Alert archive / Louisiana / Flash Flood Watches in 2015
Flash Flood Watch 1, NWS Lake Charles, LA
NWS Lake Charles, LA issued this flash flood watch at Mar 9, 2015, 3:00 PM CDT for 10 parishes in Louisiana; 4 counties in Texas. It took effect at Mar 9, 2015, 7:00 PM CDT. It was in force for 34 hr.
The area
The counties it named.
The facts
- Issued
- Mar 9, 2015, 3:00 PM CDT (20:00 UTC)
- In effect from
- Mar 9, 2015, 7:00 PM CDT
- Expired
- Mar 11, 2015, 4:48 AM CDT
- In force
- 34 hr
- Issued by
- NWS Lake Charles, LA
- Flood severity
- None
Counties Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Cameron Parish, LA, Evangeline Parish, LA, Lafayette Parish, LA, Rapides Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Vernon Parish, LA, Hardin County, TX, Jasper County, TX, Newton County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 58 km from the middle of the area, began a volume at 20:00 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.
The nearest sounding before it
Shreveport, LA (KBAD), launched 12:00Z, 8.0 hours before the alert went out and 218 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
- 443 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 205 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Mar 9, 12:53 PM CDT, 2 hours 7 minutes earlier.
Area forecast discussion, Mar 9, 12:53 PM CDT, 2 hours 7 minutes before
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</html>Hazardous weather outlook, Mar 9, 6:02 AM CDT, 8 hours 58 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LAKE CHARLES LA 602 AM CDT MON MAR 9 2015 LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262- 101115- VERNON-RAPIDES-AVOYELLES-BEAUREGARD-ALLEN-EVANGELINE-ST. LANDRY- CALCASIEU-JEFFERSON DAVIS-ACADIA-LAFAYETTE-UPPER ST. MARTIN- VERMILION-IBERIA-ST. MARY-LOWER ST. MARTIN-WEST CAMERON- EAST CAMERON-TYLER-HARDIN-JEFFERSON-ORANGE-NORTHERN JASPER- NORTHERN NEWTON-SOUTHERN JASPER-SOUTHERN NEWTON- 602 AM CDT MON MAR 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL LOUISIANA...SOUTH CENTRAL LOUISIANA...SOUTHWEST LOUISIANA...WEST CENTRAL LOUISIANA AND SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT AN UPPER LEVEL DISTURBANCE COMBINED WITH A DEVELOPING AREA OF SURFACE LOW PRESSURE OVER SOUTHEAST TEXAS WILL PRODUCE WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS ACROSS MUCH OF THE AREA TODAY. THE HEAVIEST RAINFALL IS EXPECTED ACROSS INTERIOR SOUTHEAST TEXAS...MAINLY NORTHWEST OF A SOUR LAKE TO NEWTON LINE...WHERE RAINFALL TOTALS OF ONE TO TWO INCHES IS EXPECTED. WIDESPREAD OR SIGNIFICANT FLOODING IS NOT EXPECTED AT THIS TIME...BUT SOME LOCALIZED FLOODING WILL BE POSSIBLE ESPECIALLY IN LOW LYING AND URBAN AREAS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY PERIODS OF LIGHT TO MODERATE RAIN WILL CONTINUE THROUGH THURSDAY AS THE SURFACE LOW MOVES NORTHEAST AND BRINGS A WEAK COLD FRONT THROUGH THE AREA. THE FRONT WILL BECOME STALLED ACROSS SOUTHEAST LOUISIANA AND THE NORTH CENTRAL GULF...WHILE AN UPPER TROUGH REMAINS WEST OF THE REGION...AIDING IN THE CONTINUED CHANCE FOR RAIN. AN ADDITIONAL ONE TO THREE INCHES OF RAIN CAN BE EXPECTED DURING THIS TIME...WITH THE HIGHEST RAINFALL TOTALS EXPECTED ACROSS THE ACADIANA REGION. THESE RAINFALL TOTALS COULD LEAD TO SOME FLOODING PROBLEMS ACROSS PORTIONS OF THE AREA...ESPECIALLY IF HEAVY TRAINING BANDS DEVELOP...AND A FLASH FLOOD WATCH MAY BECOME NECESSARY LATER TODAY OR TONIGHT. RAIN CHANCES WILL BEGIN TO DIMINISH BY FRIDAY WITH LOW CHANCES EXPECTED THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. GMZ430-432-435-450-452-455-470-472-475-101115- SABINE LAKE-CALCASIEU LAKE-VERMILION BAY- COASTAL WATERS FROM CAMERON LA TO HIGH ISLAND TX OUT 20 NM- COASTAL WATERS FROM INTRACOASTAL CITY TO CAMERON LA OUT 20 NM- COASTAL WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA OUT 20 NM- WATERS FROM CAMERON LA TO HIGH ISLAND TX FROM 20 TO 60 NM- WATERS FROM INTRACOASTAL CITY TO CAMERON LA FROM 20 TO 60 NM- WATERS FROM LOWER ATCHAFALAYA RIVER TO INTRACOASTAL CITY LA FROM 20 TO 60 NM- 602 AM CDT MON MAR 9 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF THE NORTHWEST GULF OF MEXICO. .DAY ONE...TODAY AND TONIGHT SHOWER CHANCES WILL INCREASE THROUGH TONIGHT AS A SURFACE LOW DEVELOPS ACROSS SOUTHEAST TEXAS. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY WIDESPREAD SHOWERS AND ISOLATED THUNDERSTORMS CAN BE EXPECTED TUESDAY...WITH SHOWERS REMAINING LIKELY THROUGH THURSDAY AS A WEAK COLD FRONT CROSSES THE COASTAL WATERS AND BECOMES STALLED OVER THE NORTH CENTRAL GULF. MODERATE EAST TO SOUTHEAST WINDS WILL SHIFT TO THE NORTHWEST LATE TUESDAY IN THE WAKE OF THE FRONT...WITH MODERATE OFFSHORE FLOW EXPECTED THROUGH THE REMAINDER OF THE WEEK. SOME STORMS WILL BE CAPABLE OF PRODUCING HEAVY RAINFALL THAT COULD REDUCE VISIBILITIES AND OCCASIONAL CLOUD TO WATER LIGHTNING. RAIN CHANCES WILL BEGIN TO DIMINISH BY FRIDAY WITH LOW CHANCES EXPECTED THROUGH THE WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED. 24
The office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 8:55 PM CDT | River Flood Warning | LCH | Beauregard, Calcasieu | 8 days |
| Mar 9, 10:58 AM CDT | River Flood Watch | LCH | Allen | 14 days |
| Mar 9, 10:58 AM CDT | River Flood Watch | LCH | Allen | 5 days |
| Mar 9, 10:58 AM CDT | River Flood Watch | LCH | 9 days | |
| Mar 9, 1:10 PM CDT | Marine Dense Fog Advisory | LCH | 30 hr | |
| Mar 9, 10:58 AM CDT | River Flood Watch | LCH | Hardin | 3 days |
Nearby
Flash Flood Watches in Louisiana, 2015Flash Flood Watches in Texas, 2015Every flash flood watch in 2015
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; radar from the NEXRAD Level II archive.