Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 159, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at May 28, 1997, 3:08 PM CDT for Saint James Parish, Louisiana. It was in force for 67 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 28, 1997, 3:08 PM CDT (20:08 UTC)
- Expired
- May 28, 1997, 4:15 PM CDT
- In force
- 67 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Saint James Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 28, 3:32 PM CDT | Hail 1.5 | Convent, LA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 28, 1:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 8.1 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.
- Mixed-layer CAPE
- 570 J/kg
- Mixed-layer CIN
- -154 J/kg
- Mixed-layer LCL
- 1200 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 23 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
945 WUUS1 KNEW 282011 RRA SVRNEW LAC093-282115- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 308 PM CDT WED MAY 28 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 415 PM CDT FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...ST. JAMES PARISH AT 310 PM NATIONAL WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM OVER ST JAMES PARISH NEAR DONALDSONVILLE. THE THUNDERSTORM IS MOVING EAST AT 5 MPH. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A STRONG BUILDING. DAMAGING WIND...LARGE HAIL...VERY HEAVY RAIN... AND DEADLY LIGHTNING ARE ALL POSSIBLE IN SEVERE THUNDERSTORMS. STAY INSIDE AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.
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 28, 11:48 AM CDT, 3 hours 20 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-291200- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1150 AM CDT WED MAY 28 1997 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN EAST CENTRAL... SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI THIS AFTERNOON. THIS ACTIVITY WILL CONTINUE INTO THE NIGHT WITH THE APPROACH OF A COLD FRONT THAT SHOULD REACH CENTRAL LOUISIANA AFTER MIDNIGHT. VERY WARM..HUMID AND UNSTABLE CONDITIONS CONTINUE OVER THE AREA TODAY. UPPER AIR SOUNDINGS.. WHEN MODIFIED FOR AFTERNOON HEATING...INDICATE ADDITIONAL INSTABILITY. THIS CONDITION WILL LEAD TO THE POSSIBILITY OF ISOLATED SEVERE THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL AND STRONG GUSTY WINDS THIS AFTERNOON AND TONIGHT.
Special weather statement, May 28, 11:50 AM CDT, 3 hours 18 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-291200- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1150 AM CDT WED MAY 28 1997 THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS IN EAST CENTRAL... SOUTHEAST LOUISIANA AND SOUTH MISSISSIPPI THIS AFTERNOON. THIS ACTIVITY WILL CONTINUE INTO THE NIGHT WITH THE APPROACH OF A COLD FRONT THAT SHOULD REACH CENTRAL LOUISIANA AFTER MIDNIGHT. VERY WARM..HUMID AND UNSTABLE CONDITIONS CONTINUE OVER THE AREA TODAY. UPPER AIR SOUNDINGS.. WHEN MODIFIED FOR AFTERNOON HEATING...INDICATE ADDITIONAL INSTABILITY. THIS CONDITION WILL LEAD TO THE POSSIBILITY OF ISOLATED SEVERE THUNDERSTORMS WITH LOCALLY HEAVY RAINFALL AND STRONG GUSTY WINDS THIS AFTERNOON AND TONIGHT.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 1:45 PM CDT | Severe Thunderstorm Warning | LIX | Livingston | 60 min |
| May 28, 4:45 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche | 15 min |
| May 28, 4:55 PM CDT | Tornado Warning | LIX | Lafourche | 35 min |
| May 28, 5:27 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche | 33 min |
| May 28, 6:31 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee | 29 min |
| May 28, 6:50 PM CDT | Severe Thunderstorm Warning | LIX | West Feliciana | 25 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.