Alert archive / Oklahoma / Mesoscale Discussions in 2005
Mesoscale Discussion 862
The Storm Prediction Center issued this mesoscale discussion at May 13, 2005, 3:50 PM CDT for Chautauqua County, Harper County, Montgomery County, Kansas; 14 counties in Oklahoma. It was in force for 85 min.
The area
The outline as issued.
The facts
- Issued
- May 13, 2005, 3:50 PM CDT (20:50 UTC)
- Expired
- May 13, 2005, 5:15 PM CDT
- In force
- 85 min
- Issued by
- the Storm Prediction Center
Counties Chautauqua County, KS, Harper County, KS, Montgomery County, KS, Alfalfa County, OK, Craig County, OK, Garfield County, OK, Grant County, OK, Harper County, OK, Kay County, OK, Major County, OK, Noble County, OK, Nowata County, OK, Osage County, OK, Pawnee County, OK, Washington County, OK, Woods County, OK, Woodward County, OK
The radar
The Vance AFB radar (KVNX), 34 km from the middle of the area, began a volume at 20:51 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
Lamont, OK (KLMN), launched 12:00Z, 8.8 hours before the alert went out and 28 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
- 8 J/kg
- Mixed-layer CIN
- -435 J/kg
- Mixed-layer LCL
- 1421 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 221 m²/s²
- 0-3 km storm-relative helicity
- 250 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 ACUS11 KWNS 132050 SWOMCD SPC MCD 132050 OKZ000-KSZ000-132215- MESOSCALE DISCUSSION 0862 NWS STORM PREDICTION CENTER NORMAN OK 0350 PM CDT FRI MAY 13 2005 AREAS AFFECTED...NRN OK INTO SRN KS CONCERNING...SEVERE THUNDERSTORM POTENTIAL VALID 132050Z - 132215Z SEVERE TSTM POTENTIAL APPEARS TO BE INCREASING ACROSS PORTIONS OF NRN OK INTO SRN KS AND CONDITIONS ARE BEING MONITORED FOR A POSSIBLE WW ISSUANCE. LATEST MESOANALYSIS INDICATED AN AREA OF LOW PRESSURE OVER THE FAR ERN OK PNHDL WITH ASSOCIATED FRONTAL BOUNDARY EXTENDING SEWD FROM THIS FEATURE TO S OF END AND THEN MORE NEWD TO N OF TUL. CONSIDERABLE LOW CLOUDINESS HAS LIMITED DIABATIC HEATING AND RESULTANT DESTABILIZATION ALONG THIS BOUNDARY...THOUGH RUC FIELDS SUGGEST THAT CAP HAS BECOME RELATIVELY WEAK WITH MLCAPES OF 1000-1500 J/KG FROM VICINITY OF SURFACE LOW EWD ALONG FRONTAL ZONE TO I-35. LATEST RADAR TRENDS INDICATE AN INCREASE IN CONVECTION FROM WOODS AND MAJOR COUNTIES EWD INTO GARFIELD AND NOBLE COUNTIES OF N-CNTRL OK. CONTINUED HEATING/DESTABILIZATION COUPLED WITH INCREASED LARGE-SCALE FORCING FOR ASCENT ASSOCIATED WITH SHORTWAVE/THERMAL TROUGH MOVING THROUGH THE TX PNHDL INTO WRN OK SHOULD CONTRIBUTE TO A FURTHER INCREASE IN STORM COVERAGE AND INTENSITY. CURRENT LAMONT PROFILER INDICATES A QUITE FAVORABLE SHEAR PROFILE FOR SUPERCELLS WITH STRONGLY VEERING WINDS WITH HEIGHT AND 50 KTS OF DEEP-LAYER SHEAR. WHILE LARGE HAIL WILL BE PRIMARY SEVERE WEATHER THREAT WITH ANY STORMS THAT DEVELOP...RELATIVELY STRONG OBSERVED LOW-LEVEL SHEAR /0-1 KM SRH OF 150-200 M2/S2/ ALSO SUGGEST THE POTENTIAL FOR ISOLATED TORNADOES. CONVECTIVE TRENDS WILL CONTINUE TO BE MONITORED AND WW MAY BE REQUIRED WITHIN NEXT HOUR OR SO. ..MEAD.. 05/13/2005 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...SGF...TSA...ICT...OUN...DDC... 37029983 37169911 37239687 37169478 36689492 36129643 36069825 36369969
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 12, 8:26 PM CDT | Mesoscale Discussion | SPC | Atchison, Douglas, Jackson, Jefferson, Johnson, Leavenworth and 4 more | 34 min |
| May 12, 9:35 PM CDT | Mesoscale Discussion | SPC | Barber, Butler, Chase, Coffey, Comanche, Cowley and 14 more | 85 min |
| May 13, 5:05 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Bourbon, Chautauqua, Cherokee, Comanche, Cowley and 8 more | 7 hr |
| May 12, 7:56 PM CDT | Mesoscale Discussion | SPC | Beckham, Greer, Harmon, Jackson | 64 min |
| May 12, 8:40 PM CDT | Tornado Watch | SPC | Greer, Harmon, Jackson | 5 hr |
| May 12, 10:48 PM CDT | Mesoscale Discussion | SPC | Caddo, Comanche, Cotton, Garvin, Grady, Jefferson and 3 more | 57 min |
| May 12, 11:35 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 17 more | 5 hr |
| May 13, 1:04 AM CDT | Mesoscale Discussion | SPC | Caddo, Canadian, Comanche, Cotton, Garfield, Grady and 5 more | 86 min |
| May 13, 4:04 AM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Stephens, Tillman | 56 min |
| May 13, 1:52 PM CDT | Mesoscale Discussion | SPC | Harmon, Jackson | 83 min |
| May 13, 2:10 PM CDT | Tornado Watch | SPC | Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more | 7 hr |
| May 13, 5:56 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Caddo, Comanche, Cotton, Custer and 8 more | 64 min |
| May 13, 6:25 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Blaine, Custer, Dewey, Garfield, Grant and 12 more | 65 min |
| May 13, 6:45 PM CDT | Tornado Watch | SPC | Blaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 20 more | 7 hr |
Nearby
Mesoscale Discussions in Oklahoma, 2005Mesoscale Discussions in Kansas, 2005Every mesoscale discussion in 2005
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.