Alert archive / Texas / Mesoscale Discussions in 2016
Mesoscale Discussion 463
The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2016, 5:55 PM CDT for 17 counties in Texas. It was in force for 65 min.
The area
The outline as issued.
The facts
- Issued
- Apr 26, 2016, 5:55 PM CDT (22:55 UTC)
- Expired
- Apr 26, 2016, 7:00 PM CDT
- In force
- 65 min
- Issued by
- the Storm Prediction Center
Counties Archer County, TX, Baylor County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Eastland County, TX, Haskell County, TX, Jack County, TX, Jones County, TX, Knox County, TX, Palo Pinto County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Young County, TX
The radar
The Dyess AFB radar (KDYX), 40 km from the middle of the area, began a volume at 22:54 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
Fort Worth, TX (KFWD), launched 12:00Z, 10.9 hours before the alert went out and 209 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
- 1371 J/kg
- Mixed-layer CIN
- -286 J/kg
- Mixed-layer LCL
- 715 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 337 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
277
ACUS11 KWNS 262255
SWOMCD
SPC MCD 262255
TXZ000-270000-
MESOSCALE DISCUSSION 0463
NWS STORM PREDICTION CENTER NORMAN OK
0555 PM CDT TUE APR 26 2016
AREAS AFFECTED...TX BIG COUNTRY / WRN N-CNTRL TX
CONCERNING...TORNADO WATCH 109...
VALID 262255Z - 270000Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 109 CONTINUES.
SUMMARY...AN INCREASING THREAT FOR SEVERE GUSTS /POSSIBLY IN EXCESS
OF 65 KT/ WILL DEVELOP OVER WRN N-CNTRL TX AND PUSH EWD INTO N-CNTRL
TX LATER THIS EVENING. LARGE HAIL MAY ACCOMPANY THE STRONGER
UPDRAFTS. THE LINEAR MODE WILL TEND TO LIMIT TORNADO POTENTIAL WITH
THE EXCEPTION BEING AN ISOLD EMBEDDED CIRCULATION/MESOVORTEX AS THE
QLCS MATURES THIS EVENING.
DISCUSSION...WATER VAPOR IMAGERY INDICATES THE LEADING EDGE OF
STRONG DEEP-LAYER FORCING FOR ASCENT IS IMPINGING ON THE LEE
TROUGH/DRYLINE OVER NWRN TX EARLY THIS EVENING. IN RESPONSE TO THIS
INCREASED FORCING FOR ASCENT...AN INTENSIFYING QLCS HAS DEVELOPED
FROM KNOX COUNTY SSWWD INTO STERLING AND MITCHELL COUNTIES. IT
APPEARS HIGHLY UNLIKELY GIVEN THE TRANSITION TO LINEAR MODE AND
SYNOPTIC FORCING FOR ASCENT THAT STORMS WILL EVOLVE INTO A DISCRETE
MODE. AS A RESULT...SEVERE WIND GUSTS /PERHAPS LOCALLY IN EXCESS OF
65 KT WITH THE STRONGER MICROBURSTS/ AND LARGE HAIL --OWING TO STEEP
H7-H5 LAPSE RATES-- ARE BECOMING THE PRIMARY THREATS THIS EVENING.
..SMITH.. 04/26/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...FWD...OUN...SJT...LUB...
LAT...LON 33559993 33979873 33389805 32149857 31709975 31840105
32340022 33559993SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 1:53 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 34 more | 2 hr |
| Apr 26, 2:32 PM CDT | Tornado Watch | SPC | Archer, Baylor, Bosque, Brown, Callahan, Clay and 46 more | 9 hr |
| Apr 26, 3:40 PM CDT | Mesoscale Discussion | SPC | Borden, Fisher, Glasscock, Howard, Kent, Mitchell and 4 more | 95 min |
Nearby
Mesoscale Discussions in Texas, 2016Every mesoscale discussion in 2016
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.