WSUS31 KKCI 281255 SIGE MKCE WST 281255 CONVECTIVE SIGMET 21E VALID UNTIL 1455Z NC SC GA TN AL MS FROM RDU-IRQ-MEI-40NNW SQS-40N MSL-RDU AREA EMBD TS MOV FROM 25045KT. TOPS ABV FL450. OUTLOOK VALID 281455-281855 FROM DCA-ECG-CHS-CEW-30W BWG-DCA WST ISSUANCES EXPD. REFER TO MOST RECENT ACUS01 KWNS FROM STORM PREDICTION CENTER FOR SYNOPSIS AND METEOROLOGICAL DETAILS.