Alert archive / Arkansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 11, NWS Tulsa, OK

March 10, 2018Franklin County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at Mar 10, 2018, 5:03 PM CST for Franklin County, Arkansas. It was in force for 42 min. 3 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 10, 2018, 5:03 PM CST (23:03 UTC)
Expired: Mar 10, 2018, 5:45 PM CST
In force: 42 min
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

County Franklin County, AR

The radar

The Western Arkansas radar (KSRX), 45 km from the middle of the area, began a volume at 23:06 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
Mar 10, 5:06 PM CST	HAIL 1.75	4 Sw Cecil, AR
Mar 10, 5:06 PM CST	HAIL 2	6 N Charleston, AR
Mar 10, 5:17 PM CST	HAIL 1	Branch, AR

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 3 storm reports to this severe thunderstorm warning; the first came 3 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 10, 3:43 PM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 11.1 hours before the alert went out and 172 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: 1807 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 116 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

937 
WUUS54 KTSA 102303
SVRTSA
ARC047-102345-
/O.NEW.KTSA.SV.W.0011.180310T2303Z-180310T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Tulsa OK
503 PM CST SAT MAR 10 2018

The National Weather Service in Tulsa has issued a

* Severe Thunderstorm Warning for...
  Southern Franklin County in west central Arkansas...

* Until 545 PM CST

* At 503 PM CST, a severe thunderstorm was located 6 miles north of
  Charleston, moving southeast at 30 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...
  Charleston...                     Branch...
  Caulksville...                    Etna...
  Peter Pender...                   Vesta...
  Meg...                            

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3537 9375 3539 9378 3538 9381 3531 9381
      3532 9392 3523 9392 3523 9400 3532 9408
      3540 9408 3545 9402 3540 9381 3538 9371
      3538 9373
TIME...MOT...LOC 2303Z 294DEG 25KT 3539 9405 

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

3 follow-up statements

355 
WWUS54 KTSA 102315
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
515 PM CST SAT MAR 10 2018

ARC047-102345-
/O.CON.KTSA.SV.W.0011.000000T0000Z-180310T2345Z/
Franklin AR-
515 PM CST SAT MAR 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CST
FOR SOUTHERN FRANKLIN COUNTY...

At 514 PM CST, a severe thunderstorm was located over Branch, moving
southeast at 30 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...
Charleston...                     Branch...
Caulksville...                    Etna...
Peter Pender...                   Vesta...
Meg...                            

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3537 9375 3539 9377 3538 9381 3531 9381
      3532 9392 3523 9392 3523 9400 3534 9405
      3540 9405 3545 9402 3540 9381 3538 9371
      3538 9374
TIME...MOT...LOC 2314Z 299DEG 27KT 3533 9395 

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

735 
WWUS54 KTSA 102322
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
522 PM CST SAT MAR 10 2018

ARC047-102345-
/O.CON.KTSA.SV.W.0011.000000T0000Z-180310T2345Z/
Franklin AR-
522 PM CST SAT MAR 10 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CST
FOR SOUTHERN FRANKLIN COUNTY...

At 522 PM CST, a severe thunderstorm was located over Ratcliff,
moving southeast at 30 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...
Charleston...                     Branch...
Caulksville...                    Etna...
Peter Pender...                   Meg...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Tulsa.

&&

LAT...LON 3537 9375 3539 9376 3538 9381 3531 9381
      3532 9392 3523 9392 3523 9400 3531 9404
      3542 9391 3538 9371 3538 9374
TIME...MOT...LOC 2322Z 295DEG 24KT 3531 9390 

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

086 
WWUS54 KTSA 102339
SVSTSA

Severe Weather Statement
National Weather Service Tulsa OK
539 PM CST SAT MAR 10 2018

ARC047-102349-
/O.EXP.KTSA.SV.W.0011.000000T0000Z-180310T2345Z/
Franklin AR-
539 PM CST SAT MAR 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FRANKLIN COUNTY WILL
EXPIRE AT 545 PM CST...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A severe thunderstorm watch remains in effect until 1000 PM CST for
west central Arkansas.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Tulsa.

LAT...LON 3537 9375 3539 9376 3538 9381 3531 9381
      3532 9392 3523 9392 3523 9400 3531 9404
      3542 9391 3538 9371 3538 9374
TIME...MOT...LOC 2339Z 300DEG 20KT 3525 9385 

$$

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 10, 3:24 PM CST, 1 hour 39 minutes earlier.

