Alert archive / Oklahoma / Mesoscale Discussions in 2017
Mesoscale Discussion 555
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2017, 10:30 PM CDT for 23 counties in Oklahoma. It was in force for 90 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2017, 10:30 PM CDT (03:30 UTC)
- Expired
- Apr 26, 2017, 12:00 AM CDT
- In force
- 90 min
- Issued by
- the Storm Prediction Center
All 23 counties
Cherokee County, OK, Cleveland County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garvin County, OK, Hughes County, OK, Lincoln County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 81 km from the middle of the area, began a volume at 03:32 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 00:00Z, 3.5 hours before the alert went out and 118 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
- 1456 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1711 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 160 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 10.8
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:14 PM CDT | Mesoscale Discussion | SPC | Cleveland, Craig, Creek, Delaware, Garvin, Grady and 23 more | 91 min |
| Apr 25, 10:51 PM CDT | Mesoscale Discussion | SPC | Craig, Delaware, Mayes, Ottawa | 54 min |
| Apr 25, 11:27 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Haskell, Latimer, LeFlore, Pittsburg, Sequoyah | 7 hr |
| Apr 26, 1:42 AM CDT | Mesoscale Discussion | SPC | Haskell, Latimer, LeFlore, Sequoyah | 2 hr |
| Apr 26, 5:37 AM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Choctaw, Latimer, LeFlore, McCurtain and 1 more | 113 min |
| Apr 26, 6:00 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Choctaw, Haskell, Latimer and 5 more | 7 hr |
| Apr 26, 7:29 AM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Choctaw, Haskell, Latimer and 5 more | 2 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2017Every mesoscale discussion in 2017
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.