Alert archive / Louisiana / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 210, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Jul 13, 1997, 1:11 PM CDT for Saint Tammany Parish, Louisiana. It was in force for 64 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 13, 1997, 1:11 PM CDT (18:11 UTC)
- Expired
- Jul 13, 1997, 2:15 PM CDT
- In force
- 64 min
- Issued by
- NWS New Orleans, LA
- Area
- Whole counties
County Saint Tammany Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 6.2 hours before the alert went out and 30 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
- 1858 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 2 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KNEW 131812 RRA SVRNEW LAC103-LAZ501-131915- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING NATIONAL WEATHER SERVICE NEW ORLEANS LA 111 PM CDT SUN JUL 13 1997 THE NATIONAL WEATHER SERVICE IN NEW ORLEANS HAS ISSUED A SEVERE THUNDERSTORM AND SPECIAL MARINE WARNING EFFECTIVE UNTIL 215 PM CDT FOR RESIDENTS IN THE FOLLOWING LOCATION... IN SOUTHEAST LOUISIANA ...SOUTH CENTRAL ST. TAMMANY PARISH AND FOR MARINE INTERESTS IN THE COASTAL WATERS AROUND... ...LAKE PONTCHARTRAIN AT 110 PM NATIONAL WEATHER SERVICE RADAR IN SLIDEL INDICATED A SEVERE THUNDERSTORM FORMING OVER SOUTH CENTRAL ST TAMMANY PARISH NEAR COVINGTON AND ABITA SPRINGS. ANOTHER THUNDERSTORM WAS LOCATED OVER MANDEVILLE EAST OF THE COUSEWAY BRIDGE. THESE STORMS ARE MOVING SOUTH AT 5 TO 10 MPH. HEAVY RAINFALL OF 2 TO 4 INCHES IS POSSIBLE ALONG WITH STRONG GUSTY WINDS AND SMALL HAIL. IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FRO>M 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, Jul 13, 11:00 AM CDT, 2 hours 11 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-141600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1100 AM CDT SUN JUL 13 1997 AREA REMAINS UNDER A RIDGE OF HIGH PRESSURE. GOOD DIFLUENT FLOW ALOFT IS OVER THE AREA. AIR MASS HAS BECOME MORE UNSTABLE. WEAK IMPULSES MOVING SOUTH DOWN THE BACK SIDE OF THE HIGH WILL ENHANCE CONVECTION. EXPECT THUNDERSTORMS TO BEGIN TO FIRE EARLY IN THE AFTERNOON. A FEW COULD REACH SEVERE LIMITS WITH WINDS AROUND 60 MPH AND SMALL HAIL. THE ACTIVITY SHOULD BEGIN TO DECREASE DURING THE LATE AFTERNOON EARLY EVENING HOURS. MOVEMENT OF STORMS WILL GENERALLY BE SOUTHERLY AT 10 MPH OR LESS. THIS COULD RESULT IN LOCALLY HEAVY RAINFALL UNDER THE HEAVIER STORMS.
Special weather statement, Jul 13, 12:25 PM CDT, 46 minutes before
LAZ034>040-046>049-056>070-MSZ068>071-080>082-141600- THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE NEW ORLEANS/BATON ROUGE LA 1100 AM CDT SUN JUL 13 1997 AREA REMAINS UNDER A RIDGE OF HIGH PRESSURE. GOOD DIFLUENT FLOW ALOFT IS OVER THE AREA. AIR MASS HAS BECOME MORE UNSTABLE. WEAK IMPULSES MOVING SOUTH DOWN THE BACK SIDE OF THE HIGH WILL ENHANCE CONVECTION. EXPECT THUNDERSTORMS TO BEGIN TO FIRE EARLY IN THE AFTERNOON. A FEW COULD REACH SEVERE LIMITS WITH WINDS AROUND 60 MPH AND SMALL HAIL. THE ACTIVITY SHOULD BEGIN TO DECREASE DURING THE LATE AFTERNOON EARLY EVENING HOURS. MOVEMENT OF STORMS WILL GENERALLY BE SOUTHERLY AT 10 MPH OR LESS. THIS COULD RESULT IN LOCALLY HEAVY RAINFALL UNDER THE HEAVIER STORMS.
The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 12:44 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Plaquemines | 61 min |
| Jul 13, 1:48 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Lafourche, Plaquemines | 57 min |
| Jul 13, 2:20 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 55 min |
| Jul 13, 2:53 PM CDT | Severe Thunderstorm Warning | LIX | Jefferson, Plaquemines | 67 min |
| Jul 13, 3:11 PM CDT | Severe Thunderstorm Warning | LIX | Washington | 64 min |
| Jul 13, 3:22 PM CDT | Severe Thunderstorm Warning | LIX | East Baton Rouge | 68 min |
| Jul 13, 3:45 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa | 60 min |
| Jul 13, 4:08 PM CDT | Severe Thunderstorm Warning | LIX | Ascension, Livingston | 52 min |
| Jul 13, 4:17 PM CDT | Severe Thunderstorm Warning | LIX | Lafourche, Terrebonne | 43 min |
| Jul 13, 4:23 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 52 min |
| Jul 13, 4:58 PM CDT | Severe Thunderstorm Warning | LIX | Iberville | 47 min |
| Jul 13, 5:10 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 50 min |
| Jul 13, 5:27 PM CDT | Severe Thunderstorm Warning | LIX | Tangipahoa, Washington | 48 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; the sounding from the Mesonet's radiosonde archive.