Alert archive / Minnesota / Special Weather Statements in 2012
Special Weather Statement, NWS Twin Cities, MN
NWS Twin Cities, MN issued this special weather statement at May 20, 2012, 1:43 AM CDT for 5 counties in Minnesota. It was in force for 47 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
- May 20, 2012, 1:43 AM CDT (06:43 UTC)
- Expired
- May 20, 2012, 2:30 AM CDT
- In force
- 47 min
- Issued by
- NWS Twin Cities, MN
Counties Anoka County, MN, Chisago County, MN, Isanti County, MN, Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 73 km from the middle of the area, began a volume at 06:47 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 6.7 hours before the alert went out and 74 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.
212
WWUS83 KMPX 200643
SPSMPX
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
143 AM CDT SUN MAY 20 2012
MNZ045-052-053-060>063-070-200730-
ANOKA-CHISAGO-DAKOTA-HENNEPIN-ISANTI-KANABEC-RAMSEY-WASHINGTON-
143 AM CDT SUN MAY 20 2012
...THUNDERSTORMS MOVING INTO OR DEVELOPING ACROSS THE NORTHERN AND
EASTERN METRO AND NORTH TO CAMBRIDGE AND RUSH CITY...
AT 137 AM CDT...WEATHER SERVICE RADAR WAS TRACKING STRONG
THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES WEST OF
CAMBRIDGE TO ST PAUL AND INVER GROVE HEIGHTS. THESE STORMS
WERE MOVING NORTHEAST AT 45 MPH.
ONE HALF INCH DIAMETER HAIL...WINDS UP TO 40 MPH...FREQUENT LIGHTNING
AND HEAVY DOWNPOURS ARE EXPECTED WITH THESE STORMS.
* LOCATIONS IN OR NEAR THE PATH OF THESE STORMS INCLUDE...
CAMBRIDGE.
FOREST LAKE.
ST PAUL.
BLAINE.
WHITE BEAR LAKE.
LAT...LON 4574 9313 4574 9306 4539 9277 4490 9283
4466 9300 4514 9341 4569 9348 4576 9314
TIME...MOT...LOC 0637Z 241DEG 37KT 4551 9342 4513 9330
4468 9295
$$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, 7:31 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Chisago, Dakota, Hennepin, Ramsey, Washington | 59 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 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
Special Weather Statements in Minnesota, 2012Every special weather statement 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.