Alert archive / Missouri / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 49, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Apr 8, 2011, 9:15 PM CDT for Clay County, Platte County, Missouri. It was in force for 30 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Apr 8, 2011, 9:15 PM CDT (02:15 UTC)
- Expired
- Apr 8, 2011, 9:45 PM CDT
- In force
- 30 min
- Issued by
- NWS Kansas City, MO
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 50.0 mph
Counties Clay County, MO, Platte County, MO
The radar
The Pleasant Hill radar (KEAX), 63 km from the middle of the area, began a volume at 02:17 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 8, 9:17 PM CDT | HAIL 1.75 | Gladstone, MO | |
| Apr 8, 9:19 PM CDT | HAIL 1.25 | 3 Nw Gladstone, MO | AT BARRY ROAD AND HIGHWAY 169. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
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 8, 9:01 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 2.3 hours before the alert went out and 103 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
- 1028 J/kg
- Mixed-layer CIN
- -353 J/kg
- Mixed-layer LCL
- 980 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 354 m²/s²
- 0-3 km storm-relative helicity
- 409 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
968 WUUS53 KEAX 090215 SVREAX MOC047-165-090245- /O.NEW.KEAX.SV.W.0049.110409T0215Z-110409T0245Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 915 PM CDT FRI APR 8 2011 THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... CLAY COUNTY IN WEST CENTRAL MISSOURI... EAST CENTRAL PLATTE COUNTY IN WEST CENTRAL MISSOURI... * UNTIL 945 PM CDT * AT 912 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING QUARTER SIZE HAIL IN THE GLADSTON AREA. DOPPLER RADAR SHOWED THIS STORM IS CAPABLE OF PRODUCING UP TO PING PONG BALL SIZE HAIL. THIS STORM WAS LOCATED OVER GLADSTONE AND MOVING NORTHEAST AT 30 MPH. A SECOND SEVERE THUNDERSTORM WILL PASS JUST EAST OF KANSAS CITY INTERNATIONAL AIRPORT. * LOCATIONS IMPACTED INCLUDE... SMITHVILLE...KEARNEY AND PLEASANT VALLEY. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3945 9457 3939 9422 3917 9453 3925 9476 TIME...MOT...LOC 0214Z 230DEG 26KT 3926 9456 WIND...HAIL <50MPH 1.50IN $$ BOOKBINDER
3 follow-up statements
568 WWUS53 KEAX 090224 SVSEAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 924 PM CDT FRI APR 8 2011 MOC047-165-090245- /O.CON.KEAX.SV.W.0049.000000T0000Z-110409T0245Z/ CLAY MO-PLATTE MO- 924 PM CDT FRI APR 8 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EAST CENTRAL PLATTE AND CLAY COUNTIES UNTIL 945 PM CDT... AT 917 PM CDT...OFF-DUTY NATIONAL WEATHER SERVICE EMPLOYEES AND TRAINED WEATHER SPOTTERS REPORTED A SEVERE THUNDERSTORM PRODUCING UP TO HALF DOLLAR SIZE HAIL IN GLADSTONE AND LIBERTY. THIS STORM WAR MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... LIBERTY. KEARNEY. CLAYCOMO. THIS WILL IMPACT THE FOLLOWING INTERSTATES... I-35 BETWEEN MILE MARKERS 14 AND 28. I-435 LOOP FROM MILE MARKERS 36 TO 51. PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 3921 9448 3929 9469 3945 9457 3939 9422 TIME...MOT...LOC 0223Z 230DEG 26KT 3930 9449 WIND...HAIL <50MPH 1.50IN $$ BOOKBINDER
