Alert archive / Arkansas / Tornado Warnings in 2017

Tornado Warning 23, NWS Jackson, MS

January 21, 2017Ashley County, Chicot County, Arkansas

NWS Jackson, MS issued this tornado warning at Jan 21, 2017, 8:54 PM CST for Ashley County, Chicot County, Arkansas. It was in force for 53 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: Jan 21, 2017, 8:54 PM CST (02:54 UTC)
Expired: Jan 21, 2017, 9:47 PM CST
In force: 53 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

Counties Ashley County, AR, Chicot County, AR

The radar

The Little Rock radar (KLZK), 182 km from the middle of the area, began a volume at 02:54 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
Jan 21, 9:14 PM CST	TSTM WND DMG	Montrose, AR	SEVERAL TREES DOWN ACROSS TOWN, ONE ACROSS THE RAILROAD TRACK AND SOME POWER LINES DOWN.

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
Jan 21, 7:50 PM CST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 2.9 hours before the alert went out and 179 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: 1036 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 1052 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

126 
WFUS54 KJAN 220254
TORJAN
ARC003-017-220400-
/O.NEW.KJAN.TO.W.0023.170122T0254Z-170122T0400Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Jackson MS
854 PM CST SAT JAN 21 2017

The National Weather Service in Jackson has issued a

* Tornado Warning for...
  Southwestern Chicot County in southeastern Arkansas...
  Ashley County in southeastern Arkansas...

* Until 1000 PM CST
    
* At 854 PM CST, a severe thunderstorm capable of producing a tornado
  was located near Hamburg, moving east at 30 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...
  Snyder around 905 PM CST. 
  Portland around 915 PM CST. 
  Montrose around 920 PM CST. 

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 3338 9178 3339 9158 3339 9146 3340 9146
      3340 9144 3301 9145 3301 9192
TIME...MOT...LOC 0254Z 254DEG 28KT 3325 9172 

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

$$

CME

2 follow-up statements

028 
WWUS54 KJAN 220311
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
911 PM CST SAT JAN 21 2017

ARC003-017-220400-
/O.CON.KJAN.TO.W.0023.000000T0000Z-170122T0400Z/
Chicot AR-Ashley AR-
911 PM CST SAT JAN 21 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CST FOR
SOUTHWESTERN CHICOT AND EASTERN ASHLEY COUNTIES...
    
At 911 PM CST, a severe thunderstorm capable of producing a tornado
was located over Montrose, or 13 miles west of Lake Village, 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
southwestern Chicot and eastern Ashley Counties.

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 3338 9169 3339 9158 3339 9146 3340 9146
      3340 9144 3301 9145 3301 9180 3329 9169
TIME...MOT...LOC 0311Z 255DEG 31KT 3329 9152 

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

$$

CME

203 
WWUS54 KJAN 220347
SVSJAN

Severe Weather Statement
National Weather Service Jackson MS
947 PM CST SAT JAN 21 2017

ARC003-017-220356-
/O.CAN.KJAN.TO.W.0023.000000T0000Z-170122T0400Z/
Chicot AR-Ashley AR-
947 PM CST SAT JAN 21 2017

...THE TORNADO WARNING FOR SOUTHWESTERN CHICOT AND EASTERN ASHLEY
COUNTIES IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning has been cancelled.

A tornado watch remains in effect until 300 AM CST for southeastern
Arkansas.

LAT...LON 3338 9169 3339 9158 3339 9146 3340 9146
      3340 9144 3301 9145 3301 9180 3329 9169
TIME...MOT...LOC 0343Z 254DEG 28KT 3337 9120 

$$

CME

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 21, 7:55 PM CST	Tornado Warning	JAN	Ashley	65 min
Jan 21, 9:20 PM CST	Severe Thunderstorm Warning	JAN	Chicot	55 min
Jan 21, 9:38 PM CST	Severe Thunderstorm Warning	JAN	Chicot	67 min
Jan 22, 5:18 AM CST	Wind Advisory	JAN	Ashley, Chicot	22 hr

Nearby

Tornado Warnings in Arkansas, 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.