Alert archive / Iowa / Tornado Warnings in 2013

Tornado Warning 8, NWS Quad Cities, IA

May 30, 2013Muscatine County, Iowa

NWS Quad Cities, IA issued this tornado warning at May 30, 2013, 4:15 PM CDT for Muscatine County, Iowa. It was in force for 30 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: May 30, 2013, 4:15 PM CDT (21:15 UTC)
Expired: May 30, 2013, 4:45 PM CDT
In force: 30 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Tornado: Observed
Hail: 0.75 in

County Muscatine County, IA

The radar

The Quad Cities radar (KDVN), 44 km from the middle of the area, began a volume at 21:15 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
May 30, 4:35 PM CDT	TSTM WND GST 75	4 N Muscatine, IA	WINDS ESTIMATED 65 TO 75 MPH.
May 30, 4:36 PM CDT	HAIL 1	6 Nnw Fairport, IA

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
May 30, 12:32 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.3 hours before the alert went out and 51 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: 378 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 920 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 127 m²/s²
0-3 km storm-relative helicity: 141 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

526 
WFUS53 KDVN 302115
TORDVN
IAC139-302145-
/O.NEW.KDVN.TO.W.0008.130530T2115Z-130530T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
415 PM CDT THU MAY 30 2013

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MUSCATINE COUNTY IN EAST CENTRAL IOWA...

* UNTIL 445 PM CDT

* AT 410 PM CDT...A CONFIRMED TORNADO WAS LOCATED NEAR LETTS...AND
  MOVING NORTHEAST AT 60 MPH.

  HAZARD...DAMAGING TORNADO.

  SOURCE...WEATHER SPOTTERS CONFIRMED TORNADO.

  IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
           SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
           OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
           EXTENSIVE TREE DAMAGE IS LIKELY.

* LOCATIONS IMPACTED INCLUDE...
  MUSCATINE...WILTON...SWEETLAND CENTER AND MOSCOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPEAT...A TORNADO IS ON THE GROUND. TAKE COVER NOW. MOVE TO AN
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID
WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE
CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4160 9110 4158 9085 4142 9102 4142 9103
      4141 9105 4139 9105 4133 9111 4137 9134
TIME...MOT...LOC 2116Z 219DEG 51KT 4138 9115

TORNADO...OBSERVED
HAIL...<.75IN

$$

ERVIN

2 follow-up statements

864 
WWUS53 KDVN 302120
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
420 PM CDT THU MAY 30 2013

IAC139-302145-
/O.CON.KDVN.TO.W.0008.000000T0000Z-130530T2145Z/
MUSCATINE IA-
420 PM CDT THU MAY 30 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR CENTRAL MUSCATINE COUNTY
UNTIL 445 PM CDT...

AT 420 PM CDT...A SEVERE SQUALL LINE CAPABLE OF PRODUCING TORNADOES
THAT MAY NOT BE VISIBLE DUE TO HEAVY RAIN WAS LOCATED NEAR
MUSCATINE...AND MOVING NORTHEAST AT 60 MPH.

HAZARD...DEVELOPING TORNADO AND SMALL HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED OR DESTROYED.
         SIGNIFICANT DAMAGE TO ROOFS...WINDOWS AND VEHICLES WILL
         OCCUR. FLYING DEBRIS WILL BE DEADLY TO PEOPLE AND ANIMALS.
         EXTENSIVE TREE DAMAGE IS LIKELY.

LOCATIONS IMPACTED INCLUDE...
WILTON...SWEETLAND CENTER AND MOSCOW.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4160 9110 4158 9085 4142 9102 4142 9103
      4141 9105 4139 9105 4133 9111 4137 9128
TIME...MOT...LOC 2121Z 219DEG 51KT 4143 9108

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

ERVIN

292 
WWUS53 KDVN 302137
SVSDVN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
437 PM CDT THU MAY 30 2013

IAC139-302148-
/O.EXP.KDVN.TO.W.0008.000000T0000Z-130530T2145Z/
MUSCATINE IA-
437 PM CDT THU MAY 30 2013

...THE TORNADO WARNING FOR CENTRAL MUSCATINE COUNTY WILL EXPIRE AT
445 PM CDT...

THE TORNADO THREAT HAS DIMINISHED...THEREFORE THE TORNADO WARNING HAS
EXPIRED. HOWEVER...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT
FOR THE AREA.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4160 9110 4158 9085 4142 9102 4142 9103
      4141 9105 4139 9105 4133 9111 4137 9128
TIME...MOT...LOC 2138Z 219DEG 51KT 4161 9087

$$

ERVIN

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 29, 7:35 PM CDT	Tornado Warning	DVN	Delaware	40 min
May 29, 8:43 PM CDT	River Flood Warning	DVN	Delaware, Jones	51 hr
May 29, 11:13 PM CDT	River Flood Warning	DVN	Muscatine, Scott	12 days
May 30, 10:14 AM CDT	River Flood Warning	DVN	Buchanan, Linn	4 days
May 30, 10:19 AM CDT	River Flood Warning	DVN	Jackson	4 days
May 30, 11:04 AM CDT	River Flood Warning	DVN	Johnson, Washington	15 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Dubuque	5 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Dubuque, Jackson	8 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Clinton	4 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Clinton, Scott	8 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Scott	6 days
May 30, 11:53 AM CDT	River Flood Warning	DVN	Muscatine	12 days
May 30, 1:26 PM CDT	Severe Thunderstorm Warning	DVN	Cedar, Des Moines, Louisa, Muscatine, Scott	49 min
May 30, 2:16 PM CDT	Tornado Warning	DVN	Dubuque	29 min
May 30, 2:41 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Lee, Van Buren	49 min
May 30, 3:09 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	51 min
May 30, 3:28 PM CDT	Severe Thunderstorm Warning	DVN	Des Moines, Henry, Iowa, Jefferson, Keokuk, Lee and 2 more	47 min
May 30, 3:50 PM CDT	Special Weather Statement	DVN	Scott	2 hr
May 30, 3:58 PM CDT	Special Weather Statement	DVN	Scott	2 hr
May 30, 3:59 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Cedar, Des Moines, Iowa, Johnson, Linn and 4 more	46 min
May 30, 4:27 PM CDT	Severe Thunderstorm Warning	DVN	Benton, Buchanan, Cedar, Delaware, Dubuque, Johnson and 2 more	63 min
May 30, 4:36 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Dubuque, Jackson, Muscatine, Scott	54 min
May 30, 5:20 PM CDT	Special Weather Statement	DVN	Scott	70 min
May 30, 5:23 PM CDT	Severe Thunderstorm Warning	DVN	Clinton, Delaware, Dubuque, Jackson	67 min

Nearby

Tornado Warnings in Iowa, 2013 Every tornado warning in 2013 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.