Alert archive / Kansas / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 62, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at Apr 20, 2001, 11:35 PM CDT for Jefferson County, Kansas. It was in force for 40 min. 7 reports came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Apr 20, 2001, 11:35 PM CDT (04:35 UTC)
- Expired
- Apr 21, 2001, 12:15 AM CDT
- In force
- 40 min
- Issued by
- NWS Topeka, KS
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Jefferson County, KS
The radar
The Topeka radar (KTWX), 77 km from the middle of the area, began a volume at 04:39 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 20, 11:48 PM CDT | Hail 0.75 | Ozawkie, KS | |
| Apr 20, 11:50 PM CDT | Hail 0.88 | Ozawkie, KS | |
| Apr 20, 11:51 PM CDT | Hail 1.75 | Ozawkie, KS | |
| Apr 21, 12:00 AM CDT | Hail 1 | Winchester, KS | |
| Apr 21, 12:10 AM CDT | Hail 1 | Rock Creek, KS | |
| Apr 21, 12:13 AM CDT | Hail 1.5 | Newman, KS | |
| Apr 21, 12:15 AM CDT | Hail 1.75 | Ozawkie, KS |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 20, 8:15 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 4.6 hours before the alert went out and 35 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
- 2129 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 1308 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 204 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 8.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KTOP 210435 SVRTOP KSC087-210515- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TOPEKA KS 1135 PM CDT FRI APR 20 2001 THE NATIONAL WEATHER SERVICE IN TOPEKA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... JEFFERSON COUNTY IN NORTHEAST KANSAS * UNTIL 1215 AM CDT * AT 1129 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 9 MILES NORTHWEST OF VALLEY FALLS TO 9 MILES WEST OF GRANTVILLE...OR FROM 25 MILES NORTH OF TOPEKA TO 3 MILES NORTHWEST OF TOPEKA...MOVING EAST AT 55 MPH. * SOME LOCATIONS AFFECTED... OZAWKIE PERRY LAKE NORTONVILLE PERRY OSKALOOSA WILLIAMSTOWN WINCHESTER MCLOUTH LARGE HAIL...VERY HEAVY RAIN AND DAMAGING WINDS ARE LIKELY WITH THIS STORM. TAKE COVER INSIDE A BUILDING. STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA OUTLETS FOR THE LATEST SEVERE WEATHER INFORMATION. LAT...LON 3940 9556 3907 9557 3905 9520 3940 9518
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 20, 3:00 PM CDT, 8 hours 35 minutes earlier.
Area forecast discussion, Apr 20, 3:00 PM CDT, 8 hours 35 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 3 PM CDT FRI APR 20 2001 THUNDERSTORM CHANCES ARE MAIN FORECAST CONCERN THROUGH THE WEEKEND. LATEST SATELLITE SHOWING EXTENSIVE MID AND HIGH CLOUDS CONTINUING ACROSS THE REGION...WHICH MAY THIN OUT LATER...BUT SHOULD PERSIST THROUGH MUCH OF THE NIGHT. WARM FRONT HAS LIFTED NORTH INTO SOUTHERN NEBRASKA WITH DRYLINE EXTENDING SOUTHWESTWARD THROUGH WESTCENTRAL KANSAS. INITIAL SHORTWAVE MOVING ACROSS THE AREA WILL BE REPLACED BY STRONGER SHORTWAVE NOW MOVING THROUGH THE CENTRAL ROCKIES. VERY STRONG CAP IN PLACE ALTHOUGH BETTER POTENTIAL FOR CAP BEING BROKE LATER IN THE NIGHT AS WAVE LIFTS OUT AND TEMPORARY BACKING FLOW ALLOWS DEEPER LOW LEVEL MOISTURE TO RETURN. SOME POTENTIAL FOR CONVECTION TO DEVELOP EARLIER AHEAD OF DRYLINE. WILL KEEP POPS GOING ALL AREAS WITH HIGHER POPS AND BETTER SEVERE POTENTIAL ACROSS THE NORTH AND NORTHCENTRAL. AS SFC LOW MOVES OFF TO THE NORTHEAST EXPECT FRONT TO MOVE INTO THE CWA FROM WEST OVERNIGHT BUT NOT MAKE IT MUCH FURTHER SOUTHEAST THAN THE EASTCENTRAL AREAS. WOULD EXPECT THE POSSIBILITY OF MORE CONVECTION TO REDEVELOP ALONG AND NORTH OF BOUNDARY IN THE AFTERNOON OVER SOUTHERN 2/3 OF THE CWA WITH A BETTER CHANCE INTO THE NIGHT AS NEXT SHORTWAVE EMERGES FROM THE HIGH PLAINS. WILL INCREASE POPS ACROSS THE CWA SATURDAY NIGHT TO AROUND 50 PERCENT. MAIN UPPER LOW WILL BEGIN TO APPROACH THE AREA SUNDAY INTO SUNDAY NIGHT. EXTENSIVE CLOUDS AND SOME PRECIP WILL LIKELY HELP TO LIMIT HIGHS TEMPS. WILL GO WITH COMPROMISE OF COOLER FWC SATURDAY AND WARMER MAV/FAN FOR SUNDAY. WILL ALSO GO WITH LIKELY POPS SUNDAY NIGHT AS MAING UPPER LEVEL PUSH ENTERS THE CWA FROM WEST TO EAST. .TOP...NONE. 63
