Alert archive / Minnesota / Special Weather Statements in 2013

Special Weather Statement, NWS Twin Cities, MN

May 18, 2013Carver County, Hennepin County, Ramsey County, Minnesota

NWS Twin Cities, MN issued this special weather statement at May 18, 2013, 9:08 AM CDT for Carver County, Hennepin County, Ramsey County, Minnesota. It was in force for 37 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 18, 2013, 9:08 AM CDT (14:08 UTC)
Expired: May 18, 2013, 9:45 AM CDT
In force: 37 min
Issued by: NWS Twin Cities, MN

Counties Carver County, MN, Hennepin County, MN, Ramsey County, MN

The radar

The Minneapolis radar (KMPX), 18 km from the middle of the area, began a volume at 14:08 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

Aberdeen, SD (KABR), launched 12:00Z, 2.1 hours before the alert went out and 392 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 120 J/kg
Mixed-layer CIN: -230 J/kg
Mixed-layer LCL: 921 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Twin Cities, MN wrote its last area forecast discussion before this special weather statement went out at May 18, 7:17 AM CDT, 1 hour 51 minutes earlier.

Area forecast discussion, May 18, 7:17 AM CDT, 1 hour 51 minutes before

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Hazardous weather outlook, May 18, 4:04 AM CDT, 5 hours 4 minutes before

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In the hours before

Special weather statement, May 18, 9:08 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
908 AM CDT SAT MAY 18 2013

MNZ060>063-067>070-181445-
ANOKA-CARVER-DAKOTA-HENNEPIN-RAMSEY-SCOTT-SIBLEY-WASHINGTON-
908 AM CDT SAT MAY 18 2013

...HEAVY RAIN DEVELOPING OVER ANOKA...CARVER...DAKOTA...HENNEPIN...
RAMSEY...SCOTT...SIBLEY AND WASHINGTON COUNTIES THROUGH 945 AM CDT...

AT 906 AM CDT...WEATHER SERVICE RADAR WAS TRACKING A STRONG
THUNDERSTORM 6 MILES SOUTHWEST OF WACONIA. THIS STORM WAS MOVING
NORTHEAST AT 30 MPH.

PEA SIZE HAIL IS EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  COLOGNE.
  WACONIA.
  ST BONIFACIUS.
  VICTORIA.
  CHASKA.
  SHOREWOOD.

LAT...LON 4520 9313 4493 9297 4457 9404 4495 9382
TIME...MOT...LOC 1408Z 242DEG 24KT 4479 9385

The office that day

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

Issued	Product	Office	Counties	Lasted
May 17, 11:24 PM CDT	Special Weather Statement	MPX	Todd	51 min
May 18, 1:17 AM CDT	Special Weather Statement	MPX	Pope	28 min
May 18, 1:40 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	50 min
May 18, 2:00 AM CDT	Special Weather Statement	MPX	Douglas	30 min
May 18, 2:34 AM CDT	Special Weather Statement	MPX	Stearns	41 min
May 18, 7:42 AM CDT	Areal Flood Advisory	MPX	Carver, Dakota, Hennepin, Wright	3 hr
May 18, 2:44 PM CDT	Flash Flood Watch	MPX	Anoka, Benton, Carver, Chisago, Dakota, Douglas and 25 more	44 hr
May 18, 6:54 PM CDT	Special Weather Statement	MPX	Douglas	51 min
May 18, 6:59 PM CDT	Severe Thunderstorm Warning	MPX	Douglas	61 min

Nearby

Special Weather Statements in Minnesota, 2013 Every special weather statement in 2013

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.