Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 28
The Storm Prediction Center issued this mesoscale discussion at Jan 24, 2004, 7:56 PM CST for 28 counties in Texas. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Jan 24, 2004, 7:56 PM CST (01:56 UTC)
- Expired
- Jan 24, 2004, 9:30 PM CST
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 28 counties
Angelina County, TX, Austin County, TX, Brazoria County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Newton County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 108 km from the middle of the area, began a volume at 01:55 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
Lake Charles Mun, LA (KLCH), launched 00:00Z, 1.9 hours before the alert went out and 201 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.
- Mixed-layer CAPE
- 78 J/kg
- Mixed-layer CIN
- -34 J/kg
- Mixed-layer LCL
- 558 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 223 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
887 ACUS11 KWNS 250156 SWOMCD SPC MCD 250156 LAZ000-TXZ000-250330- MESOSCALE DISCUSSION 0028 NWS STORM PREDICTION CENTER NORMAN OK 0756 PM CST SAT JAN 24 2004 AREAS AFFECTED...SOUTHEAST TX CONCERNING...TORNADO WATCH 1... VALID 250156Z - 250330Z THREAT FOR SEVERE STORMS REMAINS LIKELY ACROSS WW 1 THIS EVENING. REGIONAL RADARS SHOW A BROKEN LINE OF STORMS EXTENDING FROM NE TX /20 S TXK/ SWWD TO 50 NNW VCT...WITH INDIVIDUAL CELLS MOVING ENEWD AT 45 KT. A NARROW INSTABILITY AXIS REMAINS JUST EAST OF THESE STORMS FROM VCT/PSX TO SERN/ERN TX WHERE SLY SURFACE WINDS ARE MAINTAINING A MOIST ENVIRONMENT WITH SURFACE DEWPOINTS IN THE LOWER TO MIDDLE 60S. OBJECTIVE ANALYSES INDICATE THE WEAK CAP ACROSS THIS REGION PER LCH 00Z SOUNDING IS WEAKENING AS UVVS ASSOCIATED WITH A NERN TX SHORT WAVE TROUGH SPREAD ACROSS SERN/ERN TX. FURTHER WEAKENING OF THE CAP IS EXPECTED AS ADDITIONAL LARGE SCALE ASCENT SPREADS NEWD IN ASSOCIATION WITH THE EXIT REGION OF A 70-75 KT SWLY MID-LEVEL JET ROUNDING THE BASE OF THE SRN PLAINS UPPER TROUGH. DESPITE MARGINAL INSTABILITY ACROSS SERN TX...INCREASING UVVS SPREADING ACROSS WW 1 AND SUFFICIENT DEEP LAYER SHEAR FOR ORGANIZED STORMS ARE EXPECTED TO SUPPORT A CONTINUED SEVERE POTENTIAL FOR AT LEAST THE NEXT SEVERAL HOURS. ..PETERS.. 01/25/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...LCH...SHV...HGX...FWD...CRP...EWX... 31569577 31569341 28739453 28759684
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 24, 10:46 PM CST | Mesoscale Discussion | SPC | Angelina, Austin, Brazoria, Chambers, Colorado, Fort Bend and 17 more | 89 min |
| Jan 25, 1:11 AM CST | Mesoscale Discussion | SPC | Jefferson, Orange | 2 hr |
Nearby
Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004
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.