Alert archive / Oklahoma / Tornado Watches in 2023
Tornado Watch 148
The Storm Prediction Center issued this tornado watch at Apr 19, 2023, 6:40 PM CDT for 7 counties in Oklahoma. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2023, 6:40 PM CDT (23:40 UTC)
- Expired
- Apr 20, 2023, 12:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Creek County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Tulsa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 57 km from the middle of the area, began a volume at 23:42 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 6:49 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 21 min |
| Apr 19, 7:54 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 39 min |
| Apr 19, 10:27 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 63 min |
| Apr 19, 11:18 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 42 min |
| Apr 19, 11:51 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 39 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 11.7 hours before the alert went out and 157 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
- 711 J/kg
- Mixed-layer CIN
- -395 J/kg
- Mixed-layer LCL
- 619 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 341 m²/s²
- 0-3 km storm-relative helicity
- 414 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 3:57 PM CDT | Mesoscale Discussion | SPC | Carter, Cleveland, Comanche, Cotton, Garvin, Grady and 5 more | 2 hr |
| Apr 19, 4:48 PM CDT | Tornado Watch | SPC | Caddo, Canadian, Carter, Cleveland, Comanche, Cotton and 17 more | 6 hr |
| Apr 19, 6:11 PM CDT | Mesoscale Discussion | SPC | Caddo, Canadian, Cleveland, Comanche, Creek, Grady and 6 more | 94 min |
| Apr 19, 6:31 PM CDT | Mesoscale Discussion | SPC | Creek, Lincoln, Logan, Mayes, Noble, Nowata and 9 more | 59 min |
Nearby
Tornado Watches in Oklahoma, 2023Every tornado watch in 2023
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.