364 WWUS53 KEAX 090231 SVSEAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 931 PM CDT FRI APR 8 2011 MOC165-090240- /O.CAN.KEAX.SV.W.0049.000000T0000Z-110409T0245Z/ PLATTE MO- 931 PM CDT FRI APR 8 2011 ...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL PLATTE COUNTY IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS MOVED EAST INTO CLAY COUNTY. LAT...LON 3944 9451 3939 9423 3924 9444 3932 9461 TIME...MOT...LOC 0230Z 230DEG 26KT 3931 9440 $$ MOC047-090245- /O.CON.KEAX.SV.W.0049.000000T0000Z-110409T0245Z/ CLAY MO- 931 PM CDT FRI APR 8 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN CLAY COUNTY UNTIL 945 PM CDT... AT 926 PM CDT...TRAINED WEATHER SPOTTERS CONTINUED TO REPORT A SEVERE THUNDERSTORM PRODUCING HALF DOLLAR SIZE HAIL ALONG INTERSTATE 35 BETWEEN CLAYCOMO AND KEARNEY. THIS CLUSTER OF STORMS EXTENDED FROM 4 MILES SOUTH OF SMITHVILLE...EASTWARD ACROSS LIBERTY INTO WESTERN RAY COUNTY. ALL THESE STORMS WERE MOVING NORTHEAST AT 30 MPH. LOCATIONS IMPACTED INCLUDE... LIBERTY. KEARNEY. THIS WILL IMPACT THE FOLLOWING INTERSTATES... I-35 BETWEEN MILE MARKERS 16 AND 28. I-435 LOOP FROM MILE MARKERS 40 TO 47. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 3944 9451 3939 9423 3924 9444 3932 9461 TIME...MOT...LOC 0230Z 230DEG 26KT 3931 9440 WIND...HAIL <50MPH 1.50IN $$ BOOKBINDER
519 WWUS53 KEAX 090247 SVSEAX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO 947 PM CDT FRI APR 8 2011 MOC047-090256- /O.EXP.KEAX.SV.W.0049.000000T0000Z-110409T0245Z/ CLAY MO- 947 PM CDT FRI APR 8 2011 ...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN CLAY COUNTY HAS EXPIRED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED SLIGHTLY...BUT WILL REMAIN CAPABLE OF PRODUCING UP TO NICKEL SIZE HAIL FROM KEARNEY TO HOLT...ALONG WITH FREQUENT LIGHTNING AND A BRIEF DOWNPOUR. ADDITIONAL STRONG TO SEVERE THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 3 AM. LAT...LON 3944 9451 3939 9423 3924 9444 3932 9461 TIME...MOT...LOC 0231Z 230DEG 26KT 3931 9439 $$ BOOKBINDER
The office that day
Everything else NWS Kansas City, MO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 8, 8:50 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Platte | 25 min |
| Apr 8, 9:26 PM CDT | Severe Thunderstorm Warning | EAX | Clay, Ray | 34 min |
| Apr 8, 9:34 PM CDT | Severe Thunderstorm Warning | EAX | Bates | 26 min |
| Apr 8, 9:45 PM CDT | Special Weather Statement | EAX | Clay | 45 min |
| Apr 8, 9:59 PM CDT | Special Weather Statement | EAX | Ray | 46 min |
| Apr 8, 9:59 PM CDT | Severe Thunderstorm Warning | EAX | Cass | 31 min |
| Apr 8, 10:08 PM CDT | Severe Thunderstorm Warning | EAX | Ray | 23 min |
| Apr 8, 10:25 PM CDT | Special Weather Statement | EAX | Cass | 35 min |
| Apr 8, 10:29 PM CDT | Special Weather Statement | EAX | Cass | 31 min |
| Apr 8, 10:50 PM CDT | Special Weather Statement | EAX | Clay | 25 min |
| Apr 8, 10:51 PM CDT | Special Weather Statement | EAX | Buchanan | 39 min |
| Apr 8, 10:56 PM CDT | Severe Thunderstorm Warning | EAX | Buchanan, Platte | 36 min |
| Apr 8, 11:00 PM CDT | Special Weather Statement | EAX | Carroll | 30 min |
| Apr 8, 11:13 PM CDT | Special Weather Statement | EAX | Clinton | 32 min |
| Apr 8, 11:16 PM CDT | Special Weather Statement | EAX | Ray | 29 min |
| Apr 8, 11:22 PM CDT | Severe Thunderstorm Warning | EAX | Buchanan, Clinton | 23 min |
| Apr 8, 11:27 PM CDT | Severe Thunderstorm Warning | EAX | Carroll, Ray | 33 min |
| Apr 8, 11:37 PM CDT | Severe Thunderstorm Warning | EAX | Caldwell, Carroll, Livingston | 23 min |
| Apr 8, 11:41 PM CDT | Special Weather Statement | EAX | Caldwell | 34 min |
| Apr 8, 11:46 PM CDT | Special Weather Statement | EAX | Pettis | 29 min |
| Apr 9, 12:08 AM CDT | Special Weather Statement | EAX | Macon | 52 min |
| Apr 9, 2:07 AM CDT | Special Weather Statement | EAX | Randolph | 23 min |
Nearby
Severe Thunderstorm Warnings in Missouri, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.