Alert archive / Minnesota / Tornado Warnings in 2009
Tornado Warning 42, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 19, 2009, 3:16 PM CDT for Polk County, Saint Croix County, Wisconsin; Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 29 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
- Aug 19, 2009, 3:16 PM CDT (20:16 UTC)
- Expired
- Aug 19, 2009, 3:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Anoka County, MN, Ramsey County, MN, Washington County, MN, Polk County, WI, Saint Croix County, WI
The radar
The Minneapolis radar (KMPX), 72 km from the middle of the area, began a volume at 20:16 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 |
|---|---|---|---|
| Aug 19, 3:25 PM CDT | TORNADO | S Marine On St Croix, MN | DAMAGE SURVEY REVEALED AN EF-0 TORNADO MOVED 0.7 MILE THROUGH THE WESTERN SECTION OF MARINE ON ST CROIX. SCATTERED TREES AND LARGE LIMBS WERE DOWNED. |
| Aug 19, 3:30 PM CDT | TSTM WND DMG | 1 E Hudson, WI | 4 INCH BRANCHES IN ROAD AND WHOLE TREES DOWN ON HWY 12 ONE HALF TO ONE MILE EAST OF HUDSON. |
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 12:00Z, 8.3 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
- 368 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 615 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 3.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WFUS53 KMPX 192016
TORMPX
MNC003-123-163-WIC095-109-192045-
/O.NEW.KMPX.TO.W.0042.090819T2016Z-090819T2045Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
316 PM CDT WED AUG 19 2009
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* TORNADO WARNING FOR...
EASTERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA...
NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA...
SOUTHWESTERN POLK COUNTY IN NORTHWEST WISCONSIN...
NORTHWESTERN ST. CROIX COUNTY IN WEST CENTRAL WISCONSIN...
* UNTIL 345 PM CDT
* AT 315 PM CDT...RADAR INDICATED A LINE OF STORMS CAPABLE OF
PRODUCING BRIEF TORNADOS. THE MOST DANGEROUS PART OF THE
STORM WAS SHOREVIEW TO BURKHARDT...AND MOVING NORTH AT 35 MPH.
* LOCATIONS IN THE WARNING INCLUDE...
WILLERNIE...
VADNAIS HEIGHTS...
MAHTOMEDI...
STILLWATER...
NEW BRIGHTON...
WHITE BEAR LAKE...
ARDEN HILLS...
SHOREVIEW...
MOUNDS VIEW...
NORTH OAKS...
SOMERSET...
CIRCLE PINES...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 4530 9301 4530 9274 4533 9269 4535 9269
4538 9267 4537 9240 4497 9261 4495 9299
4504 9321 4539 9321 4538 9302
TIME...MOT...LOC 2015Z 181DEG 32KT 4502 9270
$$1 follow-up statement
000
WWUS53 KMPX 192029
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
329 PM CDT WED AUG 19 2009
MNC003-123-163-WIC095-109-192045-
/O.CON.KMPX.TO.W.0042.000000T0000Z-090819T2045Z/
ANOKA MN-WASHINGTON MN-RAMSEY MN-POLK WI-ST. CROIX WI-
329 PM CDT WED AUG 19 2009
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 345 PM CDT FOR
NORTHWESTERN ST. CROIX...SOUTHWESTERN POLK...NORTHERN RAMSEY...
NORTHERN WASHINGTON AND EASTERN ANOKA COUNTIES...
AT 327 PM CDT...RADAR CONTINUED TO INDICATE A NUMBER OF
THUNDERSTORMS LOCATED FROM NEAR BLAINE EAST THROUGH HUGO TO STAR
PRAIRIE. THESE STORMS COULD PRODUCE BRIEF TORNADOES AS THEY MOVE
NORTH AT 40 MPH.
LOCATIONS IN THE WARNING INCLUDE...
MARINE ON ST CROIX...STAR PRAIRIE...OTISVILLE...HAM LAKE...SCANDIA...
