Alert archive / Oklahoma / Heat Advisories in 2021
Heat Advisory 19, NWS Norman, OK
NWS Norman, OK issued this heat advisory at Aug 22, 2021, 2:59 PM CDT for 16 counties in Oklahoma; Clay County, Texas. It took effect at Aug 23, 2021, 12:00 PM CDT. It was in force for 8 hr.
The area
The counties it named.
The facts
- Issued
- Aug 22, 2021, 2:59 PM CDT (19:59 UTC)
- In effect from
- Aug 23, 2021, 12:00 PM CDT
- Expired
- Aug 23, 2021, 8:00 PM CDT
- In force
- 8 hr
- Issued by
- NWS Norman, OK
Counties Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Payne County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Clay County, TX
The radar
The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 20:01 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
Shreveport, LA (KSHV), launched 12:00Z, 8.0 hours before the alert went out and 376 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
- 483 J/kg
- Mixed-layer CIN
- -144 J/kg
- Mixed-layer LCL
- 1165 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 53 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 22, 2:04 PM CDT, 55 minutes earlier.
Area forecast discussion, Aug 22, 2:04 PM CDT, 55 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 21, 7:16 PM CDT | Severe Thunderstorm Warning | OUN | Lincoln, Payne | 29 min |
| Aug 21, 7:19 PM CDT | Special Weather Statement | OUN | Lincoln | 26 min |
| Aug 21, 7:25 PM CDT | Areal Flood Advisory | OUN | Blaine, Dewey | 3 hr |
| Aug 21, 7:40 PM CDT | Areal Flood Advisory | OUN | Blaine, Kingfisher | 3 hr |
| Aug 21, 8:14 PM CDT | Areal Flood Advisory | OUN | Kingfisher, Logan, Payne | 4 hr |
| Aug 21, 8:39 PM CDT | Areal Flood Advisory | OUN | Custer, Dewey, Roger Mills | 3 hr |
| Aug 22, 4:29 PM CDT | Special Weather Statement | OUN | Noble | 31 min |
Nearby
Heat Advisories in Oklahoma, 2021Heat Advisories in Texas, 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.