Area forecast discussion, Mar 10, 3:24 PM CST, 1 hour 39 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
324 PM CST Sat Mar 10 2018

.DISCUSSION...
A narrow differential heating zone along with a diffuse surface
boundary has yielded scattered showers and thunderstorms across
parts of eastern OK over the past 1-2 hours. This activity has
gradually increased in coverage/intensity recently, along with a
report of small hail. Hi-res models trends suggests that the
boundary will remain activity well into the evening, with clusters
of storms eventually peeling into western AR. Instability along
with bulk shear values around 50-60kt are supportive of large hail
and some strong wind gusts. Will also need to monitor an isolated
heavy rain threat, with some training of cells likely into the
evening. The storm threat will shift southeast later tonight as
the upper wave and cold front pushes into the region.

The cold front will clear the area late tonight, with a breezy and
chilly Sunday on tap. Surface ridging conditions will persist
through around mid-week, with seasonally cool weather prevailing.
Strong height rises along with low-level return flow will result
in an impressive warmup late week, with highs well into the 70s
(if not 80s) by Friday and going into the weekend. Will also see
showers/thunderstorms return to the forecast as the upper flow
becomes more active.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   40  55  31  54 /  50   0   0   0
FSM   46  59  34  54 /  80  10   0   0
MLC   45  59  33  54 /  40  10   0   0
BVO   36  54  28  52 /  20   0   0   0
FYV   41  50  29  50 /  50  20   0   0
BYV   40  49  30  50 /  50  30   0   0
MKO   41  56  33  53 /  70  10   0   0
MIO   39  51  30  51 /  20  10   0   0
F10   43  56  33  54 /  50  10   0   0
HHW   51  62  36  55 /  20  10   0   0

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...None.
AR...None.
&&

SHORT TERM...20
LONG TERM....18

Hazardous weather outlook, Mar 10, 4:52 PM CST, 11 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
452 PM CST Sat Mar 10 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-111115-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
452 PM CST Sat Mar 10 2018

...SLIGHT RISK OF SEVERE STORMS SOME AREAS LATE AFTERNOON AND EVENING...

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Late Afternoon and Tonight.

TORNADO.
	RISK...Limited.
	AREA...Far eastern Oklahoma and west central Arkansas.
	ONSET...Ongoing.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Far eastern Oklahoma and west central Arkansas.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Limited.
	AREA...Far eastern Oklahoma and west central Arkansas.
	ONSET...Ongoing.

DISCUSSION...
Scattered strong to severe thunderstorms will continue into the
evening hours across portions of far eastern Oklahoma and west
central Arkansas. Large hail and damaging winds will be the main
threat, although there is a very low tornado threat for any storms
that develop along any weak surface boundaries in the area.

The severe weather threat should diminish by late evening, with much
of the thunderstorm activity east of the area by midnight.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Likely.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.
SUNDAY...Very High Fire Weather Potential...High Wind Potential.
MONDAY THROUGH WEDNESDAY...No Hazards.
THURSDAY AND FRIDAY...Very High Fire Weather Potential...High Wind Potential.

EXTENDED DISCUSSION...
Gusty northwest winds and much drier air are expected to move into
the region Sunday behind a strong cold front, with gusts up to 30
mph possible across eastern Oklahoma. The gusty winds and drier
air will raise fire weather concerns.

In the wake of cool high pressure that will be in place through
the middle of next week, strong south winds and warmer temperatures
will lead to elevated fire weather conditions to close out the
upcoming work week.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Mar 10, 4:46 PM CST, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
446 PM CST SAT MAR 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0418 PM     HAIL             CEDARVILLE              35.57N 94.37W
03/10/2018  E0.75 INCH       CRAWFORD           AR   BROADCAST MEDIA

            HAIL COVERING THE GROUND

&&

AEJ

Special weather statement, Mar 10, 4:46 PM CST, 17 minutes before

Special Weather Statement
National Weather Service Tulsa OK
446 PM CST SAT MAR 10 2018

OKZ068-070-102315-
Muskogee OK-Cherokee OK-
446 PM CST SAT MAR 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHEROKEE AND
NORTHEASTERN MUSKOGEE COUNTIES UNTIL 515 PM CST...

At 445 PM CST, a strong thunderstorm was located 3 miles east of Fort
Gibson, moving east at 25 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Tahlequah...                      Fort Gibson...

