Alert archive / Louisiana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 28, NWS Lake Charles, LA
NWS Lake Charles, LA issued this severe thunderstorm warning at Mar 12, 2001, 7:45 AM CST for Evangeline Parish, Saint Landry Parish, Louisiana. It was in force for 60 min. 2 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Mar 12, 2001, 7:45 AM CST (13:45 UTC)
- Expired
- Mar 12, 2001, 8:45 AM CST
- In force
- 60 min
- Issued by
- NWS Lake Charles, LA
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Evangeline Parish, LA, Saint Landry Parish, LA
The radar
The Ft Polk radar (KPOE), 100 km from the middle of the area, began a volume at 13:45 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 12, 7:59 AM CST | Hail 0.75 | Chataignier, LA | |
| Mar 12, 8:06 AM CST | Thunderstorm Wind | Innis, LA | Several trees were blown down. |
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 |
|---|---|---|---|
| Mar 12, 5:00 AM CST | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 1.8 hours before the alert went out and 118 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
- 1938 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 574 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KLCH 121345 SVRLCH LAC039-097-121445- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LAKE CHARLES LA 745 AM CST MON MAR 12 2001 THE NATIONAL WEATHER SERVICE IN LAKE CHARLES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EVANGELINE PARISH IN CENTRAL LOUISIANA ST. LANDRY PARISH IN CENTRAL LOUISIANA * UNTIL 845 AM CST * AT 737 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 16 MILES SOUTH OF MAMOU...MOVING NORTHEAST AT 40 MPH. * THIS STORM WILL BE NEAR... CHATAIGNIER BY 755 AM CST LAWTELL BY 805 AM CST OPELOUSAS BY 810 AM CST WASHINGTON BY 815 AM CST PALMETTO BY 830 AM CST SEVERE THUNDERSTORMS PRODUCE WINDS IN EXCESS OF 60 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND TORRENTIAL RAIN. CALL 337-477-5285 TO REPORT SEVERE WEATHER TO THE WEATHER SERVICE. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 AM CST MONDAY MORNING FOR SOUTHWESTERN LOUISIANA AND SOUTHEAST TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN EFFECT UNTIL 1100 AM CST MONDAY MORNING FOR SOUTH CENTRAL LOUISIANA. LAT...LON 3057 9259 3048 9221 3065 9156 3090 9169 )
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 Mar 12, 2:36 AM CST, 5 hours 9 minutes earlier.
Area forecast discussion, Mar 12, 2:36 AM CST, 5 hours 9 minutes before
SOUTHEAST TEXAS AND SOUTHWEST LOUISIANA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LAKE CHARLES LA 236 AM CST MON MAR 12 2001 AREA ON THE FRINGE OF SEVERE WEATHER THIS MORNING WITH A SEVERE THUNDERSTORM WATCHES IN EFFECT UNTIL 12Z FOR PORTIONS OF SOUTHEAST TEXAS AND ANOTHER SEVERE THUNDERSTORM WATCH IN EFFECT UNTIL 12Z FOR EXTREME SOUTH-CENTRAL LOUISIANA. SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP OVER SOUTH-CENTRAL LOUISIANA... MAINLY DUE TO SOME LOW LEVEL SPEED AND DIRECTIONAL CONVERGENCE AND A DIFFLUENT PATTERN ALOFT. HOWEVER...THE AREA I AM MOST CONCERNED ABOUT IS THE WATCH TO THE WEST. CURRENTLY THERE IS A LINE OF STRONG TO SEVERE THUNDERSTORMS THAT EXTENDS FROM DALLAS TO SAN ANTONIO. THIS LINE OF THUNDERSTORMS SHOULD BE MOVING INTO EXTREME SOUTHEAST TEXAS BY 12Z. COULD ALSO SEE SOME THUNDERSTORMS DEVELOP OUT AHEAD OF THIS LINE SINCE THE AIRMASS IS ALREADY FAIRLY UNSTABLE WITH LI VALUES OF -4 TO -7 AND SBCAPE OF 1000 TO 1500 J/KG. THE AIRMASS WILL BECOME EVEN MORE UNSTABLE AS THE DAY WEARS ON AS STEEPER MID LEVEL LAPSE RATE AIR MOVES INTO THE AREA. WOULD EXPECT SEVERE WEATHER TO BE POSSIBLE ACROSS THE AREA THROUGH THE MID AFTERNOON HOURS. THE COLD FRONT ASSOCIATED WITH THE 500 MB LOW THAT IS MOVING ACROSS THE PLAINS WILL PUSH THROUGH THE AREA THIS EVENING AND ESSENTIALLY PUTTING AND END TO THE PRECIPITATION. THE NEXT CHANCE OF SHOWERS AND THUNDERSTORMS WILL BE ON WEDNESDAY NIGHT AND THURSDAY AS THE NEXT SYSTEM APPROACHES THE AREA. WILL ONCE AGAIN GO WITH A BLEND OF AVN AND NGM MOS TEMPS. 10 .LCH...NONE. PRELIM NUMBERS... AEX 75/51/72/47 8200 BPT 77/54/74/53 8200 LCH 76/54/74/52 8200 LFT 78/57/73/52 >8200
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 12, 4:18 AM CST | Severe Thunderstorm Warning | LCH | Rapides | 42 min |
| Mar 12, 8:04 AM CST | Severe Thunderstorm Warning | LCH | Allen, Calcasieu, Jefferson Davis | 56 min |
| Mar 12, 9:28 AM CST | Severe Thunderstorm Warning | LCH | Jefferson Davis | 32 min |
Nearby
Severe Thunderstorm Warnings in Louisiana, 2001Every severe thunderstorm warning in 2001
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; radar from the NEXRAD Level II archive.