Alert archive / Louisiana / Special Weather Statements in 2020
Special Weather Statement, NWS Lake Charles, LA
NWS Lake Charles, LA issued this special weather statement at Aug 4, 2020, 4:00 PM CDT for Calcasieu Parish, Louisiana. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 4, 2020, 4:00 PM CDT (21:00 UTC)
- Expired
- Aug 4, 2020, 4:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Lake Charles, LA
County Calcasieu Parish, LA
The radar
The Lake Charles radar (KLCH), 12 km from the middle of the area, began a volume at 21:01 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 9.0 hours before the alert went out and 13 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
- 2057 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 819 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Aug 4, 3:52 PM CDT, 8 minutes earlier.
Area forecast discussion, Aug 4, 3:52 PM CDT, 8 minutes before
Area Forecast Discussion National Weather Service Lake Charles LA 352 PM CDT Tue Aug 4 2020 .SYNOPSIS... Latest UA analysis shows the large scale trough over the eastern CONUS, with the main trough axis extending fm the Great Lakes to the lower MS Valley along the Gulf Coast. While some drier air aloft has spread over the region in the wake of the trough, GOES TPW imagery shows deeper moisture (PWAT near 1.9 inches) concentrated along the upper TX coast into SW LA. At the sfc, a weak frontal boundary continues to meander acrs S LA curving northwestward acrs SE TX. This morning, lower dewpoints (in the middle 60s) penetrated south of the I-10 corridor in SW LA, but as of 20Z (3 PM), dewpoints have since rebounded back into the middle 70s near LCH, with dewpoints around 70 acrs the Acadiana region. Daytime heating, in conjunction with weak shortwave energy aloft, has initiated sctd convection in the vcnty of the boundary acrs SE TX and SW LA. 24 && .DISCUSSION... Sctd convection this aftn will gradually dissipate this evening with the loss of daytime heating. Slightly drier air and mostly clear skies for areas north of the frontal boundary will allow for sufficient radiational cooling that some areas could see low temperatures into the upper 60s, but otherwise expect lows near 70 acrs cntl LA with middle 70s elsewhere. The eastern CONUS trough will gradually begin to de-amplify on Wednesday as the Bermuda ridge builds west into the Gulf while subtropical ridging acrs the Desert SW builds east. However, nwly flow will persist acrs the region on the eastern flank of the SW ridge, sending another weak impulse over the area. At the same time, the sfc boundary will linger, more or less stationary, acrs southern LA and SE TX. Moisture will increase acrs E TX/W LA, with PWATs progged to increase to near 2.0 inches on Wednesday. This will result in a setup for convection on Wednesday, similar to today, with sctd convection expected to develop acrs SE TX and SW LA during the aftn before diminishing during the evening. A near repeat of this is expected again Thursday. The sfc boundary will gradually weaken while lifting northward on Friday as sfc high pres becomes re-established acrs the eastern Gulf. This will allow a moist return flow to develop acrs the area, with a gradual deepening of moisture over the region. Rain chcs will decrease slightly on Friday as ridging from the west builds east. However, a general weakness will persist acrs the northern Gulf coast as the ridge becomes centered acrs TX. The weakness will linger through the weekend, resulting in a return to a more typical summertime pattern of diurnally influenced convection. By early next week, shower and tstm coverage will begin to increase as the weakness aloft migrates west. Temperatures through the period are mostly expected to be near early August climatological normals, with lows in the 70s and highs in the lower to middle 90s. 24 && .MARINE... High pres acrs the NW Gulf will maintain a light and somewhat vrbl wind field the next few days. The sfc high will eventually become re-established over the eastern Gulf by the end of the week, with a light to modt onshore flow developing. No headlines are anticipated through the period. Rain chcs will remain limited through the week, with a return to more seasonal sctd convection by the weekend. 24 && .PRELIMINARY POINT TEMPS/POPS... AEX 69 91 71 93 / 0 20 0 10 LCH 74 91 75 92 / 10 40 10 30 LFT 73 92 73 93 / 10 20 0 20 BPT 75 92 76 92 / 20 40 20 30 && .LCH WATCHES/WARNINGS/ADVISORIES... LA...None. TX...None. GM...None. && PUBLIC...24
