Severe Thunderstorm Warning 11, NWS Norman, OK

Issued

Mar 24, 2002, 8:04 PM CST (02:04 UTC)

Expired

Mar 24, 2002, 8:45 PM CST

In force

41 min

Issued by

NWS Norman, OK

Area

Counties, with a storm outline in the text

County Oklahoma County, OK

The Norman radar (KTLX), 29 km from the middle of the area, began a volume at 02:05 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.

000 
WUUS54 KOUN 250204
SVROKC
OKC109-250245-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
803 PM CST SUN MAR 24 2002

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKLAHOMA COUNTY IN CENTRAL OKLAHOMA

* UNTIL 845 PM CST

* AT 803 PM CST...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 11
  MILES SOUTH OF BETHANY...MOVING NORTHEAST AT 40 MPH.  OTHER 
  STRONG STORMS WERE SCATTERED ACROSS THE OKLAHOMA CITY METRO AREA.

* LOCATIONS IN THE WARNING INCLUDE ARCADIA...BETHANY...CHOCTAW...DEL
  CITY...EDMOND...HARRAH...JONES...LUTHER...MIDWEST CITY...NICHOLS
  HILLS...NICOMA PARK...OKLAHOMA CITY...SPENCER...THE VILLAGE...
  TINKER AIR FORCE BASE AND WARR ACRES

HAIL UP TO THE SIZE OF QUARTERS IS LIKELY WITH THIS SEVERE
THUNDERSTORM.

LAT...LON 3551 9767 3538 9767 3539 9715 3573 9715
          3568 9758

CMS

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 24, 2:55 PM CST, 5 hours 9 minutes earlier.

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
255 PM CST SUN MAR 24 2002

FIRST SURFACE BOUNDARY/DRY LINE HAS PRETTY MUCH STALLED AND EXTENDED
FROM THE EASTERN TEXAS PANHANDLE INTO SOUTHWEST OKLAHOMA...THEN UP
INTO NORTH CENTRAL OKLAHOMA. MAIN BAROCLINIC BOUNDARY CONTINUING TO
OOZE SOUTHWARD ACROSS NORTHWEST OKLAHOMA. MAIN FRONT IS EXPECTED TO
OVERTAKE THE FIRST ONE THIS EVENING. DEVELOPMENT OF LOW CLOUDS
BEHIND FRONT ARE ALSO EXPECTED TO MAKE A RUN SOUTHWARD ALSO AS COLD
AIR ADVECTION INCREASES.

PROBABILITIES OF PRECIPITATION APPEAR LOWER THAN PREVIOUSLY THOUGHT.
MOST OF MARGINAL MOISTURE VALUES CREEPING EASTWARD WITH VEERING LOW
LEVEL FLOW. ALTHOUGH POPS WILL NOT BE ZERO TONIGHT THROUGH MONDAY
ACROSS OUR FORECAST AREA...WE BELIEVE THAT MOST AMOUNTS WILL BE VERY
LIGHT. HOWEVER...WILL LEAVE THUNDER MENTIONED IN CENTRAL AND EASTERN
ZONES AS LAPSE RATES ARE VERY HIGH AND APPROACHING MID LEVEL SPEED
MAX THIS EVENING COULD GET SOME ELEVATED ACTIVITY GOING. SNOW
WORDING WILL BE RETAINED ACROSS THE NORTH...ALTHOUGH FORECAST
SOUNDINGS INDICATE THAT POTENTIAL FOR SNOW WILL BE AFTER MIDNIGHT
AND AMOUNTS VERY LIGHT. WILL KEEP CHANCES OF RAIN IN FORECAST FOR
MONDAY...ALTHOUGH MAIN PRECIPITATION TYPE WILL PROBABLY BE
DRIZZLE/FOG...EXCEPT FOR FLURRIES ACROSS NORTHERN OKLAHOMA. MOST IF
NOT ALL OF LIFT WILL BE GONE MONDAY NIGHT. WARMING TREND WILL
COMMENCE ON TUESDAY THROUGH END OF WEEK.

FOR THE EXTENDED PERIODS...LARGE DISCREPANCIES EXIST BETWEEN THE
MEDIUM RANGE MODEL SUITES. MRF IS SHOWING BETTER RUN-TO-RUN
TRENDS...AND STILL INDICATES THE DEVELOPMENT/PROGRESSION OF FIRST
SIGNIFICANT CUT-OFF OF THE YOUNG SPRING SEASON. WILL MODIFY GOING
FORECAST TO DELAY ONSET OF POPS UNTIL FRIDAY NIGHT. IF MRF COMES
CLOSE TO VERIFYING...NEXT WEEKEND WILL BE RELATIVELY MILD AND WET
ACROSS THE FORECAST AREA. WILL NOT GO OVERBOARD AND JUST MENTION
CHANCE POPS THROUGH SUNDAY NIGHT. DEPENDING ON HOW MODELS HANDLE
POTENTIAL CUT-OFF...RAIN SCENARIO COULD BE PUSHED BACK EVEN FURTHER
IN LATER FORECASTS.

FCSTID = 11

PRELIMINARY CCF NUMBERS...
OKC   38  41  29  52 /  40  40  10   0
HBR   36  41  29  53 /  30  30   0   0
SPS   41  48  31  54 /  30  30   0   0
GAG   28  36  22  52 /  40  40  10   0
PNC   35  39  26  50 /  40  40  20   0
DUA   45  49  32  51 /  40  30  20   0

.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.