Alert archive / Louisiana / Severe Thunderstorm Warnings in 1989
Severe Thunderstorm Warning 39, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 18, 1989, 12:57 PM CDT for West Feliciana Parish, Louisiana. It was in force for 63 min.
The area
The counties it named.
The facts
- Issued
- May 18, 1989, 12:57 PM CDT (17:57 UTC)
- Expired
- May 18, 1989, 2:00 PM CDT
- In force
- 63 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County West Feliciana Parish, LA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.0 hours before the alert went out and 179 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
- 1217 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 537 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.8
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.
In the hours before
Special weather statement, May 18, 7:25 AM CDT, 5 hours 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE BATON ROUGE LA 725 AM CDT THU MAY 18 1989 ..A FLASH FLOOD WATCH CONTINUES IN EFFECT FOR AVOYELLES...CATAHOULA... CONCORDIA AND ST LANDRY PARISHES THROUGH TODAY. RADAR SHOWED AN AREA OF RAIN SPREAD ACROSS MUCH OF CENTRAL AND SOUTHWEST AND INTO PARTS OF EAST CENTRAL LOUISIANA. WITHIN THE AREA OF RAIN WERE A FEW THUNDERSTORMS WITH HEAVY RAIN. THE LEADING EDGE OF THE AREA OF RAIN EXTENDED SOUTH FROM JACKSON MISSISSIPPI TO THE SOUTHWEST CORNER OF MISSISSIPPI TO NEAR LAFAYETTE. THE AREA OF RAIN WAS SPREADING EAST ABOUT 15 MPH. HEAVY RAINS...DANGEROUS LIGHTNING AND POSSIBLY SOME HAIL ARE ASSOCIATED WITH THE THUNDERSTORMS. THE GROUND IS SATURATED AND THE HEAVY RAINS WILL LIKELY CAUSE FLOODING OF ROADS AND LOW LYING AREAS. THUNDERSTORMS ARE EXPECTED TO INCREASE WITHIN THE AREA OF RAIN BY AFTERNOON.
Local storm report, May 18, 11:41 AM CDT, 1 hour 16 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE BATON ROUGE LA
1142 AM CDT THU MAY 18 1989
MAY 18 1989...
1134 AM CDT...TREES AND POWER LINES DOWN...HIGH WINDS AND STREET
FLOODING IN WASHINGTON LA ABOUT 7 MILES NORTH OF OPELOUSAS...BY
THE ST LANDRY PARISH SHERIFF OFFICE. NO INJURIES.The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 11:22 AM CDT | Severe Thunderstorm Warning | LIX | Saint Landry | 68 min |
| May 18, 11:51 AM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, Saint Landry | 69 min |
| May 18, 12:13 PM CDT | Severe Thunderstorm Warning | LIX | Iberia, Saint Martin | 62 min |
| May 18, 12:29 PM CDT | Tornado Warning | LIX | Saint Martin | 46 min |
| May 18, 12:29 PM CDT | Tornado Warning | LIX | Saint Landry | 61 min |
| May 18, 12:57 PM CDT | Severe Thunderstorm Warning | LIX | Iberville, Pointe Coupee, West Baton Rouge | 63 min |
| May 18, 1:14 PM CDT | Tornado Warning | LIX | Iberville, West Baton Rouge | 46 min |
| May 18, 1:57 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge | 48 min |
| May 18, 2:30 PM CDT | Severe Thunderstorm Warning | LIX | Iberia, Saint Martin | 60 min |
| May 18, 3:38 PM CDT | Severe Thunderstorm Warning | LIX | Iberville, West Baton Rouge | 52 min |
| May 18, 4:01 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, East Baton Rouge | 44 min |
| May 18, 4:50 PM CDT | Severe Thunderstorm Warning | LIX | Assumption, Saint Martin, St. Mary | 55 min |
| May 18, 5:09 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 66 min |
| May 18, 5:27 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 63 min |
| May 18, 5:33 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 42 min |
| May 18, 6:33 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 42 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1989Every severe thunderstorm warning in 1989
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.