FOREST LAKE...WANDEROOS...OSCEOLA...DRESSER...EAST BETHEL...
HUNTINGTON AND EAST FARMINGTON.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN A TORNADO WARNING IS ISSUED BASED ON RADAR...IT MEANS THAT
STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY ALREADY
BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.
IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED
BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW
SPOT AND COVER YOUR HEAD WITH YOUR HANDS.
&&
LAT...LON 4538 9304 4534 9301 4530 9302 4530 9274
4533 9269 4538 9266 4537 9240 4501 9259
4505 9296 4510 9321 4539 9321
TIME...MOT...LOC 2027Z 182DEG 33KT 4516 9275
$$The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 2:43 PM CDT | Tornado Warning | MPX | Pierce | 32 min |
| Aug 19, 2:53 PM CDT | Tornado Warning | MPX | Saint Croix | 22 min |
| Aug 19, 2:57 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 48 min |
| Aug 19, 4:04 PM CDT | Tornado Warning | MPX | Dunn, Saint Croix | 26 min |
| Aug 19, 4:06 PM CDT | Tornado Warning | MPX | Pierce, Saint Croix | 39 min |
| Aug 19, 4:14 PM CDT | Tornado Warning | MPX | Barron, Polk | 46 min |
| Aug 19, 4:21 PM CDT | Tornado Warning | MPX | Polk | 39 min |
| Aug 19, 4:33 PM CDT | Tornado Warning | MPX | Saint Croix | 27 min |
| Aug 19, 4:43 PM CDT | Tornado Warning | MPX | Dunn, Pierce, Saint Croix | 47 min |
| Aug 19, 5:13 PM CDT | Tornado Warning | MPX | Barron, Dunn, Polk, Saint Croix | 47 min |
| Aug 18, 11:39 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Lac qui Parle, Stevens, Swift | 36 min |
| Aug 19, 12:20 AM CDT | Special Weather Statement | MPX | Swift | 40 min |
| Aug 19, 12:41 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Swift | 34 min |
| Aug 19, 12:59 AM CDT | Special Weather Statement | MPX | Swift | 46 min |
| Aug 19, 1:18 AM CDT | Special Weather Statement | MPX | Kandiyohi | 42 min |
| Aug 19, 2:16 AM CDT | Areal Flood Advisory | MPX | Chippewa, Kandiyohi, Lac qui Parle, Meeker, Swift | 5 hr |
| Aug 19, 1:04 PM CDT | Areal Flood Advisory | MPX | Anoka, Carver, Chisago, Hennepin, Isanti, Kanabec and 7 more | 6 hr |
| Aug 19, 2:11 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 34 min |
| Aug 19, 2:16 PM CDT | Tornado Warning | MPX | Dakota | 29 min |
| Aug 19, 3:46 PM CDT | Tornado Warning | MPX | Anoka, Chisago, Washington | 29 min |
| Aug 19, 4:49 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Yellow Medicine | 41 min |
| Aug 19, 5:18 PM CDT | Severe Thunderstorm Warning | MPX | Redwood | 21 min |
| Aug 19, 5:24 PM CDT | Special Weather Statement | MPX | Chippewa, Swift | 51 min |
| Aug 19, 6:02 PM CDT | Severe Thunderstorm Warning | MPX | Brown, Redwood | 58 min |
| Aug 19, 6:19 PM CDT | Tornado Warning | MPX | Brown | 26 min |
| Aug 19, 6:29 PM CDT | Tornado Warning | MPX | Brown | 31 min |
| Aug 19, 6:39 PM CDT | Tornado Warning | MPX | Brown | 36 min |
| Aug 19, 6:44 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Renville | 44 min |
Nearby
Tornado Warnings in Minnesota, 2009Tornado Warnings in Wisconsin, 2009Every tornado warning in 2009Tornadoes in 2009
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.