Alert archive / Oklahoma / Heat Advisories in 2021
Heat Advisory 16, NWS Norman, OK
NWS Norman, OK issued this heat advisory at Aug 20, 2021, 1:33 PM CDT for 22 counties in Oklahoma. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2021, 1:33 PM CDT (18:33 UTC)
- Expired
- Aug 20, 2021, 9:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Norman, OK
All 22 counties
Canadian County, OK, Carter County, OK, Cleveland County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Hughes County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Murray County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Stephens County, OK
The radar
The Norman radar (KTLX), 7 km from the middle of the area, began a volume at 18:34 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
Dodge City, (KDDC), launched 12:00Z, 6.6 hours before the alert went out and 351 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.
- Mixed-layer CAPE
- 744 J/kg
- Mixed-layer CIN
- -260 J/kg
- Mixed-layer LCL
- 1570 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 203 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
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 Norman, OK wrote its last area forecast discussion before this heat advisory went out at Aug 20, 12:20 PM CDT, 1 hour 13 minutes earlier.
Area forecast discussion, Aug 20, 12:20 PM CDT, 1 hour 13 minutes before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 7:45 PM CDT | Special Weather Statement | OUN | Hardeman | 45 min |
| Aug 19, 9:45 PM CDT | Special Weather Statement | OUN | Wichita | 30 min |
| Aug 19, 9:49 PM CDT | Special Weather Statement | OUN | Wilbarger | 26 min |
| Aug 19, 10:15 PM CDT | Special Weather Statement | OUN | Wilbarger | 30 min |
| Aug 19, 10:42 PM CDT | Areal Flood Advisory | OUN | Wilbarger | 3 hr |
| Aug 19, 10:47 PM CDT | Special Weather Statement | OUN | Baylor | 28 min |
| Aug 19, 11:30 PM CDT | Special Weather Statement | OUN | Baylor | 30 min |
| Aug 19, 11:38 PM CDT | Areal Flood Advisory | OUN | Baylor | 3 hr |
Nearby
Heat Advisories in Oklahoma, 2021Every heat 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.