Alert archive / Oklahoma / Heat Advisories in 2020

Heat Advisory 7, NWS Tulsa, OK

July 11, 20204 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this heat advisory at Jul 11, 2020, 1:05 PM CDT for 4 counties in Oklahoma; 4 counties in Arkansas. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Jul 11, 2020, 1:05 PM CDT (18:05 UTC)
Expired: Jul 11, 2020, 9:00 PM CDT
In force: 8 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, Ottawa County, OK

The radar

The Western Arkansas radar (KSRX), 103 km from the middle of the area, began a volume at 18:08 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, 6.1 hours before the alert went out and 92 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: 1333 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1092 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 80 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 Jul 11, 12:25 PM CDT, 40 minutes earlier.

Area forecast discussion, Jul 11, 12:25 PM CDT, 40 minutes before

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Hazardous weather outlook, Jul 11, 12:45 PM CDT, 20 minutes before

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In the hours before

Special weather statement, Jul 11, 7:46 AM CDT, 5 hours 19 minutes before

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Special weather statement, Jul 11, 8:15 AM CDT, 4 hours 50 minutes before

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Special weather statement, Jul 11, 8:56 AM CDT, 4 hours 9 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
Jul 11, 3:16 AM CDT	Heat Advisory	TSA	Choctaw, Craig, Creek, Haskell, Latimer, McIntosh and 12 more	10 hr
Jul 11, 7:46 AM CDT	Special Weather Statement	TSA	Osage	29 min
Jul 11, 8:15 AM CDT	Special Weather Statement	TSA	Osage	45 min
Jul 11, 8:56 AM CDT	Special Weather Statement	TSA	Rogers, Washington	34 min
Jul 11, 11:23 AM CDT	Excessive Heat Warning	TSA	Choctaw, Craig, Creek, Haskell, Latimer, McIntosh and 12 more	10 hr
Jul 11, 5:54 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Ottawa	66 min
Jul 11, 6:35 PM CDT	Special Weather Statement	TSA	Delaware	55 min
Jul 11, 6:55 PM CDT	Severe Thunderstorm Warning	TSA	Craig	50 min
Jul 11, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	48 min

Nearby

Heat Advisories in Oklahoma, 2020 Heat Advisories in Arkansas, 2020 Every heat advisory in 2020

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.