Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 364, NWS Norman, OK

May 21, 20134 counties in Oklahoma; Hardeman County, Texas

NWS Norman, OK issued this severe thunderstorm warning at May 21, 2013, 9:16 AM CDT for 4 counties in Oklahoma; Hardeman County, Texas. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 21, 2013, 9:16 AM CDT (14:16 UTC)
Expired: May 21, 2013, 10:00 AM CDT
In force: 44 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

Counties Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Hardeman County, TX

The radar

The Altus AFB radar (KFDR), 76 km from the middle of the area, began a volume at 14:16 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 forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 21, 6:28 AM CDT, 2 hours 48 minutes earlier.

Area forecast discussion, May 21, 6:28 AM CDT, 2 hours 48 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
628 AM CDT TUE MAY 21 2013

.DISCUSSION...
12Z AVIATION DISCUSSION FOLLOWS....

&&

.AVIATION...
A VERY SLOWLY MOVING COLD FRONT HAS LIT UP WITH CONVECTION
OVERNIGHT...AND THESE STORMS ARE LIKELY TO CONTINUE ALONG THE
FRONT ALL DAY AND INTO THE EVENING. THE FRONT...AND THE AREA OF
STORMS...SHOULD MOVE SLOWLY SE THE REST OF THE DAY. HOWEVER...SOME
NORTHWARD DEVELOPMENT IS NOT OUT OF THE QUESTION THIS MORNING. IN
ANY CASE...TSRA SHOULD REMAIN S OF KPNC...KGAG...AND KWWR. THE
STORMS ARE EXPECTED TO MOVE SE OF OUR FORECAST AREA THIS
EVENING...LEAVING CLEARING SKIES AND LIGHT WINDS AT MOST SITES.
RECENT RAINS SUGGEST THAT SOME BR IS A GOOD POSSIBILITY TOWARD
SUNRISE AT ALL BUT OUR WESTERN SITES. WINDS WILL TURN AROUND TO S
OVERNIGHT OR TOMORROW MORNING.

&&

.PREV DISCUSSION... /ISSUED 322 AM CDT TUE MAY 21 2013/

DISCUSSION...
EARLY MODEL DIVERGENCE AND PERIODIC CONVECTIVE ACTIVITY WILL LEAD
TO A VERY LOW-CONFIDENCE FORECAST...ESPECIALLY AFTER SATURDAY.

THE SYNOPTIC-SCALE STORM SYSTEM THAT HAS PLAGUED OKLAHOMA AND
NORTH TEXAS WITH SEVERE WEATHER OVER THE PAST COUPLE OF DAYS HAS
SHIFTED SLIGHTLY TO THE SOUTHEAST. STORMS ARE LIKELY TO CONTINUE
TODAY...WITH PRIMARY EMPHASIS ACROSS THE SOUTHEAST PARTS OF OUR
FORECAST AREA. THE RISK OF SEVERE STORMS WILL BE MAINLY CONFINED
TO THE SOUTHEAST HALF OF OKLAHOMA...AND NORTH TEXAS FROM WICHITA
FALLS EAST.

THE COOLER AIR BEHIND THE SURFACE COLD FRONT WILL FINALLY MOVE
FARTHER SOUTH FOR WEDNESDAY...REDUCING THE CHANCES FOR STORMS FOR
A DAY OR TWO.

SOUTHERLY FLOW WILL BRING WARMTH AND MOISTURE BACK INTO NORTH
TEXAS AND OKLAHOMA LATE THIS WEEK. THIS WILL BRING ANOTHER SERIES
OF CHANCES FOR RAIN AS A LONG PARADE OF SHORTWAVE TROUGHS PASS
OVER THE SOUTHERN PLAINS WITHIN THE LONGWAVE TROUGH ANCHORED OVER
WESTERN NORTH AMERICA. EVEN IF THE MODEL FORECASTS WERE IN BETTER
AGREEMENT...THE TIMING OF SUCH WAVES IS DIFFICULT IN THIS TIME
FRAME.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  75  55  80  61 /  60  10  10  20
HOBART OK         78  54  87  61 /  40  10  10  20
WICHITA FALLS TX  81  57  89  64 /  60  10  10  10
GAGE OK           81  51  85  56 /  10  10  20  20
PONCA CITY OK     77  53  79  57 /  20  10  10  20
DURANT OK         82  60  85  64 /  80  40  10  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
TX...NONE.
&&

