Alert archive / Arkansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Tulsa, OK

March 17, 2021Benton County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 17, 2021, 4:48 PM CDT for Benton County, Arkansas. It was in force for 27 min. 2 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: Mar 17, 2021, 4:48 PM CDT (21:48 UTC)
Expired: Mar 17, 2021, 5:15 PM CDT
In force: 27 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Benton County, AR

The radar

The Springfield radar (KSGF), 108 km from the middle of the area, began a volume at 21:50 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 17, 5:01 PM CDT	HAIL 1.25	Gateway, AR	DELAYED REPORT: STORE OWNER REPORTS HAIL UP TO 1.25 IN DIAMETER WITH HAIL COVERING THE GROUND. HAIL WAS STILL ON THE GROUND THE FOLLOWING MORNING. TIME ESTIMATED FROM RADAR.
Mar 17, 5:07 PM CDT	HAIL 1.75	Gateway, AR	RELAYED VIA SOCIAL MEDIA

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
Mar 17, 2:00 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 59 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: 102 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 956 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 220 m²/s²
0-3 km storm-relative helicity: 236 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.9

Open this sounding in Storm Lab

The text

As transmitted.

432 
WUUS54 KTSA 172148
SVRTSA
ARC007-172215-
/O.NEW.KTSA.SV.W.0018.210317T2148Z-210317T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
448 PM CDT Wed Mar 17 2021

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Northeastern Benton County in northwestern Arkansas...

* Until 515 PM CDT.

* At 448 PM CDT, a severe thunderstorm was located 5 miles southwest
  of Garfield, moving north at 35 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations in or near the path include...
  Rogers...                         Pea Ridge...
  Gateway...                        Avoca...
  Walnut Hill...                    Hill Top...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A Tornado Watch remains in effect until 800 PM CDT for northwestern
Arkansas.

LAT...LON 3633 9396 3635 9414 3650 9413 3650 9388
TIME...MOT...LOC 2148Z 190DEG 32KT 3641 9403 

HAIL...1.00IN
WIND...60MPH
 
$$
Snider

4 follow-up statements

609 
WWUS54 KTSA 172156
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
456 PM CDT Wed Mar 17 2021

ARC007-172215-
/O.CON.KTSA.SV.W.0018.000000T0000Z-210317T2215Z/
Benton AR-
456 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN BENTON COUNTY...

At 456 PM CDT, a severe thunderstorm was located near Garfield,
moving north at 35 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations in or near the path include...
Gateway...                        Hill Top...
Walnut Hill...                    

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A Tornado Watch remains in effect until 800 PM CDT for northwestern
Arkansas.

LAT...LON 3636 9395 3639 9405 3650 9407 3650 9388
TIME...MOT...LOC 2156Z 190DEG 32KT 3648 9401 

HAIL...1.50IN
WIND...60MPH
 
$$
Snider

837 
WWUS54 KTSA 172202
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
502 PM CDT Wed Mar 17 2021

ARC007-172215-
/O.CON.KTSA.SV.W.0018.000000T0000Z-210317T2215Z/
Benton AR-
502 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN BENTON COUNTY...

At 501 PM CDT, a severe thunderstorm was located 3 miles west of
Seligman, moving north at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations in or near the path include...
Gateway...                        Hill Top...
Walnut Hill...                    

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A Tornado Watch remains in effect until 800 PM CDT for northwestern
Arkansas.

LAT...LON 3640 9393 3641 9401 3650 9403 3650 9388
TIME...MOT...LOC 2201Z 190DEG 32KT 3653 9400 

HAIL...1.75IN
WIND...60MPH
 
$$
Snider

208 
WWUS54 KTSA 172204
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
504 PM CDT Wed Mar 17 2021

ARC007-172215-
/O.CON.KTSA.SV.W.0018.000000T0000Z-210317T2215Z/
Benton AR-
504 PM CDT Wed Mar 17 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN BENTON COUNTY...

At 504 PM CDT, a severe thunderstorm was located near Washburn,
moving north at 35 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees.

Locations in or near the path include...
Gateway...                        Hill Top...
Walnut Hill...                    

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

A Tornado Watch remains in effect until 800 PM CDT for northwestern
Arkansas.

LAT...LON 3640 9393 3641 9401 3650 9403 3650 9388
TIME...MOT...LOC 2204Z 190DEG 32KT 3656 9399 

TORNADO...POSSIBLE
HAIL...1.75IN
WIND...60MPH
 
$$
Snider

498 
WWUS54 KTSA 172213
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
513 PM CDT Wed Mar 17 2021

ARC007-172223-
/O.EXP.KTSA.SV.W.0018.000000T0000Z-210317T2215Z/
Benton AR-
513 PM CDT Wed Mar 17 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN BENTON COUNTY
WILL EXPIRE AT 515 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A Tornado Watch remains in effect until 800 PM CDT for northwestern
Arkansas.

LAT...LON 3640 9393 3641 9401 3650 9403 3650 9388
TIME...MOT...LOC 2213Z 190DEG 32KT 3663 9397 

$$
Snider

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 1:33 AM CDT	Severe Thunderstorm Warning	TSA	Sebastian	42 min
Mar 17, 1:52 AM CDT	Special Weather Statement	TSA	Sebastian	23 min
Mar 17, 2:37 AM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	38 min
Mar 17, 3:14 AM CDT	Severe Thunderstorm Warning	TSA	Franklin, Sebastian	33 min
Mar 17, 6:33 AM CDT	Special Weather Statement	TSA	Benton, Crawford, Franklin, Sebastian, Washington	42 min
Mar 17, 3:10 PM CDT	Special Weather Statement	TSA	Washington	35 min
Mar 17, 3:31 PM CDT	Severe Thunderstorm Warning	TSA	Benton	13 min
Mar 17, 4:02 PM CDT	Special Weather Statement	TSA	Benton	28 min
Mar 17, 4:09 PM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	13 min
Mar 17, 4:40 PM CDT	Special Weather Statement	TSA	Benton	35 min
Mar 17, 5:23 PM CDT	Special Weather Statement	TSA	Benton	37 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2021 Every severe thunderstorm warning in 2021

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.