Severe Thunderstorm Warning 367, NWS Norman, OK

Issued

Aug 13, 2002, 12:15 AM CDT (05:15 UTC)

Expired

Aug 13, 2002, 1:00 AM CDT

In force

45 min

Issued by

NWS Norman, OK

Area

Counties, with a storm outline in the text

Counties Garfield County, OK, Grant County, OK, Kay County, OK

The Vance AFB radar (KVNX), 43 km from the middle of the area, began a volume at 05:17 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.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

296 
WUUS54 KOUN 130515
SVROKC
OKC047-053-071-130600-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1214 AM CDT TUE AUG 13 2002

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GARFIELD COUNTY IN NORTHERN OKLAHOMA
  GRANT COUNTY IN NORTHERN OKLAHOMA
  KAY COUNTY IN NORTHERN OKLAHOMA

* UNTIL 100 AM CDT

* AT 1214 AM CDT...DOPPLER RADAR DETECTED A LINE OF SEVERE           
  THUNDERSTORMS FROM 6 MILES NORTHWEST OF BRAMAN TO ENID...MOVING    
  EAST AT 20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BLACKWELL...BRAMAN...
  BRECKENRIDGE...COVINGTON...DEER CREEK...DOUGLAS...ENID...
  FAIRMONT...GARBER...HILLSDALE...HUNTER...JEFFERSON...KREMLIN...
  LAMONT...MEDFORD...NARDIN...POND CREEK...RENFROW...VANCE AIR FORCE
  BASE AND WAUKOMIS

HAIL UP TO THE SIZE OF DIMES AND WIND GUSTS TO 65 MPH ARE LIKELY 
WITH THIS LINE OF SEVERE THUNDERSTORMS.

SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH NO ADVANCE WARNING.
MOVE IMMEDIATELY TO A STORM SHELTER... BASEMENT OR STURDY BUILDING IF
A TORNADO IS SIGHTED.

LAT...LON 3699 9777 3680 9792 3658 9801 3627 9803
          3620 9750 3660 9745 3679 9730 3699 9712

30

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 12, 9:45 PM CDT, 2 hours 30 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
945 PM CDT MON AUG 12 2002

UPDATE FOR MEDIA... SPC PLANS TO ISSUE A NEW SEVERE THUNDERSTORM
WATCH TO REPLACE EXIPIRING TORNADO WATCH IN NORTHWEST OKLAHOMA. AREA
COVERED WILL BE SIMILAR EXCEPT THAT IT WILL EXTEND A LITTLE FARTHER
EAST ACROSS NORTHERN OKLAHOMA. OKCSLSOK WILL BE ISSUED SHORTLY.

32

--------------------------------------
800 PM CDT MON AUG 12 2002

LOOKS LIKE IT WILL BE AFTER MIDNIGHT BEFORE TSTMS SPREAD INTO
CENTRAL OKLAHOMA. NORTHWEST ZONES LIKELY TO SEE STORMS THIS EVENING
AS SOME OF THE CONVECTION IN SOUTHWEST KANSAS IS BEGINNING TO
DEVELOP A MORE SOUTHWARD COMPONENT OF MOTION. UPDATED FORECASTS TO
REFLECT TIMING OF TSTMS OVERNIGHT. ALSO BUMPED WINDS UP OVER THE
CENTRAL AND WEST.

32
--------------------------------------
323 PM CDT MON AUG 12 2002

FNTL BNDRY REMAINS JUST TO THE NW OF THE FA THIS AFTN. STG SLY LO
LVL FLO IS RETURNING HIGH DEWPOINT AIR NWD INTO WRN OK AS AMS
RECOVERS FROM OVERNIGHT TSTM COMPLEX. LOOKS LIKE BEST AREA FOR
INITIATION LATE THIS AFTN WILL BE JUST TO THE NORTHWEST OF THE FA
WHERE CDFNT AND WHATS LEFT OF OUTFLOW BNDRY INTERSECT. AS PER SPC
THREAT FOR SUPERCELLS IS GOOD IN THE NW CORNER OF THE FA THROUGH
EARLY EVENING WITH MORE OF A WIND/HAIL THREAT EXPECTED LATER. EXPECT
FNT TO SAG SWD OVERNIGHT WITH TSTM DVLPMENT AIDED BY S/W MOVING OUT
OF THE ROCKIES AND DECENT LLJ. FNTL BNDRY WILL CONTINUE SWD INTO THE
FA ON TUESDAY WITH CONTINUED THREAT OF SHWRS/TSTMS. DIFFICULT TO
PINPOINT WHERE FNT WILL BE BY TUESDAY AS OUTFLOW FROM STORMS MAY
PUSH THE EFFECTIVE BNDRY FRTHR S THAN MODEL SOLUTIONS SUGGEST.
PRECIP THREAT WILL CONTINUE BEHIND THE FRONT UNTIL UPR TROF FINALLY
SWINGS E OF THE AREA TUESDAY NIGHT INTO WED MORNING. WITH EXTENSIVE
CLOUD COVER AND AT LEAST SOME PRECIP AROUND...TMPS TUESDAY SHUD BE
SIG COOLER IN ALL BUT THE SE WHERE LATER FNTL PASSAGE WILL ALLOW FOR
SOME WARMUP. WILL LEAVE FCST DRY AFTER WEDNESDAY MORNING AS UPR TROF
MOVES EAST OF THE AREA. LTL CHANGE TO EXTENDED
FCST.

FCSTID =2
OKC   68  81  61  86 /  40  50  20  10
HBR   68  84  60  88 /  40  50  20  10
SPS   72  88  64  89 /  20  40  40  10
GAG   62  74  53  87 /  60  60   0  10
PNC   67  77  59  86 /  60  60  10  10
DUA   73  87  65  88 /  20  40  60  20

.OUN...
OK...NONE.
TX...NONE.

Severe Thunderstorm Warnings in Oklahoma, 2002Every severe thunderstorm warning in 2002

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