Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 359, NWS Norman, OK

July 15, 1997McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 15, 1997, 2:44 PM CDT for McClain County, Oklahoma. It was in force for 46 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 15, 1997, 2:44 PM CDT (19:44 UTC)
Expired: Jul 15, 1997, 3:30 PM CDT
In force: 46 min
Issued by: NWS Norman, OK
Area: Whole counties

County McClain County, OK

What was reported inside it

Time	Report	Where	Remark
Jul 15, 2:48 PM CDT	Hail 1	Wayne, OK
Jul 15, 2:48 PM CDT	Thunderstorm Wind 61	Wayne, OK	A roof was blown off a wellhouse, several trees were blown over, and several awnings were blown off buildings by winds estimated at 70 mph.

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.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.7 hours before the alert went out and 24 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: 1353 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1708 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 30 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jul 15, 2:45 AM CDT, 11 hours 59 minutes earlier.

Area forecast discussion, Jul 15, 2:45 AM CDT, 11 hours 59 minutes before

FPUS3 KOKC 150745
AFDOKC

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
245 AM CDT TUE JUL 15 1997

MAIN QUESTION THIS MORNING IS PRECIP CHANCES.  FORECAST SOUNDINGS FOR
00Z MODIFIED WITH EXPECTED SFC CONDITIONS SHOW CAP TEETERING ON THE EDGE
OF BEING BROKEN WITH THE ETA OR PRETTY SOLID BREAKAGE WITH THE NGM.
TSTMS HAVE BEEN MORE ON THE ISOLATED SCALE THE LAST COUPLE OF DAYS
THOUGH. AM INCLINED TO HAVE POPS AOB 20 PCT BUT WL DECIDE LATER ON 20S
OR ISOLATED (BLO 20) POPS IN THE ZONES.  CURRENT PRECIP WILL ALSO HELP
DECISION AT ZONE TIME.  WE HAVE MORE MID/HIGH CLOUDS THAN YDAY MORNING
SO WITHOUT SIG CHG IN AMS WL KEEP TEMPS A DEGREE OR TWO BLO YDAYS MAXS.
EXCEPTION WILL BE IN NORTH WHERE BDRY WASHING OUT WILL ALLOW TEMPS NR OR
SLGTLY ABV YDAY.  TEMPS IN FAVORED AREA OF SW AND ISOLATED LOCATION IN
HEAT BOX CORRIDOR OF NC OKLA WILL AGAIN REACH TRIPLE DIGITS.

LATER... S/W PROGGED TO DRIFT SWD THRU CNTRL PLAINS AND INTO NRN OKLA
TMW ON EAST SIDE OF UPR RIDGE.  PRECIP CHCS WL BE DETERMINED BY
EVOLUTION OF THERMODYNAMIC PROFILE AND POTENTIAL CAP DEVELOPMENT.
UNSURE ENOUGH ON THIS PARAMETER ATTM TO INTRODUCE POPS AND WL DEFER
DECISION TO DAY SHIFT.

FCSTID = 26
FIRST LOOK...
OKC   96  72  96  73 /  20   0  10  10
HBR   98  71  98  72 /  20  10  10  10
SPS  100  72 101  73 /  20   0  10   0
GAG   99  70  99  71 /  20  10  10  10
PNC   97  74  99  76 /  20  10  10  10
DUA   96  73  97  73 /  20   0  10   0

.OKC...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Jul 15, 8:58 AM CDT, 5 hours 46 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
900 AM CDT TUE JUL 15 1997

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

0855 AM    2 E SOUTHARD              OK   1.25 INCH HAIL.
07/15/97   BLAINE

0855 AM    2 E SOUTHARD              OK   WIND DAMAGE
07/15/97   BLAINE                         4 INCH TREE LIMB BLOWN DOWN.
                                               
MCCAMMON

Local storm report, Jul 15, 9:00 AM CDT, 5 hours 44 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
900 AM CDT TUE JUL 15 1997

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

0855 AM    2 E SOUTHARD              OK   1.25 INCH HAIL.
07/15/97   BLAINE

0855 AM    2 E SOUTHARD              OK   WIND DAMAGE
07/15/97   BLAINE                         4 INCH TREE LIMB BLOWN DOWN.

MCCAMMON

Local storm report, Jul 15, 10:03 AM CDT, 4 hours 41 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
1005 AM CDT TUE JUL 15 1997

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

1000 AM    7 N WATONGA               OK   0.88 INCH HAIL.
07/15/97   BLAINE

MCCAMMON

Local storm report, Jul 15, 10:05 AM CDT, 4 hours 39 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
1005 AM CDT TUE JUL 15 1997

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

1000 AM    7 N WATONGA               OK   0.88 INCH HAIL.
07/15/97   BLAINE

MCCAMMON

Local storm report, Jul 15, 2:24 PM CDT, 20 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
225 PM CDT TUE JUL 15 1997

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

0215 PM    LAKE LAWTONKA             OK   0.88 INCH HAIL.
07/15/97   COMANCHE

MCCAMMON

Local storm report, Jul 15, 2:25 PM CDT, 19 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OKLAHOMA
225 PM CDT TUE JUL 15 1997

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

0215 PM    LAKE LAWTONKA             OK   0.88 INCH HAIL.
07/15/97   COMANCHE

MCCAMMON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 5:20 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	40 min
Jul 15, 8:30 AM CDT	Severe Thunderstorm Warning	OUN	Blaine	45 min
Jul 15, 9:52 AM CDT	Severe Thunderstorm Warning	OUN	Blaine	53 min
Jul 15, 10:00 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	45 min
Jul 15, 11:05 AM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey	40 min
Jul 15, 1:51 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	39 min
Jul 15, 2:32 PM CDT	Severe Thunderstorm Warning	OUN	Garvin	43 min
Jul 15, 2:39 PM CDT	Severe Thunderstorm Warning	OUN	Johnston	51 min
Jul 15, 3:01 PM CDT	Severe Thunderstorm Warning	OUN	Marshall	44 min
Jul 15, 3:10 PM CDT	Severe Thunderstorm Warning	OUN	Garvin	50 min
Jul 15, 3:13 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	47 min
Jul 15, 3:21 PM CDT	Severe Thunderstorm Warning	OUN	Coal	54 min
Jul 15, 3:43 PM CDT	Severe Thunderstorm Warning	OUN	Marshall	47 min
Jul 15, 3:47 PM CDT	Severe Thunderstorm Warning	OUN	Pontotoc	43 min
Jul 15, 3:56 PM CDT	Severe Thunderstorm Warning	OUN	Carter	49 min
Jul 15, 4:50 PM CDT	Severe Thunderstorm Warning	OUN	Seminole	40 min
Jul 15, 5:34 PM CDT	Severe Thunderstorm Warning	OUN	Clay	41 min
Jul 15, 6:10 PM CDT	Severe Thunderstorm Warning	OUN	Clay	50 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1997 Every severe thunderstorm warning in 1997

Sources

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.