Alert archive / Louisiana / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 113, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Apr 18, 1998, 9:31 AM CDT for Saint Martin Parish, Louisiana. It was in force for 19 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
- Apr 18, 1998, 9:31 AM CDT (14:31 UTC)
- Expired
- Apr 18, 1998, 9:50 AM CDT
- In force
- 19 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties
County Saint Martin Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 18, 9:40 AM CDT | Hail 1.25 | Parks, 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 2.5 hours before the alert went out and 153 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 542 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- -139 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
954 WUUS1 KLCH 181433 RRA SVRLCH LAC099-181450- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 931 AM CDT SAT APR 18 1998 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... UPPER ST. MARTIN PARISH IN SOUTH CENTRAL LOUISIANA * UNTIL 950 AM CDT * AT 928 AM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES NORTHWEST OF ST. MARTINVILLE OR 4 MILES SOUTH OF BREAUX BRIDGE MOVING NORTHEAST AT 50 MPH. * THIS STORM CAN BE EXPECTED NEAR... PARKS BY 932 AM CDT CECILIA BY 935 AM CDT HENDERSON BY 935 AM CDT CATAHOULA BY 940 AM CDT THIS STORM IS CAPABLE OF PRODUCING 1 INCH HAIL. THIS THUNDERSTORM IS CAPABLE OF PRODUCING EXTREMELY LARGE HAIL WHICH MAY CAUSE SEVERE DAMAGE TO PROPERTY AND SERIOUS INJURY TO PEOPLE AND LIVESTOCK. DAMAGING WINDS AND TORRENTIAL RAIN ARE ALSO LIKELY WITH THIS STORM. MOVE TO A STURDY BUILDING AND STAY AWAY FROM WINDOWS DSW
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 Lake Charles, LA wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 18, 2:10 AM CDT, 7 hours 21 minutes earlier.
Area forecast discussion, Apr 18, 2:10 AM CDT, 7 hours 21 minutes before
SOUTHEAST TEXAS..SOUTHWEST AND CENTRAL LOUISIANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 210 AM CDT SAT APR 18 1998 WIDESPREAD RAIN EVENT SETTING UP FOR SOUTHEAST TEXAS / LOUISIANA. CONVECTION STARTING TO INTENSIFY OVER CENTRAL LA IN RESPONSE TO INCREASING UPPER LEVEL JET. LATEST 06Z LCH SOUNDING COURTESY OF TRMM PROJECT SHOWING UNSTABLE LAYER FROM 850 UP...WITH ELEVATED CAPE VALUES AROUND 1000 J/KG AND LI AT -4. UPPER LEVEL TROUGH WILL CONTINUE TO MOVE EASTWARD TODAY...SETTING UP GOOD RIGHT REAR QUAD / COUPLED JET ACROSS REGION WITH GOOD DIVERGENCE AT 18Z. BOUNDRY WILL MOVE A LITTLE FURTHER NW BEFORE SFC WAVE DEVELOPS...INTENSIFYING OVER NORTHERN AL. THIS WILL SWEEP COLD FRONT EAST ALONG GULF COAST STATES. SHOULD SEE WIDESPREAD ONE TO TWO INCH TOTALS WITH LOCALLY THREE INCHES POSSIBLE...ESPECIALLY OVER CENTRAL LA. SHOULDNT BE A FLOODING THREAT...GIVEN HIGH FFG NUMBERS AND SPEED OF SYSTEM. BY 00Z TONIGHT UPPER LEVEL TROUGH BEGINS TO PUSH EAST OF THE AREA WITH DRYING / GOOD SUBSIDENCE IN THE MID LAYERS. SHOULD HAVE DECREASING CLOUDS SAT NIGHT...BECOMING MOSTLY SUNNY OVER SOUTHEAST TEXAS / SW LA ON SUN. STAYED CLOSE TO MOS TEMPS. 12 BPT 66/53/77 +00 LCH 66/53/75 +10 LFT 67/58/74 +50 AEX 57/50/70 +20
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 9:09 AM CDT | Severe Thunderstorm Warning | LCH | Lafayette | 31 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 1998Every severe thunderstorm warning in 1998
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.