Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 77, NWS Shreveport, LA

May 28, 2017Caddo Parish, De Soto Parish, Louisiana; Panola County, Texas

NWS Shreveport, LA issued this tornado warning at May 28, 2017, 5:54 PM CDT for Caddo Parish, De Soto Parish, Louisiana; Panola County, Texas. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 28, 2017, 5:54 PM CDT (22:54 UTC)
Expired: May 28, 2017, 6:19 PM CDT
In force: 25 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Caddo Parish, LA, De Soto Parish, LA, Panola County, TX

The radar

The Shreveport radar (KSHV), 37 km from the middle of the area, began a volume at 22:55 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
May 28, 6:15 PM CDT	TSTM WND DMG	5 Nw Keachi, LA	NUMEROUS TREES AND POWERLINES DOWN NEAR THE FOUR FORKS COMMUNITY.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 28, 5:19 PM CDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Shreveport, LA (KBAD), launched 12:00Z, 10.9 hours before the alert went out and 46 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1753 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: -304 m²/s²
0-3 km storm-relative helicity: -56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

As transmitted.

764 
WFUS54 KSHV 282254
TORSHV
LAC017-031-TXC365-282345-
/O.NEW.KSHV.TO.W.0077.170528T2254Z-170528T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
554 PM CDT SUN MAY 28 2017

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  West central De Soto Parish in northwestern Louisiana...
  Southwestern Caddo Parish in northwestern Louisiana...
  Northeastern Panola County in northeastern Texas...

* Until 645 PM CDT
    
* At 554 PM CDT, a severe thunderstorm capable of producing a tornado
  was located over Deberry, or 12 miles northeast of Carthage, moving
  southeast at 50 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* This tornadic thunderstorm will remain over mainly rural areas of
  west central De Soto...southwestern Caddo Parishes in northwestern
  Louisiana and northeastern Panola Counties, including the following
  locations: Deadwood, Front and Midyett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 3227 9426 3233 9419 3222 9392 3209 9410
TIME...MOT...LOC 2254Z 315DEG 42KT 3227 9416 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

05

1 follow-up statement

689 
WWUS54 KSHV 282319
SVSSHV

Severe Weather Statement
National Weather Service Shreveport LA
619 PM CDT SUN MAY 28 2017

LAC017-031-TXC365-282329-
/O.CAN.KSHV.TO.W.0077.000000T0000Z-170528T2345Z/
De Soto LA-Caddo LA-Panola TX-
619 PM CDT SUN MAY 28 2017

...THE TORNADO WARNING FOR WEST CENTRAL DE SOTO...SOUTHWESTERN CADDO
PARISHES IN NORTHWESTERN LOUISIANA AND NORTHEASTERN PANOLA COUNTIES
IS CANCELLED...
    
The tornadic thunderstorm which prompted the warning has weakened. 
Therefore, the warning has been cancelled.

A severe thunderstorm watch remains in effect until midnight CDT for
northwestern Louisiana...and northeastern Texas.

LAT...LON 3227 9426 3233 9419 3222 9392 3209 9410
TIME...MOT...LOC 2316Z 315DEG 42KT 3206 9391 

$$

05

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 28, 8:08 AM CDT	Special Weather Statement	SHV	Jackson, Lincoln, Ouachita, Union	37 min
May 28, 9:53 AM CDT	Special Weather Statement	SHV	Bossier, Caddo, Claiborne, De Soto, Webster	37 min
May 28, 10:33 AM CDT	Special Weather Statement	SHV	Claiborne, Webster	42 min
May 28, 10:50 AM CDT	Special Weather Statement	SHV	Bossier	40 min
May 28, 11:17 AM CDT	Special Weather Statement	SHV	Webster	43 min
May 28, 1:48 PM CDT	Special Weather Statement	SHV	Caldwell	42 min
May 28, 4:53 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	67 min
May 28, 5:15 PM CDT	Severe Thunderstorm Warning	SHV	Caddo	45 min
May 28, 5:41 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	64 min
May 28, 5:46 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Claiborne, Webster	59 min
May 28, 5:52 PM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto	38 min
May 28, 6:22 PM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto, Red River, Sabine, Webster	53 min
May 28, 6:30 PM CDT	Tornado Warning	SHV	De Soto, Sabine	26 min
May 28, 6:32 PM CDT	Flash Flood Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River, Webster	3 hr
May 28, 6:40 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Sabine	50 min
May 28, 6:51 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, De Soto, Natchitoches, Red River and 3 more	54 min
May 28, 1:39 AM CDT	Special Weather Statement	SHV	Bowie	51 min
May 28, 2:05 AM CDT	Severe Thunderstorm Warning	SHV	Bowie	40 min
May 28, 2:08 AM CDT	Special Weather Statement	SHV	Red River	37 min
May 28, 2:49 AM CDT	Special Weather Statement	SHV	Bowie, Red River	41 min
May 28, 3:30 AM CDT	Special Weather Statement	SHV	Bowie, Franklin, Titus	45 min
May 28, 4:54 AM CDT	Special Weather Statement	SHV	Camp, Upshur, Wood	36 min
May 28, 6:32 AM CDT	Special Weather Statement	SHV	Bowie, Franklin, Morris, Titus	43 min
May 28, 7:19 AM CDT	Special Weather Statement	SHV	Camp, Cass, Franklin, Morris, Titus, Upshur and 1 more	41 min
May 28, 8:07 AM CDT	Special Weather Statement	SHV	Marion	38 min
May 28, 3:35 PM CDT	Special Weather Statement	SHV	Wood	40 min
May 28, 4:18 PM CDT	Special Weather Statement	SHV	Camp, Harrison, Marion, Upshur	42 min
May 28, 4:47 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee	58 min
May 28, 4:50 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Marion, Smith, Upshur	55 min
May 28, 4:58 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk	32 min
May 28, 5:11 PM CDT	Tornado Warning	SHV	Gregg, Harrison, Panola, Rusk	49 min
May 28, 5:29 PM CDT	Severe Thunderstorm Warning	SHV	Harrison	31 min
May 28, 5:37 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	38 min
May 28, 6:48 PM CDT	Flash Flood Warning	SHV	Angelina, Cherokee, Nacogdoches, Rusk	3 hr
May 28, 6:52 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	53 min

Nearby

Tornado Warnings in Louisiana, 2017 Tornado Warnings in Texas, 2017 Every tornado warning in 2017 Tornadoes in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.