Alert archive / Mississippi / Tornado Watches in 2001

Tornado Watch 786

October 13, 20014 states

The Storm Prediction Center issued this tornado watch at Oct 13, 2001, 9:30 AM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: Oct 13, 2001, 9:30 AM CDT (14:30 UTC)
Expired: Oct 13, 2001, 1:00 PM CDT
In force: 4 hr
Issued by: the Storm Prediction Center

All 45 counties

Mississippi County, AR, Dunklin County, MO, Pemiscot County, MO, Alcorn County, MS, Benton County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, DeSoto County, MS, Grenada County, MS, Itawamba County, MS, Lafayette County, MS, Lee County, MS, Marshall County, MS, Monroe County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Yalobusha County, MS, Benton County, TN, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 78 km from the middle of the area, began a volume at 14:31 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Oct 13, 10:14 AM CDT	Severe Thunderstorm Warning	JAN	Clay	46 min

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 2.5 hours before the alert went out and 56 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 38 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 484 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 42 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

218 
WWUS9 KMKC 131429
SEL6  
MKC WW 131428 COR
MOZ000-MSZ000-TNZ000-131800-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 786
STORM PREDICTION CENTER NORMAN OK
913 AM CDT SAT OCT 13 2001

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   EXTREME SOUTHEAST MISSOURI                           
   NORTHERN MISSISSIPPI                        
   WESTERN TENNESSEE     
   EXTREME NORTHEAST ARKANSAS                      

EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 930 AM UNTIL 100
PM CDT.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES WEST OF COLUMBUS AFB MISSISSIPPI TO 40
MILES NORTH NORTHEAST OF DYERSBURG TENNESSEE.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND 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.

OTHER WATCH INFORMATION...  CONTINUE...WW 785...

DISCUSSION...A LINE OF STORMS MOVING EWD INTO WRN TN AND NRN MS
WILL CONTINUE TO INTENSIFY AS UPPER LEVEL SPEED MAX APPROACHES...
WITH DAMAGING WINDS THE MAIN THREAT. HOWEVER...EXTREMELY STRONG
SHEAR AND WEAK AREAS OF LOW PRESSURE LOCATED ALONG LINE SUGGESTS
THAT ISOLATED TORNADOES ARE ALSO POSSIBLE.     

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH...EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 24035.

...IMY

363,0880 333,0880 333,0901 363,0901

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 12, 11:30 PM CDT	Tornado Watch	SPC	Bradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 14 more	6 hr
Oct 13, 4:00 AM CDT	Tornado Watch	SPC	Issaquena, Sharkey	5 hr
Oct 13, 8:00 AM CDT	Tornado Watch	SPC	Adams, Amite, Attala, Carroll, Choctaw, Claiborne and 31 more	5 hr
Oct 13, 12:15 PM CDT	Tornado Watch	SPC	Choctaw, Clarke, Covington, Forrest, George, Greene and 29 more	6 hr
Oct 13, 1:00 PM CDT	Tornado Watch	SPC	Alcorn, Benton, Chickasaw, Clay, Itawamba, Lee and 6 more	5 hr
Oct 13, 6:00 PM CDT	Tornado Watch	SPC	George, Jackson	6 hr

Nearby

Tornado Watches in Mississippi, 2001 Tornado Watches in Tennessee, 2001 Tornado Watches in Missouri, 2001 Every tornado watch in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.