Alert archive / Louisiana / Severe Thunderstorm Warnings in 2019
Severe Thunderstorm Warning 99, NWS New Orleans, LA
NWS New Orleans, LA issued this severe thunderstorm warning at Jun 7, 2019, 9:33 AM CDT for Assumption Parish, Lafourche Parish, Saint James Parish, Louisiana. It was in force for 27 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 7, 2019, 9:33 AM CDT (14:33 UTC)
- Expired
- Jun 7, 2019, 10:00 AM CDT
- In force
- 27 min
- Issued by
- NWS New Orleans, LA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Assumption Parish, LA, Lafourche Parish, LA, Saint James Parish, LA
The nearest sounding before it
Slidell Radar S, LA (KSIL), launched 12:00Z, 2.6 hours before the alert went out and 113 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
- 2462 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 616 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 102 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.8
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 7, 4:18 AM CDT, 5 hours 15 minutes earlier.
Area forecast discussion, Jun 7, 4:18 AM CDT, 5 hours 15 minutes before
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Hazardous Weather Outlook National Weather Service New Orleans LA 552 AM CDT Fri Jun 7 2019 GMZ530-532-534-536-538-550-552-555-557-570-572-575-577-LAZ034>037- 039-040-046>050-056>072-MSZ068>071-077-080>082-072300- Lake Pontchartrain and Lake Maurepas-Mississippi Sound- Lake Borgne-Chandeleur Sound-Breton Sound- Coastal Waters from Port Fourchon LA to Lower Atchafalaya River LA out 20 nm- Coastal waters from the Southwest Pass of the Mississippi River to Port Fourchon Louisiana out 20 NM- Coastal Waters from Boothville LA to Southwest Pass of the Mississippi River out 20 nm- Coastal waters from Pascagoula Mississippi to Stake Island out 20 NM- Coastal waters from Port Fourchon Louisiana to Lower Atchafalaya River LA from 20 to 60 NM- Coastal waters from Southwest Pass of the Mississippi River to Port Fourchon Louisiana from 20 to 60 NM- Coastal Waters from Stake Island LA to Southwest Pass of the Mississippi River from 20 to 60 nm- Coastal waters from Pascagoula Mississippi to Stake Island Louisiana out 20 to 60 NM-Pointe Coupee-West Feliciana- East Feliciana-St. Helena-Washington-St. Tammany-Iberville- West Baton Rouge-East Baton Rouge-Ascension-Livingston-Assumption- St. James-St. John The Baptist-Upper Lafourche-St. Charles- Upper Jefferson-Orleans-Upper Plaquemines-Upper St. Bernard- Upper Terrebonne-Lower Terrebonne-Lower Lafourche-Lower Jefferson- Lower Plaquemines-Lower St. Bernard-Northern Tangipahoa- Southern Tangipahoa-Wilkinson-Amite-Pike-Walthall-Pearl River- Hancock-Harrison-Jackson- 552 AM CDT Fri Jun 7 2019 This Hazardous Weather Outlook is for portions of Southeast Louisiana...South Mississippi and the adjacent coastal waters. .DAY ONE...Today and Tonight There is a slight risk of excessive rainfall today. Although widespread flooding is not expected, isolated flooding of low lying and poor drainage areas will be possible. There is a marginal risk of severe thunderstorms today. Damaging winds, large hail, frequent lightning and isolated an tornado will be possible. Tide levels will remain elevated and may be up to some secondary roadways, but conditions are not expected to cause any large scale negative impacts. .DAYS TWO THROUGH SEVEN...Saturday through Thursday The risk of widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated.
In the hours before
Special weather statement, Jun 7, 9:26 AM CDT, 7 minutes before
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</html>The office that day
Everything else NWS New Orleans, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 7, 9:26 AM CDT | Special Weather Statement | LIX | Assumption | 49 min |
| Jun 7, 9:44 AM CDT | Special Weather Statement | LIX | Tangipahoa | 61 min |
| Jun 7, 10:12 AM CDT | Special Weather Statement | LIX | Saint Tammany | 63 min |
| Jun 7, 10:20 AM CDT | Special Weather Statement | LIX | Lafourche | 55 min |
| Jun 7, 10:27 AM CDT | Special Marine Warning | LIX | 2 hr | |
| Jun 7, 11:50 AM CDT | Special Marine Warning | LIX | 115 min | |
| Jun 7, 12:33 PM CDT | Special Marine Warning | LIX | 57 min | |
| Jun 7, 2:14 PM CDT | Special Weather Statement | LIX | Tangipahoa, Washington | 61 min |
| Jun 7, 2:20 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany, Tangipahoa, Washington | 25 min |
| Jun 7, 3:05 PM CDT | Special Marine Warning | LIX | 115 min | |
| Jun 7, 4:01 PM CDT | Special Weather Statement | LIX | West Feliciana | 59 min |
| Jun 7, 4:07 PM CDT | Special Weather Statement | LIX | Jefferson | 53 min |
| Jun 7, 5:11 PM CDT | Special Weather Statement | LIX | East Feliciana, Saint Helena | 64 min |
| Jun 7, 5:22 PM CDT | Special Marine Warning | LIX | 83 min | |
| Jun 7, 6:23 PM CDT | Special Marine Warning | LIX | 97 min | |
| Jun 7, 6:40 PM CDT | Special Weather Statement | LIX | Washington | 65 min |
| Jun 7, 9:45 AM CDT | Special Weather Statement | LIX | Jackson | 45 min |
| Jun 7, 10:03 AM CDT | Special Weather Statement | LIX | Pearl River | 42 min |
| Jun 7, 11:25 AM CDT | Special Weather Statement | LIX | Harrison | 65 min |
| Jun 7, 11:49 AM CDT | Severe Thunderstorm Warning | LIX | Harrison, Jackson | 56 min |
| Jun 7, 12:12 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 48 min |
| Jun 7, 12:32 PM CDT | Special Weather Statement | LIX | Jackson | 58 min |
| Jun 7, 2:59 PM CDT | Special Weather Statement | LIX | Harrison | 61 min |
| Jun 7, 3:22 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 43 min |
| Jun 7, 3:23 PM CDT | Special Weather Statement | LIX | Harrison | 67 min |
| Jun 7, 3:29 PM CDT | Severe Thunderstorm Warning | LIX | Harrison | 76 min |
| Jun 7, 3:59 PM CDT | Special Weather Statement | LIX | Amite | 61 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2019Every severe thunderstorm warning in 2019
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.