Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 430, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 9, 2009, 5:31 PM CDT for Alfalfa County, Grant County, Woods County, Oklahoma. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 9, 2009, 5:31 PM CDT (22:31 UTC)
- Expired
- Jun 9, 2009, 6:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
Counties Alfalfa County, OK, Grant County, OK, Woods County, OK
The radar
The Vance AFB radar (KVNX), 11 km from the middle of the area, began a volume at 22:31 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 9, 2:34 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 10.5 hours before the alert went out and 69 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
- 1302 J/kg
- Mixed-layer CIN
- -294 J/kg
- Mixed-layer LCL
- 942 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KOUN 092231 SVROUN OKC003-053-151-092330- /O.NEW.KOUN.SV.W.0430.090609T2231Z-090609T2330Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE NORMAN OK 531 PM CDT TUE JUN 9 2009 THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN GRANT COUNTY IN NORTHERN OKLAHOMA... CENTRAL ALFALFA COUNTY IN NORTHWEST OKLAHOMA... EASTERN WOODS COUNTY IN NORTHWEST OKLAHOMA... * UNTIL 630 PM CDT * AT 531 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR DACOMA...MOVING NORTHEAST AT 30 MPH. HAZARDS IN THE WARNING INCLUDE... HAIL UP TO THE SIZE OF HALF DOLLARS... WIND GUSTS TO 60 MPH... * LOCATIONS IN THE WARNING INCLUDE CHEROKEE...DACOMA...GREAT SALT PLAINS LAKE...INGERSOLL...JET...LAMBERT AND NASH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING. MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF A TORNADO IS SIGHTED. && LAT...LON 3701 9797 3659 9797 3659 9862 3675 9862 TIME...MOT...LOC 2231Z 246DEG 26KT 3669 9855 $$ 30
2 follow-up statements
000 WWUS54 KOUN 092247 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 547 PM CDT TUE JUN 9 2009 OKC151-092257- /O.CAN.KOUN.SV.W.0430.000000T0000Z-090609T2330Z/ WOODS OK- 547 PM CDT TUE JUN 9 2009 ...THE SEVERE THUNDERSTORM WARNING HAS BEEN CANCELLED FOR EASTERN WOODS COUNTY... LAT...LON 3661 9853 3677 9853 3701 9797 3659 9797 TIME...MOT...LOC 2247Z 255DEG 28KT 3673 9838 $$ OKC003-053-092330- /O.CON.KOUN.SV.W.0430.000000T0000Z-090609T2330Z/ ALFALFA OK-GRANT OK- 547 PM CDT TUE JUN 9 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR WESTERN GRANT AND CENTRAL ALFALFA COUNTIES... AT 547 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 3 MILES NORTH OF LAMBERT...MOVING EAST AT 30 MPH. HAZARDS IN THE WARNING INCLUDE... HAIL UP TO THE SIZE OF HALF DOLLARS... WIND GUSTS TO 65 MPH... * LOCATIONS IN THE WARNING INCLUDE CHEROKEE...GREAT SALT PLAINS LAKE...INGERSOLL...JET...LAMBERT AND NASH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING. MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF A TORNADO IS SIGHTED. && LAT...LON 3661 9853 3677 9853 3701 9797 3659 9797 TIME...MOT...LOC 2247Z 255DEG 28KT 3673 9838 $$ 30
000 WWUS54 KOUN 092310 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 610 PM CDT TUE JUN 9 2009 OKC003-053-092330- /O.CON.KOUN.SV.W.0430.000000T0000Z-090609T2330Z/ ALFALFA OK-GRANT OK- 610 PM CDT TUE JUN 9 2009 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT FOR WESTERN GRANT AND EASTERN ALFALFA COUNTIES... AT 609 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM NEAR EXTREME WESTERN GREAT SALT PLAINS LAKE...MOVING EAST AT 25 MPH. ANOTHER SEVERE THUNDERSTORM WAS LOCATED 5 MILES EAST OF AMORITA... MOVING NORTHEAST AT 25 MPH. HAZARDS IN THE WARNING INCLUDE... HAIL UP TO THE SIZE OF QUARTERS... WIND GUSTS TO 60 MPH... * LOCATIONS IN THE WARNING INCLUDE GREAT SALT PLAINS LAKE...JET AND NASH. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING. MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF A TORNADO IS SIGHTED. && LAT...LON 3667 9832 3685 9833 3701 9797 3659 9797 TIME...MOT...LOC 2309Z 259DEG 23KT 3673 9822 $$ 30
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 5:12 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Kingfisher | 63 min |
| Jun 9, 5:36 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 54 min |
| Jun 9, 6:12 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 48 min |
| Jun 9, 6:30 PM CDT | Severe Thunderstorm Warning | OUN | Kay | 26 min |
| Jun 9, 6:59 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 61 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2009Every severe thunderstorm warning 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.