A severe thunderstorm watch remains in effect until 1000 PM CST for
northeastern and east central Oklahoma.

LAT...LON 3592 9496 3569 9495 3578 9528 3581 9528
      3581 9527 3582 9527 3583 9525 3584 9525
      3586 9523
TIME...MOT...LOC 2245Z 274DEG 24KT 3582 9519

Special weather statement, Mar 10, 4:51 PM CST, 12 minutes before

Special Weather Statement
National Weather Service Tulsa OK
451 PM CST SAT MAR 10 2018

ARZ020-102315-
Franklin AR-
451 PM CST SAT MAR 10 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FRANKLIN COUNTY UNTIL 515
PM CST...

At 451 PM CST, strong thunderstorms were located along a line
extending from 4 miles northeast of Ozark to 6 miles east of
Mulberry. Movement was east at 35 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
these storms.

Locations in or near the path include...
Ozark...                          Altus...
Denning...                        Wiederkehr Village...
Toney...                          Alix...
Cecil...                          Meg...

This includes Interstate 40 in Arkansas between mile markers 27 and
42.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Tulsa.

&&

A severe thunderstorm watch remains in effect until 1000 PM CST for
west central Arkansas.

LAT...LON 3541 9371 3540 9379 3542 9380 3540 9381
      3537 9397 3553 9399 3559 9370
TIME...MOT...LOC 2251Z 284DEG 29KT 3554 9379 3550 9393

Local storm report, Mar 10, 4:54 PM CST, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
454 PM CST SAT MAR 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0450 PM     HAIL             8 W OZARK               35.49N 93.97W
03/10/2018  E0.75 INCH       FRANKLIN           AR   FIRE DEPT/RESCUE

&&

AEJ

Local storm report, Mar 10, 4:58 PM CST, 5 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TULSA OK
458 PM CST SAT MAR 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0323 PM     HAIL             BRAGGS                  35.66N 95.20W
03/10/2018  E0.75 INCH       MUSKOGEE           OK   PUBLIC

0406 PM     HAIL             2 W UNIONTOWN           35.58N 94.48W
03/10/2018  E1.75 INCH       SEQUOYAH           OK   EMERGENCY MNGR

0410 PM     HAIL             UNIONTOWN               35.58N 94.44W
03/10/2018  E1.00 INCH       CRAWFORD           AR   PUBLIC

0418 PM     HAIL             CEDARVILLE              35.57N 94.37W
03/10/2018  E0.75 INCH       CRAWFORD           AR   BROADCAST MEDIA

            HAIL COVERING THE GROUND

0422 PM     HAIL             7 N VAN BUREN           35.54N 94.35W
03/10/2018  E0.75 INCH       CRAWFORD           AR   PUBLIC

0440 PM     HAIL             ALMA                    35.48N 94.22W
03/10/2018  E0.75 INCH       CRAWFORD           AR   BROADCAST MEDIA

            HAIL COVERING THE GROUND

0450 PM     HAIL             8 W OZARK               35.49N 93.97W
03/10/2018  E0.88 INCH       FRANKLIN           AR   FIRE DEPT/RESCUE

            HAIL COVERING THE GROUND

&&

AEJ

Local storm report, Mar 10, 5:02 PM CST, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
502 PM CST SAT MAR 10 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0430 PM     HAIL             RUDY                    35.53N 94.27W
03/10/2018  E0.75 INCH       CRAWFORD           AR   BROADCAST MEDIA

            HAIL COVERING THE GROUND

0440 PM     HAIL             ALMA                    35.48N 94.22W
03/10/2018  E1.00 INCH       CRAWFORD           AR   BROADCAST MEDIA

&&

AEJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 10, 3:48 PM CST	Severe Thunderstorm Warning	TSA	Crawford	27 min
Mar 10, 4:12 PM CST	Severe Thunderstorm Warning	TSA	Crawford	33 min
Mar 10, 4:42 PM CST	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	33 min
Mar 10, 4:51 PM CST	Special Weather Statement	TSA	Franklin	24 min
Mar 10, 5:09 PM CST	Special Weather Statement	TSA	Crawford	36 min
Mar 10, 5:09 PM CST	Severe Thunderstorm Warning	TSA	Franklin	36 min
Mar 10, 5:17 PM CST	Severe Thunderstorm Warning	TSA	Crawford	28 min
Mar 10, 5:45 PM CST	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian	11 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 2018 Every severe thunderstorm warning 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.