Alert archive / Oklahoma / Tornado Warnings in 2012
Tornado Warning 42, NWS Norman, OK
NWS Norman, OK issued this tornado warning at Apr 30, 2012, 8:39 PM CDT for Grant County, Oklahoma. It was in force for 51 min. 5 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
- Apr 30, 2012, 8:39 PM CDT (01:39 UTC)
- Expired
- Apr 30, 2012, 9:30 PM CDT
- In force
- 51 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
County Grant County, OK
The radar
The Vance AFB radar (KVNX), 38 km from the middle of the area, began a volume at 01:42 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 |
|---|---|---|---|
| Apr 30, 9:01 PM CDT | TORNADO | 3 Sw Medford, OK | THIS TORNADO DEVELOPED SOUTHWEST OF MEDFORD AND MOVED NORTHEAST. THE MESONET SITE 1 MILES SOUTHWEST OF MEDFORD REPORTED A WIND GUST OF 84 MPH AT 2110 CDT. THE TORNADO LIKELY MOVED JUST SOUTH OF THE SITE, AS WELL AS SOUTH OF THE TOWN OF MEDFORD. THE TORNADO CON |
| Apr 30, 9:06 PM CDT | TORNADO | 2 Sw Medford, OK | |
| Apr 30, 9:10 PM CDT | TSTM WND GST 84 | 1 Sw Medford, OK | THE WIND GUST OCCURRED AS A LIKELY TORNADO MOVED SOUTH OF THE SITE. |
| Apr 30, 9:15 PM CDT | TSTM WND GST 58 | 1 Sw Medford, OK | |
| Apr 30, 9:30 PM CDT | TSTM WND GST 65 | 1 Sw Medford, OK |
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 |
|---|---|---|---|
| Apr 30, 7:30 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 1.7 hours before the alert went out and 34 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
- 2077 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1205 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 246 m²/s²
- Significant tornado parameter
- 2.4
- Supercell composite
- 16.5
The text
As transmitted, in the capitals the NWS used until 2016.
351 WFUS54 KOUN 010139 TOROUN OKC053-010230- /O.NEW.KOUN.TO.W.0042.120501T0139Z-120501T0230Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE NORMAN OK 839 PM CDT MON APR 30 2012 THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A * TORNADO WARNING FOR... GRANT COUNTY IN OKLAHOMA... * UNTIL 930 PM CDT * AT 833 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORMS WITH STRONG ROTATION 8 MILES WEST OF JEFFERSON...MOVING EAST AT 15 MPH. STORM SPOTTERS HAVE REPORTED AT LEAST TWO TORNADOES WITH THIS STORM. * LOCATIONS IMPACTED INCLUDE... MEDFORD...LAMONT...WAKITA...JEFFERSON AND RENFROW. PRECAUTIONARY/PREPAREDNESS ACTIONS... THE TORNADO WILL BE VERY DIFFICULT TO SEE IN THE DARK. DO NOT WAIT. TAKE COVER NOW. && LAT...LON 3697 9754 3669 9752 3667 9800 3696 9800 TIME...MOT...LOC 0133Z 257DEG 13KT 3675 9794 $$
2 follow-up statements
230 WWUS54 KOUN 010200 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 900 PM CDT MON APR 30 2012 OKC053-010230- /O.CON.KOUN.TO.W.0042.000000T0000Z-120501T0230Z/ GRANT OK- 900 PM CDT MON APR 30 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR GRANT COUNTY... AT 852 PM CDT...NATIONAL WEATHER SERVICE RADAR DETECTED A TORNADO ABOUT 8 MILES WEST OF MEDFORD AND 5 MILES SOUTHEAST OF WAKITA...MOVING NORTHEAST AT 15 MPH. ON THE CURRENT PATH...THE MOST DANGEROUS PART OF THIS STORM WILL PASS JUST WEST AND NORTH OF MEDFORD. ANOTHER CIRCULATION MAY BE TRYING TO FORM SOUTHWEST OF MEDFORD. LOCATIONS IMPACTED INCLUDE... MEDFORD...WAKITA AND RENFROW. PRECAUTIONARY/PREPAREDNESS ACTIONS... GET IN...GET DOWN AND COVER UP. TAKE COVER NOW IN A STORM SHELTER OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND WINDOWS. THE TORNADO WILL BE VERY DIFFICULT TO SEE IN THE DARK. DO NOT WAIT. TAKE COVER NOW. && LAT...LON 3697 9754 3672 9753 3676 9793 3696 9800 TIME...MOT...LOC 0152Z 233DEG 15KT 3680 9786 $$
