Alert archive / Texas / Mesoscale Discussions in 2015
Mesoscale Discussion 2
The Storm Prediction Center issued this mesoscale discussion at Jan 1, 2015, 5:55 AM CST for 5 counties in Arkansas; 16 counties in Oklahoma; 19 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 1, 2015, 5:55 AM CST (11:55 UTC)
- Expired
- Jan 1, 2015, 12:00 PM CST
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Crawford County, AR, Franklin County, AR, Johnson County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Atoka County, OK, Bryan County, OK, Carter County, OK, Coal County, OK, Haskell County, OK, Johnston County, OK, Latimer County, OK, LeFlore County, OK, Love County, OK, Marshall County, OK, McIntosh County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Sequoyah County, OK, Callahan County, TX, Clay County, TX, Comanche County, TX, Cooke County, TX, Denton County, TX, Eastland County, TX, Erath County, TX, Grayson County, TX, Hood County, TX, Jack County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wise County, TX, Young County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 162 km from the middle of the area, began a volume at 11:54 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 00:00Z, 11.9 hours before the alert went out and 135 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 886 m above ground
- 0-6 km bulk shear
- 66 kt
- 0-1 km storm-relative helicity
- 97 m²/s²
- 0-3 km storm-relative helicity
- 399 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
711
ACUS11 KWNS 011156
SWOMCD
SPC MCD 011155
ARZ000-OKZ000-TXZ000-011800-
MESOSCALE DISCUSSION 0002
NWS STORM PREDICTION CENTER NORMAN OK
0555 AM CST THU JAN 01 2015
AREAS AFFECTED...NRN TX INTO SERN OK AND WRN AR
CONCERNING...FREEZING RAIN
VALID 011155Z - 011800Z
SUMMARY...SPORADIC SHOWERS OF FREEZING RAIN WILL PERSIST THIS
MORNING FROM NRN TX INTO WRN AR...WITH LIGHT ACCUMULATIONS POSSIBLE.
DISCUSSION...MOISTENING AND LIFT ASSOCIATED WITH AN APPROACHING
UPPER TROUGH WILL ALLOW EXISTING SHOWERS TO EVOLVE NEWD OUT OF TX
AND INTO SERN OK AND WRN AR. HRLY QPF RATES UP TO 0.04 INCHES HAVE
BEEN OBSERVED NEAR DALLAS BUT THE FREEZING RAIN ZONE WILL REMAIN
MAINLY TO THE NW.
ALTHOUGH SOME LOW-LEVEL WARMING/MIXING MAY OCCUR...EVAPORATIVE
COOLING WILL ALSO OCCUR WITH THE NET RESULT A NEARLY STATIONARY
SURFACE FREEZING LINE. AS SUCH...THE BEST THREAT FOR LIGHT ICING
WILL BE ALONG A MWL TO DTO TO FSM LINE THROUGH MIDDAY.
THEREAFTER...MUCH OF THE PRECIPITATION SHOULD BE IN THE FORM OF
RAIN.
..JEWELL.. 01/01/2015
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...LZK...TSA...FWD...OUN...SJT...
LAT...LON 32989943 33859823 34369721 34879653 35989476 36029379
35809339 35449342 34969423 34209567 33209694 32309758
31899822 31969887 32239947 32989943SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 31, 9:45 PM CST | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Concho and 23 more | 6 hr |
Nearby
Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Oklahoma, 2015Mesoscale Discussions in Arkansas, 2015Every mesoscale discussion in 2015
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.