Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 1010

May 25, 200514 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 25, 2005, 4:56 PM CDT for 14 counties in Texas. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: May 25, 2005, 4:56 PM CDT (21:56 UTC)
Expired: May 25, 2005, 6:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Angelina County, TX, Cherokee County, TX, Grimes County, TX, Houston County, TX, Leon County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Polk County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX

The radar

The Houston radar (KHGX), 189 km from the middle of the area, began a volume at 21:56 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

Shreveport, LA (KSHV), launched 12:00Z, 9.9 hours before the alert went out and 208 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: 148 J/kg
Mixed-layer CIN: -292 J/kg
Mixed-layer LCL: 844 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

000 
ACUS11 KWNS 252157
SWOMCD
SPC MCD 252156 
TXZ000-252330-

MESOSCALE DISCUSSION 1010
NWS STORM PREDICTION CENTER NORMAN OK
0456 PM CDT WED MAY 25 2005

AREAS AFFECTED...EAST TX

CONCERNING...SEVERE THUNDERSTORM WATCH 332...

VALID 252156Z - 252330Z

A BOWED LINE OF SEVERE STORMS CURRENTLY OVER EAST TX WILL CONTINUE
TO BE ACCOMPANIED BY DAMAGING WINDS AND HAIL. THE LINE WILL MOVE
ACROSS THE SEWD PART OF WW 332 OVER THE NEXT 2 HOURS.

SFC ANALYSIS SHOWS A QUASI-STATIONARY FRONT EXTENDING SEWD FROM FAR
NE TX ACROSS WRN AND SRN LA. A MOIST AXIS EXISTS ACROSS EAST TX
WHERE SFC DEWPOINTS RANGE FROM 68 TO 72 DEGREE F. THE LINE OF
CONVECTION IS MOVING SEWD DOWN THIS MOIST AXIS AND THE RELATIVELY
HIGH DEWPOINTS SHOULD FUEL THE LINE OVER THE NEXT FEW HOURS.
OBJECTIVE ANALYSIS SHOWS A WEAK MID-LEVEL JET IN NE TX AND PROFILERS
SHOW ABOUT 35 KT OF FLOW AT 6 KM ASSOCIATED WITH THIS SPEED MAX. AS
THE JET CONTINUES TO MOVE SEWD...SHEAR PROFILES SHOULD REMAIN
FAVORABLE FOR SEVERE STORMS THIS EVENING. AS THE LINE MOVES SEWD
TOWARD THE SE EDGE OF WW 332...A NEW WATCH MAY BECOME NECESSARY IN
SE TX AND ACROSS PARTS OF SW LA LATER THIS EVENING.

..BROYLES.. 05/25/2005

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

ATTN...WFO...LCH...SHV...HGX...FWD...

31279644 31679603 31969518 32029462 31469419 31039400
30559425 30259513 30199579 31049635

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 24, 7:17 PM CDT	Mesoscale Discussion	SPC	Bowie, Cass	118 min
May 24, 10:28 PM CDT	Mesoscale Discussion	SPC	Lipscomb, Ochiltree	2 hr
May 24, 11:05 PM CDT	Severe Thunderstorm Watch	SPC	Hansford, Hemphill, Hutchinson, Lipscomb, Ochiltree, Roberts	6 hr
May 25, 12:42 AM CDT	Mesoscale Discussion	SPC	Hansford, Hemphill, Hutchinson, Lipscomb, Ochiltree, Roberts	93 min
May 25, 3:39 AM CDT	Mesoscale Discussion	SPC	Hansford, Hemphill, Hutchinson, Lipscomb, Ochiltree, Roberts	66 min
May 25, 7:51 AM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Childress, Clay, Collingsworth, Foard and 8 more	84 min
May 25, 9:20 AM CDT	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Archer, Camp, Cass, Cherokee and 41 more	7 hr
May 25, 12:14 PM CDT	Mesoscale Discussion	SPC	Anderson, Archer, Camp, Cass, Cherokee, Clay and 39 more	91 min
May 25, 1:59 PM CDT	Mesoscale Discussion	SPC	Bell, Bosque, Brown, Burnet, Callahan, Coke and 23 more	91 min
May 25, 2:45 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Angelina, Camp, Cherokee, Ellis, Franklin and 18 more	5 hr
May 25, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Andrews, Bell, Borden, Bosque, Brown, Callahan and 38 more	7 hr

Nearby

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.