Alert archive / Texas / Mesoscale Discussions in 2004
Mesoscale Discussion 784
The Storm Prediction Center issued this mesoscale discussion at May 20, 2004, 8:25 PM MDT for 5 counties in New Mexico; 11 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- May 20, 2004, 8:25 PM MDT (02:25 UTC)
- Expired
- May 20, 2004, 9:30 PM MDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
Counties Chaves County, NM, De Baca County, NM, Eddy County, NM, Lea County, NM, Roosevelt County, NM, Andrews County, TX, Bailey County, TX, Cochran County, TX, Crane County, TX, Ector County, TX, Gaines County, TX, Loving County, TX, Reeves County, TX, Ward County, TX, Winkler County, TX, Yoakum County, TX
The radar
The Midland/Odessa radar (KMAF), 121 km from the middle of the area, began a volume at 02:26 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
Midland Regional, TX (KMAF), launched 00:00Z, 2.4 hours before the alert went out and 119 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
- 1343 J/kg
- Mixed-layer CIN
- -192 J/kg
- Mixed-layer LCL
- 1437 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
982 ACUS11 KWNS 210226 SWOMCD SPC MCD 210225 TXZ000-NMZ000-210330- MESOSCALE DISCUSSION 0784 NWS STORM PREDICTION CENTER NORMAN OK 0925 PM CDT THU MAY 20 2004 AREAS AFFECTED...SERN NM/W TX CONCERNING...SEVERE THUNDERSTORM WATCH 223... VALID 210225Z - 210330Z LATEST RADAR TRENDS SUGGEST STORMS ARE WEAKENING ACROSS ERN NM/W TX. STORMS ARE CURRENTLY SUSTAINING THEMSELVES IN AXIS OF BEST INSTABILITY/MOISTURE...BUT AS THEY MOVE EWD THEY WILL ENCOUNTER A DRIER AND LESS FAVORABLE ENVIRONMENT. LATEST ETA/RUC MODEL DATA INDICATE THAT 45-50 KT LOW LEVEL JET WILL DEVELOP EAST OF CURRENT STORMS...THUS PROVIDING A FOCUS FOR ORGANIZED STORMS FARTHER NORTH ACROSS KS/NE LATER TONIGHT. STORMS ACROSS THIS WW ARE EXPECTED TO CONTINUE TO DIMINISH IN INTENSITY AND COVERAGE...AND THE WW WILL BE ALLOWED TO EXPIRE AS SCHEDULED AT 03Z. ..TAYLOR.. 05/21/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SJT...LUB...MAF...ABQ... 30860356 30970424 33370468 34480479 34500272 32470243 30950215 30930286
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 3:50 PM MDT | Severe Thunderstorm Watch | SPC | Armstrong, Carson, Collingsworth, Donley, Gray, Hansford and 9 more | 5 hr |
Nearby
Mesoscale Discussions in Texas, 2004Mesoscale Discussions in New Mexico, 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.