Alert archive / Oklahoma / Excessive Heat Warnings in 2020

Excessive Heat Warning 3, NWS Tulsa, OK

July 11, 202018 counties in Oklahoma

NWS Tulsa, OK issued this excessive heat warning at Jul 11, 2020, 11:23 AM CDT for 18 counties in Oklahoma. It was in force for 10 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 11, 2020, 11:23 AM CDT (16:23 UTC)
Expired: Jul 11, 2020, 9:00 PM CDT
In force: 10 hr
Issued by: NWS Tulsa, OK

Counties Choctaw County, OK, Craig County, OK, Creek 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, 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), 53 km from the middle of the area, began a volume at 16:23 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

Norman, OK (KOUN), launched 12:00Z, 4.4 hours before the alert went out and 164 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: 1751 J/kg
Mixed-layer CIN: -247 J/kg
Mixed-layer LCL: 1318 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 117 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this excessive heat warning 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 excessive heat warning went out at Jul 11, 11:05 AM CDT, 18 minutes earlier.

Area forecast discussion, Jul 11, 11:05 AM CDT, 18 minutes before

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Hazardous weather outlook, Jul 11, 4:44 AM CDT, 6 hours 39 minutes before

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In the hours before

Special weather statement, Jul 11, 7:46 AM CDT, 3 hours 37 minutes before

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Special weather statement, Jul 11, 8:15 AM CDT, 3 hours 8 minutes before

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Special weather statement, Jul 11, 8:56 AM CDT, 2 hours 27 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, 1:05 PM CDT	Heat Advisory	TSA	Adair, Cherokee, Delaware, Ottawa	8 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

Excessive Heat Warnings in Oklahoma, 2020 Excessive Heat Warnings in Arkansas, 2020 Every excessive heat warning 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.