Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 151, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 15, 2012, 2:34 AM CDT for 9 counties in Oklahoma. It was in force for 56 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
- Apr 15, 2012, 2:34 AM CDT (07:34 UTC)
- Expired
- Apr 15, 2012, 3:30 AM CDT
- In force
- 56 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
Counties Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Grady County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Oklahoma County, OK
The radar
The Norman radar (KTLX), 88 km from the middle of the area, began a volume at 07:35 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 |
|---|---|---|---|
| Apr 14, 10:29 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Apr 15, 1:37 AM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 7.6 hours before the alert went out and 76 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
- 2138 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 752 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 442 m²/s²
- 0-3 km storm-relative helicity
- 585 m²/s²
- Significant tornado parameter
- 6.7
- Supercell composite
- 26.3
The text
As transmitted, in the capitals the NWS used until 2016.
131
WUUS54 KOUN 150734
SVROUN
OKC011-015-017-031-051-073-075-083-109-150830-
/O.NEW.KOUN.SV.W.0151.120415T0734Z-120415T0830Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
234 AM CDT SUN APR 15 2012
THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EXTREME SOUTHEASTERN BLAINE COUNTY IN WEST CENTRAL OKLAHOMA...
CADDO COUNTY IN SOUTHWESTERN OKLAHOMA...
CANADIAN COUNTY IN CENTRAL OKLAHOMA...
EXTREME NORTH CENTRAL COMANCHE COUNTY IN SOUTHWESTERN OKLAHOMA...
GRADY COUNTY IN SOUTH CENTRAL OKLAHOMA...
KINGFISHER COUNTY IN NORTH CENTRAL OKLAHOMA...
EXTREME EAST CENTRAL KIOWA COUNTY IN SOUTHWESTERN OKLAHOMA...
LOGAN COUNTY IN CENTRAL OKLAHOMA...
WEST CENTRAL OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...
* UNTIL 330 AM CDT
* AT 230 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL AND DAMAGING WINDS IN EXCESS OF 65 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM 7 MILES NORTHEAST OF LOYAL TO
7 MILES NORTHWEST OF MEERS...MOVING EAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
EL RENO...CHICKASHA...KINGFISHER...YUKON...BETHANY...CONCHO...
MUSTANG...WARR ACRES...ANADARKO...TUTTLE...PIEDMONT...HINTON...
HENNESSEY...MINCO...CARNEGIE...APACHE...UNION CITY...CRESCENT...
RUSH SPRINGS AND GEARY.
THIS INCLUDES THE FOLLOWING HIGHWAYS...
INTERSTATE 40 BETWEEN MILE MARKERS 99 AND 145.
INTERSTATE 44 BETWEEN MILE MARKERS 52 AND 100.
AT TIMES LOCAL SECTIONS OF THIS LINE MAY PRODUCE VERY STRONG WIND
GUSTS OVER 75 MPH. THESE PHENOMENA WILL BE BRIEF BUT WILL
OCCASIONALLY OCCUR ON THE LEADING EDGE OF THIS LONG LINE OF
THUNDERSTORMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO WARNING. GET
TO A STORM SHELTER OR STURDY BUILDING IF A TORNADO APPROACHES.
&&
LAT...LON 3474 9787 3478 9880 3512 9863 3510 9862
3510 9862 3615 9811 3615 9736
TIME...MOT...LOC 0730Z 278DEG 30KT 3607 9806 3484 9869
$$
WR2 follow-up statements
215 WWUS54 KOUN 150800 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 300 AM CDT SUN APR 15 2012 OKC011-015-017-031-051-073-075-083-109-150830- /O.CON.KOUN.SV.W.0151.000000T0000Z-120415T0830Z/ BLAINE OK-OKLAHOMA OK-KINGFISHER OK-COMANCHE OK-GRADY OK-CADDO OK- CANADIAN OK-KIOWA OK-LOGAN OK- 300 AM CDT SUN APR 15 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 AM CDT FOR EXTREME SOUTHEASTERN BLAINE...WESTERN OKLAHOMA... KINGFISHER...EXTREME NORTHEASTERN COMANCHE...GRADY...CADDO... CANADIAN...EXTREME EAST CENTRAL KIOWA AND LOGAN COUNTIES... AT 258 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF LOVELL TO LAKE ELLSWORTH... MOVING EAST AT 35 MPH. LOCATIONS IMPACTED INCLUDE... EL RENO...CHICKASHA...KINGFISHER...YUKON...BETHANY...CONCHO... MUSTANG...WARR ACRES...ANADARKO...TUTTLE...PIEDMONT...HINTON... HENNESSEY...MINCO...APACHE...UNION CITY...CRESCENT...RUSH SPRINGS... ELGIN AND CYRIL. THIS INCLUDES THE FOLLOWING HIGHWAYS... INTERSTATE 40 BETWEEN MILE MARKERS 103 AND 144. INTERSTATE 44 BETWEEN MILE MARKERS 52 AND 99. AT TIMES LOCAL SECTIONS OF THIS LINE MAY PRODUCE VERY STRONG WIND GUSTS OVER 70 MPH. THESE PHENOMENA WILL BE BRIEF BUT WILL OCCASIONALLY OCCUR ON THE LEADING EDGE OF THIS LONG LINE OF THUNDERSTORMS. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO WARNING. GET TO A STORM SHELTER OR STURDY BUILDING IF A TORNADO APPROACHES. && LAT...LON 3615 9736 3474 9789 3479 9876 3615 9799 TIME...MOT...LOC 0758Z 273DEG 30KT 3610 9775 3481 9842 $$ WR
