Alert archive / Louisiana / Tornado Warnings in 1999
Tornado Warning 40, NWS New Orleans, LA
NWS New Orleans, LA issued this tornado warning at Jul 27, 1999, 5:00 PM CDT for East Baton Rouge Parish, Louisiana. It was in force for 30 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
- Jul 27, 1999, 5:00 PM CDT (22:00 UTC)
- Expired
- Jul 27, 1999, 5:30 PM CDT
- In force
- 30 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County East Baton Rouge Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 10.0 hours before the alert went out and 138 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.
- Mixed-layer CAPE
- 1170 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 927 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -12 m²/s²
- 0-3 km storm-relative helicity
- 17 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 272202 TORNEW LAC033-272230- BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 500 PM CDT TUE JUL 27 1999 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS LA HAS ISSUED A... * TORNADO WARNING FOR - EAST BATON ROUGE PARISH IN SOUTHEASTERN LOUISIANA * UNTIL 530 PM CDT * AT 456 PM CDT... NATIONAL WEATHER SERVICE COOPERATIVE OPBSERVER REPORTED A TORNADO NEAR SOUTHEAST BATON ROUGE APPROACHING HIGHLAND ROAD AND MOVING WEST AT 10 MPH. * SOME LOCATIONS IN AND NEAR THE PATH OF THIS TORNADO ARE... BATON ROUGE BETWENN 5 AND 530 PM CDT IF YOU ARE IN THESE AREAS...SEEK SHELTER IN A SMALL INTERIOR ROOM AWAY FROM WINDOWS IF YOU ARE IN THE PATH OF A TORNADO...GETf UNDER A WORKBENCH OR PIECE OF STURDY FURNITURE. SEEK SHELTER IN AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST FLOOR. USE BLANKETS...PILLOWS...OR CUSHIONS TO COVER YOUR BODY. AVOID WINDOWS. &
What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at Jul 27, 2:08 PM CDT, 2 hours 52 minutes earlier.
Area forecast discussion, Jul 27, 2:08 PM CDT, 2 hours 52 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 200 PM TUE JUL 27 1999 NO SIGNIFICANT CHANGE IN THE OVERALL SYNOPTIC PATTERN AS INDICATED BY THE CURRENT MODELS. ALL MODELS STILL HOLDING THE UPPER LEVEL RIDGE ROUGHLY IN TACT THROUGH THE FORECAST PERIOD. THE MODELS...ALONG WITH HPC SFC PROG GUIDANCE...HOLD THE SFC HIGH IN PLACE OVER THE SE THROUGH SUN AS WELL. ONE OF THE MOST INTERESTING FEATURES IS THE ETA AND THE NGM ALL BUT DRY THE AREA OUT BY WED PM. ALTHOUGH WITH RELATIVELY WEAK QPF VALUES INDICATED...THE AVN STILL WANTS TO HOLD SOME PRECIP OVER THE AREA THROUGH THU ALTHOUGH THE LACK OF AVAILABLE ENERGY WOULD SUGGEST OTHERWISE. AVN GUIDANCE VALUES DICTATE THIS AS WELL. WILL ULTIMATELY TREND TOWARD THE NGM AND ETA HANDLING OF THE PRECIP FOR THIS PACKAGE. BOTH MODELS BRING UPPER LEVEL DISTURBANCES INTO THE AREA THIS AFTERNOON AND TONIGHT. ALONG WITH DIFF HEATING...THIS SHOULD BE THE PRIMARY FOCUS FOR ANY CONVECTION LEADING INTO THIS EVENING. BOTH ARE CONSISTENT AS WELL PULLING THESE DISTURBANCES TOWARD THE WEST AND CREATING MORE OF AN OPEN FLOW BY WED. WILL LEAVE ISOLATED AND WIDELY SCATTERED IN THE FORECAST FOR WED AND THU AFTERNOON TO ACCOUNT FOR ANY CONVECTION AS A RESULT OF DAYTIME HEATING. WILL DEVIATE LITTLE FROM THE EXTENDED ZONES FORECAST AS ONCE AGAIN...LITTLE CHANGE IN THE SYNOPTIC FLOW SUGGEST NOTHING SIGNIFICANT AFFECTING CONDITIONS HERE THROUGH SUN. 0 MCB 72/95/73/95 1101 BTR 75/94/76/95 1202 MSY 75/95/76/96 1202 BIX 79/93/80/94 1202 .NEW...NONE LA...NONE MS...NONE. 09
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 4:12 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Saint James, Saint John the Baptist | 38 min |
| Jul 27, 4:45 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, East Baton Rouge, Iberville, West Baton Rouge | 65 min |
Nearby
Tornado Warnings in Louisiana, 1999Every tornado warning in 1999Tornadoes in 1999
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.