Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 1621

July 3, 20055 counties in Oklahoma; 4 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 3, 2005, 3:39 PM CDT for 5 counties in Oklahoma; 4 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: Jul 3, 2005, 3:39 PM CDT (20:39 UTC)
Expired: Jul 3, 2005, 5:15 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center

Counties Beaver County, OK, Ellis County, OK, Harper County, OK, Texas County, OK, Woodward County, OK, Hansford County, TX, Lipscomb County, TX, Ochiltree County, TX, Sherman County, TX

The radar

The Amarillo radar (KAMA), 159 km from the middle of the area, began a volume at 20:36 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.

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 12:00Z, 8.7 hours before the alert went out and 159 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: 1211 J/kg
Mixed-layer CIN: -365 J/kg
Mixed-layer LCL: 1942 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 342 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 032039
SWOMCD
SPC MCD 032039 
OKZ000-KSZ000-TXZ000-032215-

MESOSCALE DISCUSSION 1621
NWS STORM PREDICTION CENTER NORMAN OK
0339 PM CDT SUN JUL 03 2005

AREAS AFFECTED...OK PNHDL/NRN TX PNHDL

CONCERNING...SEVERE THUNDERSTORM POTENTIAL 

VALID 032039Z - 032215Z

SEVERE STORM POTENTIAL IS EXPECTED TO INCREASE LATE THIS AFTERNOON
INTO EARLY THIS EVENING. CONVECTIVE TRENDS WILL BE MONITORED FOR
POSSIBLE WW ISSUANCE.

VISIBLE SATELLITE IMAGERY SHOWS CUMULUS FIELD INCREASING OVER THE
WRN OK AND NWRN TX PNHDLS WITHIN HOT AND DEEPLY MIXED POST-DRYLINE
AIR MASS. CONTINUED DIABATIC HEATING E OF DRYLINE SHOULD SUPPORT EWD
DEVELOPMENT OF THESE DEEPER CONVECTIVE CIRCULATIONS...POSSIBLY
LEADING TO EVENTUAL TSTM DEVELOPMENT. TUCUMCARI PROFILER HAS SHOWN A
GRADUAL INCREASE IN TROPOSPHERIC FLOW OVER THE PAST SEVERAL
HOURS...WITH DEEP-LAYER VERTICAL SHEAR NOW MARGINAL SUPPORTIVE OF
ORGANIZED TSTMS. LARGE HAIL WILL INITIALLY BE THE PRIMARY SEVERE
WEATHER THREAT WITH ANY STORMS THAT DEVELOP. HOWEVER...GIVEN THE
LARGE TEMPERATURE-DEWPOINT SPREADS AND STEEP LAPSE RATES...POTENTIAL
WILL EXIST FOR DAMAGING WINDS...ESPECIALLY IF STORMS CAN ORGANIZE A
COLD POOL.

..MEAD.. 07/03/2005

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...OUN...DDC...AMA...

36550255 37000175 37009925 36809901 36439909 35999988
35840108 36090230

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 4:32 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Major, Woods, Woodward	118 min
Jul 2, 11:13 PM CDT	Mesoscale Discussion	SPC	Brazos, Chambers, Grimes, Hardin, Harris, Houston and 13 more	3 hr

Nearby

Mesoscale Discussions in Oklahoma, 2005 Mesoscale Discussions in Texas, 2005 Every mesoscale discussion in 2005

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.