Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 77, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at May 19, 2012, 7:31 PM CDT for 6 counties in Minnesota; Polk County, Wisconsin. It was in force for 59 min. 5 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
- May 19, 2012, 7:31 PM CDT (00:31 UTC)
- Expired
- May 19, 2012, 8:30 PM CDT
- In force
- 59 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Anoka County, MN, Chisago County, MN, Dakota County, MN, Hennepin County, MN, Ramsey County, MN, Washington County, MN, Polk County, WI
The radar
The Minneapolis radar (KMPX), 63 km from the middle of the area, began a volume at 00:35 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 |
|---|---|---|---|
| May 19, 7:34 PM CDT | HAIL 1 | 5 Sw St Paul, MN | |
| May 19, 7:35 PM CDT | HAIL 1.75 | St Paul, MN | WESTERN ST. PAUL |
| May 19, 7:38 PM CDT | HAIL 0.88 | 2 Nw St Paul, MN | |
| May 19, 7:40 PM CDT | HAIL 0.75 | 1 Wsw St Paul, MN | |
| May 19, 7:52 PM CDT | HAIL 0.88 | St Paul, MN | ONE BLOCK NORTHWEST OF CAPITAL. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.5 hours before the alert went out and 65 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
- 1062 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 2089 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 139 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
975
WUUS53 KMPX 200031
SVRMPX
MNC003-025-037-053-123-163-WIC095-200130-
/O.NEW.KMPX.SV.W.0077.120520T0031Z-120520T0130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
731 PM CDT SAT MAY 19 2012
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
SOUTHEASTERN CHISAGO COUNTY IN EAST CENTRAL MINNESOTA...
NORTH CENTRAL DAKOTA COUNTY IN EAST CENTRAL MINNESOTA...
EXTREME SOUTHEASTERN HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...
RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
SOUTHWESTERN POLK COUNTY IN NORTHWEST WISCONSIN...
* UNTIL 830 PM CDT
* AT 730 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM...CAPABLE OF
PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR
MAHTOMEDI...OR ABOUT 12 MILES NORTHEAST OF ST PAUL...AND MOVING
NORTHEAST AT 35 MPH.
LOCATIONS IN THE WARNING INCLUDE...
ST PAUL...
FOREST LAKE...
MAHTOMEDI...
WILLERNIE...
WHITE BEAR LAKE...
NORTH OAKS...
NORTH ST PAUL...
VADNAIS HEIGHTS...
LINO LAKES...
LAKE ELMO...
OAKDALE...
MAPLEWOOD...
LITTLE CANADA...
SHOREVIEW...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR LARGE
HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
&&
LAT...LON 4537 9267 4521 9270 4520 9277 4511 9274
4508 9280 4505 9280 4503 9276 4496 9276
4482 9279 4469 9285 4477 9306 4487 9324
4540 9302
TIME...MOT...LOC 0032Z 217DEG 30KT 4510 9296
WIND...HAIL <50MPH 1.00IN
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:05 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti | 55 min |
| May 19, 7:05 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Rice, Scott | 40 min |
| May 19, 7:51 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Scott | 38 min |
| May 19, 8:06 PM CDT | Areal Flood Advisory | MPX | Dakota, Hennepin, Ramsey, Scott | 3 hr |
| May 19, 8:52 PM CDT | Special Weather Statement | MPX | Brown, Nicollet, Sibley, Watonwan | 38 min |
| May 20, 1:10 AM CDT | Special Weather Statement | MPX | Benton, Mille Lacs | 50 min |
| May 20, 1:43 AM CDT | Special Weather Statement | MPX | Anoka, Chisago, Isanti, Ramsey, Washington | 47 min |
| May 19, 7:42 PM CDT | Severe Thunderstorm Warning | MPX | Polk, Saint Croix | 63 min |
| May 20, 12:38 PM CDT | Special Weather Statement | MPX | Eau Claire | 52 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2012Severe Thunderstorm Warnings in Wisconsin, 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.