Alert archive / Kansas / Mesoscale Discussions in 2003

Mesoscale Discussion 651

April 30, 200329 counties in Kansas; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Apr 30, 2003, 9:52 PM CDT for 29 counties in Kansas; 8 counties in Oklahoma. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
Apr 30, 2003, 9:52 PM CDT (02:52 UTC)
Expired
Apr 30, 2003, 11:15 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 37 counties

Allen County, KS, Anderson County, KS, Atchison County, KS, Butler County, KS, Chase County, KS, Chautauqua County, KS, Coffey County, KS, Cowley County, KS, Doniphan County, KS, Douglas County, KS, Elk County, KS, Franklin County, KS, Greenwood County, KS, Harvey County, KS, Jackson County, KS, Jefferson County, KS, Labette County, KS, Lyon County, KS, Marion County, KS, Montgomery County, KS, Morris County, KS, Neosho County, KS, Osage County, KS, Sedgwick County, KS, Shawnee County, KS, Sumner County, KS, Wabaunsee County, KS, Wilson County, KS, Woodson County, KS, Garfield County, OK, Grant County, OK, Kay County, OK, Logan County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK

The radar

The Wichita radar (KICT), 88 km from the middle of the area, began a volume at 02:52 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

Topeka, KS (KTOP), launched 00:00Z, 2.9 hours before the alert went out and 154 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.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2003-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3988 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2003-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3988 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1381 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
122 m²/s²
Significant tornado parameter
1.0
Supercell composite
10.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 7:30 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Butler, Chase, Chautauqua and 23 more6 hr
Apr 30, 7:31 PM CDTMesoscale DiscussionSPCDoniphan, Johnson, Leavenworth, Wyandotte119 min
Apr 30, 9:22 PM CDTMesoscale DiscussionSPCBourbon, Crawford, Linn, Miami83 min
Apr 30, 9:30 PM CDTSevere Thunderstorm WatchSPCBourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more6 hr
Apr 30, 10:31 PM CDTMesoscale DiscussionSPCDoniphan, Johnson, Leavenworth, Wyandotte89 min
Apr 30, 11:47 PM CDTMesoscale DiscussionSPCAllen, Anderson, Butler, Chase, Chautauqua, Coffey and 13 more118 min
May 1, 12:00 AM CDTMesoscale DiscussionSPCBourbon, Cherokee, Crawford, Johnson, Leavenworth, Linn and 2 more90 min
May 1, 12:10 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 22 more5 hr
May 1, 2:27 AM CDTMesoscale DiscussionSPCAllen, Anderson, Bourbon, Chautauqua, Cherokee, Coffey and 10 more2 hr
May 1, 12:58 PM CDTMesoscale DiscussionSPCCheyenne, Rawlins, Sherman, Wallace2 hr
Apr 30, 8:17 PM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more88 min
May 1, 10:55 AM CDTMesoscale DiscussionSPCBryan, Coal, Johnston, Love, Marshall2 hr
May 1, 2:13 PM CDTMesoscale DiscussionSPCChoctaw, Haskell, Latimer, LeFlore, McCurtain, McIntosh and 4 more3 hr
May 1, 3:45 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 11 more5 hr
May 1, 6:58 PM CDTMesoscale DiscussionSPCAdair, Cherokee, Choctaw, Delaware, Haskell, Latimer and 12 more92 min

Nearby

Mesoscale Discussions in Kansas, 2003Mesoscale Discussions in Oklahoma, 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.