Alert archive / Oklahoma / Heat Advisories in 2018

Heat Advisory 9, NWS Tulsa, OK

July 11, 201818 counties in Oklahoma

NWS Tulsa, OK issued this heat advisory at Jul 11, 2018, 2:53 PM CDT for 18 counties in Oklahoma. It took effect at Jul 11, 2018, 4:00 PM CDT. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued: Jul 11, 2018, 2:53 PM CDT (19:53 UTC)
In effect from: Jul 11, 2018, 4:00 PM CDT
Expired: Jul 11, 2018, 7:59 PM CDT
In force: 4 hr
Issued by: NWS Tulsa, OK

Counties Cherokee 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, Ottawa County, OK, Pawnee County, OK, Pittsburg County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 26 km from the middle of the area, began a volume at 19:53 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, 7.9 hours before the alert went out and 179 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: 1036 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1103 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: -15 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, 12:36 PM CDT, 2 hours 17 minutes earlier.

Area forecast discussion, Jul 11, 12:36 PM CDT, 2 hours 17 minutes before

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Hazardous weather outlook, Jul 11, 12:47 PM CDT, 2 hours 6 minutes before

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In the hours before

Special weather statement, Jul 11, 1:31 PM CDT, 1 hour 22 minutes before

Special Weather Statement
National Weather Service Tulsa OK
131 PM CDT WED JUL 11 2018

OKZ068-070-111900-
Muskogee OK-Cherokee OK-
131 PM CDT WED JUL 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CHEROKEE AND
NORTHEASTERN MUSKOGEE COUNTIES UNTIL 200 PM CDT...

At 129 PM CDT, a strong thunderstorm was located 5 miles north of
Pumpkin Center, moving southwest at 20 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations in or near the path include...
Muskogee...                       Fort Gibson...
Braggs...                         Pumpkin Center...
Keefeton...

LAT...LON 3570 9500 3557 9534 3580 9543 3582 9535
      3581 9534 3581 9527 3582 9527 3583 9525
      3584 9525 3586 9523 3589 9511
TIME...MOT...LOC 1829Z 065DEG 16KT 3578 9516

Special weather statement, Jul 11, 2:16 PM CDT, 37 minutes before

Special Weather Statement
National Weather Service Tulsa OK
216 PM CDT WED JUL 11 2018

OKZ068-070-072-111945-
Muskogee OK-Sequoyah OK-Cherokee OK-
216 PM CDT WED JUL 11 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SEQUOYAH...
SOUTHWESTERN CHEROKEE AND NORTHEASTERN MUSKOGEE COUNTIES UNTIL 245 PM
CDT...

At 215 PM CDT, a strong thunderstorm was located near Pumpkin Center,
moving northwest at 15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations in or near the path include...
Muskogee...                       Fort Gibson...
Braggs...                         Cookson...
Greenleaf State Park...           Pumpkin Center...
Lake Tenkiller State Park...

LAT...LON 3574 9490 3558 9500 3564 9540 3581 9532
      3581 9527 3582 9527 3583 9525 3585 9523
      3586 9523 3588 9526
TIME...MOT...LOC 1915Z 118DEG 13KT 3570 9509

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 1:31 PM CDT	Special Weather Statement	TSA	Muskogee	29 min
Jul 11, 2:16 PM CDT	Special Weather Statement	TSA	Cherokee	29 min
Jul 11, 3:47 PM CDT	Heat Advisory	TSA	Cherokee, Choctaw, Craig, Creek, Delaware, Haskell and 15 more	28 hr
Jul 11, 5:03 PM CDT	Special Weather Statement	TSA	LeFlore	27 min
Jul 11, 6:31 PM CDT	Special Weather Statement	TSA	Pushmataha	44 min

Nearby

Heat Advisories in Oklahoma, 2018 Heat Advisories in Arkansas, 2018 Every heat advisory 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.