17/23/23

Hazardous weather outlook, May 21, 5:00 AM CDT, 4 hours 16 minutes before

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In the hours before

Special weather statement, May 21, 8:18 AM CDT, 58 minutes before

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Special weather statement, May 21, 8:24 AM CDT, 52 minutes before

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Special weather statement, May 21, 8:34 AM CDT, 42 minutes before

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Special weather statement, May 21, 8:40 AM CDT, 36 minutes before

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Special weather statement, May 21, 8:56 AM CDT, 20 minutes before

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Special weather statement, May 21, 8:58 AM CDT, 18 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
858 AM CDT TUE MAY 21 2013

OKZ033-034-036-TXZ083-211445-
HARMON OK-GREER OK-JACKSON OK-HARDEMAN TX-
858 AM CDT TUE MAY 21 2013

...SIGNIFICANT WEATHER ADVISORY FOR HARMON...CENTRAL GREER...WESTERN
JACKSON AND NORTHERN HARDEMAN COUNTIES UNTIL 945 AM CDT...

AT 854 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING FROM
4 MILES WEST OF DODSON TO 3 MILES NORTHEAST OF TELL...MOVING EAST AT
50 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 50 MPH...
HEAVY RAINFALL...
FREQUENT CLOUD TO GROUND LIGHTNING...

