshold: 999 Icon: 0,0,000,1,1,"MCD 1432 Cont.: AIR ADVECTING NEWD MAY LIMIT THE TEMPORAL THREAT COMPARED TO PREVIOUS DAYS. 30 KTS EFFECTIVE SHEAR WILL BE SUPPORTIVE OF BRIEF ROTATION...ESPECIALLY IN FAVORED TERRAIN INDUCED CIRCULATIONS. LARGE TEMPERATURE/DEW POINT SPREADS AND STEEP LOW LEVEL LAPSE RATES WILL LEAD TO ISOLD DMGG WIND GUSTS AS EVAPORATIVE COOLING/PRECIPITATION LOADING ENHANCES DOWNDRAFT WINDS. DOWNDRAFTS MAY ACCELERATE INTO LOWE" End: Object: 40.04, -113.19 Threshold: 999 Icon: 0,0,000,1,1,"MCD 1432 Cont.: R VALLEYS TOWARDS GREATER INSTABILITY...AND MAY BE WELL REMOVED FROM THE PARENT STORM." End: