Alert archive / Texas / Mesoscale Discussions in 2006
Mesoscale Discussion 813
The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 4:56 PM CDT for 4 counties in Kansas; 11 counties in Oklahoma; 21 counties in Texas. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2006, 4:56 PM CDT (21:56 UTC)
- Expired
- May 9, 2006, 7:00 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 36 counties
Clark County, KS, Comanche County, KS, Meade County, KS, Seward County, KS, Beaver County, OK, Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Harper County, OK, Major County, OK, Roger Mills County, OK, Texas County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Collingsworth County, TX, Deaf Smith County, TX, Donley County, TX, Gray County, TX, Hansford County, TX, Hartley County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Moore County, TX, Ochiltree County, TX, Oldham County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Sherman County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 107 km from the middle of the area, began a volume at 21:58 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 9.9 hours before the alert went out and 106 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
- 107 J/kg
- Mixed-layer CIN
- -342 J/kg
- Mixed-layer LCL
- 729 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 57 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 092156 SWOMCD SPC MCD 092156 OKZ000-KSZ000-TXZ000-NMZ000-100000- MESOSCALE DISCUSSION 0813 NWS STORM PREDICTION CENTER NORMAN OK 0456 PM CDT TUE MAY 09 2006 AREAS AFFECTED...PARTS SW KS...THE TX/OK PHNDLS...AND WRN OK CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 092156Z - 100000Z TRENDS ARE BEING MONITORED FOR AN INCREASING SEVERE THREAT AND THE POSSIBILITY OF AN ADDITIONAL WW BY EARLY EVENING. STRONG MID/UPPER FORCING FOR UPWARD VERTICAL MOTION IS READILY EVIDENT IN WATER VAPOR IMAGERY SPREADING EAST SOUTHEAST OF THE CENTRAL ROCKIES...ASSOCIATED WITH DIGGING MID/UPPER JET ACROSS THE INTERMOUNTAIN WEST. THIS IS CONTRIBUTING TO DEVELOPING CLUSTER OF STORMS ACROSS THE SOUTH CENTRAL HIGH PLAINS...NOW WEST THROUGH NORTH OF DALHART TEXAS. GIVEN LOW SURFACE DEW POINTS IN POST OUTFLOW/FRONTAL ENVIRONMENT...CAPE IS WEAK...BUT LAPSE RATES ARE STEEP AND MAY SUPPORT INCREASING SEVERE POTENTIAL WITH EVOLVING CONVECTIVE CLUSTER AS IT DEVELOPS SOUTHEASTWARD THROUGH 00Z. LARGE LOW-LEVEL TEMPERATURE/DEW POINT SPREADS WILL SUPPORT POTENTIAL FOR DAMAGING DOWNBURSTS. AND...MODERATE EASTERLY COMPONENT TO LOW-LEVEL FLOW AHEAD OF DEVELOPING SOUTHERN PLAINS SURFACE LOW SEEMS LIKELY TO CONTRIBUTE TO FAVORABLE SYSTEM RELATIVE FLOW CONFIGURATION FOR INCREASINGLY ORGANIZED CONVECTIVE CLUSTER BENEATH 40 KT MID-LEVEL FLOW. ..KERR.. 05/09/2006 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...OUN...DDC...LUB...AMA...ABQ... 36510185 37080122 37340032 37239936 37029882 36659825 36149810 35369926 34790004 34510116 34510201 34840331 35220357 35700349 36040255
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 7:47 PM CDT | Mesoscale Discussion | SPC | Barton, Brown, Clay, Cloud, Ellis, Gray and 15 more | 58 min |
| May 8, 10:59 PM CDT | Mesoscale Discussion | SPC | Atchison, Barber, Barton, Brown, Butler, Chase and 50 more | 91 min |
| May 8, 11:40 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Comanche, Edwards, Harper, Harvey, Kingman and 7 more | 5 hr |
| May 9, 1:13 AM CDT | Mesoscale Discussion | SPC | Chautauqua, Cherokee, Cowley, Crawford, Elk, Labette and 4 more | 92 min |
| May 9, 4:24 AM CDT | Severe Thunderstorm Watch | SPC | Chautauqua, Cherokee, Elk, Labette, Montgomery | 4 hr |
| May 9, 4:46 PM CDT | Mesoscale Discussion | SPC | Cherokee, Labette, Montgomery | 89 min |
| May 9, 3:45 PM CDT | Mesoscale Discussion | SPC | Atoka, Bryan, Carter, Choctaw, Cleveland, Coal and 24 more | 2 hr |
| May 9, 4:04 PM CDT | Tornado Watch | SPC | Atoka, Bryan, Choctaw, Coal, Haskell, Hughes and 12 more | 7 hr |
| May 9, 5:07 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Creek, Delaware, Mayes, Muskogee and 5 more | 6 hr |
| May 9, 6:01 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Beckham, Custer, Dewey, Ellis, Greer and 8 more | 7 hr |
| May 9, 6:30 PM CDT | Mesoscale Discussion | SPC | Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 17 more | 90 min |
| May 8, 7:42 PM CDT | Mesoscale Discussion | SPC | Newton | 93 min |
| May 9, 4:08 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Burnet, Comal, Edwards, Gillespie and 11 more | 97 min |
| May 9, 6:30 PM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bell, Bexar, Blanco, Burnet and 27 more | 4 hr |
Nearby
Mesoscale Discussions in Texas, 2006Mesoscale Discussions in Oklahoma, 2006Mesoscale Discussions in Kansas, 2006Every mesoscale discussion in 2006
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.