In the hours before
Local storm report, Apr 20, 9:55 PM CDT, 1 hour 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
955 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0930 PM 2 E NILES KS .75 INCH HAIL
04/20/01 OTTAWALocal storm report, Apr 20, 10:28 PM CDT, 1 hour 7 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1028 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1007 PM 8 SW ABILENE KS .88 INCH HAIL
04/20/01 DICKINSON
1025 PM 7 S ABILENE KS .88 INCH HAIL
04/20/01 DICKINSONLocal storm report, Apr 20, 10:34 PM CDT, 1 hour 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1034 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1033 PM 5 E ENTERPRISE KS 1 INCH HAIL
04/20/01 DICKINSON FUNNEL CLOUDLocal storm report, Apr 20, 10:48 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1048 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
A
1035 PM 8 E FT RILEY KS TSTM GUST
04/20/01 GEARY SEMI TRAILER OVERTURNED
I-70 EXIT 307Local storm report, Apr 20, 11:14 PM CDT, 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1114 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1112 PM 13 SW HOLTON KS 1 INCH HAIL
04/20/01 JACKSONLocal storm report, Apr 20, 11:16 PM CDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1116 PM CDT FRI APR 20 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1100 PM 1 NE ALMA KS 60+ MPH TSTM GUST
04/20/01 WABAUNSEE SHERIFF DISPATCHERThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 20, 8:08 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Ottawa, Republic | 47 min |
| Apr 20, 8:39 PM CDT | Severe Thunderstorm Warning | TOP | Washington | 51 min |
| Apr 20, 8:51 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Cloud, Ottawa | 49 min |
| Apr 20, 9:36 PM CDT | Tornado Warning | TOP | Dickinson | 39 min |
| Apr 20, 10:06 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Riley | 39 min |
| Apr 20, 10:12 PM CDT | Tornado Warning | TOP | Dickinson | 33 min |
| Apr 20, 10:36 PM CDT | Tornado Warning | TOP | Geary | 24 min |
| Apr 20, 10:53 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Wabaunsee | 37 min |
| Apr 20, 10:58 PM CDT | Tornado Warning | TOP | Geary | 17 min |
| Apr 20, 11:08 PM CDT | Tornado Warning | TOP | Wabaunsee | 37 min |
| Apr 20, 11:09 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Shawnee | 36 min |
| Apr 20, 11:29 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Riley | 31 min |
| Apr 20, 11:41 PM CDT | Tornado Warning | TOP | Shawnee | 34 min |
| Apr 20, 11:55 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Dickinson, Ottawa | 35 min |
| Apr 21, 12:08 AM CDT | Tornado Warning | TOP | Jefferson | 22 min |
| Apr 21, 12:28 AM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Geary, Riley | 32 min |
| Apr 21, 12:34 AM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 26 min |
| Apr 21, 1:37 AM CDT | Severe Thunderstorm Warning | TOP | Shawnee, Wabaunsee | 23 min |
| Apr 21, 1:43 AM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Geary, Morris | 32 min |
| Apr 21, 4:29 PM CDT | Severe Thunderstorm Warning | TOP | Morris | 46 min |
| Apr 21, 5:07 PM CDT | Severe Thunderstorm Warning | TOP | Wabaunsee | 53 min |
| Apr 21, 5:27 PM CDT | Severe Thunderstorm Warning | TOP | Shawnee | 48 min |
| Apr 21, 5:56 PM CDT | Severe Thunderstorm Warning | TOP | Wabaunsee | 49 min |
Nearby
Severe Thunderstorm Warnings in Kansas, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.