Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 39, NWS Norman, OK

March 17, 2003Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Mar 17, 2003, 6:59 PM CST for Oklahoma County, Oklahoma. It was in force for 46 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: Mar 17, 2003, 6:59 PM CST (00:59 UTC)
Expired: Mar 17, 2003, 7:45 PM CST
In force: 46 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Oklahoma County, OK

The radar

The Norman radar (KTLX), 17 km from the middle of the area, began a volume at 00:58 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.

Did it verify

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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 17, 6:50 PM CST	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.0 hours before the alert went out and 32 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 67 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1330 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 234 m²/s²
0-3 km storm-relative helicity: 486 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOUN 180059
SVROKC
OKC109-180145-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
659 PM CST MON MAR 17 2003

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

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

* UNTIL 745 PM CST

* AT 659 PM CST...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM 
OVER   SOUTHEAST OKLAHOMA CITY...MOVING NORTH AT 25 MPH.

* LOCATIONS IN THE WARNING INCLUDE CHOCTAW...HARRAH...JONES...  
LUTHER...MIDWEST CITY...NEWALLA AND EASTERN OKLAHOMA CITY

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

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 3537 9739 3536 9717 3567 9714 3568 9731

$$

CJS

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 Mar 17, 3:43 PM CST, 3 hours 16 minutes earlier.

Area forecast discussion, Mar 17, 3:43 PM CST, 3 hours 16 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
343 PM CST MON MAR 17 2003

WIDESPREAD THUNDERSTORMS... MANY OF WHICH ARE SEVERE... HAVE ALREADY
DEVELOPED ACROSS MUCH OF CENTRAL AND WESTERN OKLAHOMA.  MUCH LESS
COVERAGE IS ACROSS EXTREME SOUTHWEST OKLAHOMA AND WESTERN NORTH
TEXAS.  THE STORMS ARE ASSOCIATED WITH A VERY STRONG LOW PRESSURE
SYSTEM CENTERED OVER SOUTHEAST COLORADO.  THIS LOW IS EXPECTED TO
MOVE RATHER LITTLE OVER THE NEXT COUPLE OF DAYS... DUE TO THE NEARLY
STACKED NATURE OF THE SYSTEM... AND THE SLOWNESS OF THE PROJECTED
MOVEMENT OF THE UPPER SYSTEM.

DRY AIR WILL WRAP AROUND THE SOUTHERN AND SOUTHEASTERN SECTIONS OF
THE LOWS CIRCULATION THIS EVENING.  THIS SHOULD BRING A TEMPORARY
END TO STORMS IN OUR FORECAST AREA... IN A SOUTHWEST-TO-NORTHEAST
PATTERN.  MODELS SUGGEST THAT SHOWERS AND STORMS WILL REDEVELOP
EARLY TOMORROW AFTERNOON AS A STRONG IMPULSE ROTATES AROUND THE
UPPER LOW.  THERE IS A POSSIBILITY THAT THOSE STORMS MAY BE SEVERE
TOO... IN OUR SOUTHEASTERN COUNTIES.

THE SLUGGISH STORM SYSTEM WILL CONTINUE TO WOBBLE SLOWLY AND
AIMLESSLY AROUND NORTHERN OKLAHOMA AND SOUTHERN KANSAS UNTIL FINALLY
MOVING OFF TO THE NORTHEAST LATE IN THE WEEK.  RAIN CHANCES
WEDNESDAY THROUGH THURSDAY WILL BE IN THE CHANCE/SLIGHT CHANCE
CATEGORIES... AND WILL BE MAINLY SHOWERS AS LOW LEVELS WILL BE
RELATIVELY DRY... AND INSTABILITY WILL BE LESS.

RAIN CHANCES INCREASE AGAIN ON SATURDAY AS A WEAKER SYSTEM ARRIVES
IN THE AREA.  THIS SYSTEM WILL PROBABLY NOT HAVE MUCH MOISTURE TO
WORK WITH... DUE TO UNFAVORABLE LOW-LEVEL FLOW.  AT THIS TIME... IT
LOOKS LIKE RAIN OR SHOWERS WILL BE THE MAIN PRECIPITATION TYPE...
WITH THUNDERSTORMS RESTRICTED TO THE RED RIVER VALLEY.

THE GFS SUGGESTS ANOTHER MAJOR STORM ABOUT THE MIDDLE OF NEXT
WEEK... BUT THAT IS BEYOND THE RANGE OF THIS FORECAST.

