Alert archive / Iowa / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 230, NWS Des Moines, IA

June 13, 2001Crawford County, Iowa

NWS Des Moines, IA issued this severe thunderstorm warning at Jun 13, 2001, 10:50 PM CDT for Crawford County, Iowa. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued: Jun 13, 2001, 10:50 PM CDT (03:50 UTC)
Expired: Jun 13, 2001, 11:15 PM CDT
In force: 25 min
Issued by: NWS Des Moines, IA
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Crawford County, IA

The radar

The Omaha radar (KOAX), 115 km from the middle of the area, began a volume at 03:50 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
Jun 13, 11:01 PM CDT	Thunderstorm Wind 52 E	Denison, IA

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 13, 6:15 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 3.8 hours before the alert went out and 116 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: 4371 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1290 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 175 m²/s²
Significant tornado parameter: 2.5
Supercell composite: 17.4

Open this sounding in Storm Lab

The text

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

418 
WUUS53 KDMX 140350
SVRDSM
IAC047-140415-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE DES MOINES IA
1050 PM CDT WED JUN 13 2001

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CRAWFORD COUNTY IN WEST CENTRAL IOWA

* UNTIL 1115 PM CDT

* AT 1047 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES WEST OF DENISON...OR ABOUT 56 MILES
  SOUTHEAST OF SIOUX CITY...MOVING NORTHEAST AT 55 MPH.

OTHER WARNING LOCATIONS INCLUDE MANILLA

DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED
AREA.

DAMAGING STRAIGHT-LINE WINDS OVER 75 MPH CAN SOUND JUST LIKE A
TORNADO AND CAUSE JUST AS MUCH DAMAGE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 AM THURSDAY MORNING FOR
NORTHWEST IOWA. A TORNADO WATCH ALSO REMAINS IN EFFECT UNTIL MIDNIGHT
THURSDAY MORNING FOR WEST CENTRAL IOWA.

LAT...LON 4219 9568 4187 9563 4188 9512 4215 9512
          4222 9532

What forecasters said that day

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

NWS Des Moines, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 13, 5:57 PM CDT, 4 hours 53 minutes earlier.

Area forecast discussion, Jun 13, 5:57 PM CDT, 4 hours 53 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
557 PM CDT WED JUN 13 2001

PER SELS DISC, XPCT 427 TO BE DROPPED BY 00Z.  AL ALSO DROP FFA FOR
ENTIRE CWA ATTM.  UPDTS SHUD BE OUT DURG THE NXT HR.

.DSM...FLASH FLOOD WATCH TONIGHT OVER ENTIRE CWA.
MS JUN 01

In the hours before

Local storm report, Jun 13, 6:32 PM CDT, 4 hours 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
632 PM CDT WED JUN 13 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....e

1215 PM    2 SE COOPER               IA   1 INCH HAIL
06/12/01   GREENE                         REPORTED BY PUBLIC.

The office that day

Everything else NWS Des Moines, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 13, 9:41 PM CDT	Tornado Warning	DMX	Emmet	24 min
Jun 13, 10:06 PM CDT	Severe Thunderstorm Warning	DMX	Emmet	24 min
Jun 13, 10:15 PM CDT	Severe Thunderstorm Warning	DMX	Palo Alto	30 min
Jun 13, 10:54 PM CDT	Severe Thunderstorm Warning	DMX	Sac	26 min
Jun 13, 11:22 PM CDT	Severe Thunderstorm Warning	DMX	Sac	18 min
Jun 14, 9:00 AM CDT	Severe Thunderstorm Warning	DMX	Polk, Warren	30 min
Jun 14, 9:26 AM CDT	Severe Thunderstorm Warning	DMX	Jasper	29 min
Jun 14, 2:31 PM CDT	Severe Thunderstorm Warning	DMX	Ringgold	34 min
Jun 14, 2:45 PM CDT	Severe Thunderstorm Warning	DMX	Decatur	35 min
Jun 14, 2:59 PM CDT	Tornado Warning	DMX	Decatur, Ringgold	31 min
Jun 14, 3:10 PM CDT	Severe Thunderstorm Warning	DMX	Lucas, Wayne	40 min
Jun 14, 3:19 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	31 min
Jun 14, 3:39 PM CDT	Severe Thunderstorm Warning	DMX	Appanoose, Monroe	41 min
Jun 14, 3:43 PM CDT	Severe Thunderstorm Warning	DMX	Marion, Warren	42 min
Jun 14, 3:53 PM CDT	Severe Thunderstorm Warning	DMX	Davis	32 min
Jun 14, 4:08 PM CDT	Severe Thunderstorm Warning	DMX	Jasper	32 min
Jun 14, 4:14 PM CDT	Severe Thunderstorm Warning	DMX	Mahaska	46 min
Jun 14, 4:37 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	28 min
Jun 14, 4:49 PM CDT	Severe Thunderstorm Warning	DMX	Poweshiek	41 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2001 Every severe thunderstorm warning in 2001

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.