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 Mar 28, 2020, 3:57 AM CDT for Jefferson County, Iowa. It was in force for 33 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
- Mar 28, 2020, 3:57 AM CDT (08:57 UTC)
- Expired
- Mar 28, 2020, 4:30 AM CDT
- In force
- 33 min
- Issued by
- NWS Quad Cities, IA
County Jefferson County, IA
The radar
The Quad Cities radar (KDVN), 136 km from the middle of the area, began a volume at 09:00 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 00:00Z, 9.0 hours before the alert went out and 142 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
- 4 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 610 m above ground
- 0-6 km bulk shear
- 85 kt
- 0-1 km storm-relative helicity
- 302 m²/s²
- 0-3 km storm-relative helicity
- 512 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.1
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 Mar 28, 3:49 AM CDT, 8 minutes earlier.
Area forecast discussion, Mar 28, 3:49 AM CDT, 8 minutes before
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</html>Hazardous weather outlook, Mar 27, 4:37 PM CDT, 11 hours 20 minutes before
Hazardous Weather Outlook National Weather Service Quad Cities IA IL 437 PM CDT Fri Mar 27 2020 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-281100- 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- 437 PM CDT Fri Mar 27 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...LATE AFTERNOON AND TONIGHT A slight risk for severe thunderstorms continues for counties generally along and south of Interstate 80 from late tonight into early Saturday morning. The primary threats are large hail and lightning. These storms will also produce locally heavy downpours. Area rivers are experiencing flooding. Please see the latest Flood Statements and Flood Warnings for details. Additional widespread rainfall through Saturday could lead to renewed rises on area rivers, including the Mississippi River, and possibly higher crest levels into early next week. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY There is a risk of severe storms Saturday across the entire area. The Storm Prediction Center is maintaining a moderate risk of severe storms south and east of a line from Sterling, Illinois to Muscatine, Iowa and to Keokuk, Iowa. This includes much of west central Illinois. Thunderstorms will be ongoing at sunrise Saturday. The storms are then expected to push north of Interstate 80 through late morning. Some of these morning storms may be strong, and an isolated severe storm cannot be ruled out. Severe storms are expected to develop after 1 PM CDT Saturday afternoon, and then sweep eastward through 8 PM Saturday evening. Damaging winds and large hail are expected. Isolated tornadoes are also possible. The storms on Saturday afternoon will be fast moving so there will be less time to react to an approaching storm. Strong southwesterly gradient winds may gust up to 45 mph late Saturday afternoon and evening. Then west to northwest sustained winds of 25 to 35 mph with gusts potentially up to 50 mph are expected on Sunday. The windy conditions will promote an elevated fire danger late Saturday afternoon and again on Sunday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed later tonight and is likely on Saturday. 12
In the hours before
Special weather statement, Mar 28, 1:37 AM CDT, 2 hours 20 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
137 AM CDT Sat Mar 28 2020
IAC107-183-280700-
Keokuk-Washington-
137 AM CDT Sat Mar 28 2020
...A STRONG THUNDERSTORM WILL AFFECT KEOKUK AND WEST CENTRAL
WASHINGTON COUNTIES UNTIL 200 AM CDT...
At 136 AM CDT, a strong thunderstorm was located near Hayesville, or
8 miles southwest of Sigourney, moving northeast at 45 mph.
Half inch hail is likely with this storm.
Locations impacted include...
Sigourney, Hedrick, Delta, South English, Harper, Martinsburg,
Kinross, Hayesville, Keota, Webster, Lancaster, Keokuk County Expo,
Lake Belva Deer Park, Yenruogis County Park and Talleyrand.
Torrential rainfall is also occurring with this storm. Minor flooding
of low lying areas, creeks, streams and urban areas is possible. If
you encounter water over a roadway, do not drive through it.
LAT...LON 4130 9241 4151 9204 4134 9185 4116 9222
4116 9238 4120 9241
TIME...MOT...LOC 0636Z 234DEG 41KT 4124 9231
McClureLocal storm report, Mar 28, 1:38 AM CDT, 2 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
138 AM CDT SAT MAR 28 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0111 AM FLASH FLOOD DAVENPORT 41.56N 90.60W
03/28/2020 SCOTT IA DEPT OF HIGHWAYS
NUMEROUS ROADS CLOSED ACROSS THE CITY DUE TO
FLASH FLOODING.
&&Special weather statement, Mar 28, 2:29 AM CDT, 1 hour 28 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
229 AM CDT Sat Mar 28 2020
IAC031-045-280800-
Cedar-Clinton-
229 AM CDT Sat Mar 28 2020
...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL CEDAR AND
NORTHWESTERN CLINTON COUNTIES UNTIL 300 AM CDT...
At 229 AM CDT, a strong thunderstorm was located over Lowden, or 12
miles northeast of Tipton, moving northeast at 45 mph.
Nickel size hail is possible with this storm.
Locations impacted include...
Lowden, Wheatland, Delmar, Welton, Toronto and Walnut Grove Park.