TEMPERATURES WILL DROP OFF ABOUT 10 TO 20 DEGREES FROM TODAYS
LEVELS FOR THE REST OF THE WEEK.  A QUICK WARMUP IS POSSIBLE ON DAY
7... OR MORE LIKELY ON DAY 8... AS THE MID-NEXT-WEEK STORM
APPROACHES.  WINDY CONDITIONS WILL GENERALLY RESULT IN SLIGHTLY
WARMER OVERNIGHT LOWS... COMPARED TO GUIDANCE... FOR THE NEXT
SEVERAL DAYS.  THE LOW WILL MOVE ACROSS NORTHERN OKLAHOMA ON
WEDNESDAY... AND WIND DIRECTION FORECASTS IN THAT PART OF OUR
FORECAST AREA WILL DEPEND HEAVILY ON THE EXACT POSITION OF THE LOW.

FCSTID = 23 = CMS

OKC   52  65  46  66 /  70  60  40  20
HBR   47  66  42  64 /  30  30  20  20
SPS   51  70  46  67 /  20  40  10  20
GAG   43  59  38  53 /  40  30  30  40
PNC   54  63  45  62 /  90  70  70  50
DUA   56  69  50  69 /  70  70  40  20

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

Hazardous weather outlook, Mar 17, 12:00 PM CST, 6 hours 59 minutes before

OKZ004>048-050>052-TXZ083>090-172200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1200 PM CST MON MAR 17 2003

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND
TONIGHT ACROSS OKLAHOMA AND WESTERN NORTH TEXAS. THE PRIMARY SEVERE
WEATHER RISK WILL BE LARGE HAIL AND STRONG WINDS.

LOCATION...
THE SLIGHT RISK AREA COVERS ALL OF NORTHERN...WESTERN...CENTRAL...
AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS. THE MOST ORGANIZED
ACTIVITY WILL PRIMARILY AFFECT AREAS EAST OF A LINE EXTENDING FROM
CHEYENNE...TO VERNON AND ARCHER CITY TEXAS.

TIMING...
THE MOST LIKELY TIME FOR SEVERE THUNDERSTORMS WILL BE FROM MID
AFTERNOON THROUGH EARLY TUESDAY MORNING.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS THE
AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON THROUGH
EARLY TUESDAY MORNING.

DISCUSSION...
SCATTERED HIGH BASED SHOWERS AND ISOLATED SMALL THUNDERSTORMS WILL
CONTINUE TO MOVE ACROSS PORTIONS OF WESTERN AND CENTRAL OKLAHOMA
DURING THE AFTERNOON. MEANWHILE... THUNDERSTORMS WILL BE INCREASING
IN STRENGTH THIS AFTERNOON ACROSS OKLAHOMA AND WESTERN NORTH TEXAS
AS AN UPPER LEVEL STORM MOVES INTO WEST TEXAS. THE STRONGEST STORMS
ARE EXPECTED TO INITIALLY BE IN SOUTHWEST AND SOUTH CENTRAL OKLAHOMA
AND PORTIONS OF WESTERN NORTH TEXAS... IN THE VICINITY OF A
DEVELOPING DRYLINE. THIS WILL ALSO BE AN AREA WITH HIGHER
INSTABILITIES. THE DRYLINE IS EXPECTED TO SURGE INTO SOUTHWEST
OKLAHOMA AND WESTERN NORTH TEXAS BY LATE AFTERNOON. ELSEWHERE...
EXTENSIVE CLOUD COVER HAS RESULTED A SOMEWHAT MORE STABLE AIRMASS AT
LOW LEVELS OVER OVER CENTRAL AND NORTHERN OKLAHOMA. HOWEVER... SOUTH
WINDS WILL BEGIN TO PULL MORE UNSTABLE AIR NORTH INTO THIS AREA
DURING THE AFTERNOON. THE GREATEST THREAT OF STRONG STORMS IS
EXPECTED TO SHIFT INTO CENTRAL AND SOUTHEAST OKLAHOMA DURING THE
OVERNIGHT HOURS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CST TUESDAY MAR 18.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...50 PERCENT.

OTHER HAZARDOUS WEATHER...
STRONG WINDS...LOW HUMIDITIES...AND WARM TEMPERATURES WILL LEAD TO A
HIGH TO EXTREME FIRE DANGER FOR PORTIONS OF EXTREME SOUTHWEST
OKLAHOMA AND WESTERN NORTH TEXAS THIS AFTERNOON. AS A DRYLINE MOVES
EAST OUT OF THE AREA...HIGH TO EXTREME FIRE DANGER CONDITIONS ARE
LIKELY. PLEASE REFER TO THE LATEST VERSION OF OUR FIRE WEATHER
PRODUCTS FOR MORE INFORMATION.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...
THUNDERSTORM OUTLOOK...
STRONG TO SEVERE THUNDERSTORMS WILL ONCE AGAIN BE POSSIBLE ON
TUESDAY...MAINLY OVER EASTERN SECTIONS OF OKLAHOMA. BEYOND
TUESDAY...ISOLATED TO SCATTERED THUNDERSTORMS WILL BE POSSIBLE AS A
LARGE...SLOW MOVING STORM SYSTEM CONTINUES TO AFFECT THE SOUTHERN
PLAINS.

