Alert archive / Louisiana / Special Weather Statements in 2018
Special Weather Statement, NWS Shreveport, LA
NWS Shreveport, LA issued this special weather statement at Aug 7, 2018, 5:03 PM CDT for Bossier Parish, Caddo Parish, Louisiana. It was in force for 42 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 7, 2018, 5:03 PM CDT (22:03 UTC)
- Expired
- Aug 7, 2018, 5:45 PM CDT
- In force
- 42 min
- Issued by
- NWS Shreveport, LA
Counties Bossier Parish, LA, Caddo Parish, LA
The radar
The Shreveport radar (KSHV), 35 km from the middle of the area, began a volume at 22:07 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, 10.1 hours before the alert went out and 30 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
- 432 J/kg
- Mixed-layer CIN
- -109 J/kg
- Mixed-layer LCL
- 1057 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- -27 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
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 Shreveport, LA wrote its last area forecast discussion before this special weather statement went out at Aug 7, 3:51 PM CDT, 1 hour 12 minutes earlier.
Area forecast discussion, Aug 7, 3:51 PM CDT, 1 hour 12 minutes before
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</html>Hazardous weather outlook, Aug 7, 11:59 AM CDT, 5 hours 4 minutes before
Hazardous Weather Outlook National Weather Service Shreveport LA 1159 AM CDT Tue Aug 7 2018 ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077- TXZ096-097-108>112-124>126-136>138-149>153-165>167-081700- Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette- Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto- Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn- Grant-Caldwell-La Salle-McCurtain-Bowie-Franklin-Titus-Camp- Morris-Cass-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-Rusk- Panola-Nacogdoches-Shelby-Angelina-San Augustine- 1159 AM CDT Tue Aug 7 2018 This Hazardous Weather Outlook is for portions of south central Arkansas, southwest Arkansas, north central Louisiana, northwest Louisiana, southeast Oklahoma, east Texas and northeast Texas. .DAY ONE...This Afternoon and Tonight... Afternoon temperatures will climb into the mid and upper 90s areawide. When combined with the humidity, our heat indices will range from 100 to 105 degrees. Isolated showers have begun to develop across Toledo Bend and portions of northern Louisiana, south of interstate 20. During peak heating, isolated to widely scattered showers and thunderstorms will spread across deep east Texas, extreme north Louisiana and South central Arkansas. Any mature thunderstorms will bring locally gusty winds and brief heavy rainfall possible. These storms will diminish early this evening with the loss of heating. However, overnight more thunderstorms will move toward the I-30 corridor as a cold front begins to push in our direction. .DAYS TWO THROUGH SEVEN...Wednesday through Monday... Scattered showers and thunderstorms may be ongoing early Wednesday across I-30. Then, the associated rain cooled outflow boundary will help to develop more activity during Wednesday afternoon area wide. Overall, coverage of showers and thunderstorms is expected to increase for us Thursday and Friday as the cool front draws near and this pattern brings back a light Northwest wind flow for a continued wet pattern with thunderstorms possible during the night time and anytime of the day. Locally gusty winds and brief heavy rainfall will be possible from the strong and mature storms each day. .SPOTTER INFORMATION STATEMENT... Activation of emergency managers, spotter networks and amateur radio operators should not be needed through tonight. 07
In the hours before
Special weather statement, Aug 7, 3:07 PM CDT, 1 hour 56 minutes before
Special Weather Statement
National Weather Service Shreveport LA
307 PM CDT TUE AUG 7 2018
LAZ017>019-072100-
Winn LA-Natchitoches LA-Sabine LA-
307 PM CDT TUE AUG 7 2018
...SIGNIFICANT WEATHER ADVISORY FOR NATCHITOCHES...NORTHERN SABINE
AND WESTERN WINN PARISHES UNTIL 400 PM CDT...
At 306 PM CDT, Doppler radar was tracking a strong thunderstorm 11
miles southwest of Natchitoches, moving northeast at 20 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Natchitoches, Many, Zwolle, Campti, Montgomery, Allen, Oak Grove,
Pleasant Hill, Provencal, Natchez, Clarence, Goldonna, Noble,
Robeline, Powhatan, Melrose, Belmont, Bellwood, St. Maurice and
Chestnut.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3172 9377 3185 9351 3184 9344 3188 9344
3192 9335 3189 9334 3189 9327 3191 9324
3197 9324 3197 9313 3202 9316 3215 9287
3214 9283 3171 9277 3171 9296 3168 9296
3166 9290 3162 9290 3160 9284 3147 9331
TIME...MOT...LOC 2006Z 224DEG 41KT 3166 9326
07Special weather statement, Aug 7, 5:03 PM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 6, 7:18 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Winn | 57 min |
| Aug 6, 7:44 PM CDT | Special Weather Statement | SHV | Ouachita | 46 min |
| Aug 7, 3:07 PM CDT | Special Weather Statement | SHV | Natchitoches | 53 min |
Nearby
Special Weather Statements in Louisiana, 2018Every special weather statement in 2018
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.