Hazardous weather outlook, Aug 4, 3:15 PM CDT, 45 minutes before
Hazardous Weather Outlook National Weather Service Lake Charles LA 315 PM CDT Tue Aug 4 2020 LAZ027>033-041>045-052>055-073-074-TXZ180-201-215-216-259>262-052015- 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- 315 PM CDT Tue Aug 4 2020 This Hazardous Weather Outlook is for central Louisiana, south central Louisiana, southwest Louisiana, west central Louisiana and southeast Texas. .DAY ONE...This afternoon and tonight. Scattered showers and thunderstorms can be expected through late afternoon, mainly south of a Woodville to Kinder to Abbeville line. The main hazards will be gusty winds and small hail with the stronger storms. In addition, storms will produce occasional cloud to ground lightning and brief heavy rainfall. Convection will dissipate this evening. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Scattered mainly afternoon showers and thunderstorms will be possible again Wednesday, with occasional cloud to ground lightning, gusty winds and brief heavy rainfall possible in the stronger storms. A daily chance of showers and thunderstorms can be expected through the remainder of the period. Convective coverage is expected to increase over the weekend and into early next week. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. GMZ430-432-435-450-452-455-470-472-475-052015- 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- 315 PM CDT Tue Aug 4 2020 This Hazardous Weather Outlook is for the Gulf of Mexico and the coastal lakes and bays of the Gulf of Mexico. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Shower and thunderstorm chances will increase over the weekend and into early next week. Winds and seas will be higher near the stronger storms, with occasional cloud to ground lightning and brief heavy rainfall also possible. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Aug 4, 3:02 PM CDT, 58 minutes before
Special Weather Statement National Weather Service Lake Charles LA 302 PM CDT Tue Aug 4 2020 TXZ180-201-261-042045- Hardin TX-Southern Jasper TX-Tyler TX- 302 PM CDT Tue Aug 4 2020 ...SPECIAL WEATHER STATEMENT... At 301 PM CDT, Doppler radar was tracking a strong thunderstorm near Caney Head, or 7 miles southwest of Fred, moving southeast at 15 mph. Half inch hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Silsbee and Caney Head. LAT...LON 3059 9430 3052 9405 3024 9410 3049 9436 TIME...MOT...LOC 2001Z 310DEG 15KT 3052 9427 25
Special weather statement, Aug 4, 4:00 PM CDT, 0 minutes before
Special Weather Statement
National Weather Service Lake Charles LA
400 PM CDT Tue Aug 4 2020
LAZ041-073-074-042145-
West Cameron LA-Calcasieu LA-East Cameron LA-
400 PM CDT Tue Aug 4 2020
...SPECIAL WEATHER STATEMENT...
At 400 PM CDT, Doppler radar was tracking a strong thunderstorm over
Carlyss, or near Sulphur, moving southeast at 15 mph.
Half inch hail and winds in excess of 30 mph will be possible with
this storm.
Locations impacted include...
Lake Charles, Sulphur, Westlake, Grand Lake, Lake Charles Regional
Airport, Moss Bluff, Hackberry, Carlyss, Heberts Marina and Edgerly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3024 9351 3029 9322 3002 9307 2997 9327
3002 9327 3005 9329 3005 9333 2995 9334
2992 9348
TIME...MOT...LOC 2100Z 318DEG 11KT 3016 9334
WarthenThe office that day
Everything else NWS Lake Charles, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 4, 4:36 PM CDT | Special Weather Statement | LCH | Cameron | 24 min |
| Aug 4, 4:37 PM CDT | Severe Thunderstorm Warning | LCH | Cameron | 23 min |
| Aug 4, 4:55 PM CDT | Special Weather Statement | LCH | Cameron | 35 min |
| Aug 4, 4:57 PM CDT | Special Marine Warning | LCH | 33 min | |
| Aug 4, 5:12 PM CDT | Special Marine Warning | LCH | 48 min | |
| Aug 4, 3:02 PM CDT | Special Weather Statement | LCH | Hardin | 43 min |
| Aug 4, 5:29 PM CDT | Special Weather Statement | LCH | Jefferson | 31 min |
Nearby
Special Weather Statements in Louisiana, 2020Every special weather statement in 2020
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.