Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 307, NWS Norman, OK

June 15, 2002Beckham County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 15, 2002, 8:28 PM CDT for Beckham County, Oklahoma. It was in force for 32 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: Jun 15, 2002, 8:28 PM CDT (01:28 UTC)
Expired: Jun 15, 2002, 9:00 PM CDT
In force: 32 min
Issued by: NWS Norman, OK
Area: Counties, with a storm outline in the text

County Beckham County, OK

The radar

The Altus AFB radar (KFDR), 121 km from the middle of the area, began a volume at 01:28 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
Jun 15, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 1.5 hours before the alert went out and 193 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: 1767 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 2186 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 147 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 15.2

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KOUN 160128
SVROKC
OKC009-160200-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
828 PM CDT SAT JUN 15 2002

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BECKHAM COUNTY IN WESTERN OKLAHOMA

* UNTIL 900 PM CDT

* AT 828 PM CDT...DOPPLER RADAR DETECTED A SEVERE THUNDERSTORM FROM
  ELK CITY TO 5 MILES WEST OF ERICK...MOVING SOUTHEAST AT 40 MPH.

* LOCATIONS IN THE WARNING INCLUDE CARTER...ELK CITY...ERICK AND
  RETROP

THESE THUNDERSTORMS HAVE A HISTORY OF PRODUCING 70 MPH WINDS. MOBILE 
HOMES AND HIGH PROFILE VEHICLES ARE ESPECIALLY SUSCEPTIBLE TO HIGH 
WINDS AND MAY BE OVERTURNED. MOVE TO A STURDY BUILDING AND STAY AWAY 
FROM WINDOWS.

LAT...LON 3552 9941 3525 9952 3526 10000 3512 9992
          3513 9938 3552 9937
JAMES

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 Jun 15, 3:46 PM CDT, 4 hours 42 minutes earlier.

Area forecast discussion, Jun 15, 3:46 PM CDT, 4 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
346 PM CDT SAT JUN 15 2002

SHOULD BE AN INTERESTING EVENING. QUESTION IS WHERE THE MAIN SHOW
WILL BE...AS ALL MODELS BOLDLY ADVERTIZE MCS DEVELOPING SOMEWHERE
OVER CENTRAL OR S HIGH PLAINS AND ROLLING SE. LEANING MORE TOWARD
THE MORE S AND W TRACK OF THE ETA/NGM...WITH QPF MAX ACROSS SW PARTS
OF THE CWA. NOSE OF UPPER JET MAX...WITH 80-KT SPEED MAX NOW
VICINITY S UT...WILL DIVE SE INTO WC/CENTRAL TX BY LATE TONIGHT.
THIS PLACES SW CWA IN FAVORABLE LEFT EXIT REGION AND STRONG
DIVERGENCE ALOFT. POPS UPPED TO 80PCT OR GREATER AREAWIDE TONIGHT
BASED ON CURRENT RADAR TRENDS OVER KS. S.

MAIN CONCERN TONIGHT IS SEVERE POTENTIAL. SURFACE DEWPOINTS ONLY
EXPECTED TO BE IN LOW 60S...VS L-M 70S EARLIER IN WEEK. THIS STILL
YIELDS CAPES OF 2-3000 J/KG ALONG INSTABILITY AXIS EXPECTED TO LIE
ACROSS PANHANDLES BY LATE AFTERNOON. LL MOISTURE WILL CONTINUE TO
INCREASE INTO THIS EVENING AS SLUG OF GOOD 850 MOISTURE IS PULLED N
INTO AREA. WINDOW OF OPPORTUNITY FOR TORNADIC SUPERCELLS INVOF
SURFACE LOW/TRIPLE POINT THIS EVENING...MAINLY OVER E PANHANDLES BUT
POSSIBLY INCLUDING FAR W CWA. VERY FAVORABLE SHEAR WHERE INCREASING
NW FLOW ALOFT COMES ATOP STRENGTHENING SE LL FLOW AHEAD OF SURFACE
LOW. PROGGED 0-6KM SHEAR OVER 50KT SUGGESTS POSSIBLITY OF A FEW
STRONG/VIOLENT TORNADOES. RISK SHIFTS TO POTENTIAL WIDESPREAD
DAMAGING WINDS LATER THIS EVENING AS MCS DRIVES SE-WARD. LOCALLY
EXCESSIVE RAIN ALSO LIKELY PER HPC GUIDANCE AND AGRESSIVE MODEL
QPFS...BUT WITH DEWPOINTS DOWN FROM EARLIER IN WEEK AND MCS EXPECTED
TO ROLL SE FAIRLY QUICKLY...WILL HOLD OFF ON FF WATCH AT THIS TIME.
NW FLOW PATTERNS TYPICALLY ARE NOT CONDUCIVE TO WIDESPREAD EXCESSIVE
RAINFALL HERE. BUT WE WILL CARRY SEVERE AND HEAVY-RAIN WORDING.

