Alert archive / Iowa / Severe Thunderstorm Warnings in 1996
Severe Thunderstorm Warning 7, NWS Quad Cities, IA
NWS Quad Cities, IA issued this severe thunderstorm warning at Feb 27, 1996, 12:24 AM CST for Lee County, Iowa. It was in force for 36 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 27, 1996, 12:24 AM CST (06:24 UTC)
- Expired
- Feb 27, 1996, 1:00 AM CST
- In force
- 36 min
- Issued by
- NWS Quad Cities, IA
- Area
- Whole counties
County Lee County, IA
The radar
The Quad Cities radar (KDVN), 131 km from the middle of the area, began a volume at 06:24 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 |
|---|---|---|---|
| Feb 27, 12:29 AM CST | Hail 1.5 | Ft Madison, 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 nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.4 hours before the alert went out and 136 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
- 78 J/kg
- Mixed-layer CIN
- -177 J/kg
- Mixed-layer LCL
- 513 m above ground
- 0-6 km bulk shear
- 98 kt
- 0-1 km storm-relative helicity
- 594 m²/s²
- 0-3 km storm-relative helicity
- 656 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.1
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 26, 1:39 PM CST, 10 hours 45 minutes earlier.
Area forecast discussion, Feb 26, 1:39 PM CST, 10 hours 45 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 120 PM CST MON FEB 26 1996 18Z MAPS DATA DEPICTED SURFACE BOUNDARY SITUATED STILL OVER SOUTHEAST IOWA WITH 70 DEGREE AIR KNOCKING ON BRL DOORSTEP. AFTERNOON SATELLITE IMAGERY SHOWED BREAKS IN THE OVERCAST IN THE WARM SECTOR FROM SOUTHWEST MISSOURI TO CENTRAL ILLINOIS. STRONGEST THETA-E ADVECTION WAS EVIDENT FROM NORTHEAST MISSOURI INTO CENTRAL ILLINOIS IN CLOSE PROXIMITY TO BOUNDARY. FORECAST PROBLEM TONIGHT IS TRW CHANCES. MODELS IN GENERAL AGREEMENT THIS AFTERNOON WITH NGM INITIALIZING QUITE WELL WITH 18Z SURFACE FEATURES. GRIDDED DATA TIME-SECTIONS BRINGS STRONGEST INSTABILITY AND BEST LIFT INTO REGION BETWEEN 06Z-12Z. BEST QG FORCING IS EVIDENT IN THE 850-700 LAYER WITH STRONGEST QG ASCENT THROUGH THE COLUMN NORTH ACROSS MINNESTOA AND WISCONSIN IN VICINITY OF DEFORMATION ZONE. SURFACE LOW SHOULD PASS OVER EASTERN IOWA BY 12Z WITH ASSOCIATED DRY PUNCH. SUGGEST CAT LIKELY POPS TONIGHT. CURRENT SEVERE WORDING IN CHI ZONES APPEARS PRUDENT OVERNIGHT. PROJECTED WIND PROFILES SUPPORTS SUPERCELLUR DEVELOPEMENT WITH TORNADIC DEVELOPMENT A DISTINCT POSSIBILITY. STAY TUNED. CID RISING/+ DBQ RISING/+ MLnI RISING/+ BRL RISING/+ BERG
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 26, 7:01 PM CST | Severe Thunderstorm Warning | DVN | Henry | 44 min |
| Feb 26, 7:20 PM CST | Severe Thunderstorm Warning | DVN | Whiteside | 40 min |
| Feb 27, 12:33 AM CST | Severe Thunderstorm Warning | DVN | Hancock | 27 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1996Every severe thunderstorm warning in 1996
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.