Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 126, NWS New Orleans, LA

June 30, 2001Saint Tammany Parish, Louisiana

NWS New Orleans, LA issued this severe thunderstorm warning at Jun 30, 2001, 12:27 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 30, 2001, 12:27 PM CDT (17:27 UTC)
Expired
Jun 30, 2001, 1:00 PM CDT
In force
33 min
Issued by
NWS New Orleans, LA
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Saint Tammany Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.5 hours before the alert went out and 213 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-pSkew-T log-p diagram, Jackson, MS at 12:00Z on 2001-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 324 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2001-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 11 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
324 J/kg
Mixed-layer CIN
-122 J/kg
Mixed-layer LCL
1240 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
11 m²/s²
0-3 km storm-relative helicity
27 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS New Orleans, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 29, 3:45 PM CDT, 20 hours 42 minutes earlier.

Area forecast discussion, Jun 29, 3:45 PM CDT, 20 hours 42 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA
345 PM CDT FRI JUN 29 2001

STILL RIDING WITH THE AVN AS MODEL OF CHOICE AS IT HAS BEEN THE
BETTER PERFORMER OF LATE. THE MAIN TREND WILL BE TO INCREASE POPS BY
10 PERCENT TOMORROW AND SUNDAY BUT MAINTAIN SCATTERED POPS. THIS IS
TYPICAL OF THE SEASON ALONG WITH CLIMO TEMPS.

THE MAIN DRIVING FEATURES CONTINUE TO BE THE PERSISTENT UPPER LEVEL
LOW OVER THE OZARKS WHICH DRIFTS SOUTHWARD INTO THE EAST TEXAS
REGION OVER THE WEEKEND. AN OPEN GULF FLOW SHOULD MAINTAIN
CLIMATOLOGICAL CONDITIONS THROUGH THE EXTENDED PERIOD.

MCB 67/89/69/87 2435      BTR 70/88/70/87 2435
MSY 73/89/74/88 2435      GPT H70/88/73/88 2425

.NEW...NONE
LA...NONE.
MS...NONE.

24

Nearby

Severe Thunderstorm Warnings in Louisiana, 2001Every severe thunderstorm warning 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.