Alert archive / Iowa / Special Weather Statements in 2020
Special Weather Statement, NWS Quad Cities, IA
NWS Quad Cities, IA issued this special weather statement at Aug 9, 2020, 9:55 AM CDT for Dubuque County, Iowa. It was in force for 65 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 9, 2020, 9:55 AM CDT (14:55 UTC)
- Expired
- Aug 9, 2020, 11:00 AM CDT
- In force
- 65 min
- Issued by
- NWS Quad Cities, IA
County Dubuque County, IA
The radar
The Quad Cities radar (KDVN), 111 km from the middle of the area, began a volume at 14:56 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, 2.9 hours before the alert went out and 112 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
- 1113 J/kg
- Mixed-layer CIN
- -172 J/kg
- Mixed-layer LCL
- 885 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- -14 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>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 Quad Cities, IA wrote its last area forecast discussion before this special weather statement went out at Aug 9, 5:42 AM CDT, 4 hours 13 minutes earlier.
Area forecast discussion, Aug 9, 5:42 AM CDT, 4 hours 13 minutes before
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<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
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</html>Hazardous weather outlook, Aug 9, 4:06 AM CDT, 5 hours 49 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 406 AM CDT Sun Aug 9 2020 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-101000- Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson- Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson- Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll- Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson- Warren-Hancock-McDonough-Scotland-Clark- 406 AM CDT Sun Aug 9 2020 This Hazardous Weather Outlook is for portions of north central Illinois...northwest Illinois...west central Illinois...east central Iowa...northeast Iowa...southeast Iowa and northeast Missouri. .DAY ONE...TODAY AND TONIGHT Hot and humid conditions will increase today, with heat index levels this afternoon and early evening ranging from 95 to 100. Some spots may exceed 100 heat index this afternoon, and a heat advisory may be required. In any case, those outside working should plan on frequent breaks and make sure to drink plenty of water. The Storm Prediction Center is forecasting a Slight risk for severe storms in areas north of Interstate 80 through tonight, and a marginal risk farther south. While a warm layer of air above the ground may prevent storms from forming today and tonight, there is a chance that storms over Minnesota build south towards the area this afternoon and evening. If that happens, then these storms will bring the threat of damaging winds and heavy rainfall. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY There will be a chance for more thunderstorms on Monday and Monday evening. Strong to severe thunderstorms will be possible with damaging wind and large hail the primary threats. Locally heavy rainfall and flash flooding in areas that experience repeated thunderstorms will also be a concern. The Storm Prediction Center has a marginal risk of severe thunderstorms across most of the Outlook Area for Monday. There will be periodic chances for thunderstorms from Tuesday night through Friday, but severe weather potential appears low at this time. Very warm and humid conditions will continue on Monday with heat index readings ranging from the mid 90s to near 100 degrees. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and tonight. Ervin/12
In the hours before
Special weather statement, Aug 9, 8:06 AM CDT, 1 hour 49 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
806 AM CDT Sun Aug 9 2020
IAC011-019-091345-
Buchanan-Benton-
806 AM CDT Sun Aug 9 2020
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT WESTERN BUCHANAN AND
NORTHERN BENTON COUNTIES UNTIL 845 AM CDT...
At 806 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Tripoli to near Dysart. Movement was
east at 25 mph.
Wind gusts up to 50 mph and penny size hail are possible with these
storms.
Locations impacted include...
Independence, Jesup, Urbana, Fairbank, Hazleton, Brandon, Rowley,
Mount Auburn, Lime Creek County Park, Wapsipinicon Golf Course,
Rodgers Park, Fontana County Park, Littleton, Buchanan County
Fairgrounds, Otterville, Spencers Grove, Minne Estema Park,
Independence Airport, Wildcat Bluff Park and Fontana Park.
This includes Interstate 380 between mile markers 40 and 55.
If outdoors, consider seeking shelter inside a building.