OTHER HAZARDOUS WEATHER...
AN EXTREME FIRE DANGER IS EXPECTED ON TUESDAY ACROSS WESTERN AND
CENTRAL OKLAHOMA...AND WESTERN NORTH TEXAS AS THE MENTIONED DRYLINE
SURGES FURTHER EAST.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AT 7 AM
TUESDAY MORNING.

CJS

In the hours before

Local storm report, Mar 17, 5:45 PM CST, 1 hour 14 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
545 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0540 PM    DUNCAN                    OK   2.25 INCH HAIL
03/17/03   STEPHENS                       REPORTED BY SPOTTER

MB

Local storm report, Mar 17, 5:53 PM CST, 1 hour 6 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
553 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0550 PM    1.5 N GEARY               OK   .75 INCH HAIL
03/17/03   BLAINE                         REPORTED BY HAM SPOTTER

0550 PM    7 E LAWTON                OK   1.25 INCH HAIL
03/17/03   COMANCHE                       REPORTED BY HAM SPOTTER

MB

Local storm report, Mar 17, 6:05 PM CST, 54 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
605 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0603 PM    PUMPKIN CENTER            OK   TORNADO
03/17/03   COMANCHE                       TORNADO REPORTED BY SPOTTER

MB

Local storm report, Mar 17, 6:23 PM CST, 36 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
623 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0612 PM    2 E PUMPKIN CENTER         OK   2.00 INCH HAIL
03/17/03   COMANCHE                       REPORTED BY HAM RADIO
                                          SPOTTER.

0620 PM    9 SW KINGFISHER           OK   .75 INCH HAIL
03/17/03   KINGFISHER                     REPORTED BY KINGFISHER
                                          COUNTY EM

0613 PM    8 W KINFISHER              OK   .75 INCH HAIL
03/17/03   KINGFISHER                     REPORTED BY KINFISHER
                                          COUNTY EM

0629 PM    FORT SUPPLY               OK   .75 INCH HAIL
03/17/03   WOODWARD                       REPORTED BY HAM RADIO
                                          SPOTTER.

TY/JLP

Local storm report, Mar 17, 6:35 PM CST, 24 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
635 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0628 PM    4 NE PUMPKIN CENTER       OK   1.75 INCH HAIL
03/17/03   STEPHENS                       GOLFBALL SIZE HAIL REPORTED
                                          ON STEPHENS/COMANCHE CO.
                                          LINE BY PUBLIC

0633 PM    4 W MARLOW                OK   1.25 INCH HAIL
03/17/03   STEPHENS                       REPORTED BY HAM SPOTTER

JLP/TJ

Local storm report, Mar 17, 6:46 PM CST, 13 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
646 PM CST MON MAR 17 2003

TIME (CST) .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0646 PM    KINGFISHER                OK   1.00 INCH HAIL
03/17/03   KINGFISHER                     REPORTED BY EMERGENCY
                                          MANAGER.
JLP

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 6:01 PM CST	Tornado Warning	OUN	Comanche, Stephens	29 min
Mar 17, 6:21 PM CST	Severe Thunderstorm Warning	OUN	Woodward	54 min
Mar 17, 6:31 PM CST	Severe Thunderstorm Warning	OUN	Grady, Stephens	44 min
Mar 17, 6:31 PM CST	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	59 min
Mar 17, 6:43 PM CST	Severe Thunderstorm Warning	OUN	Cleveland	47 min
Mar 17, 7:14 PM CST	Severe Thunderstorm Warning	OUN	Grady	61 min
Mar 17, 7:27 PM CST	Severe Thunderstorm Warning	OUN	Garvin, McClain	48 min
Mar 17, 7:31 PM CST	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	59 min
Mar 17, 7:42 PM CST	Severe Thunderstorm Warning	OUN	Lincoln	63 min
Mar 17, 8:13 PM CST	Severe Thunderstorm Warning	OUN	Cleveland, McClain	47 min
Mar 17, 8:15 PM CST	Severe Thunderstorm Warning	OUN	Garfield, Noble	45 min
Mar 17, 8:59 PM CST	Severe Thunderstorm Warning	OUN	Cleveland	16 min
Mar 17, 9:14 PM CST	Severe Thunderstorm Warning	OUN	Noble	61 min
Mar 17, 9:21 PM CST	Severe Thunderstorm Warning	OUN	Pottawatomie	54 min
Mar 18, 3:22 AM CST	Severe Thunderstorm Warning	OUN	Carter, Love	38 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2003 Every severe thunderstorm warning in 2003

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.