Alert archive / Kansas / Mesoscale Discussions in 2003
Mesoscale Discussion 964
The Storm Prediction Center issued this mesoscale discussion at May 13, 2003, 8:38 PM CDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- May 13, 2003, 8:38 PM CDT (01:38 UTC)
- Expired
- May 13, 2003, 10:45 PM CDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Fremont County, IA, Page County, IA, Brown County, KS, Clay County, KS, Cloud County, KS, Marshall County, KS, Nemaha County, KS, Ottawa County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Atchison County, MO, Holt County, MO, Nodaway County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE
The radar
The Topeka radar (KTWX), 105 km from the middle of the area, began a volume at 01:41 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
Topeka, KS (KTOP), launched 00:00Z, 1.6 hours before the alert went out and 137 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
- 92 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 65 m²/s²
- 0-3 km storm-relative helicity
- 117 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
569 ACUS11 KWNS 140139 SWOMCD SPC MCD 140138 IAZ000-MOZ000-KSZ000-NEZ000-140345- MESOSCALE DISCUSSION 0964 NWS STORM PREDICTION CENTER NORMAN OK 0838 PM CDT TUE MAY 13 2003 AREAS AFFECTED...SERN NEB...NERN KS...SWRN IA AND NWRN MO CONCERNING...SEVERE THUNDERSTORM WATCH 363... VALID 140138Z - 140345Z SQUALL LINE EXPECTED TO CONTINUE SEWD THROUGH SERN NEB...NERN KS...SWRN IA AND INTO NWRN MO NEXT COUPLE HOURS WITH THREAT FOR LARGE HAIL AND DAMAGING WIND. STRONGEST STORMS ARE EXPECTED TO REMAIN ON SWRN FLANKS OF THE LINE FROM SERN NEB INTO NCNTRL AND PARTS OF NE KS AND ACTIVITY MAY EVENTUALLY DEVELOP SWD TOWARD CNTRL KS. THIS EVENING A COLD FRONT EXTENDS FROM A SURFACE LOW IN ERN NEB SWWD THROUGH N CNTRL AND SWRN KS AND IS MOVING SEWD. LINE OF STORMS CONTINUE ALONG AND E OF THIS BOUNDARY MOVING SEWD AT AROUND 30 KT. AXIS OF MODERATE INSTABILITY EXISTS SE OF SQUALL LINE FROM SE NEB-N CNTRL KS INTO A PORTION OF NERN KS WHERE AXIS OF LOW 60S DEWPOINTS HAVE ADVECTED NWD INTO PRE-CONVECTIVE WARM SECTOR AND UNDERNEATH COLD MID LEVEL TEMPERATURES. STORMS SHOULD CONTINUE DEVELOPING SEWD ALONG FRONTAL ZONE THROUGH THE INSTABILITY AXIS NEXT COUPLE HOURS. THE TOP EVENING SOUNDING SHOWED ONLY MARGINAL INSTABILITY AND A STRONG CAP. THUS EWD EXTENT OF SEVERE THREAT APPEARS LIMITED. HOWEVER...THE STRONGER STORMS MAY CONTINUE DEVELOPING SWD TOWARD THETA-E RIDGE THROUGH E CNTRL KS LATER THIS EVENING. ..DIAL.. 05/14/2003 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DMX...EAX...OAX...TOP...ICT...GID... 39689835 40389677 41039504 40249462 39669587 38759745 39219809
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 12:36 PM CDT | Mesoscale Discussion | SPC | Des Moines, Henry, Johnson, Lee, Louisa, Muscatine and 1 more | 84 min |
| May 14, 12:40 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Cass, Clarke and 22 more | 95 min |
| May 14, 2:00 PM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 34 more | 5 hr |
| May 14, 3:23 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 33 more | 97 min |
| May 13, 9:58 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Cowley, Harper, Sumner | 3 hr |
| May 13, 10:20 PM CDT | Severe Thunderstorm Watch | SPC | Clark | 7 hr |
| May 14, 4:52 PM CDT | Mesoscale Discussion | SPC | Barber, Comanche, Harper | 113 min |
| May 14, 6:45 PM CDT | Severe Thunderstorm Watch | SPC | Lincoln | 5 hr |
Nearby
Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Nebraska, 2003Mesoscale Discussions in Missouri, 2003Every mesoscale discussion in 2003
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.