LAT...LON 4219 9184 4218 9230 4230 9230 4230 9206
4247 9206 4247 9208 4264 9208 4264 9183
TIME...MOT...LOC 1306Z 274DEG 23KT 4283 9230 4220 9228
SpeckSpecial weather statement, Aug 9, 8:39 AM CDT, 1 hour 16 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
839 AM CDT Sun Aug 9 2020
IAC019-091445-
Buchanan-
839 AM CDT Sun Aug 9 2020
...A STRONG THUNDERSTORM WILL AFFECT BUCHANAN COUNTY UNTIL 945 AM
CDT...
At 839 AM CDT, a strong thunderstorm was located over Jesup, or 11
miles west of Independence, moving east at 20 mph.
Winds of 40 to 50 mph and half inch hail are possible with this
storm.
Locations impacted include...
Independence, Jesup, Fairbank, Winthrop, Hazleton, Quasqueton,
Lamont, Brandon, Rowley, Aurora, Stanley, Lime Creek County Park,
Winthrop Golf Course, Wapsipinicon Golf Course, Fontana County Park,
Littleton, Monti, Buchanan County Fairgrounds, Otterville and
Independence Airport.
This includes Interstate 380 between mile markers 49 and 55.
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4264 9161 4230 9160 4230 9206 4247 9206
4247 9208 4264 9208
TIME...MOT...LOC 1339Z 270DEG 18KT 4243 9210
SpeckSpecial weather statement, Aug 9, 9:16 AM CDT, 39 minutes before
Special Weather Statement National Weather Service Quad Cities IA/IL 916 AM CDT Sun Aug 9 2020 IAC055-091500- Delaware- 916 AM CDT Sun Aug 9 2020 ...A STRONG THUNDERSTORM WILL AFFECT DELAWARE COUNTY UNTIL 1000 AM CDT... At 916 AM CDT, a strong thunderstorm was located near Masonville, or 9 miles west of Manchester, moving east at 20 mph. Winds in excess of 40 mph and pea size hail are possible with this storm. Locations impacted include... Manchester, Dyersville, Edgewood, Earlville, Hopkinton, Delhi, Colesburg, Ryan, Greeley, Dundee, Delaware, Masonville, Oneida, Robinson, Delaware County Fairgrounds, Manchester Airport, Coffins Grove Park, Twin Bridges Park, Buck Creek and Baileys Ford Park. LAT...LON 4230 9113 4230 9160 4264 9160 4265 9114 TIME...MOT...LOC 1416Z 270DEG 18KT 4246 9165 Speck
Special weather statement, Aug 9, 9:55 AM CDT, 0 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
955 AM CDT Sun Aug 9 2020
IAC055-061-091600-
Dubuque-Delaware-
955 AM CDT Sun Aug 9 2020
...A STRONG THUNDERSTORM WILL AFFECT DUBUQUE AND NORTHEASTERN
DELAWARE COUNTIES UNTIL 1100 AM CDT...
At 955 AM CDT, a strong thunderstorm was located over Earlville, or
10 miles east of Manchester, moving east at 20 mph.
Winds in excess of 40 mph and half inch hail are possible with this
storm.
Locations impacted include...
Dubuque, Asbury, Dyersville, Epworth, Farley, Peosta, Earlville, New
Vienna, Colesburg, Holy Cross, Luxemburg, Rickardsville, Sherrill,
Centralia, Sageville, Balltown, Bankston, Durango, Graf and Dubuque
Regional Airport.
LAT...LON 4264 9072 4263 9070 4258 9068 4239 9067
4245 9131 4265 9134 4265 9090 4267 9089
TIME...MOT...LOC 1455Z 273DEG 17KT 4252 9126
SpeckThe office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 8:06 AM CDT | Special Weather Statement | DVN | Buchanan | 39 min |
| Aug 9, 8:39 AM CDT | Special Weather Statement | DVN | Buchanan | 66 min |
| Aug 9, 9:16 AM CDT | Special Weather Statement | DVN | Delaware | 44 min |
| Aug 9, 12:49 PM CDT | Special Weather Statement | DVN | Delaware | 41 min |
| Aug 9, 1:28 PM CDT | Special Weather Statement | DVN | Delaware | 47 min |
| Aug 9, 5:23 PM CDT | Special Weather Statement | DVN | Stephenson | 7 min |
Nearby
Special Weather Statements in Iowa, 2020Every special weather statement in 2020
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.