Alert archive / Missouri / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 21, NWS Kansas City, MO

March 29, 2012Atchison County, Holt County, Missouri

NWS Kansas City, MO issued this severe thunderstorm warning at Mar 29, 2012, 8:40 PM CDT for Atchison County, Holt County, Missouri. It was in force for 35 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Mar 29, 2012, 8:40 PM CDT (01:40 UTC)
Expired: Mar 29, 2012, 9:15 PM CDT
In force: 35 min
Issued by: NWS Kansas City, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 50.0 mph

Counties Atchison County, MO, Holt County, MO

The radar

The Omaha radar (KOAX), 137 km from the middle of the area, began a volume at 01:43 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Mar 29, 5:10 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 1.7 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 761 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 647 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 76 m²/s²
0-3 km storm-relative helicity: 99 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

652 
WUUS53 KEAX 300140
SVREAX
MOC005-087-300215-
/O.NEW.KEAX.SV.W.0021.120330T0140Z-120330T0215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
840 PM CDT THU MAR 29 2012

THE NATIONAL WEATHER SERVICE IN PLEASANT HILL HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN ATCHISON COUNTY IN NORTHWEST MISSOURI...
  NORTHWESTERN HOLT COUNTY IN NORTHWEST MISSOURI...

* UNTIL 915 PM CDT

* AT 834 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS 
STORM WAS LOCATED NEAR SHUBERT...OR 11 MILES NORTH OF FALLS CITY...  
AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  FAIRFAX AND CORNING.

THIS WILL IMPACT

 I-29 BETWEEN MILE MARKERS 93 AND 107.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT THURSDAY EVENING
FOR NORTHEAST KANSAS AND NORTHWEST MISSOURI.

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 4031 9566 4044 9539 4026 9518 4017 9547
      4019 9549 4022 9547 4024 9549 4024 9552
      4025 9555 4026 9556 4029 9556 4031 9561
      4030 9564
TIME...MOT...LOC 0139Z 238DEG 31KT 4025 9556
WIND...HAIL <50MPH 1.75IN

$$

ACH

1 follow-up statement

706 
WWUS53 KEAX 300208
SVSEAX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE KANSAS CITY/PLEASANT HILL MO
908 PM CDT THU MAR 29 2012

MOC005-087-300217-
/O.EXP.KEAX.SV.W.0021.000000T0000Z-120330T0215Z/
HOLT MO-ATCHISON MO-
908 PM CDT THU MAR 29 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ATCHISON AND
NORTHWESTERN HOLT COUNTIES WILL EXPIRE AT 915 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
 HOWEVER SMALL HAIL IS STILL POSSIBLE WITH THIS THUNDERSTORM.

LAT...LON 4031 9566 4044 9539 4026 9518 4017 9547
      4019 9549 4022 9547 4024 9549 4024 9552
      4025 9555 4026 9556 4029 9556 4031 9561
      4030 9564
TIME...MOT...LOC 0207Z 238DEG 31KT 4038 9529

$$

ACH

The office that day

Everything else NWS Kansas City, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 29, 7:26 PM CDT	Severe Thunderstorm Warning	EAX	Atchison	34 min
Mar 29, 7:36 PM CDT	Tornado Warning	EAX	Atchison	24 min
Mar 29, 7:57 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	48 min
Mar 29, 8:08 PM CDT	Severe Thunderstorm Warning	EAX	Atchison	37 min
Mar 29, 8:43 PM CDT	Severe Thunderstorm Warning	EAX	Atchison, Nodaway	32 min
Mar 30, 12:20 AM CDT	River Flood Warning	EAX	Carroll, Chariton, Linn, Livingston	39 hr
Mar 30, 4:54 AM CDT	River Flood Warning	EAX	Andrew, Nodaway	15 hr
Mar 30, 9:45 AM CDT	River Flood Warning	EAX	Andrew, Buchanan	23 hr

Nearby

Severe Thunderstorm Warnings in Missouri, 2012 Every severe thunderstorm warning in 2012

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.