Alert archive / Oklahoma / Mesoscale Discussions in 2007
Mesoscale Discussion 447
The Storm Prediction Center issued this mesoscale discussion at Apr 10, 2007, 9:19 PM CDT for 6 counties in Arkansas; 18 counties in Oklahoma; Bowie County, Lamar County, Red River County, Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Apr 10, 2007, 9:19 PM CDT (02:19 UTC)
- Expired
- Apr 10, 2007, 10:15 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
All 27 counties
Howard County, AR, Little River County, AR, Polk County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Marshall County, OK, McCurtain County, OK, McIntosh County, OK, Murray County, OK, Okfuskee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Seminole County, OK, Bowie County, TX, Lamar County, TX, Red River County, TX
The radar
The Western Arkansas radar (KSRX), 146 km from the middle of the area, began a volume at 02:22 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, 2.3 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 625 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 358 m²/s²
- 0-3 km storm-relative helicity
- 411 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
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 10, 11:24 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Clark, Cleburne and 42 more | 96 min |
| Apr 10, 11:45 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Cleveland, Dallas and 23 more | 4 hr |
| Apr 11, 2:19 AM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 14 more | 116 min |
| Apr 11, 2:56 AM CDT | Severe Thunderstorm Watch | SPC | Ashley, Chicot, Lee, Phillips | 5 hr |
| Apr 10, 7:52 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 18 more | 83 min |
Nearby
Mesoscale Discussions in Oklahoma, 2007Mesoscale Discussions in Arkansas, 2007Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007
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.