Alert archive / Minnesota / Tornado Warnings in 2009
Tornado Warning 30, NWS Twin Cities, MN
NWS Twin Cities, MN issued this tornado warning at Aug 8, 2009, 9:13 PM CDT for Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 32 min. 3 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 8, 2009, 9:13 PM CDT (02:13 UTC)
- Expired
- Aug 8, 2009, 9:45 PM CDT
- In force
- 32 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
Counties Anoka County, MN, Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 52 km from the middle of the area, began a volume at 02:16 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 8, 9:16 PM CDT | TSTM WND DMG | 1 N New Brighton, MN | TREE DOWN ACROSS PATH IN LONG LAKE PARK. |
| Aug 8, 9:16 PM CDT | TSTM WND DMG | 3 Se Blaine, MN | TWO TREES DOWN IN THE CITY OF LEXINGTON AT RESTWOOD ROAD AND SYNDICATE AVENUE. |
| Aug 8, 9:45 PM CDT | TSTM WND DMG | 1 Sse Hugo, MN | TREE DOWN ACROSS ROAD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 8, 3:46 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 2.2 hours before the alert went out and 54 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
- 3715 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 3.8
- Supercell composite
- 16.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WFUS53 KMPX 090213 TORMPX MNC003-123-163-090245- /O.NEW.KMPX.TO.W.0030.090809T0213Z-090809T0245Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 913 PM CDT SAT AUG 8 2009 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN ANOKA COUNTY IN EAST CENTRAL MINNESOTA... NORTHERN WASHINGTON COUNTY IN EAST CENTRAL MINNESOTA... NORTHERN RAMSEY COUNTY IN EAST CENTRAL MINNESOTA... * UNTIL 945 PM CDT * AT 911 PM CDT...RADAR WAS TRACKING A SEVERE STORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS NEAR FRIDLEY... AND MOVING EAST AT 35 MPH. THIS STORM HAS A HISTORY OF TORNADOES. * LOCATIONS IN THE WARNING INCLUDE... FRIDLEY... MOUNDSVIEW... ARDEN HILLS... LEXINGTON... SHOREVIEW... CIRCLE PINES... VADNAIS HEIGHTS... NORTH OAKS... LINO LAKES... CENTERVILLE... WHITE BEAR LAKE... MAHTOMEDI... WILLERNIE... HUGO... 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. && LAT...LON 4520 9289 4505 9283 4504 9327 4513 9327 TIME...MOT...LOC 0212Z 257DEG 32KT 4509 9320 $$
1 follow-up statement
000 WWUS53 KMPX 090231 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 931 PM CDT SAT AUG 8 2009 MNC003-123-163-090245- /O.CON.KMPX.TO.W.0030.000000T0000Z-090809T0245Z/ ANOKA MN-WASHINGTON MN-RAMSEY MN- 931 PM CDT SAT AUG 8 2009 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 945 PM CDT FOR NORTHEASTERN RAMSEY...NORTHERN WASHINGTON AND SOUTHEASTERN ANOKA COUNTIES... AT 928 PM CDT...RADAR INDICATED A SEVERE THUNDERSTORM WITH STRONG ROTATION. THE MOST DANGEROUS PART OF THE STORM WAS NEAR NORTH OAKS...AND MOVING EAST AT 35 MPH. DO NOT GO OUTSIDE TO TRY TO SEE THE TORNADO. IT IS TOO DARK TO SEE THIS LATE AFTER SUNSET. LOCATIONS IN THE WARNING INCLUDE... WHITE BEAR LAKE...MAHTOMEDI...WILLERNIE...LINO LAKES...CENTERVILLE AND HUGO. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS STORM HAS A HISTORY OR PRODUCING TORNADOES AND LARGE DAMAGING HAIL. && LAT...LON 4504 9315 4516 9313 4520 9289 4505 9283 TIME...MOT...LOC 0229Z 257DEG 32KT 4513 9303 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 8:31 PM CDT | Tornado Warning | MPX | Hennepin | 29 min |
| Aug 8, 8:49 PM CDT | Tornado Warning | MPX | Anoka, Hennepin, Ramsey | 26 min |
| Aug 8, 9:43 PM CDT | Tornado Warning | MPX | Washington | 32 min |
| Aug 8, 10:01 PM CDT | Tornado Warning | MPX | Washington | 29 min |
| Aug 8, 10:14 PM CDT | Tornado Warning | MPX | Washington | 31 min |
Nearby
Tornado Warnings in Minnesota, 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.