Alert archive / Minnesota / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 40, NWS Twin Cities, MN

May 29, 2008Anoka County, Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at May 29, 2008, 5:55 PM CDT for Anoka County, Minnesota. It was in force for 35 min. 1 report 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 29, 2008, 5:55 PM CDT (22:55 UTC)
Expired
May 29, 2008, 6:30 PM CDT
In force
35 min
Issued by
NWS Twin Cities, MN
Area
Storm-based polygon

County Anoka County, MN

The radar

The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 22:55 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 29, 6:00 PM CDTHAIL 0.752 Nnw Anoka, 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, 10.9 hours before the alert went out and 49 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 2008-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2008-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1093 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
61 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 
WUUS53 KMPX 292255
SVRMPX
MNC003-292330-
/O.NEW.KMPX.SV.W.0040.080529T2255Z-080529T2330Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
555 PM CDT THU MAY 29 2008

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ANOKA COUNTY IN EAST CENTRAL MINNESOTA...

* UNTIL 630 PM CDT

* AT 550 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
  CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS STORM WAS LOCATED 4
  MILES WEST OF ANOKA...AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ANDOVER...
  EAST BETHEL...
  RAMSEY...

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.

REPORT ANY DAMAGE TO YOUR LOCAL EMERGENCY MANAGER...OR THE NEAREST
LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4518 9303 4519 9341 4522 9344 4523 9349
      4524 9351 4528 9351 4541 9308
TIME...MOT...LOC 2255Z 257DEG 48KT 4524 9338

$$

KAT
2 follow-up statements
000 
WWUS53 KMPX 292311
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
610 PM CDT THU MAY 29 2008

MNC003-292330-
/O.CON.KMPX.SV.W.0040.000000T0000Z-080529T2330Z/
ANOKA MN-
610 PM CDT THU MAY 29 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR CENTRAL ANOKA COUNTY...

AT 607 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS SEVERE
THUNDERSTORM WAS LOCATED NEAR RAMSEY...OR ABOUT 6 MILES NORTHWEST OF
ANOKA...AND MOVING EAST AT 43 MPH.

THE STORM INITIALLY WARNED FOR HAS MOVED INTO FAR EASTERN ANOKA 
COUNTY...AND HAS WEAKENED. THIS STORM IS LIKELY PRODUCING HEAVY 
RAIN...DEADLY LIGHTNING...AND POSSIBLY PEA SIZE HAIL TO AREAS JUST 
EAST OF HAM LAKE.

OTHER LOCATIONS IN THE WARNING INCLUDE CEDAR...HAM LAKE...EAST
BETHEL...ANDOVER AND RAMSEY.

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.

REPORT ANY DAMAGE TO YOUR LOCAL EMERGENCY MANAGER...OR THE NEAREST
LAW ENFORCEMENT AGENCY...FOR RELAY TO THE NATIONAL WEATHER SERVICE.

LAT...LON 4524 9349 4528 9351 4537 9322 4537 9320
      4538 9317 4526 9312
TIME...MOT...LOC 2310Z 254DEG 37KT 4527 9344

$$

KAT
000 
WWUS53 KMPX 292322
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
621 PM CDT THU MAY 29 2008

MNC003-292331-
/O.EXP.KMPX.SV.W.0040.000000T0000Z-080529T2330Z/
ANOKA MN-
621 PM CDT THU MAY 29 2008

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ANOKA COUNTY EXPIRES
AT 630 PM CDT...

AT 600 PM CDT...HAIL UP TO THE SIZE OF PENNIES WAS REPORTED NEAR 
RAMSEY WITH THE STORM.

THE STORMS HAVE WEAKENED TO BELOW SEVERE LIMITS...AND 
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE. HEAVY 
DOWNPOURS...PEA SIZED HAIL...AND DANGEROUS LIGHTNING WILL REMAIN 
POSSIBLE ACROSS PORTIONS OF ANOKA COUNTY THROUGH THE EVENING.

LAT...LON 4524 9349 4528 9351 4537 9322 4537 9320
      4538 9317 4526 9312
TIME...MOT...LOC 2321Z 254DEG 37KT 4530 9328

$$

KAT

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 9:17 AM CDTFlash Flood WatchMPXBlue Earth, Brown, Faribault, Freeborn, Martin, Steele and 2 more16 hr
May 29, 4:43 PM CDTSevere Thunderstorm WarningMPXCarver, Le Sueur, Scott, Sibley32 min
May 29, 5:06 PM CDTSevere Thunderstorm WarningMPXCarver, Scott, Sibley24 min
May 29, 5:24 PM CDTSevere Thunderstorm WarningMPXDakota, Hennepin, Scott19 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2008Every severe thunderstorm warning in 2008

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.