Alert archive / Kansas / Mesoscale Discussions in 2004
Mesoscale Discussion 810
The Storm Prediction Center issued this mesoscale discussion at May 21, 2004, 8:40 PM CDT for 14 counties in Kansas; Beaver County, Ellis County, Harper County, Oklahoma; 12 counties in Texas. It was in force for 95 min.
The area
The outline as issued.
The facts
- Issued
- May 21, 2004, 8:40 PM CDT (01:40 UTC)
- Expired
- May 21, 2004, 10:15 PM CDT
- In force
- 95 min
- Issued by
- the Storm Prediction Center
All 29 counties
Clark County, KS, Edwards County, KS, Ellis County, KS, Ford County, KS, Gray County, KS, Hodgeman County, KS, Kiowa County, KS, Meade County, KS, Ness County, KS, Osborne County, KS, Pawnee County, KS, Rooks County, KS, Rush County, KS, Trego County, KS, Beaver County, OK, Ellis County, OK, Harper County, OK, Armstrong County, TX, Carson County, TX, Collingsworth County, TX, Donley County, TX, Gray County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Ochiltree County, TX, Randall County, TX, Roberts County, TX, Wheeler County, TX
The radar
The Dodge City radar (KDDC), 103 km from the middle of the area, began a volume at 01:40 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
Dodge City, (KDDC), launched 00:00Z, 1.7 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
- 2863 J/kg
- Mixed-layer CIN
- -19 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 148 m²/s²
- 0-3 km storm-relative helicity
- 281 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 18.3
The text
As transmitted, in the capitals the NWS used until 2016.
461 ACUS11 KWNS 220141 SWOMCD SPC MCD 220140 KSZ000-OKZ000-TXZ000-220315- MESOSCALE DISCUSSION 0810 NWS STORM PREDICTION CENTER NORMAN OK 0840 PM CDT FRI MAY 21 2004 AREAS AFFECTED...WRN KS AND TX/OK PANHANDLES CONCERNING...SEVERE THUNDERSTORM WATCH 240... VALID 220140Z - 220315Z THREAT FOR LARGE HAIL -- AND POSSIBLY ISOLD DAMAGING WINDS -- WILL PERSIST WITH ONGOING SUPERCELLS/MULTICELLS ACROSS WRN KS AND ERN TX/OK PANHANDLES FOR THE NEXT HOUR OR TWO...CONTINUE REMAINING VALID PORTIONS OF SEVERE WW 240. LATEST MESOANALYSIS IN CONJUNCTION WITH 00Z DDC/AMA SOUNDINGS SUGGESTS 2500-3500 J/KG MLCAPE REMAINS ACROSS PORTIONS OF WRN KS AND ERN OK/TX PANHANDLES AHEAD OF DRYLINE. SUFFICIENT DEEP LAYER SHEAR /AROUND 40 KTS/ WILL CONTINUE TO SUPPORT ORGANIZED STORMS/SUPERCELLS OVER THE NEXT FEW HOURS...WITH MAIN THREAT OF LARGE HAIL OWING TO VERY UNSTABLE AIRMASS. WITH TIME...LOSS OF DIABATIC HEATING/SURFACE BASED INSTABILITY IS EXPECTED TO LEAD TO DIMINISHING TREND OF SEVERE THREAT ACROSS WW 240...WITH EXPANSION/REISSUANCE OF WW NOT ANTICIPATED. ..GUYER.. 05/22/2004 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...ICT...OUN...GID...DDC...GLD...AMA... 34820214 38220027 39529978 39509864 34810013
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 7:40 PM CDT | Tornado Watch | SPC | Cloud, Jewell, Mitchell, Osborne, Phillips, Republic and 2 more | 5 hr |
| May 21, 10:01 PM CDT | Mesoscale Discussion | SPC | Cloud, Jewell, Mitchell, Osborne, Phillips, Republic and 2 more | 89 min |
| May 22, 1:13 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 2 hr |
| May 22, 2:00 PM CDT | Tornado Watch | SPC | Cheyenne, Rawlins, Sherman, Thomas | 6 hr |
| May 22, 3:04 PM CDT | Mesoscale Discussion | SPC | Cheyenne | 86 min |
| May 22, 3:52 PM CDT | Mesoscale Discussion | SPC | Barber, Barton, Clark, Clay, Cloud, Comanche and 20 more | 83 min |
| May 22, 5:50 PM CDT | Tornado Watch | SPC | Barton, Clay, Cloud, Dickinson, Ellsworth, Geary and 13 more | 5 hr |
Nearby
Mesoscale Discussions in Kansas, 2004Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Oklahoma, 2004Every mesoscale discussion in 2004
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.