Alert archive / Minnesota / Tornado Warnings in 2007

Tornado Warning 5, NWS Twin Cities, MN

May 23, 2007Anoka County, Hennepin County, Minnesota

NWS Twin Cities, MN issued this tornado warning at May 23, 2007, 2:25 PM CDT for Anoka County, Hennepin County, Minnesota. It was in force for 35 min. 9 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 23, 2007, 2:25 PM CDT (19:25 UTC)
Expired
May 23, 2007, 3:00 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Counties, with a storm outline in the text

Counties Anoka County, MN, Hennepin County, MN

The radar

The Minneapolis radar (KMPX), 32 km from the middle of the area, began a volume at 19:25 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

TimeReportWhereRemark
May 23, 2:25 PM CDTTSTM WND DMGBrooklyn Park, MNTREE LIMBS DOWN
May 23, 2:25 PM CDTHAIL 1Brooklyn Park, MNAT HIGHWAY 169 AND HIGHWAY 81.
May 23, 2:25 PM CDTHAIL 1.75Brooklyn Park, MN
May 23, 2:25 PM CDTHAIL 2.75Brooklyn Park, MNBASEBALL SIZED HAIL REPORTED ALONG WITH UNKNOWN WIND DAMAGE AT INTERSECTION OF SCHMITT LAKE ROAD AND HIGHWAY 169. ALSO HALF DOLLAR TO PING PONG SIZED HAIL REPORTED NEAR 694 AND 85TH AVENUE.
May 23, 2:26 PM CDTHAIL 2.5Brooklyn Park, MNMEASURED AT INTERSECTION OF 73RD AND ZANE.
May 23, 2:26 PM CDTHAIL 2.5Brooklyn Park, MN
May 23, 2:30 PM CDTHAIL 0.88Brooklyn Park, MNNEAR ZANE AND CO RD 30
May 23, 2:30 PM CDTHAIL 1.75Crystal, MNNEAR CRYSTAL AIRPORT
May 23, 2:36 PM CDTHAIL 1Spring Lake Park, MN

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, 7.4 hours before the alert went out and 33 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.

Skew-T log-pSkew-T log-p diagram, Minneapolis, MN at 12:00Z on 2007-05-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 84 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Minneapolis, MN at 12:00Z on 2007-05-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 141 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
84 J/kg
Mixed-layer CIN
-48 J/kg
Mixed-layer LCL
811 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
141 m²/s²
0-3 km storm-relative helicity
164 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS53 KMPX 231925
TORMPX
MNC003-053-232000-
/O.NEW.KMPX.TO.W.0005.070523T1925Z-070523T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
225 PM CDT WED MAY 23 2007

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...
  HENNEPIN COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 300 PM CDT

* AT 224 PM CDT...RADAR INDICATED A STORM CAPABLE OF PRODUCING A
  TORNADO. THE MOST DANGEROUS PART OF THE STORM WAS NEAR NEW HOPE...
  OR ABOUT OVER PLYMOUTH...AND MOVING NORTHEAST AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  BROOKLYN CENTER...
  OSSEO...
  BROOKLYN PARK...
  FRIDLEY...
  CHAMPLIN...
  SPRING LAKE PARK...
  ANOKA...
  COON RAPIDS...
  OAK PARK...
  BLAINE...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER 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 4504 9354 4496 9336 4520 9315 4529 9339

$$

TDK
1 follow-up statement
000 
WWUS53 KMPX 231938
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
238 PM CDT WED MAY 23 2007

MNC003-053-232000-
/O.CON.KMPX.TO.W.0005.000000T0000Z-070523T2000Z/
ANOKA MN-HENNEPIN MN-
238 PM CDT WED MAY 23 2007

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR HENNEPIN
AND ANOKA COUNTIES...

AT 237 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE 
THUNDERSTORM WITH ROTATION.  THE SEVERE THUNDERSTORM WAS LOCATED 
NEAR BROOKLYN PARK...AND MOVING NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE SPRING LAKE PARK...OAK PARK...
ROBBINSDALE...PLYMOUTH...OSSEO...NEW HOPE...MAPLE GROVE...AND 
FRIDLEY.

THERE HAVE BEEN REPORTS OF WIND DAMAGE IN PLYMOUTH. IT IS UNCERTAIN 
WHETHER THIS IS DOWNBURST DAMAGE OR IF THERE MIGHT BE A TORNADO. 

TENNIS BALL SIZE HAIL WAS REPORTED IN BROOKLYN PARK AT 225 PM.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER 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 4504 9354 4496 9336 4520 9315 4529 9339

$$

TDK

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 23, 2:06 PM CDTSevere Thunderstorm WarningMPXHennepin39 min
May 23, 2:39 PM CDTSevere Thunderstorm WarningMPXRamsey, Washington51 min
May 23, 2:43 PM CDTSevere Thunderstorm WarningMPXBlue Earth, Faribault62 min
May 23, 3:12 PM CDTSevere Thunderstorm WarningMPXWaseca46 min
May 23, 3:18 PM CDTSevere Thunderstorm WarningMPXDakota42 min
May 23, 3:22 PM CDTSevere Thunderstorm WarningMPXChisago53 min
May 23, 3:29 PM CDTSevere Thunderstorm WarningMPXRamsey, Washington61 min
May 23, 3:42 PM CDTSevere Thunderstorm WarningMPXRice46 min
May 23, 4:07 PM CDTTornado WarningMPXGoodhue53 min
May 23, 4:18 PM CDTTornado WarningMPXDakota20 min
May 23, 5:01 PM CDTSevere Thunderstorm WarningMPXGoodhue44 min
May 23, 6:49 PM CDTSevere Thunderstorm WarningMPXFaribault41 min
May 23, 6:57 PM CDTFlash Flood WarningMPXFaribault, Freeborn3 hr

Nearby

Tornado Warnings in Minnesota, 2007Every tornado warning in 2007Tornadoes in 2007

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.