Alert archive / Oklahoma / Tornado Warnings in 2012
Tornado Warning 2, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Mar 18, 2012, 6:54 PM CDT for Greer County, Oklahoma. It was in force for 36 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Mar 18, 2012, 6:54 PM CDT (23:54 UTC)
- Expired
- Mar 18, 2012, 7:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
County Greer County, OK
The radar
The Altus AFB radar (KFDR), 89 km from the middle of the area, began a volume at 23:54 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 18, 6:54 PM CDT | TORNADO | 8 Nw Mangum, OK | TIME AND LOCATION APPROXIMATE |
| Mar 18, 7:27 PM CDT | TORNADO | 3 Wnw Willow, OK | TIME AND LOCATION APPROXIMATE |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 18, 3:12 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 11.9 hours before the alert went out and 197 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
- 1066 J/kg
- Mixed-layer CIN
- -188 J/kg
- Mixed-layer LCL
- 832 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted, in the capitals the NWS used until 2016.
990 WFUS54 KOUN 182354 TOROUN OKC055-190030- /O.NEW.KOUN.TO.W.0002.120318T2354Z-120319T0030Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NORMAN OK 654 PM CDT SUN MAR 18 2012 THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A * TORNADO WARNING FOR... GREER COUNTY IN SOUTHWESTERN OKLAHOMA... * UNTIL 730 PM CDT * AT 650 PM CDT...RADAR AND STORM SPOTTERS OBSERVED A TORNADO 10 MILES WEST OF MANGUM. THE TORNADO WAS MOVING NORTHEAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... WILLOW AND BRINKMAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 3512 9951 3500 9934 3485 9967 3495 9974 TIME...MOT...LOC 2350Z 227DEG 23KT 3491 9968 $$ WR
2 follow-up statements
369 WWUS54 KOUN 182359 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 659 PM CDT SUN MAR 18 2012 OKC055-190030- /O.CON.KOUN.TO.W.0002.000000T0000Z-120319T0030Z/ GREER OK- 659 PM CDT SUN MAR 18 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR GREER COUNTY... AT 654 PM CDT...RADAR AND TRAINED WEATHER SPOTTERS OVSERVED A TORNADO. THIS TORNADIC STORM WAS LOCATED 8 MILES NORTHWEST OF MANGUM...MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... WILLOW AND BRINKMAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. THIS TORNADO IS LIKELY OBSCURED BY RAIN AND MAY NOT BE VISIBLE. DO NOT WAIT TO SEE OR HEAR THE TORNADO. TAKE COVER NOW. ABANDON MOBILE HOMES AND VEHICLES. IF POSSIBLE...MOVE TO A BASEMENT OR STORM SHELTER. OTHERWISE MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS. && LAT...LON 3512 9951 3500 9934 3485 9967 3495 9974 TIME...MOT...LOC 2354Z 226DEG 25KT 3494 9964 $$ WR
506 WWUS54 KOUN 190016 SVSOUN SEVERE WEATHER STATEMENTNATIONAL WEATHER SERVICE NORMAN OK715 PM CDT SUN MAR 18 2012 OKC055-190030- /O.CON.KOUN.TO.W.0002.000000T0000Z-120319T0030Z/ GREER OK- 716 PM CDT SUN MAR 18 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR NORTH CENTRAL GREER COUNTY... AT 712 PM CDT...DOPPLER RADAR INDICATED A TORNADO. THE TORNADO WAS LOCATED ABOUT 4 MILES WEST OF BRINKMAN MOVING NORTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... WILLOW AND BRINKMAN. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. && LAT...LON 3500 9967 3512 9951 3502 9939 3493 9961 TIME...MOT...LOC 0012Z 227DEG 23KT 2849 10717 $$
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 18, 4:02 AM CDT | Wind Advisory | OUN | Alfalfa, Custer, Dewey, Ellis, Harper, Major and 3 more | 18 hr |
| Mar 18, 4:39 PM CDT | Special Weather Statement | OUN | Harmon | 36 min |
| Mar 18, 4:55 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson | 65 min |
| Mar 18, 5:58 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon | 62 min |
| Mar 18, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Jackson, Tillman | 64 min |
| Mar 18, 6:31 PM CDT | Special Weather Statement | OUN | Roger Mills | 29 min |
Nearby
Tornado Warnings in Oklahoma, 2012Every tornado warning in 2012Tornadoes in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.