Alert archive / Oklahoma / Mesoscale Discussions in 2005
Mesoscale Discussion 688
The Storm Prediction Center issued this mesoscale discussion at Apr 25, 2005, 8:49 PM CDT for 25 counties in Oklahoma. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Apr 25, 2005, 8:49 PM CDT (01:49 UTC)
- Expired
- Apr 25, 2005, 10:15 PM CDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
All 25 counties
Adair County, OK, Atoka County, OK, Cherokee County, OK, Choctaw County, OK, Coal County, OK, Creek County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, Mayes County, OK, McCurtain County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK
The radar
The Western Arkansas radar (KSRX), 93 km from the middle of the area, began a volume at 01:52 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 195 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
- 239 J/kg
- Mixed-layer CIN
- -8 J/kg
- Mixed-layer LCL
- 1786 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 25, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 19 more | 5 hr |
| Apr 25, 10:49 PM CDT | Mesoscale Discussion | SPC | Bryan, Choctaw, McCurtain | 86 min |
| Apr 25, 11:20 PM CDT | Severe Thunderstorm Watch | SPC | Atoka, Bryan, Choctaw, Coal, McCurtain, Pushmataha | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2005Every mesoscale discussion in 2005
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.