Torrential rainfall is also occurring with this storm. Minor flooding
of low lying areas, creeks, streams and urban areas is possible. If
you encounter water over a roadway, do not drive through it.
LAT...LON 4190 9051 4179 9095 4187 9098 4203 9065
4203 9063
TIME...MOT...LOC 0729Z 244DEG 38KT 4185 9092
McClureSpecial weather statement, Mar 28, 2:44 AM CDT, 1 hour 13 minutes before
Special Weather Statement National Weather Service Quad Cities IA/IL 244 AM CDT Sat Mar 28 2020 IAC031-103-139-163-280815- Cedar-Scott-Johnson-Muscatine- 244 AM CDT Sat Mar 28 2020 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN CEDAR...WEST CENTRAL SCOTT...EAST CENTRAL JOHNSON AND NORTHWESTERN MUSCATINE COUNTIES UNTIL 315 AM CDT... At 244 AM CDT, a strong thunderstorm was located over West Liberty, or 7 miles south of West Branch, moving northeast at 45 mph. Half inch hail is likely with this storm. Locations impacted include... Durant, West Liberty, Wilton, Bennett, Nichols, Atalissa, Rochester, Stockton, Muscatine County Fairgrounds, Moscow and Sunbury. This includes Interstate 80 in Iowa between mile markers 259 and 279. Torrential rainfall is also occurring with this storm. Minor flooding of low lying areas, creeks, streams and urban areas is possible. If you encounter water over a roadway, do not drive through it. LAT...LON 4147 9135 4158 9141 4182 9099 4158 9085 TIME...MOT...LOC 0744Z 244DEG 37KT 4157 9130 McClure
Special weather statement, Mar 28, 3:21 AM CDT, 36 minutes before
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</html>Special weather statement, Mar 28, 3:57 AM CDT, 0 minutes before
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</html>The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 9:13 PM CDT | River Flood Watch | DVN | Dubuque | 61 hr |
| Mar 27, 11:51 PM CDT | Flash Flood Warning | DVN | Muscatine, Scott | 4 hr |
| Mar 28, 12:35 AM CDT | Special Weather Statement | DVN | Iowa | 25 min |
| Mar 28, 1:05 AM CDT | Special Weather Statement | DVN | Iowa, Johnson | 40 min |
| Mar 28, 1:37 AM CDT | Special Weather Statement | DVN | Keokuk | 23 min |
| Mar 28, 1:53 AM CDT | Severe Thunderstorm Warning | DVN | Keokuk, Washington | 26 min |
| Mar 28, 2:29 AM CDT | Special Weather Statement | DVN | Clinton | 31 min |
| Mar 28, 2:44 AM CDT | Special Weather Statement | DVN | Cedar | 31 min |
| Mar 28, 2:55 AM CDT | Severe Thunderstorm Warning | DVN | Clinton, Jackson | 35 min |
| Mar 28, 4:21 AM CDT | Special Weather Statement | DVN | Louisa | 24 min |
| Mar 28, 5:19 AM CDT | Special Weather Statement | DVN | Iowa | 26 min |
| Mar 28, 10:52 AM CDT | River Flood Warning | DVN | Dubuque, Jackson | 22 days |
| Mar 28, 10:52 AM CDT | River Flood Warning | DVN | Clinton, Scott | 24 days |
| Mar 28, 10:52 AM CDT | River Flood Warning | DVN | Lee | 21 days |
| Mar 28, 11:21 AM CDT | Special Weather Statement | DVN | Washington | 24 min |
| Mar 28, 11:25 AM CDT | River Flood Watch | DVN | Clinton | 21 days |
| Mar 28, 11:25 AM CDT | River Flood Watch | DVN | Scott | 10 hr |
| Mar 28, 6:03 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan | 42 min |
| Mar 28, 6:13 PM CDT | Tornado Warning | DVN | Benton, Buchanan | 47 min |
| Mar 28, 6:53 PM CDT | Tornado Warning | DVN | Buchanan, Delaware | 28 min |
| Mar 27, 11:32 PM CDT | Special Weather Statement | DVN | Rock Island, Whiteside | 58 min |
| Mar 28, 3:21 AM CDT | Special Weather Statement | DVN | Carroll | 24 min |
| Mar 28, 4:49 AM CDT | Special Weather Statement | DVN | Mercer | 26 min |
| Mar 28, 5:15 AM CDT | Special Weather Statement | DVN | Rock Island | 30 min |
| Mar 28, 10:39 AM CDT | River Flood Watch | DVN | Whiteside | 24 hr |
| Mar 28, 3:42 PM CDT | Special Weather Statement | DVN | Rock Island | 33 min |
| Mar 28, 4:15 PM CDT | Special Weather Statement | DVN | Carroll, Stephenson | 30 min |
| Mar 28, 4:48 PM CDT | Tornado Warning | DVN | Warren | 42 min |
| Mar 28, 5:29 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 31 min |
| Mar 28, 5:52 PM CDT | Tornado Warning | DVN | Bureau, Henry | 38 min |
| Mar 28, 6:33 PM CDT | Tornado Warning | DVN | Henderson, Warren | 42 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.