LAT...LON 3490 10000 3507 9947 3441 9963 3438 9999
TIME...MOT...LOC 1354Z 253DEG 45KT 3477 10009 3441 10035

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 7:01 PM CDT	Tornado Warning	OUN	Carter, Love, Marshall	44 min
May 20, 7:19 PM CDT	Tornado Warning	OUN	Johnston, Marshall	26 min
May 20, 7:35 PM CDT	River Flood Warning	OUN	Oklahoma	3 hr
May 20, 7:37 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal, Johnston	68 min
May 20, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Bryan, Johnston, Marshall	50 min
May 20, 7:44 PM CDT	Tornado Warning	OUN	Atoka, Coal, Johnston	46 min
May 20, 7:55 PM CDT	Severe Thunderstorm Warning	OUN	Love	50 min
May 20, 8:11 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	49 min
May 20, 8:28 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall	47 min
May 20, 9:06 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston	39 min
May 20, 9:09 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall, Murray	51 min
May 20, 9:17 PM CDT	Special Weather Statement	OUN	Oklahoma	28 min
May 20, 9:30 PM CDT	Areal Flood Advisory	OUN	Carter, Johnston	3 hr
May 20, 9:44 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	46 min
May 20, 10:00 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton	45 min
May 20, 10:04 PM CDT	Tornado Warning	OUN	Atoka, Bryan	26 min
May 20, 10:25 PM CDT	Tornado Warning	OUN	Atoka	35 min
May 20, 10:33 PM CDT	Special Weather Statement	OUN	Coal	27 min
May 20, 10:38 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	52 min
May 20, 10:46 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens	44 min
May 20, 11:20 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	25 min
May 20, 11:25 PM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray, Pontotoc	50 min
May 20, 11:28 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	47 min
May 20, 11:50 PM CDT	Special Weather Statement	OUN	McClain	25 min
May 20, 11:58 PM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes	47 min
May 21, 12:12 AM CDT	Severe Thunderstorm Warning	OUN	Garvin, Murray	48 min
May 21, 12:13 AM CDT	Severe Thunderstorm Warning	OUN	Pontotoc, Seminole	47 min
May 21, 12:41 AM CDT	Severe Thunderstorm Warning	OUN	Garvin, McClain, Murray, Pontotoc	49 min
May 21, 12:49 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc	41 min
May 21, 1:10 AM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Seminole	50 min
May 21, 1:33 AM CDT	Special Weather Statement	OUN	Hughes	27 min
May 21, 1:41 AM CDT	Severe Thunderstorm Warning	OUN	Coal, Hughes, Pontotoc	49 min
May 21, 2:16 AM CDT	Special Weather Statement	OUN	Pottawatomie	29 min
May 21, 2:26 AM CDT	Special Weather Statement	OUN	Coal	34 min
May 21, 2:38 AM CDT	Special Weather Statement	OUN	Pottawatomie	37 min
May 21, 3:08 AM CDT	Special Weather Statement	OUN	Hughes	37 min
May 21, 3:12 AM CDT	Special Weather Statement	OUN	Seminole	33 min
May 21, 3:28 AM CDT	Special Weather Statement	OUN	McClain	32 min
May 21, 3:42 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	48 min
May 21, 3:56 AM CDT	Special Weather Statement	OUN	Hughes	34 min
May 21, 3:58 AM CDT	Special Weather Statement	OUN	Kiowa	32 min
May 21, 4:29 AM CDT	Special Weather Statement	OUN	Pottawatomie	31 min
May 21, 5:00 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche	45 min
May 21, 5:25 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	50 min
May 21, 6:00 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Grady, McClain	30 min
May 21, 6:29 AM CDT	Special Weather Statement	OUN	Cleveland	31 min
May 21, 7:14 AM CDT	Special Weather Statement	OUN	Tillman	46 min
May 21, 7:16 AM CDT	Special Weather Statement	OUN	Stephens	44 min
May 21, 7:39 AM CDT	Areal Flood Advisory	OUN	Coal, Garvin, Hughes, Johnston, Murray, Pontotoc and 1 more	3 hr
May 21, 7:56 AM CDT	Special Weather Statement	OUN	Cotton, Jefferson, Stephens, Tillman	49 min
May 21, 8:18 AM CDT	Special Weather Statement	OUN	McClain	27 min
May 21, 8:24 AM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma	36 min
May 21, 8:34 AM CDT	Special Weather Statement	OUN	Atoka	26 min
May 21, 8:40 AM CDT	Special Weather Statement	OUN	Carter, Murray	35 min
May 21, 8:56 AM CDT	Special Weather Statement	OUN	Cleveland	34 min
May 21, 8:58 AM CDT	Special Weather Statement	OUN	Greer, Harmon	47 min
May 21, 9:06 AM CDT	Areal Flood Advisory	OUN	Atoka, Coal	3 hr
May 21, 9:24 AM CDT	Special Weather Statement	OUN	Cleveland, McClain	36 min
May 21, 9:50 AM CDT	Special Weather Statement	OUN	Jackson	40 min
May 21, 9:54 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Harmon, Jackson, Kiowa, Washita	51 min
May 21, 10:17 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	43 min
May 21, 10:18 AM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Washita	42 min
May 21, 10:24 AM CDT	Special Weather Statement	OUN	Jackson, Tillman	51 min
May 21, 10:49 AM CDT	Special Weather Statement	OUN	Cleveland	26 min
May 21, 10:58 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Kiowa, Washita	47 min
May 21, 11:10 AM CDT	Special Weather Statement	OUN	Cotton, Jefferson	50 min
May 21, 11:28 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	62 min
May 21, 11:30 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady, Kingfisher	45 min
May 21, 11:53 AM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma	22 min
May 21, 11:59 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan, Oklahoma	46 min
May 21, 12:10 PM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	35 min
May 21, 12:15 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Jefferson, Murray, Stephens	45 min
May 21, 12:23 PM CDT	Special Weather Statement	OUN	Cleveland, McClain, Pottawatomie	52 min
May 21, 12:25 PM CDT	Special Weather Statement	OUN	Lincoln, Oklahoma	50 min
May 21, 12:45 PM CDT	Special Weather Statement	OUN	Lincoln, Payne	45 min
May 21, 12:49 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Johnston, Marshall, Murray, Pontotoc	56 min
May 21, 12:52 PM CDT	Special Weather Statement	OUN	Garvin, Hughes, Pottawatomie, Seminole	53 min
May 21, 12:53 PM CDT	Areal Flood Advisory	OUN	Carter, Johnston, Love, Marshall, Murray, Pontotoc	3 hr
May 21, 1:20 PM CDT	Special Weather Statement	OUN	Coal, Hughes	55 min
May 21, 1:27 PM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Coal, Hughes, Johnston, Marshall and 1 more	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013 Severe Thunderstorm Warnings in Texas, 2013 Every severe thunderstorm warning in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.