Alert archive / Arkansas / Special Weather Statements in 2018

Special Weather Statement, NWS Tulsa, OK

July 29, 2018Crawford County, Sebastian County, Arkansas

NWS Tulsa, OK issued this special weather statement at Jul 29, 2018, 8:19 AM CDT for Crawford County, Sebastian County, Arkansas. It was in force for 41 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 29, 2018, 8:19 AM CDT (13:19 UTC)
Expired
Jul 29, 2018, 9:00 AM CDT
In force
41 min
Issued by
NWS Tulsa, OK

Counties Crawford County, AR, Sebastian County, AR

The radar

The Western Arkansas radar (KSRX), 21 km from the middle of the area, began a volume at 13:20 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

Shreveport, LA (KBAD), launched 12:00Z, 1.3 hours before the alert went out and 339 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, Shreveport, LA at 12:00Z on 2018-07-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 662 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, Shreveport, LA at 12:00Z on 2018-07-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -12 square meters per square second.193958Sfc1 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
662 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
1046 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-12 m²/s²
0-3 km storm-relative helicity
111 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 29, 6:32 AM CDT, 1 hour 47 minutes earlier.

Area forecast discussion, Jul 29, 6:32 AM CDT, 1 hour 47 minutes before
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Hazardous weather outlook, Jul 29, 4:30 AM CDT, 3 hours 49 minutes before
Hazardous Weather Outlook
National Weather Service Tulsa OK
430 AM CDT Sun Jul 29 2018

ARZ001-002-010-011-019-020-029-OKZ049-053>076-300930-
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-
430 AM CDT Sun Jul 29 2018

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

.DAY ONE...Today and Tonight.

SEVERE THUNDERSTORM.
	RISK...Limited today. Elevated tonight.
	AREA...Much of northeast Oklahoma this morning. Northeast and east central Oklahoma tonight.
 	ONSET...Ongoing...ending by midday. Round two begins after midnight.

FLASH FLOOD.
	RISK...Limited.
	AREA...Much of northeast Oklahoma and northwest Arkansas.
	ONSET...Ongoing...ending by midday. Threat returns after midnight tonight.

HEAVY RAIN.
	RISK...Limited.
	AREA...Much of northeast Oklahoma and northwest Arkansas.
	ONSET...Ongoing...ending by midday. Threat returns after midnight tonight.

DISCUSSION...

There is a limited risk of severe weather this morning. Damaging
winds 60 to 70 mph will be the main threat, and is greatest across
northeast Oklahoma along and west of highway 75. There is an
elevated risk of severe weather tonight after midnight across
northeast and east central Oklahoma. Damaging winds to 70 mph will
be the main threat. Pockets of locally heavy rainfall may lead to
some localized flash flooding.

A complex of storms will move across the region this morning.
Another complex of storms is expected to arrive after midnight
tonight.

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

.DAYS TWO THROUGH SEVEN...Monday through Saturday.
MONDAY and TUESDAY...Thunderstorm Potential.
WEDNESDAY thru SATURDAY...No Hazards.

EXTENDED DISCUSSION...

A complex of storms will be ongoing early Monday morning, moving
southeast across portions of the region with a decreasing severe
wind threat with southward and eastward extent. Some isolated to
scattered storms could develop along the synoptic cold front by
Monday afternoon across portions of northeast Oklahoma and
northwest Arkansas. Severe weather is not expected with these
storms. There is a low chance for some lingering storms over
western Arkansas on Tuesday in association with an upper storm
system.

weather.gov/tulsa contains additional information.

Lacy

In the hours before

Special weather statement, Jul 29, 5:54 AM CDT, 2 hours 25 minutes before
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Special weather statement, Jul 29, 6:05 AM CDT, 2 hours 14 minutes before
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Special weather statement, Jul 29, 6:30 AM CDT, 1 hour 49 minutes before
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Special weather statement, Jul 29, 6:34 AM CDT, 1 hour 45 minutes before
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Special weather statement, Jul 29, 7:09 AM CDT, 1 hour 10 minutes before
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Special weather statement, Jul 29, 8:19 AM 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 29, 4:37 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee53 min
Jul 29, 5:28 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee47 min
Jul 29, 5:35 AM CDTSpecial Weather StatementTSACreek40 min
Jul 29, 5:54 AM CDTSpecial Weather StatementTSARogers51 min
Jul 29, 6:05 AM CDTSpecial Weather StatementTSAOkmulgee40 min
Jul 29, 6:30 AM CDTSpecial Weather StatementTSAMayes45 min
Jul 29, 6:34 AM CDTSpecial Weather StatementTSAOkfuskee41 min
Jul 29, 7:09 AM CDTSpecial Weather StatementTSAMcIntosh51 min
Jul 29, 8:56 AM CDTSpecial Weather StatementTSAFranklin, Sebastian34 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.