Alert archive / Oklahoma / Heat Advisories in 2017

Heat Advisory 9, NWS Tulsa, OK

August 19, 201722 counties in Oklahoma

NWS Tulsa, OK issued this heat advisory at Aug 19, 2017, 4:33 PM CDT for 22 counties in Oklahoma. It took effect at Aug 20, 2017, 12:00 PM CDT. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Aug 19, 2017, 4:33 PM CDT (21:33 UTC)
In effect from: Aug 20, 2017, 12:00 PM CDT
Expired: Aug 20, 2017, 7:47 PM CDT
In force: 8 hr
Issued by: NWS Tulsa, OK

All 22 counties

Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 40 km from the middle of the area, began a volume at 21:37 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, 9.6 hours before the alert went out and 197 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: 2292 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1029 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this heat 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 heat advisory went out at Aug 19, 4:14 PM CDT, 19 minutes earlier.

Area forecast discussion, Aug 19, 4:14 PM CDT, 19 minutes before

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Hazardous weather outlook, Aug 19, 1:09 PM CDT, 3 hours 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 4:00 AM CDT	Heat Advisory	TSA	Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more	16 hr
Aug 18, 7:04 PM CDT	Severe Thunderstorm Warning	TSA	Franklin	56 min
Aug 18, 7:22 PM CDT	Special Weather Statement	TSA	Madison	38 min
Aug 18, 7:44 PM CDT	Special Weather Statement	TSA	Madison	46 min

Nearby

Heat Advisories in Oklahoma, 2017 Heat Advisories in Arkansas, 2017 Every heat advisory in 2017

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.