Alert archive / Texas / Mesoscale Discussions in 2007
Mesoscale Discussion 749
The Storm Prediction Center issued this mesoscale discussion at May 7, 2007, 9:45 PM CDT for 18 counties in Oklahoma; 21 counties in Texas. It was in force for 60 min.
The area
The outline as issued.
The facts
- Issued
- May 7, 2007, 9:45 PM CDT (02:45 UTC)
- Expired
- May 7, 2007, 10:45 PM CDT
- In force
- 60 min
- Issued by
- the Storm Prediction Center
All 39 counties
Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Coal County, OK, Garvin County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Latimer County, OK, Love County, OK, Marshall County, OK, McCurtain County, OK, Murray County, OK, Pittsburg County, OK, Pontotoc County, OK, Pushmataha County, OK, Stephens County, OK, Camp County, TX, Clay County, TX, Collin County, TX, Cooke County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Franklin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Lamar County, TX, Montague County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Titus County, TX, Upshur County, TX, Wise County, TX, Wood County, TX
The radar
The Norman radar (KTLX), 186 km from the middle of the area, began a volume at 02:45 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, 2.8 hours before the alert went out and 174 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
- 2192 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1136 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 27 m²/s²
- 0-3 km storm-relative helicity
- 184 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 080245 SWOMCD SPC MCD 080245 ARZ000-TXZ000-OKZ000-080345- MESOSCALE DISCUSSION 0749 NWS STORM PREDICTION CENTER NORMAN OK 0945 PM CDT MON MAY 07 2007 AREAS AFFECTED...NCNTRL TX...SERN OK CONCERNING...TORNADO WATCH 255... VALID 080245Z - 080345Z THE SEVERE WEATHER THREAT FOR TORNADO WATCH 255 CONTINUES. SMALL SCALE BOW-TYPE STRUCTURE HAS EVOLVED BENEATH OLD MCV AS IT MOVES NEWD AT ROUGHLY 30-35 KT THROUGH BRYAN COUNTY OK. THIS COMPACT CLUSTER OF TSTMS SHOULD PROGRESS ACROSS THE NERN QUARTER OF THE ONGOING WATCH...POSSIBLY EXPANDING IN AREAL COVERAGE AS CONVECTION IS FORCED ATOP OLD CONVECTIVE BUBBLE HIGH. DAMAGING WINDS AND LARGE HAIL ARE THE MOST LIKELY SEVERE THREATS WITH THIS CONVECTION. WITH TIME...ADDITIONAL CONVECTION MAY DEVELOP FROM THE WEST INTO WRN PORTIONS OF THE WATCH AS LOW LEVEL WARM ADVECTION INTENSIFIES INTO THE TX SOUTH PLAINS REGION. ..DARROW.. 05/08/2007 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SHV...TSA...FWD...OUN... 34069840 34129812 34689812 34689766 34869765 34899656 35289645 35289601 35179588 35329545 35089535 35069493 34799503 34529494 34519449 33639447 33699474 33369475 32929468 32679470 32569491 32579528 32679556 32849593 32869629 32989628 32999842
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 7:15 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Johnston, Love and 1 more | 60 min |
| May 7, 7:32 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Carter, Choctaw, Coal, Garvin and 12 more | 7 hr |
| May 8, 2:46 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Coal, Jefferson, Johnston and 4 more | 2 hr |
| May 8, 3:41 PM CDT | Severe Thunderstorm Watch | SPC | Comanche, Cotton, Jackson, Jefferson, Kiowa, Stephens and 1 more | 6 hr |
| May 8, 5:09 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Jackson, Jefferson, Kiowa, Stephens and 1 more | 96 min |
| May 8, 5:29 PM CDT | Tornado Watch | SPC | Caddo, Comanche, Cotton, Grady, Jackson, Jefferson and 3 more | 5 hr |
| May 7, 8:37 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Borden, Briscoe, Childress, Coke, Cottle and 38 more | 7 hr |
| May 7, 9:23 PM CDT | Mesoscale Discussion | SPC | Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more | 67 min |
| May 7, 11:15 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Cochran, Crosby, Dawson, Dickens and 12 more | 60 min |
| May 7, 11:43 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Cochran, Crosby, Dawson, Dickens and 17 more | 62 min |
| May 8, 11:19 AM CDT | Mesoscale Discussion | SPC | Borden, Callahan, Coke, Crane, Ector, Fisher and 20 more | 116 min |
| May 8, 12:01 PM CDT | Tornado Watch | SPC | Andrews, Borden, Brewster, Coke, Crane, Crockett and 27 more | 7 hr |
| May 8, 2:44 PM CDT | Mesoscale Discussion | SPC | Coke, Crockett, Fisher, Glasscock, Irion, Mitchell and 6 more | 91 min |
| May 8, 6:13 PM CDT | Mesoscale Discussion | SPC | Bandera, Edwards, Kerr, Kinney, Medina, Real and 2 more | 62 min |
| May 8, 6:58 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Dimmit, Edwards, Gillespie, Kendall, Kerr and 8 more | 4 hr |
Nearby
Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Oklahoma, 2007Every mesoscale discussion in 2007
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.