Alert archive / Louisiana / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 313

May 19, 2000Union County, Arkansas; 17 parishes in Louisiana

The Storm Prediction Center issued this severe thunderstorm watch at May 19, 2000, 6:00 AM CDT for Union County, Arkansas; 17 parishes in Louisiana. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 19, 2000, 6:00 AM CDT (11:00 UTC)
Expired: May 19, 2000, 11:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

Counties Union County, AR, Bienville Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA

The radar

The Shreveport radar (KSHV), 117 km from the middle of the area, began a volume at 10:59 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.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.0 hours before the alert went out and 108 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: 1305 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1293 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 60 m²/s²
0-3 km storm-relative helicity: 158 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 5.4

Open this sounding in Storm Lab

The text

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

000 
WWUS9 KMKC 191038
MKC WW 191038
LAZ000-191600-

URGENT - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WATCH NUMBER 313
STORM PREDICTION CENTER NORMAN OK
538 AM CDT FRI MAY 19 2000

THE STORM PREDICTION CENTER HAS ISSUED A
SEVERE THUNDERSTORM WATCH FOR PORTIONS OF

   NORTHERN LOUISIANA                          

EFFECTIVE THIS FRIDAY MORNING FROM 600 AM UNTIL 1100 AM CDT.

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

THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 45 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 90 MILES WEST OF MONROE LOUISIANA TO
50 MILES EAST OF MONROE LOUISIANA.

REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE
FAVORABLE FOR 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.


DISCUSSION...BOW ECHO HAS DEVELOPED OVER NORTHWESTERN LA AHEAD OF
SURFACE BOUNDARY AND NEAR AXIS OF 2000 J/KG CAPE. 40 KT LOW LEVEL
JET WILL PROVIDE FAVORABLE SHEAR FOR CONTINUED WIND DAMAGE ACROSS
NORTHERN LA.

AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACdE AND ALOFT
TO 1 INCHES.  EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60
KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.  MEAN STORM
MOTION VECTOR 27040.

...ROGASH

;330,0933 331,0911 315,0911 315,0933;

Nearby

Severe Thunderstorm Watches in Louisiana, 2000 Severe Thunderstorm Watches in Arkansas, 2000 Every severe thunderstorm watch in 2000

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.