Alert archive / Missouri / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 285
The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2008, 1:21 AM CDT for 4 states. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2008, 1:21 AM CDT (06:21 UTC)
- Expired
- May 9, 2008, 4:26 AM CDT
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 29 counties
Benton County, AR, Boone County, AR, Carroll County, AR, Madison County, AR, Marion County, AR, Newton County, AR, Searcy County, AR, Washington County, AR, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Christian County, MO, Dade County, MO, Douglas County, MO, Greene County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Ozark County, MO, Stone County, MO, Taney County, MO, Craig County, OK, Delaware County, OK, Mayes County, OK, Ottawa County, OK, Rogers County, OK, Tulsa County, OK
The radar
The Springfield radar (KSGF), 90 km from the middle of the area, began a volume at 06:25 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 1:50 AM CDT | Tornado Warning | TSA | Nowata, Rogers, Washington | 37 min |
| May 9, 2:22 AM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes, Rogers | 35 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
Springfield, MO (KSGF), launched 00:00Z, 6.4 hours before the alert went out and 47 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
- 3 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 750 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 17 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 |
|---|---|---|---|---|
| May 9, 3:45 AM CDT | Mesoscale Discussion | SPC | Benton, Boone, Carroll, Madison, Marion, Newton and 1 more | 60 min |
| May 9, 3:29 PM CDT | Mesoscale Discussion | SPC | Arkansas, Clark, Cleburne, Craighead, Crittenden, Cross and 20 more | 2 hr |
| May 8, 7:19 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Comanche, Edwards, Ellis and 25 more | 56 min |
| May 8, 8:08 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Butler, Chautauqua, Clark, Comanche, Cowley and 18 more | 6 hr |
| May 9, 12:33 AM CDT | Mesoscale Discussion | SPC | Allen, Bourbon, Butler, Chautauqua, Cherokee, Cowley and 8 more | 87 min |
| May 9, 1:00 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 3 hr |
| May 9, 2:18 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Gove, Logan, Rawlins, Sherman, Thomas and 1 more | 6 hr |
| May 9, 3:47 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Gove, Logan, Rawlins, Sherman, Thomas and 1 more | 118 min |
| May 9, 6:02 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Gove, Logan, Rawlins, Sheridan, Sherman and 2 more | 118 min |
Nearby
Severe Thunderstorm Watches in Missouri, 2008Severe Thunderstorm Watches in Arkansas, 2008Severe Thunderstorm Watches in Oklahoma, 2008Every severe thunderstorm watch in 2008
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.