Severe Thunderstorm Warning 423, NWS Norman, OK

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
325 PM CDT MON SEP 11 2000

A FAIRLY STRONG COLD FRONT IS NOW APPROACHING THE NORTHWESTERN PART
OF OKLAHOMA.  THE FRONT HAS A GOOD PUSH BEHIND IT AND SHOULD REACH
SOUTHERN OKLAHOMA TOMORROW MORNING.  THE FRONT IS DRY AT THIS
TIME... BUT WILL BE MOVING INTO AN AREA OF MUCH GREATER LOW-LEVEL
MOISTURE AS IT ENTERS THE EASTERN HALF OF OKLAHOMA.  INDICATIONS ARE
THAT A MESOSCALE CONVECTIVE SYSTEM WILL DEVELOP OVER SOUTHEAST
KANSAS... THEN MOVE/DEVELOP SOUTH INTO EASTERN OKLAHOMA.  THE
WESTERN PART OF THE SYSTEM MAY AFFECT THE EASTERN PORTION OF OUR
FORECAST AREA LATE TONIGHT AND EARLY TOMORROW.

OTHER ISOLATED SHOWERS AND THUNDERSTORMS HAVE ALREADY DEVELOPED IN
OUR TEXAS COUNTIES AND THESE SHOULD PERSIST WELL INTO THE EVENING.
THEY APPEAR TO BE ASSOCIATED WITH ELEVATED INSTABILITY AND MOISTURE.

BY MID-WEEK... THE FRONT WILL HAVE RETURNED NORTH AND WARM DRY
WEATHER WILL REESTABLISH ITSELF FOR A DAY OR TWO.  THEN... ANOTHER
COLD FRONT IS EXPECTED TO PLUNGE THROUGH THE PLAINS ON THURSDAY AS
THE EAST COAST TROUGH AMPLIFIES.  THIS FRONT SHOULD BE DRY... BUT
WILL HELP HOLD TEMPERATURES CLOSE TO SEASONAL NORMALS... RATHER THAN
THE JULY-LIKE TEMPERATURES OF THE PAST WEEK.

FCSTID = 23 = CMS

OKC   68  83  60  83 /  30  20   0   0
HBR   66  85  59  85 /  20   0   0   0
SPS   71  88  62  86 /  20  20  20   0
GAG   58  82  55  86 /  20   0   0   0
PNC   65  83  58  83 /  30   0   0   0
DUA   72  89  62  85 /  40  40  20   0

.OUN...
OK...NONE.
TX...NONE.

OKZ004>048-050>052-TXZ083>090-120100-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
525 PM CDT MON SEP 11 2000

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS EVENING ACROSS
CENTRAL AND WESTERN OKLAHOMA AND WESTERN SECTIONS OF NORTH TEXAS TO
THE WEST OF A LINE FROM PONCA CITY...TO SHAWNEE...TO PAULS
VALLEY...TO ARCHER CITY TEXAS...AND EAST OF A LINE FROM ALVA TO
HOLLIS. THE PRIMARY SEVERE WEATHER THREAT WILL BE LOCALIZED DAMAGING
WINDS.

DISCUSSION...THE COMBINATION OF VERY HOT TEMPERATURES...LOW RELATIVE
HUMIDITY VALUES AND RELATIVLY COOL AIR IN MID LEVELS OF THE
ATMOSPHERE WILL CREATE CONDITIONS FAVORABLE FOR ISOLATED SEVERE
THUNDERSTORMS THROUGH THE EVENING. THESE STORMS WILL HAVE THE
POTENTIAL TO PRODUCE LOCALLY DAMAGING WINDS...CALLED MICROBURSTS...AS
THEY DEVELOP THEN RAPIDLY COLLAPSE.

THE THREAT FOR DAMAGING WINDS WILL LESSEN AFTER DARK AS TEMPERATURES
COOL AND THE ATMOSPHERE BECOMES MORE STABLE. WIDESPREAD SPOTTER
ACTIVATION IS NOT EXPECTED THIS EVENING DUE TO THE BRIEF ISOLATED
NATURE OF THE SEVERE WEATHER THREAT.

DA

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
623 PM CDT MON SEP 11 2000

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0555 PM    6 S RANDLETT              OK   80 MPH WIND GUST
09/11/00   COTTON                         PUBLIC REPORT.  LARGE TREES
                                          DAMAGED.

0558 PM    12 SW EL RENO             OK   60 MPH WIND GUST
09/11/00   CANADIAN                       PUBLIC REPORT.

0605 PM    6 NW EL RENO              OK   .75 INCH HAIL
09/11/00 o  CANADIAN                       PUBLIC REPORT

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
650 PM CDT MON SEP 11 2000

TIME (CDT) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0535 PM    BURKBURNETT               TX   WIND DAMAGE
09/11/00   WICHITA                        WINDOW DAMAGE TO 6 TRAILER
                                          HOMES. ROOF OFF ONE BRICK
                                          DWELLING. SMALL OUT BUILDINGS
                                          DAMAGED. NUMEROUS TREES AND POWER
                                          LINES DAMAGED ON NW PART OF CITY
                                          OCCURRED FROM 1725-1735.
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