Alert archive / Louisiana / Tornado Warnings in 2017

Tornado Warning 80, NWS Shreveport, LA

May 28, 2017Grant Parish, Natchitoches Parish, Winn Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at May 28, 2017, 7:30 PM CDT for Grant Parish, Natchitoches Parish, Winn Parish, Louisiana. It was in force for 60 min. 4 reports 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, 7:30 PM CDT (00:30 UTC)
Expired: May 28, 2017, 8:30 PM CDT
In force: 60 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Grant Parish, LA, Natchitoches Parish, LA, Winn Parish, LA

The radar

The Ft Polk radar (KPOE), 73 km from the middle of the area, began a volume at 00:33 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, 7:50 PM CDT	TSTM WND DMG	2 Nw Natchitoches, LA	SIGNIFICANT TREE AND POWER LINE DAMAGE ALONG LA HWY 3191 AT MONROE DRIVE JUST WEST OF NATCHITOCHES.
May 28, 7:50 PM CDT	TSTM WND DMG	Natchitoches, LA	TREES ON HOMES ON LOREN AVE AND FIFTH STREET; TREES SNAPPED OR UPROOTED ON NSU CAMPUS AT TARLTON DRIVE AND CHAPLINS, TREE DOWN EAST FIFTH ST; LARGE TREE DOWN ON LOT AT ST. CLAIR AND WILLIAMS AV; POWER LINES DOWN ON HARLING LANE, TREE DAMAGE AND LIMBS DOWN ACRO
May 28, 7:55 PM CDT	TSTM WND GST 60	1 S Natchitoches, LA	REPORTED AT NATCHITOCHES REGIONAL AIRPORT AWOS.
May 28, 8:07 PM CDT	TORNADO	5 Sse Calvin, LA	A BRIEF EF1 TORNADO MOVED FROM NW TO SE ACROSS US HWY 84 WEST OF WINNFIELD. NUMEROUS TREES WERE SNAPPED AND UPROOTED.

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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 0.5 hours before the alert went out and 187 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: 2055 J/kg
Mixed-layer CIN: -72 J/kg
Mixed-layer LCL: 992 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 27 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted.

897 
WFUS54 KSHV 290030
TORSHV
LAC043-069-127-290130-
/O.NEW.KSHV.TO.W.0080.170529T0030Z-170529T0130Z/

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

The National Weather Service in Shreveport has issued a

* Tornado Warning for...
  West central Grant Parish in north central Louisiana...
  Central Natchitoches Parish in northwestern Louisiana...
  Southwestern Winn Parish in north central Louisiana...

* Until 830 PM CDT
    
* At 730 PM CDT, a severe thunderstorm capable of producing a tornado
  was located near Campti, or near Natchitoches, moving east at 50
  mph.

  HAZARD...Tornado and quarter size hail. 

  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 dangerous storm will be near...
  Montgomery around 750 PM CDT. 

Other locations impacted by this tornadic thunderstorm include
Melrose, Robeline, Provencal, Grand Ecore, Natchez, St. Maurice,
Clarence, Joyce, Flora and Atlanta.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3165 9333 3191 9325 3191 9324 3197 9323
      3195 9257 3156 9272
TIME...MOT...LOC 0030Z 290DEG 43KT 3183 9312 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

06

1 follow-up statement

764 
WWUS54 KSHV 290113
SVSSHV

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

LAC043-069-127-290130-
/O.CON.KSHV.TO.W.0080.000000T0000Z-170529T0130Z/
Grant LA-Natchitoches LA-Winn LA-
813 PM CDT SUN MAY 28 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR WEST
CENTRAL GRANT...EAST CENTRAL NATCHITOCHES AND SOUTHWESTERN WINN
PARISHES...
    
At 811 PM CDT, a severe thunderstorm capable of producing a tornado
was located over Montgomery, or 14 miles east of Natchitoches, moving
east at 35 mph.

HAZARD...Tornado and quarter size hail. 

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 Grant...east central Natchitoches and southwestern Winn
Parishes, including the following locations: Joyce, Aloha, Atlanta
and Calvin.

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.

Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!

&&

LAT...LON 3161 9302 3180 9290 3187 9282 3196 9282
      3195 9257 3156 9272
TIME...MOT...LOC 0111Z 284DEG 32KT 3168 9287 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

06

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:02 PM CDT	Flash Flood Warning	SHV	De Soto, Red River, Sabine	3 hr
May 28, 7:09 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	51 min
May 28, 7:24 PM CDT	Tornado Warning	SHV	Natchitoches, Sabine	51 min
May 28, 7:43 PM CDT	Severe Thunderstorm Warning	SHV	Bienville, Grant, Jackson, Natchitoches, Winn	62 min
May 28, 8:00 PM CDT	Flash Flood Warning	SHV	Bienville, Bossier, Claiborne, De Soto, Jackson, Lincoln and 6 more	3 hr
May 28, 8:05 PM CDT	Tornado Warning	SHV	Winn	40 min
May 28, 8:18 PM CDT	Tornado Warning	SHV	Grant, Natchitoches	44 min
May 28, 8:30 PM CDT	Tornado Warning	SHV	Caldwell, Grant, LaSalle, Winn	45 min
May 28, 8:39 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, Jackson, LaSalle, Natchitoches, Ouachita and 1 more	66 min

Nearby

Tornado Warnings in Louisiana, 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.