123 WWUS54 KOUN 010210 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 910 PM CDT MON APR 30 2012 OKC053-010230- /O.CON.KOUN.TO.W.0042.000000T0000Z-120501T0230Z/ GRANT OK- 910 PM CDT MON APR 30 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 930 PM CDT FOR GRANT COUNTY... AT 906 PM CDT...NATIONAL WEATHER SERVICE RADAR AND STORM SPOTTERS DETECT A TORNADO ABOUT 2 MILES SOUTHWEST OF MEDFORD MOVING EAST AND NORTHEAST AT 25 MPH. ANOTHER TORNADO WAS LIKELY LOCATED 5 MILES SOUTHEAST OF WAKITA MOVING NORTH AT 30 MPH. LOCATIONS IMPACTED INCLUDE... MEDFORD...WAKITA AND RENFROW. PRECAUTIONARY/PREPAREDNESS ACTIONS... GET IN...GET DOWN AND COVER UP. TAKE COVER NOW IN A STORM SHELTER OR AN INTERIOR ROOM OF A STURDY BUILDING. STAY AWAY FROM DOORS AND WINDOWS. THE TORNADO WILL BE VERY DIFFICULT TO SEE IN THE DARK. DO NOT WAIT. TAKE COVER NOW. && LAT...LON 3697 9754 3672 9753 3676 9793 3696 9800 TIME...MOT...LOC 0206Z 174DEG 15KT 3686 9789 $$
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:14 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 46 min |
| Apr 30, 7:26 PM CDT | Tornado Warning | OUN | Alfalfa | 34 min |
| Apr 30, 7:32 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods | 58 min |
| Apr 30, 7:54 PM CDT | Special Weather Statement | OUN | Harmon | 36 min |
| Apr 30, 7:58 PM CDT | Tornado Warning | OUN | Alfalfa, Grant | 47 min |
| Apr 30, 8:09 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Harmon | 66 min |
| Apr 30, 8:17 PM CDT | Special Weather Statement | OUN | Greer, Washita | 28 min |
| Apr 30, 8:23 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Greer, Kiowa, Washita | 67 min |
| Apr 30, 8:27 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods | 63 min |
| Apr 30, 9:08 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Grant | 52 min |
| Apr 30, 9:10 PM CDT | Tornado Warning | OUN | Kiowa, Washita | 16 min |
| Apr 30, 9:13 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson | 62 min |
| Apr 30, 9:28 PM CDT | Tornado Warning | OUN | Grant, Kay | 32 min |
| Apr 30, 9:32 PM CDT | Special Weather Statement | OUN | Kiowa | 43 min |
| Apr 30, 9:39 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Greer, Jackson, Kiowa, Washita | 51 min |
| Apr 30, 9:40 PM CDT | Tornado Warning | OUN | Grant | 35 min |
| Apr 30, 9:57 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 48 min |
| Apr 30, 9:58 PM CDT | Tornado Warning | OUN | Grant, Kay | 47 min |
| Apr 30, 10:04 PM CDT | Flash Flood Warning | OUN | Grant, Kay | 4 hr |
| Apr 30, 10:05 PM CDT | Areal Flood Advisory | OUN | Greer, Harmon, Jackson | 4 hr |
| Apr 30, 10:15 PM CDT | Severe Thunderstorm Warning | OUN | Greer, Harmon, Jackson, Kiowa | 60 min |
| Apr 30, 10:18 PM CDT | Tornado Warning | OUN | Kay | 27 min |
| Apr 30, 10:20 PM CDT | Tornado Warning | OUN | Greer, Harmon, Jackson | 14 min |
| Apr 30, 10:33 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Cotton, Grady, Kiowa, Stephens and 2 more | 57 min |
| Apr 30, 10:36 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Noble | 54 min |
| Apr 30, 10:54 PM CDT | Special Weather Statement | OUN | Blaine, Canadian, Custer, Dewey, Kingfisher | 51 min |
| Apr 30, 11:11 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Comanche, Greer, Harmon, Jackson, Kiowa and 1 more | 53 min |
| Apr 30, 11:25 PM CDT | Special Weather Statement | OUN | Lincoln | 35 min |
| Apr 30, 11:28 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kay, Noble | 51 min |
| Apr 30, 11:30 PM CDT | Special Weather Statement | OUN | Comanche, Grady, McClain, Stephens | 60 min |
| Apr 30, 11:32 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Cleveland, Grady, McClain, Oklahoma | 43 min |
| Apr 30, 11:57 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Lincoln, Oklahoma, Pottawatomie | 48 min |
| May 1, 12:12 AM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Pottawatomie, Seminole | 34 min |
| May 1, 12:25 AM CDT | Special Weather Statement | OUN | Dewey | 35 min |
| May 1, 12:30 AM CDT | Special Weather Statement | OUN | Garvin, McClain, Murray, Pontotoc | 30 min |
| May 1, 12:51 AM CDT | Special Weather Statement | OUN | Pottawatomie, Seminole | 39 min |
| May 1, 12:57 AM CDT | Special Weather Statement | OUN | Garvin, Murray, Pontotoc | 33 min |
| May 1, 1:29 AM CDT | Special Weather Statement | OUN | Coal, Hughes, Johnston, Pontotoc, Seminole | 46 min |
| May 1, 2:11 AM CDT | Special Weather Statement | OUN | Coal | 49 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.