Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 421, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Aug 9, 2012, 3:34 PM CDT for Atoka County, Oklahoma. It was in force for 41 min. 1 report 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
- Aug 9, 2012, 3:34 PM CDT (20:34 UTC)
- Expired
- Aug 9, 2012, 4:15 PM CDT
- In force
- 41 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
County Atoka County, OK
The radar
The Norman radar (KTLX), 172 km from the middle of the area, began a volume at 20:34 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 |
|---|---|---|---|
| Aug 9, 3:40 PM CDT | TSTM WND GST 69 | 1 Wnw Lane, OK |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 8.6 hours before the alert went out and 172 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
- 538 J/kg
- Mixed-layer CIN
- -280 J/kg
- Mixed-layer LCL
- 1618 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 219 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
049
WUUS54 KOUN 092034
SVROUN
OKC005-092115-
/O.NEW.KOUN.SV.W.0421.120809T2034Z-120809T2115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
334 PM CDT THU AUG 9 2012
THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHEASTERN ATOKA COUNTY IN SOUTHEAST OKLAHOMA...
* UNTIL 415 PM CDT
* AT 329 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
DAMAGING WINDS IN EXCESS OF 65 MPH. THIS STORM WAS LOCATED NEAR
LANE...MOVING SOUTHEAST AT 20 MPH.
* LOCATIONS IMPACTED INCLUDE...
LANE AND MCGEE CREEK LAKE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.
&&
LAT...LON 3416 9598 3429 9612 3442 9597 3431 9578
3416 9578
TIME...MOT...LOC 2029Z 311DEG 18KT 3433 9600
$$2 follow-up statements
057
WWUS54 KOUN 092047
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
347 PM CDT THU AUG 9 2012
OKC005-092115-
/O.CON.KOUN.SV.W.0421.000000T0000Z-120809T2115Z/
ATOKA OK-
347 PM CDT THU AUG 9 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM
CDT FOR SOUTHEASTERN ATOKA COUNTY...
AT 344 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL AND
DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED NEAR
LANE...MOVING SOUTHEAST AT 25 MPH.
LOCATIONS IMPACTED INCLUDE...
LANE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MOVE INSIDE A STURDY BUILDING UNTIL THE STORM HAS PASSED.
&&
LAT...LON 3416 9599 3426 9610 3435 9596 3431 9578
3416 9578
TIME...MOT...LOC 2044Z 323DEG 20KT 3424 9595
$$631
WWUS54 KOUN 092110
SVSOUN
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
410 PM CDT THU AUG 9 2012
OKC005-092120-
/O.EXP.KOUN.SV.W.0421.000000T0000Z-120809T2115Z/
ATOKA OK-
410 PM CDT THU AUG 9 2012
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ATOKA COUNTY
WILL EXPIRE AT 415 PM CDT...
THE STORM WHICH PROMPTED THE WARNING HAD MOVED OUT OF THE AREA.
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.
LAT...LON 3415 9599 3426 9610 3435 9596 3431 9578
3415 9578
TIME...MOT...LOC 2110Z 311DEG 18KT 3424 9595
$$The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 7:00 PM CDT | Severe Thunderstorm Warning | OUN | Atoka | 15 min |
| Aug 8, 7:18 PM CDT | Special Weather Statement | OUN | Atoka, Coal | 42 min |
| Aug 8, 7:43 PM CDT | Special Weather Statement | OUN | Atoka | 32 min |
| Aug 9, 1:43 PM CDT | Red Flag Warning | OUN | Beckham, Blaine, Caddo, Canadian, Carter, Cleveland and 23 more | 5 hr |
| Aug 9, 3:29 PM CDT | Special Weather Statement | OUN | Atoka | 46 min |
| Aug 9, 3:53 PM CDT | Severe Thunderstorm Warning | OUN | Bryan | 52 min |
| Aug 9, 4:49 PM CDT | Special Weather Statement | OUN | Bryan | 26 min |
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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.