Alert archive / Iowa / Special Weather Statements in 2016
Special Weather Statement, NWS Des Moines, IA
NWS Des Moines, IA issued this special weather statement at Aug 2, 2016, 8:21 AM CDT for Poweshiek County, Iowa. It was in force for 39 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
- Aug 2, 2016, 8:21 AM CDT (13:21 UTC)
- Expired
- Aug 2, 2016, 9:00 AM CDT
- In force
- 39 min
- Issued by
- NWS Des Moines, IA
County Poweshiek County, IA
The radar
The Des Moines radar (KDMX), 109 km from the middle of the area, began a volume at 13:21 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
Davenport, (KDVN), launched 12:00Z, 1.4 hours before the alert went out and 161 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.
- Mixed-layer CAPE
- 172 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 922 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 144 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.7
The text
As transmitted.
532
WWUS83 KDMX 021321
SPSDMX
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE DES MOINES IA
821 AM CDT TUE AUG 2 2016
IAZ062-075-021400-
MAHASKA IA-POWESHIEK IA-
821 AM CDT TUE AUG 2 2016
...LINE OF STRONG STORMS MAY PRODUCE WIND GUSTS TO 40 MPH AND
PERIODS OF HEAVY RAIN...
AT 819 AM CDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM 8 MILES NORTHWEST OF BROOKLYN TO 7 MILES
SOUTHEAST OF NEW SHARON. MOVEMENT WAS EAST AT 30 MPH.
WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THESE STORMS.
LOCATIONS IMPACTED INCLUDE...
MONTEZUMA...BROOKLYN...VICTOR...HOLIDAY LAKE...MALCOM...DEEP RIVER...
BARNES CITY...HARTWICK AND GUERNSEY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY LEAD TO
LOCALIZED PONDING OF WATER ON ROADWAYS. DO NOT DRIVE YOUR VEHICLE
THROUGH FLOODED ROADWAYS.
&&
LAT...LON 4151 9241 4132 9241 4138 9261 4186 9260
4186 9230 4151 9230
TIME...MOT...LOC 1319Z 278DEG 26KT 4181 9256 4139 9255
$$
KOTENBERGThe office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 2, 3:44 AM CDT | Flash Flood Watch | DMX | Adair, Adams, Appanoose, Audubon, Cass, Clarke and 11 more | 8 hr |
Nearby
Special Weather Statements in Iowa, 2016Every special weather statement in 2016
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.