Alert archive / Kansas / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 256
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2001, 5:00 PM CDT for 14 counties in Kansas; Vernon County, Missouri; 13 counties in Oklahoma. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2001, 5:00 PM CDT (22:00 UTC)
- Expired
- May 20, 2001, 9:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
All 28 counties
Allen County, KS, Bourbon County, KS, Butler County, KS, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Elk County, KS, Greenwood County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Vernon County, MO, Craig County, OK, Delaware County, OK, Kay County, OK, Mayes County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 103 km from the middle of the area, began a volume at 22:01 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.
Warnings issued inside it
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 5:10 PM CDT | Severe Thunderstorm Warning | ICT | Greenwood | 60 min |
| May 20, 5:14 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 61 min |
| May 20, 5:32 PM CDT | Tornado Warning | TSA | Osage | 43 min |
| May 20, 5:46 PM CDT | Severe Thunderstorm Warning | ICT | Cowley | 59 min |
| May 20, 5:46 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 44 min |
| May 20, 5:51 PM CDT | Severe Thunderstorm Warning | TSA | Rogers, Wagoner | 39 min |
| May 20, 6:12 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 48 min |
| May 20, 6:13 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 62 min |
| May 20, 6:16 PM CDT | Tornado Warning | TSA | Osage | 44 min |
| May 20, 6:33 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Mayes, Rogers | 57 min |
| May 20, 6:41 PM CDT | Tornado Warning | TSA | Washington | 49 min |
| May 20, 6:43 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 62 min |
| May 20, 6:56 PM CDT | Tornado Warning | TSA | Mayes | 49 min |
| May 20, 6:59 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 46 min |
| May 20, 7:06 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 54 min |
| May 20, 7:17 PM CDT | Severe Thunderstorm Warning | TSA | Ottawa | 28 min |
| May 20, 7:23 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 67 min |
| May 20, 7:30 PM CDT | Severe Thunderstorm Warning | TSA | Tulsa, Washington | 45 min |
| May 20, 7:32 PM CDT | Severe Thunderstorm Warning | TSA | Craig | 43 min |
| May 20, 8:27 PM CDT | Severe Thunderstorm Warning | TSA | Mayes | 63 min |
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 10.0 hours before the alert went out and 101 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
- 186 J/kg
- Mixed-layer CIN
- -106 J/kg
- Mixed-layer LCL
- 769 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 1:15 PM CDT | Severe Thunderstorm Watch | SPC | Dunklin, Pemiscot | 5 hr |
| May 19, 10:00 PM CDT | Severe Thunderstorm Watch | SPC | Bryan, Carter, Choctaw, Johnston, Love, McCurtain and 1 more | 5 hr |
| May 20, 3:30 PM CDT | Tornado Watch | SPC | Adair, Atoka, Carter, Cherokee, Choctaw, Cleveland and 27 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Kansas, 2001Severe Thunderstorm Watches in Oklahoma, 2001Severe Thunderstorm Watches in Missouri, 2001Every severe thunderstorm watch in 2001
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.