Alert archive / Arkansas / Tornado Warnings in 2018

Tornado Warning 4, NWS Tulsa, OK

March 27, 2018Crawford County, Sebastian County, Arkansas

NWS Tulsa, OK issued this tornado warning at Mar 27, 2018, 9:45 AM CDT for Crawford County, Sebastian County, Arkansas. It was in force for 14 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: Mar 27, 2018, 9:45 AM CDT (14:45 UTC)
Expired: Mar 27, 2018, 9:59 AM CDT
In force: 14 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

Counties Crawford County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 7 km from the middle of the area, began a volume at 14:45 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
Mar 27, 9:50 AM CDT	TSTM WND DMG	6 S Fort Smith, AR	SEVERAL TREES DAMAGED, LIMBS SNAPPED. TIME ESTIMATED BASED ON RADAR.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.8 hours before the alert went out and 184 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 617 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: -16 m²/s²
0-3 km storm-relative helicity: -58 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

904 
WFUS54 KTSA 271445
TORTSA
ARC033-131-271515-
/O.NEW.KTSA.TO.W.0004.180327T1445Z-180327T1515Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Tulsa OK
945 AM CDT TUE MAR 27 2018

The National Weather Service in Tulsa has issued a

* Tornado Warning for...
  South central Crawford County in northwestern Arkansas...
  Northern Sebastian County in west central Arkansas...

* Until 1015 AM CDT
    
* At 945 AM CDT, a severe thunderstorm capable of producing a tornado
  was located 3 miles northeast of Bonanza, moving east at 30 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. 

* Locations in or near the path include...
  Fort Smith...                     Greenwood...
  Barling...                        Lavaca...
  Bloomer...                        Jenny Lind...
  Central City...                   Rye Hill...

This includes Interstate 540 between mile markers 13 and 14.
 
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 3525 9441 3531 9442 3544 9412 3521 9409
TIME...MOT...LOC 1445Z 264DEG 27KT 3528 9439 

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

$$

2 follow-up statements

276 
WWUS54 KTSA 271453
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
953 AM CDT TUE MAR 27 2018

ARC033-131-271515-
/O.CON.KTSA.TO.W.0004.000000T0000Z-180327T1515Z/
Crawford AR-Sebastian AR-
953 AM CDT TUE MAR 27 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 AM CDT FOR SOUTH
CENTRAL CRAWFORD AND NORTHERN SEBASTIAN COUNTIES...
    
At 953 AM CDT, a severe thunderstorm capable of producing a tornado
was located near Barling, moving east at 30 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. 

Locations in or near the path include...
Fort Smith...                     Barling...
Lavaca...                         Bloomer...
Central City...                   

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 3526 9435 3533 9438 3544 9412 3527 9410
TIME...MOT...LOC 1453Z 258DEG 25KT 3530 9434 

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

$$

Lacy

481 
WWUS54 KTSA 271459
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
959 AM CDT TUE MAR 27 2018

ARC033-131-271508-
/O.CAN.KTSA.TO.W.0004.000000T0000Z-180327T1515Z/
Crawford AR-Sebastian AR-
959 AM CDT TUE MAR 27 2018

...THE TORNADO WARNING FOR SOUTH CENTRAL CRAWFORD AND NORTHERN
SEBASTIAN COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened, and no longer 
appears capable of producing a tornado. Therefore the warning has 
been cancelled.  However gusty winds are still possible with this 
thunderstorm.

Remember, a Severe Thunderstorm Warning still remains in effect for
northern Sebastian county until 1015 AM.

LAT...LON 3526 9435 3533 9438 3544 9412 3527 9410
TIME...MOT...LOC 1457Z 264DEG 27KT 3530 9429 

$$

Lacy

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 27, 8:53 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Madison, Washington	8 hr
Mar 27, 9:22 AM CDT	Special Weather Statement	TSA	Crawford, Sebastian	23 min
Mar 27, 9:30 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin, Sebastian	8 hr
Mar 27, 9:40 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	35 min
Mar 27, 10:04 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	26 min
Mar 27, 10:14 AM CDT	Areal Flood Advisory	TSA	Benton, Carroll	7 hr
Mar 27, 10:26 AM CDT	Severe Thunderstorm Warning	TSA	Franklin	34 min
Mar 27, 1:40 PM CDT	Areal Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	24 hr
Mar 27, 2:56 PM CDT	River Flood Advisory	TSA	Crawford	19 hr

Nearby

Tornado Warnings in Arkansas, 2018 Every tornado warning in 2018 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.