WITH MOST OF OUR ATTENTION FOCUSED ON THE SHOW TONIGHT...WILL NOT
MAKE TOO MANY CHANGES TO LATTER PERIODS OF FORECAST. LOW POPS
CONTINUED SUN NIGHT INTO MON NIGHT UNDER CONTINUING NW FLOW ALOFT.
TUE-SAT DRY WITH TEMPS MODELLED CLOSELY TO MEX/HPC NUMBERS.

FCSTID = 24
OKC   62  81  62  83 /  90  20  20  30
HBR   61  86  61  84 /  90  10  30  30
SPS   63  81  62  83 /  90  40  20  30
GAG   59  85  60  85 /  90  10  30  30
PNC   61  83  61  85 /  90  10  20  30
DUA   61  78  62  81 /  80  70  20  30

.OUN...
OK...SEVERE THUNDERSTORM WATCH FROM 400 PM CDT SATURDAY UNTIL 1000
PM CDT SATURDAY FOR ZONES
OKZ006...OKZ021...OKZ017...OKZ023>024...OKZ029...OKZ016...OKZ015...OK
Z009...OKZ012...OKZ027...OKZ007...OKZ004...OKZ008...OKZ018...OKZ026..
.OKZ019...OKZ028...OKZ011...OKZ013...OKZ025...OKZ020...OKZ030...OKZ01
4...OKZ031...OKZ022...OKZ005...OKZ010.

TX...NONE.

In the hours before

Local storm report, Jun 15, 7:25 PM CDT, 1 hour 3 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
725 PM CDT SAT JUN 15 2002

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

0717 PM    1 S BISON                 OK   60 MPH WIND GUST
06/15/02   GARFIELD                       ESTIMATED BY AMATEUR
                                          RADIO OPERATOR.

0717 PM    3 N HENNESSEY             OK   60 MPH WIND GUST
06/15/02   KINGFISHER                     ESTIMATED BY AMATEUR
                                          RADIO OPERATOR.

KT

Local storm report, Jun 15, 7:34 PM CDT, 54 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
734 PM CDT SAT JUN 15 2002

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

0733 PM    MARSHALL                  OK   60 MPH WIND GUST
06/15/02   LOGAN                          ESTIMATED BY NWS COOP
                                          OBSERVER.

KT

Local storm report, Jun 15, 7:57 PM CDT, 31 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
757 PM CDT SAT JUN 15 2002

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

0730 PM    TALOGA                    OK   WIND DAMAGE
06/15/02   DEWEY                          2 INCH DIAMETER TREE
                                          LIMBS DOWNED. REPORTED
                                          BY COUNTY SHERIFFS OFFICE.

KT

Local storm report, Jun 15, 8:02 PM CDT, 26 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
802 PM CDT SAT JUN 15 2002

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

0758 PM    WEATHERFORD               OK   65 MPH WIND GUST
06/15/02   CUSTER                         ESTIMATED BY PUBLIC.

0801 PM    WEATHERFORD               OK   80 MPH WIND GUST
06/15/02   CUSTER                         ESTIMATED BY PUBLIC.
                                          ALSO POWER FLUCTUATIONS.

KT

Local storm report, Jun 15, 8:12 PM CDT, 16 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
812 PM CDT SAT JUN 15 2002

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

0745 PM    5 NW SWEETWATER           OK   80 MPH WIND GUST
06/15/02   ROGER MILLS                    ESTIMATED BY PUBLIC.
                                          ALSO 6 INCH DIAMETER
                                          TREE LIMBS DOWNED AND
                                          WITHOUT ELECTRICITY.

KT

Local storm report, Jun 15, 8:16 PM CDT, 12 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
816 PM CDT SAT JUN 15 2002

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

0755 PM    SWEETWATER                OK   60 MPH WIND GUST
06/15/02   BECKHAM                        ESTIMATED BY NWS COOP
                                          OBSERVER.

0800 PM    6 SW CHEYENNE             OK   62 MPH WIND GUST
06/15/02   ROGER MILLS                    MEASURED BY MESONET.

0810 PM    SAYRE                     OK   70 MPH WIND GUST
06/15/02   BECKHAM                        ESTIMATED BY SPOTTER.

KT

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 7:07 PM CDT	Severe Thunderstorm Warning	OUN	Dewey	38 min
Jun 15, 7:15 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher, Logan, Noble	45 min
Jun 15, 7:26 PM CDT	Severe Thunderstorm Warning	OUN	Custer	64 min
Jun 15, 7:32 PM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	58 min
Jun 15, 7:51 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	39 min
Jun 15, 8:03 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	57 min
Jun 15, 8:15 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	30 min
Jun 15, 8:19 PM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Kiowa	56 min
Jun 15, 8:56 PM CDT	Severe Thunderstorm Warning	OUN	Jackson	64 min
Jun 15, 9:01 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Comanche, Grady	59 min
Jun 15, 9:11 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	64 min
Jun 15, 9:14 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa	31 min
Jun 15, 9:38 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Stephens	52 min
Jun 15, 10:04 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	56 min

Nearby

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

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.