Severe Storm Outlook Narrative (AC)
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000
ACUS11 KWNS 250708
SWOMCD
SPC MCD 250707
ALZ000-MSZ000-LAZ000-250830-

MESOSCALE DISCUSSION 0446
NWS STORM PREDICTION CENTER NORMAN OK
0207 AM CDT SAT APR 25 2015

AREAS AFFECTED...NORTHERN/CENTRAL MS TO WEST-CENTRAL AL

CONCERNING...TORNADO WATCH 104...105...106...

VALID 250707Z - 250830Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH
104...105...106...CONTINUES.

SUMMARY...POTENTIAL FOR DAMAGING WINDS AND COUPLE OF TORNADOES
CONTINUES ACROSS CENTRAL/PARTS OF NORTHERN MS INTO WEST-CENTRAL AL
OVERNIGHT. TORNADO WATCHES 105/106 CONTINUE UNTIL 09Z/13Z
RESPECTIVELY.

DISCUSSION...LEWP SQUALL LINE CONTINUES TO STEADILY PROGRESS
EASTWARD ACROSS NORTH-CENTRAL MS...WITH THE STRONGEST EMBEDDED
UPDRAFT AND BOW/EMBEDDED CIRCULATION NOW REACHING THE I-55 CORRIDOR
JUST NORTH OF JACKSON AS OF 07Z/200AM CDT. THE WELL-ORGANIZED SYSTEM
IS ASSOCIATED WITH A MODEST PRESSURE RISE/FALL COUPLET AS OF 06Z. A
WARM FRONT CONTINUES TO SPREAD SLOWLY NORTHEASTWARD IMMEDIATELY
AHEAD OF THE SQUALL LINE...AND THE MOST INTENSE PART OF THE LINE
SHOULD REMAIN SEMI-FOCUSED ACROSS CENTRAL/EAST-CENTRAL MS INTO
WEST-CENTRAL AL NEAR/JUST NORTH OF THE WARM FRONT WHERE
MOIST/UNSTABLE INFLOW IS MAXIMIZED. WITH AID OF A STRONG
SOUTHWESTERLY LOW-LEVEL JET...A SPECIAL 06Z OBSERVED SOUNDING FROM
JACKSON SHOWS CONSIDERABLE MOISTENING/DESTABILIZATION SINCE EARLIER
THIS EVENING /00Z/ WITH 600+ J/KG MLCAPE AND AROUND 1.8 INCH
PRECIPITABLE WATER. REGIONAL WSR-88D VWP DATA AND THE 06Z JACKSON
SOUNDING SHOW THAT STRONG ENVIRONMENTAL VERTICAL WIND
SHEAR...INCLUDING 300+ M2/S2 EFFECTIVE SHEAR MAXIMIZED NEAR THE WARM
FRONT...REMAINS VERY SUPPORT OF QUASI-LINEAR ORGANIZATION WITH
EMBEDDED SUPERCELLS/MESOVORTICES CAPABLE OF DAMAGING
WINDS/TORNADOES...ESPECIALLY ACROSS CENTRAL/EAST-CENTRAL MS INTO
WEST-CENTRAL AL.

..GUYER.. 04/25/2015

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...BMX...MOB...MEG...JAN...

LAT...LON   32349127 32649023 33268975 33948891 33588726 31918822
            31949050 32349127



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