Alert archive / Missouri / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 80, NWS St. Louis, MO
NWS St. Louis, MO issued this severe thunderstorm warning at Mar 28, 2012, 6:56 PM CDT for Iron County, Madison County, Saint Francois County, Missouri. It was in force for 28 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
- Mar 28, 2012, 6:56 PM CDT (23:56 UTC)
- Expired
- Mar 28, 2012, 7:24 PM CDT
- In force
- 28 min
- Issued by
- NWS St. Louis, MO
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Iron County, MO, Madison County, MO, Saint Francois County, MO
The radar
The St Louis radar (KLSX), 126 km from the middle of the area, began a volume at 23:56 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 |
|---|---|---|---|
| Mar 28, 7:05 PM CDT | HAIL 1.25 | Pilot Knob, MO | |
| Mar 28, 7:07 PM CDT | HAIL 0.88 | 2 E Arcadia, MO | PENNY TO NICKEL SIZE HAIL ON HIGHWAY 72 |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.9 hours before the alert went out and 303 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
- 160 J/kg
- Mixed-layer CIN
- -224 J/kg
- Mixed-layer LCL
- 1162 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 114 m²/s²
- 0-3 km storm-relative helicity
- 71 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
488 WUUS53 KLSX 282356 SVRLSX MOC093-123-187-290045- /O.NEW.KLSX.SV.W.0080.120328T2356Z-120329T0045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ST LOUIS MO 656 PM CDT WED MAR 28 2012 THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... IRON COUNTY IN SOUTHEAST MISSOURI... NORTHWESTERN MADISON COUNTY IN SOUTHEAST MISSOURI... SOUTHERN ST. FRANCOIS COUNTY IN SOUTHEAST MISSOURI... * UNTIL 745 PM CDT * AT 652 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR PILOT KNOB...OR NEAR IRONTON...AND MOVING SOUTHEAST AT 10 MPH. AT 653 PM QUARTER SIZE HAIL WAS REPORTED AT PILOT KOB. * LOCATIONS IMPACTED INCLUDE... IRONTON...ARCADIA...ROSELLE AND CATHERINE PLACE. 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 3759 9029 3739 9046 3759 9075 3772 9062 TIME...MOT...LOC 2356Z 302DEG 10KT 3762 9063 WIND...HAIL <50MPH 1.00IN $$ GKS
2 follow-up statements
731 WWUS53 KLSX 290014 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 714 PM CDT WED MAR 28 2012 MOC093-123-187-290045- /O.CON.KLSX.SV.W.0080.000000T0000Z-120329T0045Z/ IRON MO-MADISON MO-ST. FRANCOIS MO- 714 PM CDT WED MAR 28 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN ST. FRANCOIS...NORTHWESTERN MADISON AND IRON COUNTIES UNTIL 745 PM CDT... AT 709 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR ROSELLE...OR NEAR IRONTON...MOVING SOUTHEAST AT 20 MPH. IN ADDITION...AT 705 PM...ONE AND ONE QUARTER INCH DIAMETER SIZE HAIL WAS REPORTED IN PILOT KNOB WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... ROSELLE AND CATHERINE PLACE. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS. && LAT...LON 3758 9070 3770 9060 3759 9029 3739 9046 TIME...MOT...LOC 0012Z 303DEG 17KT 3758 9056 WIND...HAIL <50MPH 1.00IN $$ GKS
992 WWUS53 KLSX 290024 SVSLSX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE ST LOUIS MO 724 PM CDT WED MAR 28 2012 MOC093-123-187-290034- /O.CAN.KLSX.SV.W.0080.000000T0000Z-120329T0045Z/ IRON MO-MADISON MO-ST. FRANCOIS MO- 724 PM CDT WED MAR 28 2012 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN ST. FRANCOIS... NORTHWESTERN MADISON AND IRON COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 3758 9070 3770 9060 3759 9029 3739 9046 TIME...MOT...LOC 0024Z 285DEG 48KT 3754 9038 $$ GKS
Nearby
Severe Thunderstorm Warnings in Missouri, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.