Alert archive / Kansas / Severe Thunderstorm Watches in 2009
Severe Thunderstorm Watch 263
The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2009, 11:13 PM CDT for 19 counties in Kansas; 5 counties in Nebraska. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2009, 11:13 PM CDT (04:13 UTC)
- Expired
- May 8, 2009, 3:11 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 24 counties
Cheyenne County, KS, Decatur County, KS, Gove County, KS, Graham County, KS, Greeley County, KS, Jewell County, KS, Logan County, KS, Mitchell County, KS, Norton County, KS, Osborne County, KS, Phillips County, KS, Rawlins County, KS, Rooks County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Thomas County, KS, Wallace County, KS, Wichita County, KS, Franklin County, NE, Furnas County, NE, Harlan County, NE, Hitchcock County, NE, Red Willow County, NE
The radar
The Goodland radar (KGLD), 112 km from the middle of the area, began a volume at 04:14 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
- 5%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 11:29 PM CDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins, Sherman, Thomas | 61 min |
| May 7, 11:46 PM CDT | Severe Thunderstorm Warning | GLD | Sherman, Thomas | 44 min |
| May 8, 12:06 AM CDT | Severe Thunderstorm Warning | GLD | Gove, Logan, Sheridan, Thomas | 54 min |
| May 8, 12:29 AM CDT | Severe Thunderstorm Warning | GLD | Gove, Graham, Logan, Sheridan, Thomas | 37 min |
| May 8, 12:35 AM CDT | Severe Thunderstorm Warning | GLD | Cheyenne, Rawlins | 20 min |
| May 8, 12:55 AM CDT | Severe Thunderstorm Warning | GLD | Gove, Greeley, Logan, Wallace, Wichita | 40 min |
| May 8, 1:31 AM CDT | Severe Thunderstorm Warning | GLD | Wichita | 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
Dodge City, (KDDC), launched 00:00Z, 4.2 hours before the alert went out and 212 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
- 13 J/kg
- Mixed-layer CIN
- -240 J/kg
- Mixed-layer LCL
- 2434 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 354 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 10:53 PM CDT | Mesoscale Discussion | SPC | Allen, Barber, Barton, Butler, Chase, Chautauqua and 39 more | 2 hr |
| May 8, 12:02 AM CDT | Severe Thunderstorm Watch | SPC | Allen, Anderson, Barber, Barton, Butler, Chase and 53 more | 8 hr |
| May 8, 2:50 AM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chase, Clark, Comanche, Edwards and 22 more | 55 min |
| May 8, 4:31 AM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Barber, Bourbon, Butler, Chase and 17 more | 59 min |
| May 8, 4:55 AM CDT | Severe Thunderstorm Watch | SPC | Bourbon, Cherokee, Crawford | 7 hr |
| May 8, 7:17 AM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Labette, Neosho | 58 min |
Nearby
Severe Thunderstorm Watches in Kansas, 2009Severe Thunderstorm Watches in Nebraska, 2009Every severe thunderstorm watch in 2009
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.