Alert archive / Arkansas / Dense Fog Advisories in 2021

Dense Fog Advisory 8, NWS Tulsa, OK

October 14, 2021Adair County, Cherokee County, Delaware County, Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this dense fog advisory at Oct 14, 2021, 10:27 PM CDT for Adair County, Cherokee County, Delaware County, Oklahoma; 4 counties in Arkansas. It was in force for 5 hr.

The area

The counties it named.

The facts

Issued: Oct 14, 2021, 10:27 PM CDT (03:27 UTC)
Expired: Oct 15, 2021, 3:52 AM CDT
In force: 5 hr
Issued by: NWS Tulsa, OK

Counties Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Delaware County, OK

The radar

The Western Arkansas radar (KSRX), 93 km from the middle of the area, began a volume at 03:28 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 00:00Z, 3.5 hours before the alert went out and 98 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: 130 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 513 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: -6 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this dense fog advisory 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 dense fog advisory went out at Oct 14, 9:18 PM CDT, 1 hour 9 minutes earlier.

Area forecast discussion, Oct 14, 9:18 PM CDT, 1 hour 9 minutes before

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Hazardous weather outlook, Oct 14, 9:42 PM CDT, 45 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
942 PM CDT Thu Oct 14 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-151015-
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-
942 PM CDT Thu Oct 14 2021

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

.DAY ONE...Tonight.

TORNADO.
	RISK...Limited.
    AREA...Northeast Oklahoma and northwest Arkansas
    ONSET...After midnight.

SEVERE THUNDERSTORM.
	RISK...Limited.
	AREA...Northeast Oklahoma and northwest Arkansas.
	ONSET...After midnight.

FLASH FLOOD.
	RISK...Limited.
	AREA...Northeast Oklahoma and northwest Arkansas.
	ONSET...After midnight.

HEAVY RAIN.
	RISK...Elevated.
	AREA...Northeast Oklahoma and northwest Arkansas.
	ONSET...After midnight.

DISCUSSION...

A cluster of strong thunderstorms with very heavy rain will move
into northeast Oklahoma after midnight pushing east into northwest
Arkansas late tonight. A few of these storms could be marginally
severe with large hail and damaging winds. Although low level wind
fields will not be particularly strong, a brief tornado can not be
ruled out. The storms will sweep east of northwest Arkansas by mid
morning Friday with the severe threat ending.  Rainfall amounts
between 1 to 2 inches will be likely along and south of I-44 and
north of I-40 with locally higher amounts near 3 inches.

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

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
FRIDAY...Thunderstorm Potential...High Wind Potential.
SATURDAY thru WEDNESDAY...No Hazards.

EXTENDED DISCUSSION...

North to northwest winds will gust to near 30 mph behind a cold
front during the day on Friday. Cool, fall like weather is expected
for the weekend into next week with dry conditions.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Oct 14, 8:04 PM CDT, 2 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
804 PM CDT THU OCT 14 2021

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

0926 PM     TORNADO          5 N PADEN               35.58N 96.55W
10/10/2021                   OKFUSKEE           OK   NWS STORM SURVEY

            A TORNADO SNAPPED AND UPROOTED NUMEROUS
            TREES, AND DAMAGED OUTBUILDINGS.

&&

EJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 15, 1:41 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	49 min
Oct 15, 1:44 AM CDT	Special Weather Statement	TSA	Creek, Tulsa	46 min
Oct 15, 2:26 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	49 min
Oct 15, 2:29 AM CDT	Special Weather Statement	TSA	Rogers, Tulsa	46 min
Oct 15, 2:37 AM CDT	Areal Flood Advisory	TSA	Creek, Osage, Tulsa	3 hr
Oct 15, 2:51 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okmulgee	39 min
Oct 15, 3:13 AM CDT	Special Weather Statement	TSA	Mayes, Rogers, Wagoner	47 min
Oct 15, 3:29 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, McIntosh, Muskogee, Wagoner	46 min
Oct 15, 3:32 AM CDT	Areal Flood Advisory	TSA	Muskogee, Okmulgee, Tulsa, Wagoner	118 min
Oct 15, 3:53 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Muskogee, Sequoyah	52 min
Oct 15, 4:02 AM CDT	Special Weather Statement	TSA	Delaware	43 min
Oct 15, 4:35 AM CDT	Special Weather Statement	TSA	Adair, Sequoyah	55 min
Oct 15, 7:51 AM CDT	Areal Flood Advisory	TSA	Haskell, LeFlore, Muskogee, Sequoyah	2 hr
Oct 15, 5:21 AM CDT	Special Weather Statement	TSA	Crawford, Franklin, Madison	39 min
Oct 15, 5:32 AM CDT	Tornado Warning	TSA	Madison	26 min
Oct 15, 6:02 AM CDT	Special Weather Statement	TSA	Carroll	28 min

Nearby

Dense Fog Advisories in Arkansas, 2021 Dense Fog Advisories in Oklahoma, 2021 Every dense fog advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.