508 WWUS54 KOUN 150828 SVSOUN SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 328 AM CDT SUN APR 15 2012 OKC051-073-109-075-017-015-011-031-083-150840- /O.EXP.KOUN.SV.W.0151.000000T0000Z-120415T0830Z/ BLAINE OK-OKLAHOMA OK-KINGFISHER OK-COMANCHE OK-GRADY OK-CADDO OK- CANADIAN OK-KIOWA OK-LOGAN OK- 328 AM CDT SUN APR 15 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EXTREME SOUTHEASTERN BLAINE... WESTERN OKLAHOMA...KINGFISHER...EXTREME NORTHEASTERN COMANCHE... GRADY...CADDO...CANADIAN...EXTREME EAST CENTRAL KIOWA AND LOGAN COUNTIES WILL EXPIRE AT 330 AM CDT... THE LINE OF STORMS WHICH PROMPTED THE WARNING HAD WEAKENED...AND WAS NO LONGER SEVERE. THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE. HOWEVER GUSTY WINDS TO 55 MPH ARE STILL POSSIBLE WITH THESE THUNDERSTORMS. LAT...LON 3615 9736 3474 9789 3479 9876 3615 9799 TIME...MOT...LOC 0827Z 278DEG 30KT 3610 9775 3481 9842 $$ WR
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:06 PM CDT | Tornado Warning | OUN | Alfalfa, Woods | 54 min |
| Apr 14, 7:09 PM CDT | Tornado Warning | OUN | Major, Woods | 36 min |
| Apr 14, 7:35 PM CDT | Tornado Warning | OUN | Alfalfa, Woods | 40 min |
| Apr 14, 8:07 PM CDT | Tornado Warning | OUN | Alfalfa | 38 min |
| Apr 14, 10:35 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woods, Woodward | 40 min |
| Apr 14, 10:56 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills, Woodward | 49 min |
| Apr 14, 11:13 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Harper, Woods, Woodward | 62 min |
| Apr 14, 11:19 PM CDT | Special Weather Statement | OUN | Alfalfa, Beckham, Dewey | 56 min |
| Apr 14, 11:41 PM CDT | Severe Thunderstorm Warning | OUN | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 3 more | 64 min |
| Apr 14, 11:53 PM CDT | Severe Thunderstorm Warning | OUN | Ellis, Roger Mills, Woodward | 37 min |
| Apr 15, 12:00 AM CDT | Tornado Warning | OUN | Ellis, Harper, Woodward | 30 min |
| Apr 15, 12:03 AM CDT | Tornado Warning | OUN | Beckham, Roger Mills | 27 min |
| Apr 15, 12:16 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Ellis, Harper, Major, Woods, Woodward | 59 min |
| Apr 15, 12:16 AM CDT | Tornado Warning | OUN | Ellis, Harper, Woodward | 29 min |
| Apr 15, 12:33 AM CDT | Tornado Warning | OUN | Custer, Dewey, Roger Mills | 42 min |
| Apr 15, 12:39 AM CDT | Severe Thunderstorm Warning | OUN | Beckham, Custer, Dewey, Ellis, Greer, Harmon and 5 more | 66 min |
| Apr 15, 12:42 AM CDT | Tornado Warning | OUN | Harper, Woods, Woodward | 33 min |
| Apr 15, 1:15 AM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Dewey, Grant, Major, Woods, Woodward | 60 min |
| Apr 15, 1:29 AM CDT | Special Weather Statement | OUN | Blaine, Caddo, Kingfisher, Tillman | 61 min |
| Apr 15, 1:36 AM CDT | Severe Thunderstorm Warning | OUN | Blaine, Caddo, Canadian, Comanche, Custer, Dewey and 3 more | 54 min |
| Apr 15, 1:41 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Jackson, Kiowa, Tillman | 64 min |
| Apr 15, 2:37 AM CDT | Special Weather Statement | OUN | Lincoln, McClain, Payne, Pottawatomie | 68 min |
| Apr 15, 2:44 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Grady, Jefferson, Stephens, Tillman | 45 min |
| Apr 15, 3:06 AM CDT | Special Weather Statement | OUN | Kay, Noble | 24 min |
| Apr 15, 3:36 AM CDT | Special Weather Statement | OUN | Grady, Kay, Logan, McClain, Noble, Oklahoma and 1 more | 54 min |
| Apr 15, 3:40 AM CDT | Special Weather Statement | OUN | Jefferson, Stephens | 65 min |
| Apr 15, 4:35 AM CDT | Special Weather Statement | OUN | Cleveland, Garvin, Lincoln, Payne, Pottawatomie, Seminole | 55 min |
| Apr 15, 4:37 AM CDT | Special Weather Statement | OUN | Carter, Garvin, Johnston, Love, Marshall, Murray and 1 more | 53 min |
| Apr 15, 5:36 AM CDT | Special Weather Statement | OUN | Coal, Hughes, Pontotoc, Seminole | 54 min |
| Apr 15, 6:52 AM CDT | Special Weather Statement | OUN | Atoka, Coal, Hughes | 23 min |
| Apr 15, 7:53 AM CDT | Severe Thunderstorm Warning | OUN | Bryan | 52 min |
| Apr 15, 8:27 AM CDT | Severe Thunderstorm Warning | OUN | Atoka | 48 min |
| Apr 15, 9:03 AM CDT | Special Weather Statement | OUN | Bryan | 27 min |
| Apr 15, 9:34 AM CDT | Special Weather Statement | OUN | Atoka | 26 min |
| Apr 15, 11:00 AM CDT | Wind Advisory | OUN | Alfalfa, Beckham, Blaine, Custer, Dewey, Ellis and 11 more | 6 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2012Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.