Alert archive / Arkansas / Special Weather Statements in 2018

Special Weather Statement, NWS Tulsa, OK

July 16, 2018Franklin County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jul 16, 2018, 4:45 PM CDT for Franklin County, Arkansas. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 16, 2018, 4:45 PM CDT (21:45 UTC)
Expired
Jul 16, 2018, 5:15 PM CDT
In force
30 min
Issued by
NWS Tulsa, OK

County Franklin County, AR

The radar

The Western Arkansas radar (KSRX), 62 km from the middle of the area, began a volume at 21:48 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.8 hours before the alert went out and 150 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-pSkew-T log-p diagram, Springfield, MO at 12:00Z on 2018-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 750 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 12:00Z on 2018-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
750 J/kg
Mixed-layer CIN
-72 J/kg
Mixed-layer LCL
1347 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
-4 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 16, 3:11 PM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jul 16, 3:11 PM CDT, 1 hour 34 minutes before
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Hazardous weather outlook, Jul 16, 12:54 PM CDT, 3 hours 51 minutes before
Hazardous Weather Outlook
National Weather Service Tulsa OK
1254 PM CDT Mon Jul 16 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-171030-
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-
1254 PM CDT Mon Jul 16 2018

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

.DAY ONE...This afternoon and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Ongoing.

HEAVY RAIN.
	RISK...Limited.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Ongoing.

DANGEROUS HEAT.
	RISK...Significant.
	AREA...Eastern Oklahoma and western Arkansas.
	ONSET...Ongoing.

	AREA AT GREATEST RISK...Far northeast and far southeast Oklahoma.

DISCUSSION...
A persistent area of thunderstorms has been moving east along the
Kansas and Oklahoma border with an outflow boundary out ahead of
these storms. This boundary will be the focus for more storms
this afternoon across northeast Oklahoma into northwest Arkansas.
Showers have been ongoing all morning across eastern central
Oklahoma, south of Tulsa toward Tahlequah, and this has kept the
airmass in this zone more stable. However, the airmass along and
south of Interstate 40 has become more unstable. Storms may also
form this afternoon across this area. Any of the storms this
afternoon will have a limited threat of damaging wind gusts.

Hot and humid conditions also continue this afternoon across much
of eastern Oklahoma and west central Arkansas except in cloudy
areas. Early afternoon heat index values range from 101 to 105
degrees with a heat advisory in effect until 8 PM. Heat index
values will top out in the 105 to 109 range by mid afternoon with
cooler values across far northwest Arkansas.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.
TUESDAY and WEDNESDAY...Thunderstorm Potential...Dangerous Heat Potential.
THURSDAY through SUNDAY...Dangerous Heat Potential.

EXTENDED DISCUSSION...
The pattern will remain unsettled into mid week, with thunderstorm
chances continuing through Wednesday. There will be a continued
threat for strong downburst winds with the strongest afternoon
storms.

Hot and humid conditions will continue this week, likely increasing
late in the week as the upper level ridge builds into the area.

weather.gov/tulsa contains additional information.

CORFIDI

In the hours before

Special weather statement, Jul 16, 3:58 PM CDT, 47 minutes before
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Special weather statement, Jul 16, 4:05 PM CDT, 40 minutes before
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Special weather statement, Jul 16, 4:14 PM CDT, 31 minutes before
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Special weather statement, Jul 16, 4:31 PM CDT, 14 minutes before
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Local storm report, Jul 16, 4:41 PM CDT, 4 minutes before
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Special weather statement, Jul 16, 4:45 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 16, 4:06 AM CDTHeat AdvisoryTSAAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more16 hr
Jul 16, 4:49 AM CDTSpecial Weather StatementTSACherokee26 min
Jul 16, 9:58 AM CDTSpecial Weather StatementTSAOsage47 min
Jul 16, 10:41 AM CDTSpecial Weather StatementTSAOsage34 min
Jul 16, 11:15 AM CDTSpecial Weather StatementTSAWashington30 min
Jul 16, 12:10 PM CDTSpecial Weather StatementTSAWashington20 min
Jul 16, 1:47 PM CDTSpecial Weather StatementTSAMayes28 min
Jul 16, 2:02 PM CDTSpecial Weather StatementTSADelaware28 min
Jul 16, 2:06 PM CDTSpecial Weather StatementTSAHaskell24 min
Jul 16, 2:07 PM CDTSpecial Weather StatementTSALatimer23 min
Jul 16, 2:08 PM CDTSpecial Weather StatementTSAOttawa37 min
Jul 16, 2:11 PM CDTSpecial Weather StatementTSADelaware49 min
Jul 16, 2:27 PM CDTSevere Thunderstorm WarningTSADelaware, Ottawa30 min
Jul 16, 2:31 PM CDTSpecial Weather StatementTSAHaskell44 min
Jul 16, 2:35 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore27 min
Jul 16, 2:44 PM CDTHeat AdvisoryTSAAdair, Cherokee, Choctaw, Creek, Haskell, Latimer and 8 more29 hr
Jul 16, 3:04 PM CDTSpecial Weather StatementTSALeFlore41 min
Jul 16, 3:09 PM CDTSpecial Weather StatementTSALatimer51 min
Jul 16, 3:10 PM CDTSpecial Weather StatementTSALeFlore50 min
Jul 16, 3:58 PM CDTSpecial Weather StatementTSALeFlore47 min
Jul 16, 4:05 PM CDTSpecial Weather StatementTSALeFlore40 min
Jul 16, 4:46 PM CDTSpecial Weather StatementTSAPushmataha29 min
Jul 16, 5:36 PM CDTSpecial Weather StatementTSAPushmataha24 min
Jul 16, 5:59 PM CDTSpecial Weather StatementTSAPushmataha31 min
Jul 16, 2:41 PM CDTSpecial Weather StatementTSACrawford49 min
Jul 16, 2:52 PM CDTSpecial Weather StatementTSASebastian53 min
Jul 16, 2:56 PM CDTSpecial Weather StatementTSABenton49 min
Jul 16, 3:24 PM CDTSpecial Weather StatementTSAMadison36 min
Jul 16, 3:31 PM CDTSpecial Weather StatementTSABenton29 min
Jul 16, 3:38 PM CDTSpecial Weather StatementTSABenton52 min
Jul 16, 3:44 PM CDTAreal Flood AdvisoryTSABenton, Washington3 hr
Jul 16, 4:14 PM CDTSpecial Weather StatementTSAFranklin31 min
Jul 16, 4:31 PM CDTSpecial Weather StatementTSACarroll59 min

Nearby

Special Weather Statements in Arkansas, 2018Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.